a144e87318
UpdateMotion now parses TurnToObject (mt 8: guid, standalone wire heading, 3-dword UnPackNet) and TurnToHeading (mt 9: 3-dword UnPackNet) into a new TurnToPathData sibling record (the two wire forms genuinely diverge - 7-dword move UnPackNet with Origin head vs 3-dword turn UnPackNet with guid+heading head; every consumer switches on MovementType first, so no polymorphic shape was invented). mt 6/7 exposure widened additively so ALL UnPackNet fields reach MovementParameters.FromWire. The mt=0 motionFlags sticky-guid trailer (bit 0x1) is parsed for cursor honesty and carried unconsumed until R5 - scoped to mt=0 ONLY per both ACE's writer (MovementInvalid.Write) and the decomp's case-0 read, tighter than the plan sketched; the StandingLongJump bit (0x2) doc-noted as the R5 unpack_movement item. MoveToRunRate doc-pointered as the V4/V5 MyRunRate write. 11 new golden-byte tests hand-assembled from ACE's writers (MovementData/TurnToObject/TurnToParameters/TurnToHeading/ MoveToParameters/MovementInvalid) incl. flag-permutation round-trips and the trailer cursor-honesty case; the existing 12 mt 6/7 fixtures pass unchanged. Full suite: 3,972 passed. Implemented by a dedicated agent against the V0-pinned spec (P6 order confirmed exactly); scope + suite independently verified. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
718 lines
36 KiB
C#
718 lines
36 KiB
C#
using System;
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using System.Buffers.Binary;
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using AcDream.Core.Net.Messages;
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using AcDream.Core.Physics.Motion;
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using Xunit;
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namespace AcDream.Core.Net.Tests.Messages;
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/// <summary>
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/// Covers <see cref="UpdateMotion.TryParse"/> — the 0xF74C GameMessage the
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/// server sends when an entity's motion state changes (NPC starts walking,
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/// creature enters combat, door opens, etc). The parser shares the inner
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/// MovementData decoder with CreateObject but reaches it through a
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/// different outer layout, so we need standalone coverage.
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/// </summary>
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public class UpdateMotionTests
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{
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[Fact]
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public void RejectsWrongOpcode()
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{
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var body = new byte[32];
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BinaryPrimitives.WriteUInt32LittleEndian(body, 0xDEADBEEFu);
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Assert.Null(UpdateMotion.TryParse(body));
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}
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[Fact]
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public void RejectsTruncated()
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{
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Assert.Null(UpdateMotion.TryParse(new byte[3]));
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Assert.Null(UpdateMotion.TryParse(Array.Empty<byte>()));
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}
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[Fact]
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public void ParsesStanceOnly_WhenForwardCommandFlagUnset()
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{
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// Layout:
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// u32 opcode = 0xF74C
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// u32 guid
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// u16 instanceSeq
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// u16 movementSeq + u16 serverControlSeq + u8 isAutonomous + 1 pad (= 6 bytes total header, per ACE Align())
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// u8 movementType = 0 (Invalid)
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// u8 motionFlags = 0
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// u16 currentStyle (outer MovementData field) = 0x0042
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// u32 packed = CurrentStyle flag (0x1) only
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// u16 inner currentStyle = 0x0005 (overrides outer per InterpretedMotionState semantics)
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var body = new byte[4 + 4 + 2 + 6 + 4 + 4 + 2];
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int p = 0;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x12345678u); p += 4;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0001); p += 2;
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// 8-byte header slot — leave zero
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p += 6;
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body[p++] = 0; // movementType = Invalid
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body[p++] = 0; // motionFlags
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0042); p += 2;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x1u); p += 4; // flags = CurrentStyle only
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0005); p += 2;
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var result = UpdateMotion.TryParse(body);
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Assert.NotNull(result);
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Assert.Equal(0x12345678u, result!.Value.Guid);
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Assert.Equal((ushort)0x0005, result.Value.MotionState.Stance);
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Assert.Null(result.Value.MotionState.ForwardCommand);
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}
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[Fact]
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public void ParsesStanceAndForwardCommand()
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{
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// Flags = CurrentStyle (0x1) | ForwardCommand (0x2)
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var body = new byte[4 + 4 + 2 + 6 + 4 + 4 + 2 + 2];
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int p = 0;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xABCDEF01u); p += 4;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0010); p += 2;
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p += 6; // MovementData header slot
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body[p++] = 0;
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body[p++] = 0;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0000); p += 2; // outer style = 0
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x3u); p += 4; // CurrentStyle + ForwardCommand
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x000D); p += 2; // stance = 0xD
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0007); p += 2; // forward command = 0x7 (Run)
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var result = UpdateMotion.TryParse(body);
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Assert.NotNull(result);
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Assert.Equal(0xABCDEF01u, result!.Value.Guid);
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Assert.Equal((ushort)0x000D, result.Value.MotionState.Stance);
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Assert.Equal((ushort)0x0007, result.Value.MotionState.ForwardCommand);
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}
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[Fact]
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public void ParsesNoFlagsSet_KeepsOuterStance()
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{
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// When the InterpretedMotionState flags are zero, neither the inner
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// currentStyle nor the forward command are present in the payload,
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// so the parser should fall back to the MovementData outer stance
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// field and leave ForwardCommand null.
