wip: fix vertex shader

bin/shaders/3d.vsh

@@ -6,9 +6,9 @@ layout(location = 1) in vec3 inTexCoords;
 layout(location = 2) in vec4 inColor;
 layout(location = 3) in vec3 inNormal;
 
-uniform mat4 transformationMatrix;
-uniform mat4 matProjection;
-uniform mat4 matModelView;
+// uniform mat4 transformationMatrix;
+uniform mat4 matProjection; // brings the vertices into clip space.
+uniform mat4 matModelView; // equal to transformationMatrix in tutorial
 uniform vec3 cameraPosition;
 
 out vec4 vertColor;
@@ -17,7 +17,8 @@ out vec3 reflectedVector;
 out vec3 pass_normal;
 
 void main(void) {
-    gl_Position = matProjection * matModelView * vec4(inPosition, 1);
+    vec4 worldPosition = matModelView * vec4(inPosition, 1);
+    // gl_Position = matProjection * ? * worldPosition;
     vertColor = inColor / 255.0;
     vertTexCoords = inTexCoords;
 
@@ -26,7 +27,7 @@ void main(void) {
     vec3 unitNormal = normalize(inNormal);
 
     vec3 positionVector = vec3(matModelView * vec4(inPosition, 1));
-    vec3 viewVector = normalize(positionVector - cameraPosition);
+    vec3 viewVector = normalize(worldPosition.xyz - cameraPosition);
     // vec3 viewVector = normalize(gl_Position.xyz - cameraPosition);
     reflectedVector = reflect(viewVector, unitNormal);
 }