source/blender/draw/engines/overlay/shaders/image_vert.glsl


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21


uniform bool depthSet;

in vec3 pos;

out vec2 uvs;

void main()
{
  vec3 world_pos = point_object_to_world(pos);
  gl_Position = point_world_to_ndc(world_pos);

  if (depthSet) {
    /* Result in a position at 1.0 (far plane). Small epsilon to avoid precision issue.
     * This mimics the effect of infinite projection matrix
     * (see http://www.terathon.com/gdc07_lengyel.pdf). */
    gl_Position.z = gl_Position.w - 2.4e-7;
  }

  uvs = pos.xy * 0.5 + 0.5;
}