0f099bb652
Ports retail's raw->interpreted motion normalization and routes the local player's velocity through it, so backward/strafe come from the retail source instead of hand-mirrored controller code (retires register TS-22 + UN-5). MotionInterpreter (decomp-verbatim, Ghidra/ACE-cross-checked): - adjust_motion (0x00528010): WalkBackward->WalkForward (x-0.649999976), TurnLeft->TurnRight (x-1), SideStepLeft->SideStepRight (x-1), sidestep scale 0.5*(WalkAnimSpeed/SidestepAnimSpeed), RunForward early-return, per-channel holdkey fallback to CurrentHoldKey. - apply_run_to_command (0x00527be0): WalkForward->RunForward when speed>0 + UNCONDITIONAL *runRate; TurnRight *1.5; SideStepRight *runRate clamp +/-3.0. - apply_raw_movement (0x005287e0): copy raw->interpreted, adjust the 3 channels with per-channel hold keys. - WalkAnimSpeed unified to the retail-exact 3.11999989f (was 3.12f). PlayerMovementController: build ONE RawMotionState from MovementInput at forward_speed=1.0 (apply_run_to_command applies the run rate — a pre-scaled speed would double-scale), run apply_raw_movement, then take grounded + jump velocity straight from get_state_velocity (now correct for all directions) and drive the keyboard turn omega from the interpreted turn_speed (BaseTurnRate x turn_speed = the same pi/2 formula the remote path uses; numerically identical to the old TurnRateFor). Deleted the hand-mirrored backward(x-0.65) / strafe(x+-1.25) formulas in both the grounded and jump blocks. Mouse turn and the auto-walk path are untouched. Retail-faithful behavior changes (confirm in smoke): strafe is now 1.25 * ~1.248 * runRate = ~1.56*runRate, clamped via SideStepSpeed<=3.0 so |v.X|<=3.75 (was 1.25*runRate, no scale/clamp); backward is unchanged (3.12*0.65*runRate); backward/strafe-left velocity now comes from the pipeline instead of returning zero. Forward run pace unchanged (4.0*runRate). Tests: MotionNormalizationTests (17, adjust_motion/apply_run_to_command) + MotionVelocityPipelineTests (10, apply_raw_movement->get_state_velocity golden velocities incl. the strafe clamp + turn speeds). Full suite green (3255). Register: TS-22 + UN-5 deleted (retired); TS-34 added (adjust_motion creature guard is a no-op — IWeenieObject has no IsCreature; correct for the only caller, the player). Pseudocode: docs/research/2026-07-01-d6-motion-interp-pseudocode.md. NEXT D6.2b: the echo-gated wire forward_speed=1.0 question (evidence suggests ACE relays rather than recomputes; verified via the smoke echo). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
299 lines
10 KiB
C#
299 lines
10 KiB
C#
using AcDream.Core.Physics;
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using Xunit;
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namespace AcDream.Core.Tests.Physics;
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// ─────────────────────────────────────────────────────────────────────────────
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// MotionNormalizationTests — Phase D6.1: adjust_motion + apply_run_to_command.
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//
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// Source addresses tested (docs/research/2026-07-01-d6-motion-interp-pseudocode.md):
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// FUN_00528010 (0x00528010) CMotionInterp::adjust_motion
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// FUN_00527be0 (0x00527be0) CMotionInterp::apply_run_to_command
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//
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// Golden constants (retail, verified against ACE MotionInterp.cs byte-for-byte):
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// BackwardsFactor = 0.649999976 (0x007c8910)
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// WalkAnimSpeed = 3.11999989 (0x007c891c, retail-exact — NOT 3.12f)
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// SidestepAnimSpeed = 1.25
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// SidestepFactor = 0.5
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// RunTurnFactor = 1.5
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// MaxSidestepAnimRate = 3.0
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// ─────────────────────────────────────────────────────────────────────────────
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/// <summary>
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/// Fake WeenieObject for injecting a known run rate into apply_run_to_command /
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/// adjust_motion without a real weenie.
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/// </summary>
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file sealed class FakeRunRateWeenie : IWeenieObject
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{
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public float RunRate;
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public bool InqRunRateResult = true;
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public bool InqJumpVelocity(float extent, out float vz)
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{
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vz = 0f;
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return false;
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}
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public bool InqRunRate(out float rate)
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{
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rate = RunRate;
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return InqRunRateResult;
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}
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public bool CanJump(float extent) => true;
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}
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public sealed class MotionNormalizationTests
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{
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// Retail-exact sidestep scale: SidestepFactor(0.5) * (3.11999989 / 1.25) ≈ 1.24799995...
