26 lines
519 B
GLSL
26 lines
519 B
GLSL
|
#version 450
|
||
|
|
|
||
|
|
// we use a mat4 since it uses the same size as mat3 due to
|
||
|
|
// alignment. Easier to deal with (tighly-packed) mat4 though.
|
||
|
|
layout(push_constant, row_major) uniform UBO {
|
||
|
|
mat4 proj;
|
||
|
|
vec2 uv_offset;
|
||
|
|
vec2 uv_size;
|
||
|
|
} data;
|
||
|
|
|
||
|
|
layout(location = 0) out vec2 uv;
|
||
|
|
|
||
|
|
// 4 outlining points and uv coords
|
||
|
|
const vec2[] values = {
|
||
|
|
{0, 0},
|
||
|
|
{1, 0},
|
||
|
|
{1, 1},
|
||
|
|
{0, 1},
|
||
|
|
};
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
vec2 pos = values[gl_VertexIndex % 4];
|
||
|
|
uv = data.uv_offset + pos * data.uv_size;
|
||
|
|
gl_Position = data.proj * vec4(pos, 0.0, 1.0);
|
||
|
|
}
|