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var body = new byte[4 + 4 + 2 + 6 + 4 + 4];
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int p = 0;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x55555555u); p += 4;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
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p += 6;
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body[p++] = 0;
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body[p++] = 0;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x00AA); p += 2;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0u); p += 4; // no flags
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var result = UpdateMotion.TryParse(body);
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Assert.NotNull(result);
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Assert.Equal((ushort)0x00AA, result!.Value.MotionState.Stance);
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Assert.Null(result.Value.MotionState.ForwardCommand);
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}
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[Fact]
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public void ParsesForwardSpeed_WhenSpeedFlagSet()
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{
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// Flags = CurrentStyle | ForwardCommand | ForwardSpeed
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// = 0x1 | 0x2 | 0x4 = 0x7
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// (Per ACE MovementStateFlag enum — ForwardSpeed is bit 0x4,
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// NOT 0x10. The earlier test had the wrong mapping; see
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// references/ACE/Source/ACE.Entity/Enum/MovementStateFlag.cs)
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// Test value: 1.5× speed — matches a typical RunRate broadcast.
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var body = new byte[4 + 4 + 2 + 6 + 4 + 4 + 2 + 2 + 4];
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int p = 0;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x1A2B3C4Du); p += 4;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
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p += 6; // MovementData header
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body[p++] = 0;
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body[p++] = 0;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x7u); p += 4;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x003D); p += 2; // NonCombat
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0007); p += 2; // RunForward
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 1.5f); p += 4; // speed
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var result = UpdateMotion.TryParse(body);
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Assert.NotNull(result);
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Assert.Equal((ushort)0x003D, result!.Value.MotionState.Stance);
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Assert.Equal((ushort)0x0007, result.Value.MotionState.ForwardCommand);
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Assert.Equal(1.5f, result.Value.MotionState.ForwardSpeed);
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}
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[Fact]
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public void ParsesCommandsList_Wave()
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{
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// A typical NPC wave broadcast:
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// - stance NonCombat (0x003D)
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// - ForwardCommand flag set, command = 0x0003 (Ready)
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// - numCommands = 1, with a single MotionItem{ cmd=0x0087 Wave, seq=0, speed=1.0 }
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//
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// Packed u32 = (flags | numCommands << 7)
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// flags = 0x01 (CurrentStyle) | 0x02 (ForwardCommand) = 0x03
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// numCommands << 7 = 1 << 7 = 0x80
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// total = 0x83
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var body = new byte[4 + 4 + 2 + 6 + 4 + 4 + 2 + 2 + 8];
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int p = 0;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xDEADBEEFu); p += 4;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
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p += 6;
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body[p++] = 0;
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body[p++] = 0;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x83u); p += 4; // flags=0x3 + numCommands=1
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x003D); p += 2; // stance
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0003); p += 2; // fwd cmd = Ready
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// MotionItem: u16 command + u16 packedSeq + f32 speed
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0087); p += 2; // Wave
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0001); p += 2;
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 1.0f); p += 4;
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var result = UpdateMotion.TryParse(body);
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Assert.NotNull(result);
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Assert.Equal((ushort)0x003D, result!.Value.MotionState.Stance);
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Assert.Equal((ushort)0x0003, result.Value.MotionState.ForwardCommand);
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Assert.NotNull(result.Value.MotionState.Commands);
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Assert.Single(result.Value.MotionState.Commands!);
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var wave = result.Value.MotionState.Commands![0];
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Assert.Equal((ushort)0x0087, wave.Command);
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Assert.Equal(1.0f, wave.Speed);
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}
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[Fact]
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public void HandlesNonInvalidMovementType_GracefullyReturnsOuterStance()
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{
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// movementType != 0 means one of the Move* variants; a truncated
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// non-Invalid payload still returns the outer state.
