25 lines
No EOL
684 B
GLSL
25 lines
No EOL
684 B
GLSL
// Copyright 2020 Google LLC
|
|
|
|
Texture2DArray textureView : register(t1);
|
|
SamplerState samplerView : register(s1);
|
|
|
|
struct UBO
|
|
{
|
|
[[vk::offset(272)]] float distortionAlpha;
|
|
};
|
|
|
|
cbuffer ubo : register(b0) { UBO ubo; }
|
|
|
|
[[vk::constant_id(0)]] const float VIEW_LAYER = 0.0f;
|
|
|
|
float4 main([[vk::location(0)]] float2 inUV : TEXCOORD0) : SV_TARGET
|
|
{
|
|
const float alpha = ubo.distortionAlpha;
|
|
|
|
float2 p1 = float2(2.0 * inUV - 1.0);
|
|
float2 p2 = p1 / (1.0 - alpha * length(p1));
|
|
p2 = (p2 + 1.0) * 0.5;
|
|
|
|
bool inside = ((p2.x >= 0.0) && (p2.x <= 1.0) && (p2.y >= 0.0 ) && (p2.y <= 1.0));
|
|
return inside ? textureView.Sample(samplerView, float3(p2, VIEW_LAYER)) : float4(0.0, 0.0, 0.0, 0.0);
|
|
} |