fac0940711
terrain_modern.frag declared `uniform float uTexTiling[36]` - the per-layer
tiling factors retail passes to TexMerge::CopyAndTile / TexMerge::Merge, one per
terrain atlas layer. Vulkan GLSL has no default uniform block, so a loose array
is unspellable there, and 144 bytes of payload cannot ride the pinned 96-byte
push-constant block. GpuBindingModel reserved UniformTerrainTiling (binding 3)
for exactly this at slice V4d. The array now lives in that block.
The ELEMENT TYPE is deliberately unchanged. std140 pads every array element out
to 16 bytes, so the block is 576 bytes rather than 144, and packing four values
per vec4 would be tighter - but it would also rewrite the accessor and every use
site, and this commit's whole value is that its pixel gate measures the move to
a uniform buffer and nothing else. `uTexTiling[int(layer)]` reads exactly as it
did.
That padding is the hazard the change introduces, so it is pinned twice. The CPU
writer walks TerrainTextureTilingTable.UniformElementStrideBytes and zero-fills
the dead words rather than blitting 36 packed floats, and a new test asserts the
stride is 16, the block is 576, and the two are consistent with LayerCapacity. A
tightly-packed writer would not crash or even look obviously wrong: the shader
would read layer 0's factor for layers 0-3, layer 4's for 4-7, and in a scene
where most layers tile at 1 the error stays invisible until a layer that does
not appears. Nothing else in the suite could see that.
The buffer is allocated once in the constructor, through the same
TrackedGlResource + ResourceCleanupGroup rollback path every other terrain
buffer uses, written on the first bound draw - preserving the upload-once
property the linked program's uniform had for free - and released through the
dispose ledger. It is REBOUND every draw rather than once: GL's uniform-buffer
binding points are global and shared with SceneLighting at 1 and the sky's
params at 4, so a renderer running between two terrain draws can take binding 3
out from under us. Self-contained render state, per the standing rule.
Gates. Release build clean. App tests 4,073 passed / 3 skipped - the baseline
4,072 plus the new layout test. Offline pixel gate against 5e13b45f: 21 differing
pixels of 563,200 compared (fraction 3.73e-05), inside the documented 15-23
pixel band and ~27x under the 0.001 threshold. This gate is a real test of the
layout rather than a formality: terrain blending, road overlays and the water
edge are most of the captured frame, and every one of those samples goes through
terrainTiling(), so a stride mismatch would have shown as a wholesale retexture
rather than as noise. The gate run's client log has zero exceptions and an empty
stderr.
Manifest regenerated in the same commit. terrain_modern's remaining Vulkan error
moved from `'uTexTiling' : undeclared identifier` to the frag's direct
`sampler2DArray(...)` construction, which is the same dialect migration V6e ran
for mesh_modern and which lands next. The pair count is unchanged at 7/9.
No divergence-register row: the tiling values, their source and their use are
unchanged, and no retail-facing behaviour moves.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
1168 lines
47 KiB
C#
1168 lines
47 KiB
C#
using System.Numerics;
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using AcDream.App.Rendering.Gpu;
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using AcDream.App.Rendering.Wb;
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using AcDream.Core.Terrain;
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using Silk.NET.OpenGL;
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namespace AcDream.App.Rendering;
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/// <summary>
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/// Phase N.5b modern terrain dispatcher. Single global VBO/EBO with a slot
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/// allocator (one slot per landblock, 384 verts × 40 bytes = 15,360 bytes
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/// per slot). Per-frame: build a DrawElementsIndirectCommand array from
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/// visible slots, upload, dispatch via glMultiDrawElementsIndirect. Atlas
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/// textures bound via bindless handles set per-frame as sampler uniforms.
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///
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/// Total ~6-8 GL calls per frame for terrain regardless of visible
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/// landblock count.
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/// </summary>
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public sealed unsafe class TerrainModernRenderer : IDisposable
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{
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// VertsPerLandblock MUST stay divisible by 6 — terrain_modern.vert uses
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// `gl_VertexID % 6` to pick the cell-corner index (BL/BR/TR/TL), and
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// because we bake `slot * VertsPerLandblock` into indices CPU-side and
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// pass BaseVertex=0 to MultiDrawElementsIndirect, gl_VertexID becomes
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// `slot * VertsPerLandblock + local_index`. The shader's modulo-6 only
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// reduces to `local_index % 6` because 384 is a multiple of 6. Changing
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// either constant without auditing the shader will silently mis-render.
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private const int VertsPerLandblock = LandblockMesh.VerticesPerLandblock; // 384 (= 64 cells * 6 verts)
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private const int IndicesPerLandblock = VertsPerLandblock;
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private const int VertexSize = 40; // sizeof(TerrainVertex)
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private const int IndexSize = sizeof(uint);
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private const float LandblockSize = LandblockMesh.LandblockSize; // 192
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private readonly GL _gl;
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private readonly BindlessSupport _bindless;
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private readonly Shader _shader;
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private readonly TerrainAtlas _atlas;
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/// <summary>A.5 T22.5: exposes the terrain atlas so callers can update
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/// anisotropic level mid-session via <see cref="TerrainAtlas.SetAnisotropic"/>.</summary>
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public TerrainAtlas Atlas => _atlas;
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private readonly GpuRetiredTerrainSlotAllocator _alloc;
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private readonly GpuRetirementLedger _retirementLedger;
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private RetryableResourceReleaseLedger? _disposeResources;
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private bool _disposed;
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// Per-slot live data (index by slot integer; null entries are unused slots).
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private SlotData?[] _slots;
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// Reverse map: landblockId -> slot, for RemoveLandblock and replacement.
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private readonly Dictionary<uint, int> _idToSlot = new();
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// GPU buffers.
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private uint _globalVao;
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private uint _globalVbo;
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private uint _globalEbo;
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private long _globalVboCapacityBytes;
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private long _globalEboCapacityBytes;
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private uint _indirectBuffer;
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private int _indirectCapacity;
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private sealed class DynamicIndirectBuffer
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{
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public uint Buffer;
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public int Capacity;
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}
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private readonly List<DynamicIndirectBuffer>[] _indirectBuffersByFrame =
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[[], [], []];
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private int _dynamicFrameSlot;
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private int _dynamicBufferCursor;
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private bool _dynamicFrameStarted;
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internal int DynamicIndirectBufferCount =>
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_indirectBuffersByFrame.Sum(frameBuffers => frameBuffers.Count);
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// Phase U.3: terrain clip UBO (binding=2, terrain_modern.vert TerrainClip).
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// The shared one is created + uploaded by the GameWindow-level ClipFrame and
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// handed in via SetClipUbo. When 0, we bind a lazily-created no-clip fallback
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// (count 0 = ungated) so the shader never reads an unbound UBO at binding=2.
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private TerrainClipBufferBinding _sharedClipBinding;
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private uint _fallbackClipUbo;
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// Campaign V slice V2b (2026-07-27): uTerrainHandle/uAlphaHandle (uvec2)
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// became uTextureIndexA/uTextureIndexB (uint table slots) — cached
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// uniform locations (matrix uniforms are set by name via Shader.SetMatrix4).
