Pixel-Composer/shaders/sh_ui_slider/sh_ui_slider.fsh

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2023-10-16 07:25:22 +02:00
//
// Simple passthrough fragment shader
//
varying vec2 v_vTexcoord;
varying vec4 v_vColour;
uniform vec2 dimension;
uniform vec4 c0, c1;
uniform float mouseProg;
uniform float prog;
void main() {
vec2 px = v_vTexcoord * dimension;
vec2 norm = abs(v_vTexcoord - vec2(0.5));
float bar = 1. - norm.y * 2.;
float rr = dimension.y / 2.;
if(px.x < rr) bar = 1. - distance(px, vec2(rr, rr)) / rr;
else if(px.x > dimension.x - rr) bar = 1. - distance(px, vec2(dimension.x - rr, rr)) / rr;
bar = clamp(bar, 0., 1.);
float dif = abs(v_vTexcoord.x - prog);
float d0 = clamp(smoothstep(0.9 + mouseProg * 0.05, 1.00, 1. - dif) * 1., 0., 1.);
float d1 = clamp(1. - smoothstep(0.85 + mouseProg * 0.05, 1.00, 1. - dif) * 2., 0., 0.75);
float rad = 0.8 - d0 * (mouseProg * 0.25 + 0.4);
bar = smoothstep(rad, 1.0, bar) * 25.;
gl_FragColor = vec4(mix(c0.rgb, c1.rgb, d1), bar);
}