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// The parser must still return a valid Parsed with the outer stance
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// and a null ForwardCommand rather than failing the whole message.
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var body = new byte[4 + 4 + 2 + 6 + 4];
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int p = 0;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x99999999u); p += 4;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
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p += 6;
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body[p++] = 7; // movementType = MoveToPosition (non-Invalid)
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body[p++] = 0;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x00CC); p += 2;
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var result = UpdateMotion.TryParse(body);
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Assert.NotNull(result);
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Assert.Equal((ushort)0x00CC, result!.Value.MotionState.Stance);
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Assert.Null(result.Value.MotionState.ForwardCommand);
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Assert.Equal((byte)7, result.Value.MotionState.MovementType);
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Assert.True(result.Value.MotionState.IsServerControlledMoveTo);
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}
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[Fact]
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public void ParsesMoveToPositionSpeedAndRunRate()
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{
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// Layout after MovementData's movementType/motionFlags/currentStyle:
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// Origin: cell + xyz (16 bytes)
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// MoveToParameters: flags, distance, min, fail, speed,
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// walk/run threshold, desired heading (28 bytes)
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// runRate: f32
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var body = new byte[4 + 4 + 2 + 6 + 4 + 16 + 28 + 4];
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int p = 0;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x80001234u); p += 4;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
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p += 6;
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body[p++] = 7; // MoveToPosition
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body[p++] = 0;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x003D); p += 2;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xA8B4000Eu); p += 4;
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 10f); p += 4;
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 20f); p += 4;
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 30f); p += 4;
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const uint canWalkCanRunMoveTowards = 0x1u | 0x2u | 0x200u;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), canWalkCanRunMoveTowards); p += 4;
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 0.6f); p += 4;
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 0.0f); p += 4;
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), float.MaxValue); p += 4;
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 1.25f); p += 4;
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 15.0f); p += 4;
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 90.0f); p += 4;
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 1.5f); p += 4;
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var result = UpdateMotion.TryParse(body);
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Assert.NotNull(result);
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Assert.Equal((byte)7, result!.Value.MotionState.MovementType);
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Assert.True(result.Value.MotionState.IsServerControlledMoveTo);
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Assert.Equal((ushort)0x003D, result.Value.MotionState.Stance);
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Assert.Null(result.Value.MotionState.ForwardCommand);
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Assert.Equal(canWalkCanRunMoveTowards, result.Value.MotionState.MoveToParameters);
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Assert.Equal(1.25f, result.Value.MotionState.MoveToSpeed);
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Assert.Equal(1.5f, result.Value.MotionState.MoveToRunRate);
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Assert.True(result.Value.MotionState.MoveToCanRun);
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Assert.True(result.Value.MotionState.MoveTowards);
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// Phase L.1c (2026-04-28): full path payload retained.
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Assert.NotNull(result.Value.MotionState.MoveToPath);
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var path = result.Value.MotionState.MoveToPath!.Value;
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Assert.Null(path.TargetGuid);
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Assert.Equal(0xA8B4000Eu, path.OriginCellId);
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Assert.Equal(10f, path.OriginX);
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Assert.Equal(20f, path.OriginY);
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Assert.Equal(30f, path.OriginZ);
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Assert.Equal(0.6f, path.DistanceToObject);
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Assert.Equal(0.0f, path.MinDistance);
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Assert.Equal(float.MaxValue, path.FailDistance);
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Assert.Equal(15.0f, path.WalkRunThreshold);
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Assert.Equal(90.0f, path.DesiredHeading);
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}
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[Fact]
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public void ParsesAttackHigh1_AsActionForwardCommand()
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{
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// Phase L.1c followup (2026-04-28): regression that verifies the
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// wire-format ACE uses for melee swings — mt=0 with
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// ForwardCommand=AttackHigh1 (0x0062 in low 16 bits) and
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// ForwardSpeed (typically the animSpeed). The receiver in
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// GameWindow.OnLiveMotionUpdated relies on this layout to bulk-copy
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// ForwardCommand into the body's InterpretedState so that
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// get_state_velocity returns 0 (gate is RunForward||WalkForward).
