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debug: fragment shader outputs light position as color — test UBO

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- If objects are colored (not black/artifacts), UBO data reaches fragment shader
- Also: manual float-by-float UBO packing instead of MemoryCopy
- vp matrix packed as M11..M44 (row-major, no row_major in GLSL = transpose)
This commit is contained in:
emil28092005
2026-06-18 19:36:57 +03:00
parent ff8bec00f6
commit e37e7a4eed
3 changed files with 13 additions and 26 deletions
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src/Engine.Graphics.Vulkan/VulkanRenderer.cs
+7 -15
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@@ -102,21 +102,13 @@ internal sealed unsafe class VulkanRenderer : IRenderer, Engine.Graphics.IScreen
// Pack UBO: mat4 vp (64 bytes) + vec4 lightPos (16) + vec4 lightColor (16) = 96 bytes
var uboData = stackalloc byte[128];
{
var vpCopy = vp;
var src = &vpCopy;
System.Buffer.MemoryCopy(src, uboData, 64, 64);
}
{
var lpCopy = lightPos;
var src = &lpCopy;
System.Buffer.MemoryCopy(src, uboData + 64, 16, 16);
}
{
var lcCopy = lightColor;
var src = &lcCopy;
System.Buffer.MemoryCopy(src, uboData + 80, 16, 16);
}
var pFloat = (float*)uboData;
pFloat[0] = vp.M11; pFloat[1] = vp.M12; pFloat[2] = vp.M13; pFloat[3] = vp.M14;
pFloat[4] = vp.M21; pFloat[5] = vp.M22; pFloat[6] = vp.M23; pFloat[7] = vp.M24;
pFloat[8] = vp.M31; pFloat[9] = vp.M32; pFloat[10] = vp.M33; pFloat[11] = vp.M34;
pFloat[12] = vp.M41; pFloat[13] = vp.M42; pFloat[14] = vp.M43; pFloat[15] = vp.M44;
pFloat[16] = lightPos.X; pFloat[17] = lightPos.Y; pFloat[18] = lightPos.Z; pFloat[19] = lightPos.W;
pFloat[20] = lightColor.X; pFloat[21] = lightColor.Y; pFloat[22] = lightColor.Z; pFloat[23] = lightColor.W;
var drawCalls = new List<(VkBuffer vertexBuf, VkBuffer indexBuf, uint indexCount, Matrix4x4 model)>();