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private int _uTextureIndexALoc;
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private int _uTextureIndexBLoc;
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private bool _textureTilingUploaded;
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// Campaign V slice V6f-2: the 36 per-layer tiling factors used to be a loose
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// `uniform float uTexTiling[36]`, which Vulkan GLSL cannot declare at all.
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// They now live in the uniform buffer GpuBindingModel reserved
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// UniformTerrainTiling (binding 3) for — see terrain_modern.frag for the
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// std140 packing and why it is vec4[9] rather than float[36].
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private uint _tilingUbo;
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// GL-only emulation of the eventual Vulkan global texture descriptor array
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// (binding=9, GpuBindingModel.StorageTextureTable). Owns its own table —
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// see GlBindlessHandleTable's doc comment and the campaign doc's §5.2 for
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// why terrain doesn't share WbDrawDispatcher's/EnvCellRenderer's tables.
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private readonly GlBindlessHandleTable _textureTable = new();
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private uint _textureTableSsbo;
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private int _textureTableSsboCapacityBytes;
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// Reusable per-frame buffers.
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private readonly List<int> _visibleSlots = new();
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private readonly HashSet<uint> _visibleCellIds = new();
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private DrawElementsIndirectCommand[] _deicScratch = Array.Empty<DrawElementsIndirectCommand>();
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// Diag.
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public int LoadedSlots => _alloc.LoadedCount;
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public int VisibleSlots => _visibleSlots.Count;
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public int CapacitySlots => _alloc.Capacity;
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/// <summary>
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/// Outdoor landcells admitted by the current landscape view. The set is
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/// accumulated across doorway landscape slices and consumed after the
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/// completed render frame by particle visibility.
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/// </summary>
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internal HashSet<uint> VisibleCellIds => _visibleCellIds;
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public void BeginVisibilityFrame() => _visibleCellIds.Clear();
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public TerrainModernRenderer(
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GL gl,
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BindlessSupport bindless,
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Shader shader,
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TerrainAtlas atlas,
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int initialSlotCapacity = 64)
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: this(
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gl,
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bindless,
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shader,
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atlas,
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ImmediateGpuResourceRetirementQueue.Instance,
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initialSlotCapacity)
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{
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}
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internal TerrainModernRenderer(
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GL gl,
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BindlessSupport bindless,
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Shader shader,
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TerrainAtlas atlas,
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IGpuResourceRetirementQueue resourceRetirement,
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int initialSlotCapacity = 64)
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{
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_gl = gl;
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_bindless = bindless;
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_shader = shader;
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_atlas = atlas;
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ArgumentNullException.ThrowIfNull(resourceRetirement);
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_retirementLedger = new GpuRetirementLedger(resourceRetirement);
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_alloc = new GpuRetiredTerrainSlotAllocator(initialSlotCapacity, resourceRetirement);
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_slots = new SlotData?[initialSlotCapacity];
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_uTextureIndexALoc = _gl.GetUniformLocation(_shader.Program, "uTextureIndexA");
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_uTextureIndexBLoc = _gl.GetUniformLocation(_shader.Program, "uTextureIndexB");
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var constructionResources = new ResourceCleanupGroup();
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try
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{
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// Campaign V slice V6f-2: the tiling UBO. Fixed size — the table is
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// 36 immutable floats packed four to a vec4 — so it is allocated
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// once here and written once on the first bound draw, which is the
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// same cadence the glUniform1fv it replaces already had.
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_tilingUbo = TrackedGlResource.CreateBuffer(
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_gl,
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"creating terrain tiling UBO");
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RetryableGpuResourceRelease tilingUboRelease =
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TrackedGlResource.CreateRetryableBufferDeletion(
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_gl,
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_tilingUbo,
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TerrainTextureTilingTable.UniformBufferBytes,
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"rolling back terrain tiling UBO");
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constructionResources.Add("terrain tiling UBO", tilingUboRelease.Run);
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TrackedGlResource.AllocateBufferStorage(
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_gl,
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BufferTargetARB.UniformBuffer,
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_tilingUbo,
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0,
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TerrainTextureTilingTable.UniformBufferBytes,
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BufferUsageARB.StaticDraw,
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"allocating terrain tiling UBO");
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// Campaign V slice V2b: binding=9 texture-table SSBO (GL-only
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// emulation of the eventual Vulkan descriptor array).
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_textureTableSsbo = TrackedGlResource.CreateBuffer(
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_gl,
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"creating terrain texture-table SSBO");
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RetryableGpuResourceRelease textureTableRelease =
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TrackedGlResource.CreateRetryableBufferDeletion(
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_gl,
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_textureTableSsbo,
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() => _textureTableSsboCapacityBytes,
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"rolling back terrain texture-table SSBO");
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constructionResources.Add(
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"terrain texture-table SSBO",
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textureTableRelease.Run);
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_globalVao = TrackedGlResource.CreateVertexArray(
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_gl,
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"creating terrain global VAO");
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RetryableGpuResourceRelease globalVaoRelease =
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TrackedGlResource.CreateRetryableVertexArrayDeletion(
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_gl,
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_globalVao,
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"rolling back terrain global VAO");
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constructionResources.Add(
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"terrain global VAO",
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globalVaoRelease.Run);
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_globalVbo = TrackedGlResource.CreateBuffer(
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_gl,
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"creating terrain global vertex buffer");
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RetryableGpuResourceRelease globalVboRelease =
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TrackedGlResource.CreateRetryableBufferDeletion(
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_gl,
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_globalVbo,
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() => _globalVboCapacityBytes,
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"rolling back terrain global vertex buffer");
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constructionResources.Add(
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"terrain global vertex buffer",
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globalVboRelease.Run);
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_globalEbo = TrackedGlResource.CreateBuffer(
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_gl,
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"creating terrain global index buffer");
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RetryableGpuResourceRelease globalEboRelease =
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TrackedGlResource.CreateRetryableBufferDeletion(
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_gl,
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_globalEbo,
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() => _globalEboCapacityBytes,
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"rolling back terrain global index buffer");
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constructionResources.Add(
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"terrain global index buffer",
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globalEboRelease.Run);
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AllocateGpuBuffers(initialSlotCapacity);
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GlResourceCommand.Execute(
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_gl,
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"configure terrain global vertex array",
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() => ConfigureVao(_globalVao, _globalVbo, _globalEbo));
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constructionResources.TransferAll();
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}
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catch (Exception constructionFailure)
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{
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constructionResources.RollbackConstructionAndThrow(
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"TerrainModernRenderer construction failed and its GL prefix did not cleanly roll back.",
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constructionFailure);
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}
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}
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/// <summary>
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/// Resets the indirect-command submission cursor for a GPU-fenced frame
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/// slot. A retail outside view may draw terrain more than once in a frame;
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/// each draw receives storage that cannot overwrite an earlier command.
