Revision control
++ //! [0]
++ #version 440
++
++ layout(location = 0) in vec4 position;
++ layout(location = 1) in vec3 color;
++ layout(location = 0) out vec3 v_color;
++
++ layout(std140, binding = 0) uniform buf {
++ mat4 mvp;
++ float opacity;
++ };
++
++ void main()
++ {
++ v_color = color;
++ gl_Position = mvp * position;
++ }
++ //! [0]