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>
22 lines
820 B
C#
22 lines
820 B
C#
using Friflo.Engine.ECS;
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using Microsoft.Xna.Framework;
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namespace MrGameEng.Lighting;
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/// <summary>
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/// A point light: an entity with this component plus a <see cref="MrGameEng.Graphics.Transform2D"/>
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/// adds light around its world position, attenuating to zero at <see cref="Radius"/> and casting
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/// grid-traced shadows behind occluders. Picked up by the lighting system into the lightmap.
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/// </summary>
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public struct PointLight : IComponent
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{
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/// <summary>Reach of the light in world units (light fades to zero at this distance).</summary>
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public float Radius;
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/// <summary>Light tint (reserved for colored lights; intensity currently drives brightness).</summary>
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public Color Color;
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/// <summary>Peak brightness added at the light's centre (0..1+).</summary>
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public float Intensity;
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}
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