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/// </summary>
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public void BeginFrame(int frameSlot)
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{
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if ((uint)frameSlot >= (uint)_indirectBuffersByFrame.Length)
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throw new ArgumentOutOfRangeException(nameof(frameSlot));
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_retirementLedger.RetryPendingPublications();
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_dynamicFrameSlot = frameSlot;
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_dynamicBufferCursor = 0;
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_dynamicFrameStarted = true;
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}
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private void ActivateNextIndirectBuffer()
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{
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if (!_dynamicFrameStarted)
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throw new InvalidOperationException("BeginFrame must be called before drawing terrain.");
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List<DynamicIndirectBuffer> frameBuffers = _indirectBuffersByFrame[_dynamicFrameSlot];
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if (_dynamicBufferCursor == frameBuffers.Count)
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{
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uint buffer = TrackedGlResource.CreateBuffer(
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_gl,
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$"creating terrain indirect buffer for frame slot {_dynamicFrameSlot}");
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try
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{
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frameBuffers.Add(new DynamicIndirectBuffer { Buffer = buffer });
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}
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catch
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{
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TrackedGlResource.DeleteBuffer(
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_gl,
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buffer,
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0,
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"rolling back terrain indirect buffer");
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throw;
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}
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}
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DynamicIndirectBuffer active = frameBuffers[_dynamicBufferCursor++];
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_indirectBuffer = active.Buffer;
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_indirectCapacity = active.Capacity;
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}
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private void PersistIndirectCapacity()
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{
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_indirectBuffersByFrame[_dynamicFrameSlot][_dynamicBufferCursor - 1].Capacity =
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_indirectCapacity;
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}
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/// <summary>
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/// Hand the renderer the current aligned terrain-clip range (binding=2).
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/// Each outside-view slice occupies a distinct range in the current
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/// GPU-fenced frame's UBO arena.
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/// </summary>
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public void SetClipUbo(TerrainClipBufferBinding sharedClipBinding) =>
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_sharedClipBinding = sharedClipBinding;
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/// <summary>
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/// Two-tier streaming entry point. Accepts a prebuilt mesh from
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/// <see cref="LandblockStreamResult.Loaded.MeshData"/> built on the worker
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/// thread, together with the world-space origin computed by the caller
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/// (render-thread GameWindow derives it from landblockId + liveCenterX/Y).
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///
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/// Delegates to <see cref="AddLandblock(uint,LandblockMeshData,Vector3)"/>
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/// so both paths share one upload path. Per Phase A.5 spec T15.
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/// </summary>
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public void AddLandblockWithMesh(uint landblockId, LandblockMeshData meshData, Vector3 worldOrigin)
|
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=> AddLandblock(landblockId, meshData, worldOrigin);
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|
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public void AddLandblock(uint landblockId, LandblockMeshData meshData, Vector3 worldOrigin)
|
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{
|
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ArgumentNullException.ThrowIfNull(meshData);
|
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if (meshData.Vertices.Length != VertsPerLandblock)
|
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throw new ArgumentException(
|
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$"Expected {VertsPerLandblock} vertices, got {meshData.Vertices.Length}",
|
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nameof(meshData));
|
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if (meshData.Indices.Length != IndicesPerLandblock)
|
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throw new ArgumentException(
|
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$"Expected {IndicesPerLandblock} indices, got {meshData.Indices.Length}",
|
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nameof(meshData));
|
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|
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// A prior replacement may have committed the logical slot switch
|
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// before queue publication failed. Retry those retained physical-slot
|
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// transactions before allocating more terrain storage.
|
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_alloc.RetryPendingPublications();
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|
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bool replacing = _idToSlot.TryGetValue(landblockId, out int replacedSlot);
|
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int slot = _alloc.Allocate(out var needsGrow);
|
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bool published = false;
|
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try
|
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{
|
||
if (needsGrow)
|
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{
|
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int newCap = Math.Max(_alloc.Capacity * 2, slot + 1);
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EnsureCapacity(newCap);
|
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}
|
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|
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// Bake worldOrigin into vertex positions; capture min/max Z for AABB.
|
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var bakedVerts = new TerrainVertex[VertsPerLandblock];
|
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float zMin = float.MaxValue, zMax = float.MinValue;
|
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for (int i = 0; i < VertsPerLandblock; i++)
|
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{
|
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var v = meshData.Vertices[i];
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var worldPos = v.Position + worldOrigin;
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bakedVerts[i] = new TerrainVertex(worldPos, v.Normal, v.Data0, v.Data1, v.Data2, v.Data3);
|
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if (worldPos.Z < zMin) zMin = worldPos.Z;
|
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if (worldPos.Z > zMax) zMax = worldPos.Z;
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}
|
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if (zMin == float.MaxValue) { zMin = 0f; zMax = 0f; }
|
||
|
||
// Bake baseVertex into indices on the CPU side (driver-portable pattern).
|
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uint baseVertex = (uint)(slot * VertsPerLandblock);
|
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var bakedIndices = new uint[IndicesPerLandblock];
|
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for (int i = 0; i < IndicesPerLandblock; i++)
|
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bakedIndices[i] = meshData.Indices[i] + baseVertex;
|
||
|
||
// glBufferSubData into the slot's VBO + EBO regions.
|
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nint vboByteOffset = (nint)(slot * VertsPerLandblock * VertexSize);
|
||
nint eboByteOffset = (nint)(slot * IndicesPerLandblock * IndexSize);
|
||
|
||
fixed (TerrainVertex* p = bakedVerts)
|
||
{
|
||
TrackedGlResource.UpdateBufferSubData(
|
||
_gl,
|
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BufferTargetARB.ArrayBuffer,
|
||
_globalVbo,
|
||
vboByteOffset,
|
||
VertsPerLandblock * VertexSize,
|
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p,
|
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$"uploading terrain vertices for 0x{landblockId:X8}");
|
||
}
|
||
|
||
fixed (uint* p = bakedIndices)
|
||
{
|
||
TrackedGlResource.UpdateBufferSubData(
|
||
_gl,
|
||
BufferTargetARB.ElementArrayBuffer,
|
||
_globalEbo,
|
||
eboByteOffset,
|
||
IndicesPerLandblock * IndexSize,
|
||
p,
|
||
$"uploading terrain indices for 0x{landblockId:X8}");
|
||
}
|
||
|
||
_slots[slot] = new SlotData
|
||
{
|
||
LandblockId = landblockId,
|
||
WorldOrigin = worldOrigin,
|
||
FirstIndex = (uint)(slot * IndicesPerLandblock),
|
||
IndexCount = IndicesPerLandblock,
|
||
AabbMin = new Vector3(worldOrigin.X, worldOrigin.Y, zMin),
|
||
AabbMax = new Vector3(worldOrigin.X + LandblockSize, worldOrigin.Y + LandblockSize, zMax),
|
||
};
|
||
_idToSlot[landblockId] = slot;
|
||
published = true;
|
||
|
||
if (replacing)
|
||
{
|
||
_slots[replacedSlot] = null;
|
||
_alloc.FreeAfterGpuUse(replacedSlot);
|
||
}
|
||
}
|
||
finally
|
||
{
|
||
if (!published)
|
||
_alloc.ReleaseUnsubmitted(slot);
|
||
}
|
||
}
|
||
|
||
public void RemoveLandblock(uint landblockId)
|
||
{
|
||
// Removal clears the logical lookup before retirement publication. A
|
||
// retry therefore has to advance retained publications even when the
|
||
// landblock is no longer present in the map.
