basic lighting

shaders/triangle.vert

@@ -3,8 +3,9 @@
 layout(location = 0) in vec3 position; // Vertex position
 layout(location = 1) in vec3 normal;   // Vertex normal
 layout(location = 2) in vec2 texCoord; // Vertex texture coordinate
-out vec3 Color; // Output color to the fragment shader
-out vec2 TexCoord; // Output texture coordinate to the fragment shader
+out vec3 Normal;
+out vec3 FragPos;  
+out vec2 TexCoord;
 
 uniform mat4 model;
 uniform mat4 view;
@@ -12,6 +13,7 @@ uniform mat4 projection;
 
 void main() {
     gl_Position = projection * view * model * vec4(position, 1.0); // Apply transformation matrices
-    Color = normal * 0.5 + 0.5; // Simple coloring based on normal
-    TexCoord = texCoord; // Pass through the texture coordinate
+    FragPos = vec3(model * vec4(position, 1.0));
+    Normal = mat3(transpose(inverse(model))) * normal;
+    TexCoord = texCoord;
 }