feat: PBR point light — Unity-style attenuation, warm glow

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- UBO expanded from 64 to 128 bytes: vp(64) + lightPos(16) + lightColor(16)
- Vertex shader: passes point light UBO data through
- Fragment shader: refactored calcLight() function, shared by directional + point
  - Point light: Unity-style attenuation pow(1 - dist/range, 2)
  - Directional light reduced intensity (0.4) to balance with point light
  - Point light: position (0,8,0), warm color (1,0.9,0.7), intensity 15, range 25
- Renderer: reads Light component from ECS, packs into UBO with Marshal.StructureToPtr
- Scene: MainLight entity with Light.Point at (0,8,0)
- 0 C# struct changes — pure UBO layout + shader upgrade

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emil28092005

2026-06-18 19:23:00 +03:00

parent 22748ed9ba

commit f718e6de49

7 changed files with 77 additions and 25 deletions

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src/Engine.Graphics.Vulkan/Shaders/triangle.vert.spv

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