mirror of
https://github.com/Kelsidavis/WoWee.git
synced 2026-03-23 07:40:14 +00:00
9eeb9ce64d
Extends the WMO normal mapping/POM system to character M2 models with bone-skinned tangents. Auto-generates normal/height maps from diffuse textures using luminance→height, Sobel→normals (same algorithm as WMO). - Expand vertex buffer from M2Vertex (48B) to CharVertexGPU (56B) with tangent vec4 computed via Lengyel's method in setupModelBuffers() - Tangents are bone-transformed and Gram-Schmidt orthogonalized in the vertex shader, output as TBN for fragment shader consumption - Fragment shader gains POM ray marching, normal map blending, and LOD crossfade via dFdx/dFdy (identical to WMO shader) - Descriptor set 1 extended with binding 2 for normal/height sampler - Settings (enable, strength, POM quality) wired from game_screen.cpp to both WMO and character renderers via shared UI controls
63 lines
1.7 KiB
GLSL
63 lines
1.7 KiB
GLSL
#version 450
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layout(set = 0, binding = 0) uniform PerFrame {
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mat4 view;
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mat4 projection;
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mat4 lightSpaceMatrix;
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vec4 lightDir;
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vec4 lightColor;
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vec4 ambientColor;
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vec4 viewPos;
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vec4 fogColor;
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vec4 fogParams;
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vec4 shadowParams;
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};
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layout(push_constant) uniform Push {
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mat4 model;
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} push;
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layout(set = 2, binding = 0) readonly buffer BoneSSBO {
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mat4 bones[];
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};
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layout(location = 0) in vec3 aPos;
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layout(location = 1) in vec4 aBoneWeights;
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layout(location = 2) in ivec4 aBoneIndices;
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layout(location = 3) in vec3 aNormal;
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layout(location = 4) in vec2 aTexCoord;
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layout(location = 5) in vec4 aTangent;
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layout(location = 0) out vec3 FragPos;
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layout(location = 1) out vec3 Normal;
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layout(location = 2) out vec2 TexCoord;
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layout(location = 3) out vec3 Tangent;
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layout(location = 4) out vec3 Bitangent;
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void main() {
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mat4 skinMat = bones[aBoneIndices.x] * aBoneWeights.x
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+ bones[aBoneIndices.y] * aBoneWeights.y
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+ bones[aBoneIndices.z] * aBoneWeights.z
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+ bones[aBoneIndices.w] * aBoneWeights.w;
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vec4 skinnedPos = skinMat * vec4(aPos, 1.0);
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vec3 skinnedNorm = mat3(skinMat) * aNormal;
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vec3 skinnedTan = mat3(skinMat) * aTangent.xyz;
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vec4 worldPos = push.model * skinnedPos;
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mat3 modelMat3 = mat3(push.model);
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FragPos = worldPos.xyz;
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Normal = modelMat3 * skinnedNorm;
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TexCoord = aTexCoord;
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// Gram-Schmidt re-orthogonalize tangent w.r.t. normal
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vec3 N = normalize(Normal);
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vec3 T = normalize(modelMat3 * skinnedTan);
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T = normalize(T - dot(T, N) * N);
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vec3 B = cross(N, T) * aTangent.w;
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Tangent = T;
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Bitangent = B;
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gl_Position = projection * view * worldPos;
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}
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