Coloring triangles with texture

opengl-test-two/trimap.fragmentshader

@@ -1,8 +1,17 @@
 #version 330 core
 
-in vec3 fragmentColor;
+// Interpolated values from the vertex shaders
+in vec2 UV;
+
+// Ouput data
 out vec3 color;
 
+// Values that stay constant for the whole mesh.
+uniform sampler2D myTextureSampler;
+
 void main(){
-    color = fragmentColor;
+
+    // Output color = color of the texture at the specified UV
+    color = texture( myTextureSampler, UV ).rgb;
 }
+