|
||
_alloc.RetryPendingPublications();
|
||
if (!_idToSlot.TryGetValue(landblockId, out var slot))
|
||
return;
|
||
_idToSlot.Remove(landblockId);
|
||
_slots[slot] = null;
|
||
_alloc.FreeAfterGpuUse(slot);
|
||
// No GPU clear: the per-frame DEIC array won't reference this slot.
|
||
}
|
||
|
||
public void Draw(
|
||
ICamera camera,
|
||
FrustumPlanes? frustum = null,
|
||
uint? neverCullLandblockId = null,
|
||
ReadOnlySpan<Vector4> clipPlanes = default,
|
||
Vector4? ndcClipAabb = null)
|
||
{
|
||
if (_alloc.LoadedCount == 0) return;
|
||
|
||
Matrix4x4 viewProjection = camera.View * camera.Projection;
|
||
|
||
// Build visible slot list with per-slot frustum cull.
|
||
_visibleSlots.Clear();
|
||
for (int slot = 0; slot < _slots.Length; slot++)
|
||
{
|
||
var data = _slots[slot];
|
||
if (data is null) continue;
|
||
if (frustum is not null && data.LandblockId != neverCullLandblockId)
|
||
{
|
||
if (!FrustumCuller.IsAabbVisible(frustum.Value, data.AabbMin, data.AabbMax))
|
||
continue;
|
||
}
|
||
_visibleSlots.Add(slot);
|
||
CollectVisibleCells(
|
||
_visibleCellIds,
|
||
data.LandblockId,
|
||
data.WorldOrigin,
|
||
data.AabbMin.Z,
|
||
data.AabbMax.Z,
|
||
frustum,
|
||
viewProjection,
|
||
clipPlanes,
|
||
ndcClipAabb);
|
||
}
|
||
if (_visibleSlots.Count == 0) return;
|
||
ActivateNextIndirectBuffer();
|
||
|
||
// Build DEIC array.
|
||
if (_deicScratch.Length < _visibleSlots.Count)
|
||
_deicScratch = new DrawElementsIndirectCommand[Math.Max(_visibleSlots.Count, 64)];
|
||
for (int i = 0; i < _visibleSlots.Count; i++)
|
||
{
|
||
var data = _slots[_visibleSlots[i]]!;
|
||
_deicScratch[i] = new DrawElementsIndirectCommand
|
||
{
|
||
Count = (uint)data.IndexCount,
|
||
InstanceCount = 1u,
|
||
FirstIndex = data.FirstIndex,
|
||
BaseVertex = 0, // baked into indices on upload
|
||
BaseInstance = 0,
|
||
};
|
||
}
|
||
|
||
// Grow indirect buffer if needed.
|
||
if (_visibleSlots.Count > _indirectCapacity)
|
||
{
|
||
int grownCapacity = Math.Max(64, _visibleSlots.Count * 2);
|
||
TrackedGlResource.AllocateBufferStorage(
|
||
_gl,
|
||
GLEnum.DrawIndirectBuffer,
|
||
_indirectBuffer,
|
||
checked((long)_indirectCapacity * sizeof(DrawElementsIndirectCommand)),
|
||
checked((long)grownCapacity * sizeof(DrawElementsIndirectCommand)),
|
||
GLEnum.DynamicDraw,
|
||
"growing terrain indirect command buffer");
|
||
_indirectCapacity = grownCapacity;
|
||
}
|
||
|
||
// Upload DEIC array.
|
||
fixed (DrawElementsIndirectCommand* p = _deicScratch)
|
||
{
|
||
TrackedGlResource.UpdateBufferSubData(
|
||
_gl,
|
||
GLEnum.DrawIndirectBuffer,
|
||
_indirectBuffer,
|
||
0,
|
||
checked((long)_visibleSlots.Count * sizeof(DrawElementsIndirectCommand)),
|
||
p,
|
||
"uploading terrain indirect commands");
|
||
}
|
||
PersistIndirectCapacity();
|
||
|
||
// Bind shader + uniforms + atlas handles.
|
||
// Verified Phase W Stage 4 (T4.2): terrain projects from the camera view-proj;
|
||
// no separate landscape viewpoint to sync. uViewProjection derives from
|
||
// the ICamera passed into this method — the same camera used for all other
|
||
// renderers in the unified pipeline. Retail's LScape::update_viewpoint
|
||
// pre-positions terrain to the outdoor landcell, but acdream uses the
|
||
// unified camera matrix everywhere, so no separate viewpoint divergence can occur.
|
||
_shader.Use();
|
||
UploadTextureTilingOnce();
|
||
// Campaign V slice V6f-2: bind the tiling UBO every draw, not once. GL's
|
||
// uniform-buffer binding points are global and shared with the sky's
|
||
// params block and the SceneLighting block, so a renderer that runs
|
||
// between two terrain draws can take binding 3 out from under us.
|
||
// Self-contained state, per feedback_render_self_contained_gl_state.
|
||
_gl.BindBufferBase(
|
||
BufferTargetARB.UniformBuffer,
|
||
Gpu.GpuBindingModel.UniformTerrainTiling,
|
||
_tilingUbo);
|
||
// Campaign V slice V6f-1: one uViewProjection, matching the field
|
||
// GpuPushConstants already carries, instead of the separate uView and
|
||
// uProjection the shader used to combine per vertex. viewProjection is
|
||
// the same product the visibility pass above already computed.
|
||
_shader.SetMatrix4("uViewProjection", viewProjection);
|
||
|
||
var (terrainHandle, alphaHandle) = _atlas.GetBindlessHandles();
|
||
// Campaign V slice V2b: pass each handle's binding=9 table slot
|
||
// instead of the raw uvec2 handle. GLSL reconstructs
|
||
// sampler2DArray(ACDREAM_TEXTURE_HANDLE(uTextureIndexA)) at the use
|
||
// site — see terrain_modern.frag.
|
||
uint terrainSlot = _textureTable.GetOrAdd(terrainHandle);
|
||
uint alphaSlot = _textureTable.GetOrAdd(alphaHandle);
|
||
FlushAndBindTextureTable();
|
||
_gl.ProgramUniform1(_shader.Program, _uTextureIndexALoc, terrainSlot);
|
||
_gl.ProgramUniform1(_shader.Program, _uTextureIndexBLoc, alphaSlot);
|
||
|
||
// Phase U.3: bind the terrain clip UBO (binding=2). Shared ClipFrame UBO
|
||
// when wired, else the no-clip fallback (count 0 = ungated terrain).
