56 lines
1.7 KiB
GLSL
56 lines
1.7 KiB
GLSL
#version 450
|
|
#extension GL_ARB_separate_shader_objects : enable
|
|
|
|
// Underwater screen warp effect similar to what software renderer provides.
|
|
// Pixel size to simulate lower screen resolutions is used to restore world to full screen size.
|
|
|
|
layout(push_constant) uniform PushConstant
|
|
{
|
|
layout(offset = 68) float time;
|
|
layout(offset = 72) float scale;
|
|
layout(offset = 76) float scrWidth;
|
|
layout(offset = 80) float scrHeight;
|
|
layout(offset = 84) float offsetX;
|
|
layout(offset = 88) float offsetY;
|
|
layout(offset = 92) float pixelSize;
|
|
layout(offset = 96) float refdefX;
|
|
layout(offset = 100) float refdefY;
|
|
layout(offset = 104) float refdefWidth;
|
|
layout(offset = 108) float refdefHeight;
|
|
} pc;
|
|
|
|
layout(set = 0, binding = 0) uniform sampler2D sTexture;
|
|
|
|
layout(location = 0) out vec4 fragmentColor;
|
|
|
|
#define PI 3.1415
|
|
|
|
void main()
|
|
{
|
|
vec2 scrSize = vec2(pc.scrWidth, pc.scrHeight);
|
|
vec2 fragCoord = (gl_FragCoord.xy - vec2(pc.offsetX, pc.offsetY));
|
|
vec2 uv = fragCoord / scrSize;
|
|
|
|
float xMin = pc.refdefX;
|
|
float xMax = pc.refdefX + pc.refdefWidth;
|
|
float yMin = pc.refdefY;
|
|
float yMax = pc.refdefY + pc.refdefHeight;
|
|
|
|
if (pc.time > 0 && fragCoord.x > xMin && fragCoord.x < xMax && fragCoord.y > yMin && fragCoord.y < yMax)
|
|
{
|
|
float sx = pc.scale - abs(pc.scrWidth / 2.0 - fragCoord.x) * 2.0 / pc.scrWidth;
|
|
float sy = pc.scale - abs(pc.scrHeight / 2.0 - fragCoord.y) * 2.0 / pc.scrHeight;
|
|
float xShift = 2.0 * pc.time + uv.y * PI * 10;
|
|
float yShift = 2.0 * pc.time + uv.x * PI * 10;
|
|
vec2 distortion = vec2(sin(xShift) * sx, sin(yShift) * sy) * 0.00666;
|
|
|
|
uv += distortion;
|
|
}
|
|
|
|
uv /= pc.pixelSize;
|
|
|
|
uv = clamp(uv * scrSize, vec2(0.0, 0.0), scrSize - vec2(0.5, 0.5));
|
|
|
|
fragmentColor = textureLod(sTexture, uv, 0.0);
|
|
}
|