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private const float SidestepScale = 0.5f * (3.11999989f / MotionInterpreter.SidestepAnimSpeed);
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private static MotionInterpreter MakeInterp(IWeenieObject? weenie = null)
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{
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return new MotionInterpreter { WeenieObj = weenie };
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}
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// ── adjust_motion: per-command remap + scale ─────────────────────────────
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[Fact]
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public void AdjustMotion_WalkBackward_RemapsToWalkForward_NegatesAndScalesSpeed()
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{
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// 0x00528010: WalkBackwards -> cmd = WalkForward; speed *= -BackwardsFactor
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var interp = MakeInterp();
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uint motion = MotionCommand.WalkBackward;
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float speed = 1.0f;
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interp.adjust_motion(ref motion, ref speed, HoldKey.None);
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Assert.Equal(MotionCommand.WalkForward, motion);
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Assert.Equal(-MotionInterpreter.BackwardsFactor, speed, 5);
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Assert.Equal(-0.649999976f, speed, 5);
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}
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[Fact]
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public void AdjustMotion_TurnLeft_RemapsToTurnRight_NegatesSpeed()
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{
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var interp = MakeInterp();
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uint motion = MotionCommand.TurnLeft;
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float speed = 1.0f;
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interp.adjust_motion(ref motion, ref speed, HoldKey.None);
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Assert.Equal(MotionCommand.TurnRight, motion);
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Assert.Equal(-1.0f, speed, 5);
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}
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[Fact]
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public void AdjustMotion_SideStepLeft_RemapsToSideStepRight_NegatesBeforeScale()
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{
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// Negate happens BEFORE the ×1.248 sidestep scale, so the net factor is -1.248.
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var interp = MakeInterp();
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uint motion = MotionCommand.SideStepLeft;
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float speed = 1.0f;
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interp.adjust_motion(ref motion, ref speed, HoldKey.None);
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Assert.Equal(MotionCommand.SideStepRight, motion);
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Assert.Equal(-SidestepScale, speed, 5);
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Assert.Equal(-1.24799995f, speed, 4);
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}
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[Fact]
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public void AdjustMotion_SideStepRight_ScalesSpeed_NoNegate()
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{
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var interp = MakeInterp();
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uint motion = MotionCommand.SideStepRight;
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float speed = 1.0f;
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interp.adjust_motion(ref motion, ref speed, HoldKey.None);
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Assert.Equal(MotionCommand.SideStepRight, motion);
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Assert.Equal(SidestepScale, speed, 5);
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Assert.Equal(1.24799995f, speed, 4);
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}
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[Fact]
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public void AdjustMotion_RunForward_EarlyReturns_NoScaleNoHoldKeyPath()
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{
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// GOTCHA: RunForward returns immediately -- no scale AND no holdkey promotion,
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// even when holdKey == Run (there's nothing left to promote it to, but the
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// early-return also means speed is untouched).
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var interp = MakeInterp(new FakeRunRateWeenie { RunRate = 2.94f });
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uint motion = MotionCommand.RunForward;
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float speed = 1.0f;
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interp.adjust_motion(ref motion, ref speed, HoldKey.Run);
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Assert.Equal(MotionCommand.RunForward, motion);
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Assert.Equal(1.0f, speed, 5);
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}
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[Fact]
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public void AdjustMotion_NonSidestepNonTurnNonForward_Unchanged_ExceptHoldKeyPath()
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{
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// Ready is not one of the switch cases and not SideStepRight after remap,
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// so command/speed pass through unchanged when holdKey doesn't promote it.
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var interp = MakeInterp();
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uint motion = MotionCommand.Ready;
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float speed = 1.0f;
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interp.adjust_motion(ref motion, ref speed, HoldKey.None);
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Assert.Equal(MotionCommand.Ready, motion);
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Assert.Equal(1.0f, speed, 5);
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}
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// ── adjust_motion: holdKey inheritance + Run promotion ───────────────────
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[Fact]
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public void AdjustMotion_HoldKeyInvalid_FallsBackToCurrentHoldKey_PromotesWalkForwardWhenRun()
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{
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var interp = MakeInterp();
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interp.CurrentHoldKey = HoldKey.Run;
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uint motion = MotionCommand.WalkForward;
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float speed = 1.0f;
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interp.adjust_motion(ref motion, ref speed, HoldKey.Invalid);
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// apply_run_to_command: WalkForward + speed>0 -> RunForward; speed *= speedMod (1.0, no weenie).
