Add ortographic camera

shaders/vertex.glsl

@@ -1,14 +1,20 @@
 #version 330 core
 layout (location = 0) in vec3 pos;
 uniform vec4 uniform_color;
+uniform mat4 camera;
+uniform vec2 window_size;
 out vec4 vertex_color;
 const mat4 to_draw_coordinates_matrix = mat4(
     1., 0., 0., 0.,
     0., -1., 0., 0.,
     0., 0., 1., 0.,
     -1, 1, 0, 1);
+
 void main()
 {
-    gl_Position = to_draw_coordinates_matrix*vec4(pos, 1.0f);
+    float aspect_ratio = window_size.x / window_size.y;
+    mat4 scaling_matrix = mat4(1.0);
+    scaling_matrix[1][1] = aspect_ratio;
+    gl_Position = camera*scaling_matrix*to_draw_coordinates_matrix*vec4(pos, 1.0f);
     vertex_color = uniform_color;
 }