vectors are now passed to the gpu instead of being embedded to the shader

shaders/fragment.frag

@@ -1,9 +1,9 @@
 #version 450
 
-layout(location = 0) in vec3 in_color;
+layout(location = 0) in vec3 frag_color;
 layout(location = 0) out vec4 out_color;
 
 void main()
 {
-    out_color = vec4(in_color, 1.0);
+    out_color = vec4(frag_color, 1.0);
 }

shaders/vertex.vert

@@ -3,22 +3,13 @@
 // x -> -1 (left) 1(right)
 // y -> -1 (top)  1(bottom)
 
-vec2 positions[3] = vec2[](
-    vec2(0.0, -0.5),
-    vec2(0.5, 0.5),
-    vec2(-0.5, 0.5)
-);
+layout(location = 0) in vec2 in_position;
+layout(location = 1) in vec3 in_color;
 
-vec3 colors[3] = vec3[](
-    vec3(1.0, 0.0, 0.0),
-    vec3(0.0, 1.0, 0.0),
-    vec3(0.0, 0.0, 1.0)
-);
-
-layout(location = 0) out vec3 in_color;
+layout(location = 0) out vec3 frag_color;
 
 void main()
 {
-    gl_Position = vec4(positions[gl_VertexIndex], 0.0, 1.0);
-    in_color = colors[gl_VertexIndex];
+    gl_Position = vec4(in_position, 0.0, 1.0);
+    frag_color = in_color;
 }