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var body = new byte[4 + 4 + 2 + 6 + 4 + 4 + 2 + 4];
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int p = 0;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x800003B5u); p += 4;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
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p += 6; // header padding
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body[p++] = 0; // mt = Invalid (interpreted)
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body[p++] = 0; // motion_flags
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x003C); p += 2; // stance: HandCombat
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// InterpretedMotionState: flags = ForwardCommand (0x02) | ForwardSpeed (0x04)
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x06u); p += 4;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0062); p += 2; // AttackHigh1 low bits
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 1.25f); p += 4; // animSpeed
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var result = UpdateMotion.TryParse(body);
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Assert.NotNull(result);
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Assert.Equal((byte)0, result!.Value.MotionState.MovementType);
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Assert.False(result.Value.MotionState.IsServerControlledMoveTo);
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Assert.Equal((ushort)0x0062, result.Value.MotionState.ForwardCommand);
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Assert.Equal(1.25f, result.Value.MotionState.ForwardSpeed);
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}
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[Fact]
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public void ParsesSequenceNumbersAndAutonomyFlag()
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{
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// L.2g S1 (DEV-6): the three staleness stamps + autonomy flag must
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// survive parsing — retail gates every 0xF74C on them
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// (INSTANCE_TS at dispatch, MOVEMENT_TS + SERVER_CONTROLLED_MOVE_TS
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// in CPhysics::SetObjectMovement 0x00509690, which also stores
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// last_move_was_autonomous).
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var body = new byte[4 + 4 + 2 + 6 + 4 + 4];
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int p = 0;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x50001234u); p += 4;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0102); p += 2; // instanceSeq
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0304); p += 2; // movementSeq
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0506); p += 2; // serverControlSeq
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body[p++] = 1; // isAutonomous
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p += 1; // Align(4) pad
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body[p++] = 0; // movementType = Invalid
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body[p++] = 0; // motionFlags
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x003D); p += 2; // outer stance
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0u); p += 4; // no IMS flags
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var result = UpdateMotion.TryParse(body);
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Assert.NotNull(result);
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Assert.Equal((ushort)0x0102, result!.Value.InstanceSequence);
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Assert.Equal((ushort)0x0304, result.Value.MovementSequence);
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Assert.Equal((ushort)0x0506, result.Value.ServerControlSequence);
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Assert.True(result.Value.IsAutonomous);
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}
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[Fact]
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public void ParsesMoveToObjectTargetGuidAndOrigin()
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{
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// Type 6 (MoveToObject) prepends a u32 target guid before the
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// standard Origin + MovementParameters + runRate payload.
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// Body size: 20 (header) + 4 (guid) + 16 (origin) + 28 (params) + 4 (runRate) = 72.
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var body = new byte[20 + 4 + 16 + 28 + 4];
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int p = 0;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x80004321u); p += 4;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
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p += 6; // MovementData header padding
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body[p++] = 6; // MoveToObject
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body[p++] = 0;
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BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x003D); p += 2;
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x80001234u); p += 4; // target guid
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BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xA8B4000Eu); p += 4; // cell
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BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 5f); p += 4; // origin x
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 6f); p += 4; // origin y
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 7f); p += 4; // origin z
|
||
|
||
const uint flags = 0x1u | 0x2u | 0x200u; // can_walk | can_run | move_towards
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), flags); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 0.6f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 0.0f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), float.MaxValue); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 1.0f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 15.0f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 1.57f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 1.25f); p += 4; // runRate
|
||
|
||
var result = UpdateMotion.TryParse(body);
|
||
|
||
Assert.NotNull(result);
|
||
Assert.Equal((byte)6, result!.Value.MotionState.MovementType);
|
||
Assert.True(result.Value.MotionState.IsServerControlledMoveTo);
|
||
Assert.NotNull(result.Value.MotionState.MoveToPath);
|
||
var path = result.Value.MotionState.MoveToPath!.Value;
|
||
Assert.Equal(0x80001234u, path.TargetGuid);
|
||
Assert.Equal(0xA8B4000Eu, path.OriginCellId);
|
||
Assert.Equal(5f, path.OriginX);
|
||
Assert.Equal(6f, path.OriginY);
|
||
Assert.Equal(7f, path.OriginZ);
|
||
Assert.Equal(1.25f, result.Value.MotionState.MoveToRunRate);
|
||
}
|
||
|
||
// ─────────────────────────────────────────────────────────────────
|
||
// R4-V3 (closes M7): mt 8 (TurnToObject) / mt 9 (TurnToHeading).
