Leonid PershinandClaude Opus 4.8
79d406a9f4
CI / build-test (push) Successful in 1m14s
Extend the Lighting module with a per-cell lightmap. LightmapBuilder (pure, tested) fills an ambient base, shades occluder cells, and adds point lights that attenuate with distance and are blocked by occluders between source and cell (grid-traced soft shadows). Lightmap holds the grid plus a greyscale texture (Upload) and a bilinear SampleAt for the simulation; a PointLight component places lights in the world. LightmapSystem rebuilds the grid a few times a second (ambient from the day/night cycle with a night floor, occluders from a game-supplied grid, point lights from the ECS); LightmapRenderSystem multiplies the lightmap over the world after the sprite flush and under the HUD. Wired via scene.UseLighting(...), sampled through Lighting.SampleAt. Docs updated. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
70 lines
2.0 KiB
C#
70 lines
2.0 KiB
C#
using MrGameEng.Lighting;
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using Xunit;
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namespace MrGameEng.Lighting.Tests;
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public class LightmapBuilderTests
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{
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private static float[] Build(
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int width,
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int height,
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float ambient,
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bool[] occluders,
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params LightSample[] lights
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)
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{
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var light = new float[width * height];
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LightmapBuilder.Build(light, width, height, ambient, occluders, lights);
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return light;
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}
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[Fact]
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public void Ambient_WithoutOccluders_IsUniform()
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{
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var light = Build(4, 4, 0.6f, new bool[16]);
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Assert.All(light, v => Assert.Equal(0.6f, v, 5));
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}
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[Fact]
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public void OccluderCell_IsDarkerThanOpenCell()
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{
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var occ = new bool[9];
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occ[4] = true; // centre cell shaded
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var light = Build(3, 3, 0.8f, occ);
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Assert.True(light[4] < light[0]);
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Assert.Equal(0.8f * LightmapBuilder.OccluderShade, light[4], 5);
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}
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[Fact]
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public void PointLight_IsBrighterNearSourceAndFadesToRadius()
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{
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var light = Build(7, 1, 0f, new bool[7], new LightSample(0, 0, 6f, 1f));
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Assert.True(light[0] > light[2] && light[2] > light[5]);
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Assert.InRange(light[6], 0f, 0.01f); // на радиусе свет угасает
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}
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[Fact]
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public void Occluder_CastsShadowBehindIt()
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{
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var occ = new bool[7];
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occ[3] = true; // препятствие между источником (0) и дальними клетками
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var light = Build(7, 1, 0f, occ, new LightSample(0, 0, 10f, 1f));
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Assert.True(light[1] > 0f); // перед препятствием — освещено
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Assert.Equal(0f, light[5], 5); // за препятствием — тень
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}
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[Fact]
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public void Values_StayWithinUnitRange()
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{
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var light = Build(
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5,
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5,
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0.5f,
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new bool[25],
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new LightSample(2, 2, 4f, 2f) // яркий свет — проверяем клампинг
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);
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Assert.All(light, v => Assert.InRange(v, 0f, 1f));
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}
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}
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