32 lines
680 B
Plaintext
32 lines
680 B
Plaintext
|
#version 450
|
||
|
|
|
||
|
|
#include "compiled.inc"
|
||
|
|
|
||
|
|
uniform mat4 invVP;
|
||
|
|
uniform vec3 eye;
|
||
|
|
|
||
|
|
in vec2 pos;
|
||
|
|
|
||
|
|
out vec2 texCoord;
|
||
|
|
out vec3 viewRay;
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
// Scale vertex attribute to [0-1] range
|
||
|
|
const vec2 madd = vec2(0.5, 0.5);
|
||
|
|
texCoord = pos.xy * madd + madd;
|
||
|
|
#ifdef _InvY
|
||
|
|
texCoord.y = 1.0 - texCoord.y;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
gl_Position = vec4(pos.xy, 0.0, 1.0);
|
||
|
|
|
||
|
|
// fullscreen triangle: http://de.slideshare.net/DevCentralAMD/vertex-shader-tricks-bill-bilodeau
|
||
|
|
// gl_Position = vec4((gl_VertexID % 2) * 4.0 - 1.0, (gl_VertexID / 2) * 4.0 - 1.0, 0.0, 1.0);
|
||
|
|
|
||
|
|
// NDC (at the back of cube)
|
||
|
|
vec4 v = vec4(pos.x, pos.y, 1.0, 1.0);
|
||
|
|
v = vec4(invVP * v);
|
||
|
|
v.xyz /= v.w;
|
||
|
|
viewRay = v.xyz - eye;
|
||
|
|
}
|