mirror of
https://github.com/italicsjenga/slang-shaders.git
synced 2024-11-29 02:41:32 +11:00
24 lines
784 B
C
24 lines
784 B
C
|
#ifndef CURV
|
||
|
|
#define CURV
|
||
|
|
|
||
|
|
#pragma parameter warpX "Warp X" 0.031 0.0 0.125 0.01
|
||
|
|
#pragma parameter warpY "Warp Y" 0.041 0.0 0.125 0.01
|
||
|
|
vec2 Distortion = vec2(warpX, warpY) * 15.;
|
||
|
|
|
||
|
|
vec2 warp(vec2 texCoord){
|
||
|
|
vec2 Distortion = vec2(warpX, warpY) * 15.;
|
||
|
|
vec2 curvedCoords = texCoord * 2.0 - 1.0;
|
||
|
|
float curvedCoordsDistance = sqrt(curvedCoords.x*curvedCoords.x+curvedCoords.y*curvedCoords.y);
|
||
|
|
|
||
|
|
curvedCoords = curvedCoords / curvedCoordsDistance;
|
||
|
|
|
||
|
|
curvedCoords = curvedCoords * (1.0-pow(vec2(1.0-(curvedCoordsDistance/1.4142135623730950488016887242097)),(1.0/(1.0+Distortion*0.2))));
|
||
|
|
|
||
|
|
curvedCoords = curvedCoords / (1.0-pow(vec2(0.29289321881345247559915563789515),(1.0/(vec2(1.0)+Distortion*0.2))));
|
||
|
|
|
||
|
|
curvedCoords = curvedCoords * 0.5 + 0.5;
|
||
|
|
return curvedCoords;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|