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Assert.Equal(MotionCommand.RunForward, motion);
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Assert.Equal(1.0f, speed, 5);
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}
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[Fact]
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public void AdjustMotion_HoldKeyNone_DoesNotPromote()
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{
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var interp = MakeInterp();
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interp.CurrentHoldKey = HoldKey.Run;
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uint motion = MotionCommand.WalkForward;
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float speed = 1.0f;
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interp.adjust_motion(ref motion, ref speed, HoldKey.None);
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Assert.Equal(MotionCommand.WalkForward, motion);
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Assert.Equal(1.0f, speed, 5);
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}
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[Fact]
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public void AdjustMotion_HoldKeyRunPassedDirectly_PromotesWalkForward()
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{
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var interp = MakeInterp(new FakeRunRateWeenie { RunRate = 2.75f });
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uint motion = MotionCommand.WalkForward;
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float speed = 1.0f;
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interp.adjust_motion(ref motion, ref speed, HoldKey.Run);
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Assert.Equal(MotionCommand.RunForward, motion);
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Assert.Equal(2.75f, speed, 5);
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}
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// ── apply_run_to_command ──────────────────────────────────────────────────
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[Fact]
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public void ApplyRunToCommand_WalkForward_PositiveSpeed_PromotesToRunForward_ScalesByRunRate()
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{
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var interp = MakeInterp(new FakeRunRateWeenie { RunRate = 2.94f });
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uint motion = MotionCommand.WalkForward;
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float speed = 1.0f;
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interp.apply_run_to_command(ref motion, ref speed);
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Assert.Equal(MotionCommand.RunForward, motion);
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Assert.Equal(2.94f, speed, 5);
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}
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[Fact]
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public void ApplyRunToCommand_WalkForward_NegativeSpeed_StaysWalkForward_ScalesUnconditionally()
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{
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// GOTCHA: speed *= speedMod is UNCONDITIONAL -- backward (negative speed)
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// still gets run-scaled even though it is NOT promoted to RunForward.
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var interp = MakeInterp(new FakeRunRateWeenie { RunRate = 2.94f });
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uint motion = MotionCommand.WalkForward;
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float speed = -0.649999976f;
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interp.apply_run_to_command(ref motion, ref speed);
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Assert.Equal(MotionCommand.WalkForward, motion);
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Assert.Equal(-0.649999976f * 2.94f, speed, 4);
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}
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[Fact]
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public void ApplyRunToCommand_TurnRight_ScalesByRunTurnFactor_NoRunRateNoClamp()
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{
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var interp = MakeInterp(new FakeRunRateWeenie { RunRate = 2.94f });
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uint motion = MotionCommand.TurnRight;
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float speed = 1.0f;
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interp.apply_run_to_command(ref motion, ref speed);
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Assert.Equal(MotionCommand.TurnRight, motion);
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Assert.Equal(1.5f, speed, 5);
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}
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[Fact]
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public void ApplyRunToCommand_SideStepRight_BelowClamp_ScalesByRunRate()
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{
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var interp = MakeInterp(new FakeRunRateWeenie { RunRate = 2.0f });
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uint motion = MotionCommand.SideStepRight;
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float speed = 1.0f;
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interp.apply_run_to_command(ref motion, ref speed);
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Assert.Equal(MotionCommand.SideStepRight, motion);
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Assert.Equal(2.0f, speed, 5);
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}
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[Fact]
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public void ApplyRunToCommand_SideStepRight_AbovePositiveClamp_ClampsToPositiveMax()
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{
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// runRate 2.94 * speed 1.248 (post adjust_motion sidestep scale) ≈ 3.669 > 3.0
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var interp = MakeInterp(new FakeRunRateWeenie { RunRate = 2.94f });
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uint motion = MotionCommand.SideStepRight;
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float speed = 1.24799995f;
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interp.apply_run_to_command(ref motion, ref speed);
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Assert.Equal(MotionCommand.SideStepRight, motion);
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Assert.Equal(3.0f, speed, 5);
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}
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[Fact]
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public void ApplyRunToCommand_SideStepRight_AboveNegativeClamp_ClampsToNegativeMax()
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{
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var interp = MakeInterp(new FakeRunRateWeenie { RunRate = 2.94f });
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uint motion = MotionCommand.SideStepRight;
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float speed = -1.24799995f;
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interp.apply_run_to_command(ref motion, ref speed);
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Assert.Equal(MotionCommand.SideStepRight, motion);
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Assert.Equal(-3.0f, speed, 5);
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}
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[Fact]
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public void ApplyRunToCommand_UsesMyRunRate_WhenInqRunRateFails()
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{
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var weenie = new FakeRunRateWeenie { RunRate = 999f, InqRunRateResult = false };
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var interp = MakeInterp(weenie);
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interp.MyRunRate = 1.5f;
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uint motion = MotionCommand.WalkForward;
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float speed = 1.0f;
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interp.apply_run_to_command(ref motion, ref speed);
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Assert.Equal(MotionCommand.RunForward, motion);
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Assert.Equal(1.5f, speed, 5);
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}
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[Fact]
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public void ApplyRunToCommand_NoWeenie_SpeedModDefaultsToOne()
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{
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var interp = MakeInterp(weenie: null);
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uint motion = MotionCommand.SideStepRight;
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float speed = 1.0f;
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interp.apply_run_to_command(ref motion, ref speed);
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Assert.Equal(1.0f, speed, 5);
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}
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}
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