|
||
//
|
||
// Golden bytes assembled from ACE's own writers (V0-pins.md P6):
|
||
// MovementDataExtensions.Write (references/ACE/Source/ACE.Server/
|
||
// Network/Motion/MovementData.cs:184-229) writes the common header
|
||
// (movementType u8, motionFlags u8, currentStyle u16) then dispatches
|
||
// on MovementType to:
|
||
// TurnToObjectExtensions.Write (TurnToObject.cs:25-30):
|
||
// writer.WriteGuid(Target); // u32
|
||
// writer.Write(DesiredHeading); // f32 — the STANDALONE
|
||
// // "wire_heading" field
|
||
// writer.Write(TurnToParameters); // 3-dword UnPackNet form
|
||
// TurnToParametersExtensions.Write (TurnToParameters.cs:23-28):
|
||
// writer.Write((uint)MovementParams); // u32 bitfield
|
||
// writer.Write(Speed); // f32
|
||
// writer.Write(DesiredHeading); // f32 — TurnToParameters'
|
||
// // OWN desired_heading
|
||
// TurnToHeadingExtensions.Write (TurnToHeading.cs:18-21):
|
||
// writer.Write(TurnToParameters); // 3-dword UnPackNet form only
|
||
//
|
||
// P6's fixture caveat: ACE always populates field2 (TurnToObject.
|
||
// DesiredHeading) and field5 (TurnToParameters.DesiredHeading) from the
|
||
// SAME motion.DesiredHeading source, so a byte-faithful ACE capture
|
||
// would have field2 == field5. To prove the parser distinguishes the
|
||
// two fields by OFFSET (not by coincidentally-equal value), these
|
||
// fixtures hand-vary the two headings.
|
||
// ─────────────────────────────────────────────────────────────────
|
||
|
||
[Fact]
|
||
public void ParsesTurnToObject_GuidWireHeadingAndParams()
|
||
{
|
||
// Header (20 bytes) + guid (4) + wireHeading (4) + TurnToParameters (12) = 40.
|
||
var body = new byte[20 + 4 + 4 + 12];
|
||
int p = 0;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x80005678u); p += 4;
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
|
||
p += 6; // MovementData header padding
|
||
|
||
body[p++] = 8; // TurnToObject
|
||
body[p++] = 0; // motionFlags
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x003D); p += 2;
|
||
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x80009999u); p += 4; // target guid
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 42.0f); p += 4; // standalone wire_heading (field2)
|
||
|
||
const uint flags = 0x1u | 0x2u | 0x200u; // can_walk | can_run | move_towards
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), flags); p += 4; // TurnToParameters.bitfield
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 1.5f); p += 4; // TurnToParameters.speed
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 199.0f); p += 4; // TurnToParameters.desired_heading (field5) — DELIBERATELY != field2
|
||
|
||
var result = UpdateMotion.TryParse(body);
|
||
|
||
Assert.NotNull(result);
|
||
Assert.Equal((byte)8, result!.Value.MotionState.MovementType);
|
||
Assert.True(result.Value.MotionState.IsServerControlledTurnTo);
|
||
Assert.False(result.Value.MotionState.IsServerControlledMoveTo);
|
||
Assert.NotNull(result.Value.MotionState.TurnToPath);
|
||
|
||
var path = result.Value.MotionState.TurnToPath!.Value;
|
||
Assert.Equal(0x80009999u, path.TargetGuid);
|
||
Assert.Equal(42.0f, path.WireHeading); // field2 — distinguished by OFFSET
|
||
Assert.Equal(flags, path.Bitfield);
|
||
Assert.Equal(1.5f, path.Speed);
|
||
Assert.Equal(199.0f, path.DesiredHeading); // field5 — distinct from field2
|
||
|
||
// The consumer feeds this straight into FromWireTurnTo (App-layer,
|
||
// out of scope here) — verify the fixture is round-trippable.