|
||
BindClipUboBinding2();
|
||
|
||
// #108-residual: retail terrain is SINGLE-SIDED — ACRender::landPolysDraw
|
||
// (0x006b7040) draws each land triangle ONLY when the camera is on the
|
||
// POSITIVE (upper) side of its plane (Plane::which_side2 vs
|
||
// Render::FrameCurrent, zFightTerrainAdjust bias). GL backface culling
|
||
// evaluates the same per-triangle eye-side predicate at rasterization.
|
||
// LandblockMesh emits every triangle CCW in world XY seen from above
|
||
// (LandblockMeshTests winding pin), which the unified camera chain
|
||
// (CreateLookAt up=+Z + Numerics perspective) maps to CCW window
|
||
// winding from above / CW from below (TerrainCullOrientationTests) —
|
||
// so FrontFace(Ccw)+Cull(Back) keeps the top side and culls the
|
||
// underside. WB drew the whole world with culling DISABLED
|
||
// frame-globally (WB GameScene.cs:841 — an editor camera goes
|
||
// underground); inheriting that drew terrain DOUBLE-SIDED, and a
|
||
// below-grade eye (cellar ascent) saw the UNDERSIDE of the grade
|
||
// sheet through the exit-door aperture — the #108 grass window.
|
||
// Self-contained state per feedback_render_self_contained_gl_state;
|
||
// the frame-global CW + cull-off baseline is restored after the draw.
|
||
_gl.Enable(EnableCap.CullFace);
|
||
_gl.CullFace(TriangleFace.Back);
|
||
_gl.FrontFace(FrontFaceDirection.Ccw);
|
||
|
||
_gl.BindVertexArray(_globalVao);
|
||
_gl.MemoryBarrier(MemoryBarrierMask.CommandBarrierBit);
|
||
_gl.MultiDrawElementsIndirect(
|
||
PrimitiveType.Triangles, DrawElementsType.UnsignedInt,
|
||
(void*)0,
|
||
(uint)_visibleSlots.Count,
|
||
(uint)sizeof(DrawElementsIndirectCommand));
|
||
_gl.BindVertexArray(0);
|
||
_gl.BindBuffer(GLEnum.DrawIndirectBuffer, 0);
|
||
|
||
_gl.FrontFace(FrontFaceDirection.CW);
|
||
_gl.Disable(EnableCap.CullFace);
|
||
}
|
||
|
||
public void Dispose()
|
||
{
|
||
if (_disposed)
|
||
return;
|
||
_retirementLedger.RetryPendingPublications();
|
||
|
||
if (_disposeResources is null)
|
||
{
|
||
var releases = new List<(string Name, Action Release)>();
|
||
if (_globalVao != 0)
|
||
{
|
||
RetryableGpuResourceRelease release =
|
||
TrackedGlResource.CreateRetryableVertexArrayDeletion(
|
||
_gl,
|
||
_globalVao,
|
||
"deleting terrain global VAO");
|
||
releases.Add(("global-vao", release.Run));
|
||
}
|
||
if (_globalVbo != 0)
|
||
{
|
||
RetryableGpuResourceRelease release =
|
||
TrackedGlResource.CreateRetryableBufferDeletion(
|
||
_gl,
|
||
_globalVbo,
|
||
_globalVboCapacityBytes,
|
||
"deleting terrain global vertex buffer");
|
||
releases.Add(("global-vbo", release.Run));
|
||
}
|
||
if (_globalEbo != 0)
|
||
{
|
||
RetryableGpuResourceRelease release =
|
||
TrackedGlResource.CreateRetryableBufferDeletion(
|
||
_gl,
|
||
_globalEbo,
|
||
_globalEboCapacityBytes,
|
||
"deleting terrain global index buffer");
|
||
releases.Add(("global-ebo", release.Run));
|
||
}
|
||
for (int frame = 0; frame < _indirectBuffersByFrame.Length; frame++)
|
||
{
|
||
List<DynamicIndirectBuffer> frameBuffers = _indirectBuffersByFrame[frame];
|
||
for (int index = 0; index < frameBuffers.Count; index++)
|
||
{
|
||
DynamicIndirectBuffer buffer = frameBuffers[index];
|
||
RetryableGpuResourceRelease release =
|
||
TrackedGlResource.CreateRetryableBufferDeletion(
|
||
_gl,
|
||
buffer.Buffer,
|
||
checked((long)buffer.Capacity * sizeof(DrawElementsIndirectCommand)),
|
||
"deleting terrain indirect command buffer");
|
||
releases.Add(($"indirect-{frame}-{index}", release.Run));
|
||
}
|
||
}
|
||
if (_fallbackClipUbo != 0)
|
||
{
|
||
RetryableGpuResourceRelease release =
|
||
TrackedGlResource.CreateRetryableBufferDeletion(
|
||
_gl,
|
||
_fallbackClipUbo,
|
||
ClipFrame.TerrainUboBytes,
|
||
"deleting terrain fallback clip UBO");
|
||
releases.Add(("fallback-clip-ubo", release.Run));
|
||
}
|
||
if (_tilingUbo != 0)
|
||
{
|
||
RetryableGpuResourceRelease release =
|
||
TrackedGlResource.CreateRetryableBufferDeletion(
|
||
_gl,
|
||
_tilingUbo,
|
||
TerrainTextureTilingTable.UniformBufferBytes,
|
||
"deleting terrain tiling UBO");
|
||
releases.Add(("tiling-ubo", release.Run));
|
||
}
|
||
if (_textureTableSsbo != 0)
|
||
{
|
||
RetryableGpuResourceRelease release =
|
||
TrackedGlResource.CreateRetryableBufferDeletion(
|
||
_gl,
|
||
_textureTableSsbo,
|
||
_textureTableSsboCapacityBytes,
|
||
"deleting terrain texture-table SSBO");
|
||
releases.Add(("texture-table", release.Run));
|
||
}
|
||
_disposeResources = new RetryableResourceReleaseLedger(releases);
|
||
}
|
||
|
||
ResourceReleaseAttempt attempt = _disposeResources.Advance();
|
||
if (!_disposeResources.IsComplete)
|
||
{
|
||
throw attempt.ToException(
|
||
"One or more terrain GPU resources could not be released.");
|
||
}
|
||
|
||
_globalVao = 0;
|
||
_globalVbo = 0;
|
||
_globalEbo = 0;
|
||
_globalVboCapacityBytes = 0;
|
||
_globalEboCapacityBytes = 0;
|
||
foreach (List<DynamicIndirectBuffer> frameBuffers in _indirectBuffersByFrame)
|
||
frameBuffers.Clear();
|
||
_indirectBuffer = 0;
|
||
_indirectCapacity = 0;
|
||
_dynamicFrameStarted = false;
|
||
_fallbackClipUbo = 0;
|
||
_textureTableSsbo = 0;
|
||
_textureTableSsboCapacityBytes = 0;
|
||
_disposeResources = null;
|
||
_disposed = true;
|
||
|
||
if (attempt.HasFailures)
|
||
{
|
||
throw attempt.ToException(
|
||
"Terrain GPU resources released with exceptional committed outcomes.");
|
||
}
|
||
}
|
||
|
||
// ----------------------------------------------------------------
|
||
// Private helpers
|
||
// ----------------------------------------------------------------
|
||
|
||
/// <summary>
|
||
/// Upload the texture-array adapter for retail's per-surface repeat count.
