1 files changed, 28 insertions, 9 deletions
diff --git a/assets/shaders/skinned_geometry.vert b/assets/shaders/skinned_geometry.vert
index 2021691..a610442 100644
--- a/assets/shaders/skinned_geometry.vert
+++ b/assets/shaders/skinned_geometry.vert
@@ -4,15 +4,24 @@
 layout(location = 0) in vec3 inPosition;
 layout(location = 1) in vec3 inNormal;
 layout(location = 2) in vec2 inTexCoords;
+layout(location = 3) in ivec4 inBoneIndices;
+layout(location = 4) in vec4 inWeights;
+
+const int MAX_BONES = 100;
+const int MAX_BONE_INFLUENCES = 4;
+
+uniform AnimData {
+    mat4 boneMatrices[MAX_BONES];
+} anim;
 
 uniform Camera {
-  mat4 view;
-  mat4 proj;
-  vec4 viewPos;
+    mat4 view;
+    mat4 proj;
+    vec4 viewPos;
 } cam;
 
 uniform Model {
-  mat4 inner;
+    mat4 inner;
 } model;
 
 // Outputs
@@ -21,13 +30,23 @@ layout(location = 1) out vec3 fragNormal;
 layout(location = 2) out vec2 fragTexCoords;
 
 out vec4 viewPos;
+// out vec4 dbgcolor;
 
 void main() {
-  fragWorldPos = vec3(model.inner * vec4(inPosition, 1.0));
-  fragNormal = mat3(transpose(inverse(model.inner))) * inNormal; // world-space normal
-  fragTexCoords = inTexCoords;
+    mat4 skinMatrix =
+        inWeights.x * anim.boneMatrices[int(inBoneIndices.x)] +
+            inWeights.y * anim.boneMatrices[int(inBoneIndices.y)] +
+            inWeights.z * anim.boneMatrices[int(inBoneIndices.z)] +
+            inWeights.w * anim.boneMatrices[int(inBoneIndices.w)];
+
+    vec4 totalPosition = skinMatrix * vec4(inPosition, 1.0);
+
+    fragWorldPos = vec3(model.inner * totalPosition);
+    fragNormal = mat3(transpose(inverse(model.inner))) * inNormal; // world-space normal
+    fragTexCoords = inTexCoords;
 
-  viewPos = cam.viewPos;
+    viewPos = cam.viewPos;
 
-  gl_Position =  cam.proj * cam.view * model.inner * vec4(inPosition, 1.0);
+    gl_Position = cam.proj * cam.view * model.inner * vec4(inPosition, 1.0);
+    // gl_Position = cam.proj * cam.view * model.inner * totalPosition;
 }