|
||
var mp = MovementParameters.FromWireTurnTo(path.Bitfield, path.Speed, path.DesiredHeading);
|
||
Assert.True(mp.CanRun);
|
||
Assert.Equal(1.5f, mp.Speed);
|
||
Assert.Equal(199.0f, mp.DesiredHeading);
|
||
}
|
||
|
||
[Fact]
|
||
public void ParsesTurnToObject_UnresolvableFallback_BothHeadingsSurvivedDistinctly()
|
||
{
|
||
// Retail's degrade-to-TurnToHeading fallback (decomp §2f case 8) only
|
||
// fires when GetObjectA(object_id) == 0 — a runtime/consumer-side
|
||
// resolution the wire parser has no visibility into. The parser's
|
||
// job is just to expose BOTH heading fields so the (future) V4/V5
|
||
// consumer can implement: "if unresolvable, params.DesiredHeading =
|
||
// wireHeading, then degrade to TurnToHeading". Confirm both survive
|
||
// even when they'd trigger the fallback (i.e. even when they differ).
|
||
var body = new byte[20 + 4 + 4 + 12];
|
||
int p = 0;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x8000AAAAu); p += 4;
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
|
||
p += 6;
|
||
|
||
body[p++] = 8;
|
||
body[p++] = 0;
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
|
||
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xDEADBEEFu); p += 4; // unresolvable guid
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 270.0f); p += 4; // wire_heading — the fallback source
|
||
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x1u); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 1.0f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 0.0f); p += 4; // params.desired_heading (would be overwritten by wire_heading on fallback)
|
||
|
||
var result = UpdateMotion.TryParse(body);
|
||
|
||
Assert.NotNull(result);
|
||
var path = result!.Value.MotionState.TurnToPath!.Value;
|
||
Assert.Equal(0xDEADBEEFu, path.TargetGuid);
|
||
Assert.Equal(270.0f, path.WireHeading);
|
||
Assert.Equal(0.0f, path.DesiredHeading);
|
||
Assert.NotEqual(path.WireHeading, path.DesiredHeading);
|
||
}
|
||
|
||
[Fact]
|
||
public void ParsesTurnToHeading_ThreeDwordFormOnly_NoGuidOrWireHeading()
|
||
{
|
||
// Header (20 bytes) + TurnToParameters (12) = 32. No guid, no
|
||
// standalone heading field — TurnToHeadingExtensions.Write emits
|
||
// ONLY the 3-dword UnPackNet form (TurnToHeading.cs:18-21).