|
||
/// Retail passes <c>TerrainTex::tex_tiling</c> directly to
|
||
/// <c>ImgTex::TileCSI</c> / <c>ImgTex::MergeTexture</c>
|
||
/// (`TexMerge::CopyAndTile` 0x00503580, `TexMerge::Merge` 0x005038C0).
|
||
/// Uniform values persist for the lifetime of this linked shader program,
|
||
/// so the immutable atlas table is uploaded on its first bound draw.
|
||
/// </summary>
|
||
private void UploadTextureTilingOnce()
|
||
{
|
||
if (_textureTilingUploaded)
|
||
return;
|
||
|
||
if (_atlas.TilingByLayer.Count != TerrainTextureTilingTable.LayerCapacity)
|
||
{
|
||
throw new InvalidOperationException(
|
||
$"Terrain tiling table has {_atlas.TilingByLayer.Count} entries; " +
|
||
$"expected {TerrainTextureTilingTable.LayerCapacity}.");
|
||
}
|
||
|
||
// Campaign V slice V6f-2: one whole-buffer write into the binding=3
|
||
// uniform buffer, replacing the glUniform1fv into the loose array. The
|
||
// block is std140, so each value sits at a 16-byte stride with three
|
||
// dead words after it; the span is cleared first so those words are
|
||
// zero rather than whatever the stack held.
|
||
Span<byte> block = stackalloc byte[TerrainTextureTilingTable.UniformBufferBytes];
|
||
block.Clear();
|
||
for (int i = 0; i < TerrainTextureTilingTable.LayerCapacity; i++)
|
||
{
|
||
BitConverter.TryWriteBytes(
|
||
block[(i * TerrainTextureTilingTable.UniformElementStrideBytes)..],
|
||
_atlas.TilingByLayer[i]);
|
||
}
|
||
|
||
fixed (byte* p = block)
|
||
{
|
||
TrackedGlResource.UpdateBufferSubData(
|
||
_gl,
|
||
BufferTargetARB.UniformBuffer,
|
||
_tilingUbo,
|
||
0,
|
||
TerrainTextureTilingTable.UniformBufferBytes,
|
||
p,
|
||
"uploading terrain tiling UBO");
|
||
}
|
||
|
||
_textureTilingUploaded = true;
|
||
}
|
||
|
||
/// <summary>
|
||
/// Campaign V slice V2b: uploads <see cref="_textureTable"/>'s handles to
|
||
/// <see cref="_textureTableSsbo"/> when a new one was registered since the
|
||
/// last flush, then (re)binds it at
|
||
/// <see cref="GpuBindingModel.StorageTextureTable"/>. Terrain registers at
|
||
/// most two handles per draw (the terrain and alpha atlases), so this is
|
||
/// dirty only on the atlas's first draw and stays clean afterward.
|
||
/// </summary>
|
||
private unsafe void FlushAndBindTextureTable()
|
||
{
|
||
if (_textureTable.Dirty)
|
||
{
|
||
ReadOnlySpan<ulong> handles = _textureTable.Handles;
|
||
int byteCount = handles.Length * sizeof(ulong);
|
||
fixed (ulong* p = handles)
|
||
{
|
||
if (_textureTableSsboCapacityBytes < byteCount)
|
||
{
|
||
int grown = DynamicBufferCapacity.Grow(_textureTableSsboCapacityBytes, byteCount);
|
||
TrackedGlResource.AllocateBufferStorage(
|
||
_gl,
|
||
GLEnum.ShaderStorageBuffer,
|
||
_textureTableSsbo,
|
||
_textureTableSsboCapacityBytes,
|
||
grown,
|
||
GLEnum.DynamicDraw,
|
||
"growing terrain texture-table SSBO");
|
||
_textureTableSsboCapacityBytes = grown;
|
||
}
|
||
_gl.BindBuffer(GLEnum.ShaderStorageBuffer, _textureTableSsbo);
|
||
_gl.BufferSubData(GLEnum.ShaderStorageBuffer, 0, (nuint)byteCount, p);
|
||
}
|
||
_textureTable.MarkFlushed();
|
||
}
|
||
_gl.BindBufferBase(
|
||
GLEnum.ShaderStorageBuffer,
|
||
GpuBindingModel.StorageTextureTable,
|
||
_textureTableSsbo);
|
||
}
|
||
|
||
/// <summary>
|
||
/// Phase U.3: bind the terrain clip UBO to binding=2. Prefers the shared
|
||
/// <see cref="ClipFrame"/> UBO range (<see cref="SetClipUbo"/>); otherwise lazily
|
||
/// creates + binds a no-clip fallback (count 0 = ungated) so the shader never
|
||
/// reads an unbound UBO. The fallback is std140-sized to
|
||
/// <see cref="ClipFrame.TerrainUboBytes"/> and zero-filled (count 0).
