19 lines
518 B
GLSL
19 lines
518 B
GLSL
#version 450
|
|
|
|
// Shared fullscreen-triangle vertex shader for the SDL3 GPU backend.
|
|
// Emits vUV in Shadertoy convention: (0,0) bottom-left, (1,1) top-right.
|
|
// Y flipped in NDC because Vulkan/Metal point Y down by default.
|
|
|
|
layout(location = 0) out vec2 vUV;
|
|
|
|
void main() {
|
|
const vec2 positions[3] = vec2[3](
|
|
vec2(-1.0, -1.0),
|
|
vec2( 3.0, -1.0),
|
|
vec2(-1.0, 3.0)
|
|
);
|
|
vec2 pos = positions[gl_VertexIndex];
|
|
vUV = pos * 0.5 + 0.5;
|
|
gl_Position = vec4(pos.x, -pos.y, 0.0, 1.0);
|
|
}
|