stuff

shaders/rig.vert

@@ -20,7 +20,30 @@ out vec3 normal;
 out vec2 texCoord;
 out vec3 FragPos;
 out vec4 fragposlightspace;
-	
+
+uniform int uvMode = 0;                // 0 = stretch, 1 = tile
+uniform vec3 tileScale = vec3(1.0);
+uniform vec2 uvOffset = vec2(0.0);
+
+// Same direction as transpose(inverse(m)) for normals, without the per vertex inverse
+mat3 CofactorMatrix(mat3 m)
+{
+    return mat3(cross(m[1], m[2]), cross(m[2], m[0]), cross(m[0], m[1]));
+}
+
+// Tiling ignores the mesh's uvs and projects from whichever axis the surface faces.
+// Done on the bind pose, so the pattern stays stuck to the character as it moves.
+vec2 SurfaceUV()
+{
+    if (uvMode == 0) return tex + uvOffset;
+
+    vec3 n = abs(norm);
+    vec3 p = pos * tileScale;
+    if (n.y >= n.x && n.y >= n.z) return p.xz + uvOffset;
+    if (n.x >= n.z) return p.zy + uvOffset;
+    return p.xy + uvOffset;
+}
+
 void main()
 {
     vec4 totalPosition = vec4(0.0);
@@ -40,9 +63,10 @@ void main()
         totalPosition += (finalBonesMatrices[boneIds[i]] * vec4(pos, 1.0))* weights[i];
         totalNormal   += mat3(finalBonesMatrices[boneIds[i]]) * norm * weights[i];
     }
-    FragPos          = vec3(modl * totalPosition);
-    fragposlightspace = lightSpaceMatrix * vec4(FragPos, 1.0);
-    gl_Position      = proj * view * modl * totalPosition;
-    normal           = normalize(mat3(transpose(inverse(modl))) * totalNormal);
-    texCoord         = tex;
+    vec4 worldPos    = modl * totalPosition;
+    FragPos          = worldPos.xyz;
+    fragposlightspace = lightSpaceMatrix * worldPos;
+    gl_Position      = proj * view * worldPos;
+    normal           = normalize(CofactorMatrix(mat3(modl)) * totalNormal);
+    texCoord         = SurfaceUV();
 }