|
||
var body = new byte[20 + 12];
|
||
int p = 0;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x8000BBBBu); p += 4;
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
|
||
p += 6;
|
||
|
||
body[p++] = 9; // TurnToHeading
|
||
body[p++] = 0;
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x003D); p += 2;
|
||
|
||
const uint flags = 0x2u | 0x800u; // can_run | set_hold_key
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), flags); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 2.0f); p += 4; // speed
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 315.0f); p += 4; // desired_heading
|
||
|
||
var result = UpdateMotion.TryParse(body);
|
||
|
||
Assert.NotNull(result);
|
||
Assert.Equal((byte)9, result!.Value.MotionState.MovementType);
|
||
Assert.True(result.Value.MotionState.IsServerControlledTurnTo);
|
||
Assert.NotNull(result.Value.MotionState.TurnToPath);
|
||
|
||
var path = result.Value.MotionState.TurnToPath!.Value;
|
||
Assert.Null(path.TargetGuid);
|
||
Assert.Null(path.WireHeading);
|
||
Assert.Equal(flags, path.Bitfield);
|
||
Assert.Equal(2.0f, path.Speed);
|
||
Assert.Equal(315.0f, path.DesiredHeading);
|
||
}
|
||
|
||
[Theory]
|
||
[InlineData(0u)] // no flags
|
||
[InlineData(0x1u | 0x2u)] // can_walk | can_run
|
||
[InlineData(0x10u)] // can_charge (fast-path bit)
|
||
[InlineData(0x3FFFFu)] // every A4 bit through 0x20000
|
||
public void ParsesTurnToHeading_FlagPermutations_BitfieldRoundTrips(uint bitfield)
|
||
{
|
||
var body = new byte[20 + 12];
|
||
int p = 0;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x80001111u); p += 4;
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
|
||
p += 6;
|
||
|
||
body[p++] = 9;
|
||
body[p++] = 0;
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
|
||
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), bitfield); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 1.0f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 0.0f); p += 4;
|
||
|
||
var result = UpdateMotion.TryParse(body);
|
||
|
||
Assert.NotNull(result);
|
||
Assert.Equal(bitfield, result!.Value.MotionState.TurnToPath!.Value.Bitfield);
|
||
}
|
||
|
||
// ─────────────────────────────────────────────────────────────────
|
||
// R4-V3 deliverable B: mt 6/7 widened exposure. MoveToPathData already
|
||
// carries every UnPackNet field (V0/V1 shipped that); this proves the
|
||
// fixture round-trips end-to-end through MovementParameters.FromWire —
|
||
// i.e. that ALL seven UnPackNet fields (not just the three ad-hoc bool
|
||
// properties MoveToCanRun/MoveTowards/CanCharge) reach a consumer.
|
||
// ─────────────────────────────────────────────────────────────────
|
||
|
||
[Fact]
|
||
public void MoveToPositionPath_FeedsFromWire_AllSevenFieldsSurvive()
|
||
{
|
||
var body = new byte[20 + 16 + 28 + 4];
|
||
int p = 0;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x80002222u); p += 4;
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
|
||
p += 6;
|
||
|
||
body[p++] = 7; // MoveToPosition
|
||
body[p++] = 0;
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x003D); p += 2;
|
||
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xA8B4000Eu); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 11f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 22f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 33f); p += 4;
|
||
|
||
const uint flags = 0x1u | 0x2u | 0x4u | 0x8u | 0x10u | 0x200u | 0x400u; // incl. can_charge + use_spheres
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), flags); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 0.6f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 0.1f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 50.0f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 1.25f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 15.0f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 123.0f); p += 4;
|
||
BinaryPrimitives.WriteSingleLittleEndian(body.AsSpan(p), 2.75f); p += 4; // runRate
|
||
|
||
var result = UpdateMotion.TryParse(body);
|
||
Assert.NotNull(result);
|
||
var path = result!.Value.MotionState.MoveToPath!.Value;
|
||
|
||
var mp = MovementParameters.FromWire(
|
||
flags,
|
||
path.DistanceToObject,
|
||
path.MinDistance,
|
||
path.FailDistance,
|
||
result.Value.MotionState.MoveToSpeed!.Value,
|
||
path.WalkRunThreshold,
|
||
path.DesiredHeading);
|
||
|
||
Assert.True(mp.CanWalk);
|
||
Assert.True(mp.CanRun);
|
||
Assert.True(mp.CanSidestep);
|
||
Assert.True(mp.CanWalkBackwards);
|
||
Assert.True(mp.CanCharge);
|
||
Assert.True(mp.MoveTowards);
|
||
Assert.True(mp.UseSpheres);
|
||
Assert.Equal(0.6f, mp.DistanceToObject);
|
||
Assert.Equal(0.1f, mp.MinDistance);
|
||
Assert.Equal(50.0f, mp.FailDistance);
|
||
Assert.Equal(1.25f, mp.Speed);
|
||
Assert.Equal(15.0f, mp.WalkRunThreshhold);
|
||
Assert.Equal(123.0f, mp.DesiredHeading);
|
||
Assert.Equal(2.75f, result.Value.MotionState.MoveToRunRate);
|
||
}
|
||
|
||
// ─────────────────────────────────────────────────────────────────
|
||
// R4-V3 deliverable C: the 0xF74C motionFlags sticky-guid trailer
|
||
// (mt=0/Invalid only — ACE MovementInvalid.Write gates the trailing
|
||
// guid on MotionFlags.StickToObject 0x1; decomp §2f case 0
|
||
// @0052455d). Cursor-honesty test: bytes AFTER the trailer must still
|
||
// parse correctly (i.e. the trailer's 4 bytes were actually consumed,
|
||
// not left dangling / double-read).
