Fix lighting: Normalmatrix was never applied

res/shaders/basic.frag

@@ -13,6 +13,8 @@ struct Material {
     sampler2D texture_specular1;
     sampler2D texture_normal0;
     sampler2D texture_normal1;
+    sampler2D texture_height0;
+    sampler2D texture_height1;
     sampler2D texture_gloss0;
     sampler2D texture_gloss1;
     float shininess;
@@ -73,7 +75,7 @@ void main() {
 
     vec3 fragmentColor = vec3(0.0f);
 
-    vec3 normal = normalize(v_normal);
+    vec3 normal = normalize(u_normalMatrix * v_normal);
     vec3 viewDir = normalize(u_viewPosition - v_fragmentPosition);
 
     fragmentColor += directionalLightContribution(u_directionalLight, normal, viewDir);

res/shaders/light.vert

@@ -4,13 +4,8 @@ layout(location = 0) in vec3 a_position;
 layout(location = 1) in vec2 a_texCoord;
 layout(location = 2) in vec4 a_color;
 
-out vec4 v_color;
-out vec2 v_texCoord;
-
 uniform mat4 u_modelViewProjMatrix;
 
 void main() {
     gl_Position = u_modelViewProjMatrix * vec4(a_position, 1.0f);
-    v_texCoord = a_texCoord;
-    v_color = a_color;
 }