|
||
/// </summary>
|
||
private void BindClipUboBinding2()
|
||
{
|
||
if (_sharedClipBinding.IsValid)
|
||
{
|
||
_sharedClipBinding.Bind(_gl);
|
||
return;
|
||
}
|
||
|
||
if (_fallbackClipUbo == 0)
|
||
{
|
||
var zero = stackalloc byte[ClipFrame.TerrainUboBytes];
|
||
for (int i = 0; i < ClipFrame.TerrainUboBytes; i++) zero[i] = 0;
|
||
uint fallback = TrackedGlResource.CreateBuffer(
|
||
_gl,
|
||
"creating terrain fallback clip UBO");
|
||
try
|
||
{
|
||
TrackedGlResource.AllocateBufferStorage(
|
||
_gl,
|
||
BufferTargetARB.UniformBuffer,
|
||
fallback,
|
||
0,
|
||
ClipFrame.TerrainUboBytes,
|
||
BufferUsageARB.DynamicDraw,
|
||
zero,
|
||
"allocating terrain fallback clip UBO");
|
||
_fallbackClipUbo = fallback;
|
||
}
|
||
catch
|
||
{
|
||
TrackedGlResource.DeleteBuffer(
|
||
_gl,
|
||
fallback,
|
||
0,
|
||
"rolling back terrain fallback clip UBO");
|
||
throw;
|
||
}
|
||
}
|
||
_gl.BindBufferBase(BufferTargetARB.UniformBuffer,
|
||
ClipFrame.TerrainClipUboBinding, _fallbackClipUbo);
|
||
}
|
||
|
||
private void AllocateGpuBuffers(int capacitySlots)
|
||
{
|
||
long vboBytes = checked((long)capacitySlots * VertsPerLandblock * VertexSize);
|
||
long eboBytes = checked((long)capacitySlots * IndicesPerLandblock * IndexSize);
|
||
|
||
TrackedGlResource.AllocateBufferStorage(
|
||
_gl,
|
||
BufferTargetARB.ArrayBuffer,
|
||
_globalVbo,
|
||
_globalVboCapacityBytes,
|
||
vboBytes,
|
||
BufferUsageARB.DynamicDraw,
|
||
"allocating terrain global vertex storage");
|
||
_globalVboCapacityBytes = vboBytes;
|
||
|
||
TrackedGlResource.AllocateBufferStorage(
|
||
_gl,
|
||
BufferTargetARB.ElementArrayBuffer,
|
||
_globalEbo,
|
||
_globalEboCapacityBytes,
|
||
eboBytes,
|
||
BufferUsageARB.DynamicDraw,
|
||
"allocating terrain global index storage");
|
||
_globalEboCapacityBytes = eboBytes;
|
||
}
|
||
|
||
private void ConfigureVao(uint vao, uint vbo, uint ebo)
|
||
{
|
||
_gl.BindVertexArray(vao);
|
||
_gl.BindBuffer(BufferTargetARB.ArrayBuffer, vbo);
|
||
_gl.BindBuffer(BufferTargetARB.ElementArrayBuffer, ebo);
|
||
|
||
uint stride = (uint)VertexSize;
|
||
|
||
// location 0: Position
|
||
_gl.EnableVertexAttribArray(0);
|
||
_gl.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, stride, (void*)0);
|
||
// location 1: Normal
|
||
_gl.EnableVertexAttribArray(1);
|
||
_gl.VertexAttribPointer(1, 3, VertexAttribPointerType.Float, false, stride, (void*)(3 * sizeof(float)));
|
||
// locations 2-5: Data0..Data3 (uvec4 byte attributes)
|
||
nint dataOffset = 6 * sizeof(float);
|
||
_gl.EnableVertexAttribArray(2);
|
||
_gl.VertexAttribIPointer(2, 4, VertexAttribIType.UnsignedByte, stride, (void*)dataOffset);
|
||
_gl.EnableVertexAttribArray(3);
|
||
_gl.VertexAttribIPointer(3, 4, VertexAttribIType.UnsignedByte, stride, (void*)(dataOffset + 4));
|
||
_gl.EnableVertexAttribArray(4);
|
||
_gl.VertexAttribIPointer(4, 4, VertexAttribIType.UnsignedByte, stride, (void*)(dataOffset + 8));
|
||
_gl.EnableVertexAttribArray(5);
|
||
_gl.VertexAttribIPointer(5, 4, VertexAttribIType.UnsignedByte, stride, (void*)(dataOffset + 12));
|
||
|
||
_gl.BindVertexArray(0);
|
||
GLHelpers.ThrowOnResourceError(_gl, "configuring terrain VAO");
|
||
}
|
||
|
||
internal static void CollectVisibleCells(
|
||
HashSet<uint> destination,
|
||
uint landblockId,
|
||
Vector3 worldOrigin,
|
||
float zMin,
|
||
float zMax,
|
||
FrustumPlanes? frustum,
|
||
Matrix4x4 viewProjection,
|
||
ReadOnlySpan<Vector4> clipPlanes,
|
||
Vector4? ndcClipAabb = null)
|
||
{
|
||
ArgumentNullException.ThrowIfNull(destination);
|
||
const float cellSize = AcDream.Core.Physics.TerrainSurface.CellSize;
|
||
const int cellsPerSide = AcDream.Core.Physics.TerrainSurface.CellsPerSide;
|
||
uint prefix = landblockId & 0xFFFF0000u;
|
||
|
||
for (int cellX = 0; cellX < cellsPerSide; cellX++)
|
||
{
|
||
float minX = worldOrigin.X + cellX * cellSize;
|
||
float maxX = minX + cellSize;
|
||
for (int cellY = 0; cellY < cellsPerSide; cellY++)
|
||
{
|
||
float minY = worldOrigin.Y + cellY * cellSize;
|
||
float maxY = minY + cellSize;
|
||
var cellMin = new Vector3(minX, minY, zMin);
|
||
var cellMax = new Vector3(maxX, maxY, zMax);
|
||
if (frustum is not null
|
||
&& !FrustumCuller.IsAabbVisible(frustum.Value, cellMin, cellMax))
|
||
{
|
||
continue;
|
||
}
|
||
|
||
// Retail publishes landcell in_view from the clipped landscape
|
||
// view, not merely from the camera frustum. The modern renderer
|
||
// expresses each doorway slice as homogeneous clip-space planes
|
||
// plus its scissor AABB; use both products here so particle
|
||
// simulation follows the same visible terrain slice as the GPU.
|
||
if (!IsAabbVisibleThroughClipRegion(
|
||
cellMin,
|
||
cellMax,
|
||
viewProjection,
|
||
clipPlanes,
|
||
ndcClipAabb))
|
||
{
|
||
continue;
|
||
}
|
||
|
||
uint low = AcDream.Core.Physics.TerrainSurface.ComputeOutdoorCellLowId(
|
||
cellX * cellSize,
|
||
cellY * cellSize);
|
||
destination.Add(prefix | low);
|
||
}
|
||
}
|
||
}
|
||
|
||
private static bool IsAabbVisibleThroughClipRegion(
|
||
Vector3 min,
|
||
Vector3 max,
|
||
Matrix4x4 viewProjection,
|
||
ReadOnlySpan<Vector4> clipPlanes,
|
||
Vector4? ndcClipAabb)
|
||
{
|
||
Vector4 aabb = ndcClipAabb.GetValueOrDefault();
|
||
bool hasScissorConstraint = ndcClipAabb.HasValue
|
||
&& (aabb.X > -1f || aabb.Y > -1f || aabb.Z < 1f || aabb.W < 1f);
|
||
if (clipPlanes.IsEmpty && !hasScissorConstraint)
|
||
return true;
|
||
|
||
Span<Vector4> clipCorners = stackalloc Vector4[8];
|
||
for (int corner = 0; corner < clipCorners.Length; corner++)
|
||
{
|
||
var world = new Vector4(
|
||
(corner & 1) == 0 ? min.X : max.X,
|
||
(corner & 2) == 0 ? min.Y : max.Y,
|
||
(corner & 4) == 0 ? min.Z : max.Z,
|
||
1f);
|
||
clipCorners[corner] = Vector4.Transform(world, viewProjection);
|
||
}
|
||
|
||
for (int planeIndex = 0; planeIndex < clipPlanes.Length; planeIndex++)
|
||
{
|
||
if (IsAabbOutsideHomogeneousPlane(clipCorners, clipPlanes[planeIndex]))
|
||
{
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (!hasScissorConstraint)
|
||
return true;
|
||
|
||
Span<Vector4> scissorPlanes = stackalloc Vector4[4]
|
||
{
|
||
new( 1f, 0f, 0f, -aabb.X),
|
||
new(-1f, 0f, 0f, aabb.Z),
|
||
new( 0f, 1f, 0f, -aabb.Y),
|
||
new( 0f, -1f, 0f, aabb.W),
|
||
};
|
||
for (int planeIndex = 0; planeIndex < scissorPlanes.Length; planeIndex++)
|
||
{
|
||
if (IsAabbOutsideHomogeneousPlane(clipCorners, scissorPlanes[planeIndex]))
|
||
{
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
private static bool IsAabbOutsideHomogeneousPlane(
|
||
ReadOnlySpan<Vector4> clipCorners,
|
||
Vector4 plane)
|
||
{
|
||
// A linear half-space reaches its maximum over the transformed AABB at
|
||
// one of the eight corners. If every corner is negative, no point in
|
||
// the cell box can survive this GPU clip plane.