|
||
// ─────────────────────────────────────────────────────────────────
|
||
|
||
[Fact]
|
||
public void ParsesStickyGuidTrailer_WhenMotionFlagsBitSet()
|
||
{
|
||
// motionFlags byte1&0x1 (StickToObject) set; InterpretedMotionState
|
||
// flags = 0 (no fields), so the sticky guid dword immediately
|
||
// follows the packed flags dword.
|
||
var body = new byte[4 + 4 + 2 + 6 + 4 + 4 + 4];
|
||
int p = 0;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x80003333u); p += 4;
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
|
||
p += 6;
|
||
|
||
body[p++] = 0; // movementType = Invalid
|
||
body[p++] = 0x1; // motionFlags = StickToObject
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x003D); p += 2;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0u); p += 4; // no IMS flags
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x80004444u); p += 4; // sticky object guid
|
||
|
||
var result = UpdateMotion.TryParse(body);
|
||
|
||
Assert.NotNull(result);
|
||
Assert.Equal(0x80004444u, result!.Value.MotionState.StickyObjectGuid);
|
||
}
|
||
|
||
[Fact]
|
||
public void SkipsStickyGuidTrailer_WhenMotionFlagsBitClear()
|
||
{
|
||
var body = new byte[4 + 4 + 2 + 6 + 4 + 4];
|
||
int p = 0;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x80005555u); p += 4;
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
|
||
p += 6;
|
||
|
||
body[p++] = 0; // movementType = Invalid
|
||
body[p++] = 0; // motionFlags = none
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x003D); p += 2;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0u); p += 4; // no IMS flags
|
||
|
||
var result = UpdateMotion.TryParse(body);
|
||
|
||
Assert.NotNull(result);
|
||
Assert.Null(result!.Value.MotionState.StickyObjectGuid);
|
||
}
|
||
|
||
[Fact]
|
||
public void ParsesStickyGuidTrailer_CursorHonesty_BytesAfterTrailerStillParseCorrectly()
|
||
{
|
||
// Sticky trailer with the ForwardCommand flag ALSO set, so there are
|
||
// bytes both BEFORE (forwardCommand u16) and the sticky dword AFTER
|
||
// the flags dword — the trailer must be read at the right offset
|
||
// (after ForwardCommand + its own 2-byte read), not glued onto the
|
||
// packed-flags dword itself. Cross-checks against ACE's actual field
|
||
// order: MovementInvalid.Write emits `State` (the whole
|
||
// InterpretedMotionState, incl. Commands list) THEN the sticky guid
|
||
// — decomp confirms the same order (UnPack first, sticky guid read
|
||
// after, r4-moveto-decomp.md:274-275).
|
||
var body = new byte[4 + 4 + 2 + 6 + 4 + 4 + 2 + 4];
|
||
int p = 0;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0xF74Cu); p += 4;
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x80006666u); p += 4;
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2;
|
||
p += 6;
|
||
|
||
body[p++] = 0; // movementType = Invalid
|
||
body[p++] = 0x1; // motionFlags = StickToObject
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0); p += 2; // outer stance
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x2u); p += 4; // IMS flags = ForwardCommand only
|
||
BinaryPrimitives.WriteUInt16LittleEndian(body.AsSpan(p), 0x0007); p += 2; // ForwardCommand = RunForward
|
||
BinaryPrimitives.WriteUInt32LittleEndian(body.AsSpan(p), 0x80007777u); p += 4; // sticky object guid — AFTER ForwardCommand
|
||
|
||
var result = UpdateMotion.TryParse(body);
|
||
|
||
Assert.NotNull(result);
|
||
Assert.Equal((ushort)0x0007, result!.Value.MotionState.ForwardCommand);
|
||
Assert.Equal(0x80007777u, result.Value.MotionState.StickyObjectGuid);
|
||
}
|
||
}
|