WIP: normal maps

shaders/vertex.glsl

@@ -2,9 +2,12 @@
 layout (location = 0) in vec3 aPos;
 layout (location = 1) in vec3 aNormal;
 layout (location = 2) in vec2 aTexCoords;
+layout (location = 3) in vec3 aTangent;
+layout (location = 4) in vec3 aBitangent;
 out vec3 fragNormals;
 out vec3 fragPos;
 out vec2 texCoords;
+out mat3 fragTBN;
 
 uniform mat4 model;
 uniform mat4 view;
@@ -19,7 +22,14 @@ void main()
     fragNormals = normalMatrix * aNormal;
   else
     fragNormals = mat3(transpose(inverse(model))) * aNormal;
+
+  vec3 T = normalize(vec3(model * vec4(aTangent, 0.0)));
+  vec3 B = normalize(vec3(model * vec4(aBitangent, 0.0)));
+  vec3 N = normalize(vec3(model * vec4(aNormal, 0.0)));
+  mat3 TBN = mat3(T, B, N);
+
   fragPos = vec3(model * vec4(aPos, 1.0));
   texCoords = aTexCoords;
+  fragTBN = TBN;
 }