|
||
for (int corner = 0; corner < clipCorners.Length; corner++)
|
||
{
|
||
if (Vector4.Dot(plane, clipCorners[corner]) >= 0f)
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
private void EnsureCapacity(int newCapacity)
|
||
{
|
||
if (newCapacity <= _alloc.Capacity)
|
||
return;
|
||
|
||
var grownSlots = new SlotData?[newCapacity];
|
||
Array.Copy(_slots, grownSlots, _slots.Length);
|
||
|
||
long newVboBytes = checked((long)newCapacity * VertsPerLandblock * VertexSize);
|
||
long newEboBytes = checked((long)newCapacity * IndicesPerLandblock * IndexSize);
|
||
uint newVbo = 0;
|
||
uint newEbo = 0;
|
||
uint newVao = 0;
|
||
long allocatedNewVboBytes = 0;
|
||
long allocatedNewEboBytes = 0;
|
||
bool published = false;
|
||
try
|
||
{
|
||
newVbo = TrackedGlResource.CreateBuffer(
|
||
_gl,
|
||
"creating grown terrain vertex buffer");
|
||
TrackedGlResource.AllocateBufferStorage(
|
||
_gl,
|
||
BufferTargetARB.ArrayBuffer,
|
||
newVbo,
|
||
0,
|
||
newVboBytes,
|
||
BufferUsageARB.DynamicDraw,
|
||
"allocating grown terrain vertex buffer");
|
||
allocatedNewVboBytes = newVboBytes;
|
||
|
||
newEbo = TrackedGlResource.CreateBuffer(
|
||
_gl,
|
||
"creating grown terrain index buffer");
|
||
TrackedGlResource.AllocateBufferStorage(
|
||
_gl,
|
||
BufferTargetARB.ElementArrayBuffer,
|
||
newEbo,
|
||
0,
|
||
newEboBytes,
|
||
BufferUsageARB.DynamicDraw,
|
||
"allocating grown terrain index buffer");
|
||
allocatedNewEboBytes = newEboBytes;
|
||
|
||
GLHelpers.ThrowOnResourceError(_gl, "copying terrain buffers (precondition)");
|
||
_gl.BindBuffer(BufferTargetARB.CopyReadBuffer, _globalVbo);
|
||
_gl.BindBuffer(BufferTargetARB.CopyWriteBuffer, newVbo);
|
||
_gl.CopyBufferSubData(
|
||
CopyBufferSubDataTarget.CopyReadBuffer,
|
||
CopyBufferSubDataTarget.CopyWriteBuffer,
|
||
0,
|
||
0,
|
||
checked((nuint)_globalVboCapacityBytes));
|
||
_gl.BindBuffer(BufferTargetARB.CopyReadBuffer, _globalEbo);
|
||
_gl.BindBuffer(BufferTargetARB.CopyWriteBuffer, newEbo);
|
||
_gl.CopyBufferSubData(
|
||
CopyBufferSubDataTarget.CopyReadBuffer,
|
||
CopyBufferSubDataTarget.CopyWriteBuffer,
|
||
0,
|
||
0,
|
||
checked((nuint)_globalEboCapacityBytes));
|
||
GLHelpers.ThrowOnResourceError(_gl, "copying terrain buffers");
|
||
|
||
newVao = TrackedGlResource.CreateVertexArray(
|
||
_gl,
|
||
"creating grown terrain VAO");
|
||
ConfigureVao(newVao, newVbo, newEbo);
|
||
|
||
uint oldVao = _globalVao;
|
||
uint oldVbo = _globalVbo;
|
||
uint oldEbo = _globalEbo;
|
||
long oldVboBytes = _globalVboCapacityBytes;
|
||
long oldEboBytes = _globalEboCapacityBytes;
|
||
|
||
_globalVao = newVao;
|
||
_globalVbo = newVbo;
|
||
_globalEbo = newEbo;
|
||
_globalVboCapacityBytes = newVboBytes;
|
||
_globalEboCapacityBytes = newEboBytes;
|
||
_slots = grownSlots;
|
||
_alloc.GrowTo(newCapacity);
|
||
published = true;
|
||
|
||
// Older submitted draws captured the former VAO/buffer bindings.
|
||
// Retire the complete old set only after the replacement is valid.
|
||
RetryableGpuResourceRelease oldVaoRelease =
|
||
TrackedGlResource.CreateRetryableVertexArrayDeletion(
|
||
_gl,
|
||
oldVao,
|
||
"retiring terrain VAO after growth");
|
||
RetryableGpuResourceRelease oldVboRelease =
|
||
TrackedGlResource.CreateRetryableBufferDeletion(
|
||
_gl,
|
||
oldVbo,
|
||
oldVboBytes,
|
||
"retiring terrain vertex buffer after growth");
|
||
RetryableGpuResourceRelease oldEboRelease =
|
||
TrackedGlResource.CreateRetryableBufferDeletion(
|
||
_gl,
|
||
oldEbo,
|
||
oldEboBytes,
|
||
"retiring terrain index buffer after growth");
|
||
_retirementLedger.RetireMany(
|
||
[oldVaoRelease, oldVboRelease, oldEboRelease]);
|
||
}
|
||
finally
|
||
{
|
||
if (!published)
|
||
{
|
||
TrackedGlResource.DeleteVertexArray(
|
||
_gl,
|
||
newVao,
|
||
"rolling back grown terrain VAO");
|
||
TrackedGlResource.DeleteBuffer(
|
||
_gl,
|
||
newVbo,
|
||
allocatedNewVboBytes,
|
||
"rolling back grown terrain vertex buffer");
|
||
TrackedGlResource.DeleteBuffer(
|
||
_gl,
|
||
newEbo,
|
||
allocatedNewEboBytes,
|
||
"rolling back grown terrain index buffer");
|
||
}
|
||
}
|
||
}
|
||
|
||
private sealed class SlotData
|
||
{
|
||
public uint LandblockId;
|
||
public Vector3 WorldOrigin;
|
||
public uint FirstIndex;
|
||
public int IndexCount;
|
||
public Vector3 AabbMin;
|
||
public Vector3 AabbMax;
|
||
}
|
||
}
|