emil28092005
c82ff48119
- Shadow mapping via rlgl: custom depth FBO (2048x2048, 24-bit depth texture) instead of color-attachment approach. Proper depth-only render pass. - Shadow map bound via MaterialMapIndex.Emission (texture unit 1), sampled in shadow receiver shader with PCF 3x3 soft shadows. - Fixed inverted normals: Cross(ac, ab) for CW winding in OBJ files. - Linear workflow: pow(albedo, 2.2) before lighting, pow(result, 1/2.2) after. - Per-channel Fresnel: vec3 F0 + (1-F0)*pow(1-HdotV,5) instead of F0.x. - Single CollectLights call after BeginMode3D. - Shadow pass after BeginDrawing (inside frame). - Backface culling disabled globally for mixed-winding meshes. - Point light support: Light.Point/Directional factory methods, attenuation, ImGui inspector with type combo, position/range for point lights. - Floor rendered for both light types (shadow receiver or main shader). - 66/66 tests passing.
27 lines
802 B
C#
27 lines
802 B
C#
using System.Numerics;
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namespace Engine.Graphics;
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/// <summary>
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/// Shared mesh math utilities used by loaders and procedural generators.
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/// </summary>
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public static class MeshMath
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{
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/// <summary>
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/// Compute a flat face normal from three vertex positions.
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/// Falls back to Vector3.UnitY for degenerate (zero-area) triangles.
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/// </summary>
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public static Vector3 ComputeFaceNormal(Vector3 a, Vector3 b, Vector3 c)
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{
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var ab = b - a;
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var ac = c - a;
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// Cross(ac, ab) instead of Cross(ab, ac) to match CW winding in typical OBJ files
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var normal = Vector3.Cross(ac, ab);
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if (normal.LengthSquared() > 0.00001f)
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normal = Vector3.Normalize(normal);
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else
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normal = Vector3.UnitY;
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return normal;
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}
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}
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