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Fix AE001H cyclic color blending

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This commit is contained in:
gamer147
2026-07-11 22:21:10 -04:00
parent f195934324
commit b41ae36168
8 changed files with 140 additions and 36 deletions
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40
engine/Age.Engine.Tests/AnimInterpolatorTests.cs
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@@ -45,17 +45,43 @@ public class AnimInterpolatorTests
}
[Fact]
public void ColorAnim_PingPongsTintStrength_ObjectStaysOpaque()
public void ColorAnim_Mode0Textured_UsesRgbModulationAndIgnoresAlpha()
{
var g = VisibleObj(0x100);
// base = no tint (strength 0); target = full-strength (alpha 0xff) red glow => strength pulses 0<->255
g.SetColorAnim(0x100, period: 1000, target: GfxState.PackColor(0xFF, 0xFF0000));
g.SetColorAnim(0x100, period: 1000, target: GfxState.PackColor(0x80, 0xFF0000));
g.SnapshotVisibleObjects(0); // seeds start=0
var baseFrame = g.SnapshotVisibleObjects(0).Single();
Assert.Equal(255, baseFrame.Alpha); // object opacity ALWAYS opaque (never the color alpha)
Assert.Equal(0, baseFrame.TintStrength); // t=0 -> no tint
var peak = g.SnapshotVisibleObjects(500).Single();
Assert.Equal(255, peak.Alpha); // still opaque
Assert.Equal(255, peak.TintStrength); // t=1 -> full tint strength (the glow peak)
Assert.Equal((255, 0xffffffL, 0, true),
(baseFrame.Alpha, baseFrame.Tint, baseFrame.TintStrength, baseFrame.MultiplyTint));
Assert.Equal((255, 0xff0000L, 0, true),
(peak.Alpha, peak.Tint, peak.TintStrength, peak.MultiplyTint));
}
[Fact]
public void ColorAnim_Mode1_UsesSampledAlphaAsOpacity()
{
var g = VisibleObj(0x100);
g.SetStaticObjectColorResolved(0x100, mode: 1, alpha: 255, rgb: 0xffffff);
g.SetColorAnim(0x100, period: 1000, target: GfxState.PackColor(0x80, 0xffffff));
g.SnapshotVisibleObjects(0);
var peak = g.SnapshotVisibleObjects(500).Single();
Assert.Equal(0x80, peak.Alpha);
Assert.Equal(0, peak.TintStrength);
Assert.True(peak.MultiplyTint);
}
[Fact]
public void Ae001hMode0AlphaCycle_IsVisuallyInert()
{
var g = VisibleObj(0x100);
g.SetColorAnimResolved(0x100, period: 1200, alpha: 224, rgb: -1);
var start = g.SnapshotVisibleObjects(1000).Single();
var peak = g.SnapshotVisibleObjects(1600).Single();
Assert.Equal(0xe0ffffff, g.TryGet(0x100)!.ColorTarget);
Assert.Equal((255, 0xffffffL, 0, true),
(start.Alpha, start.Tint, start.TintStrength, start.MultiplyTint));
Assert.Equal((start.Alpha, start.Tint, start.TintStrength, start.MultiplyTint),
(peak.Alpha, peak.Tint, peak.TintStrength, peak.MultiplyTint));
}
}