71 lines
1.7 KiB
GLSL
71 lines
1.7 KiB
GLSL
#version 440
|
|
|
|
layout(location = 0) in vec2 qt_TexCoord0;
|
|
layout(location = 0) out vec4 fragColor;
|
|
|
|
layout(std140, binding = 0) uniform buf {
|
|
mat4 qt_Matrix;
|
|
float qt_Opacity;
|
|
float uSize;
|
|
float uWavePhase;
|
|
vec4 uResolution;
|
|
vec4 uC0;
|
|
vec4 uC1;
|
|
vec4 uC2;
|
|
};
|
|
|
|
float sdHexagon(vec2 p, float r) {
|
|
const vec3 k = vec3(-0.866025404, 0.5, 0.577350269);
|
|
p = abs(p);
|
|
p -= 2.0 * min(dot(k.xy, p), 0.0) * k.xy;
|
|
p -= vec2(clamp(p.x, -k.z * r, k.z * r), r);
|
|
return length(p) * sign(p.y);
|
|
}
|
|
|
|
void main() {
|
|
vec2 res = uResolution.xy;
|
|
vec2 frag = qt_TexCoord0 * res;
|
|
|
|
float dx = uSize * 1.5;
|
|
float dy = uSize * 1.7320508;
|
|
|
|
float col = round(frag.x / dx);
|
|
float yoff = mod(col, 2.0) != 0.0 ? dy * 0.5 : 0.0;
|
|
float row = round((frag.y - yoff) / dy);
|
|
vec2 center = vec2(col * dx, row * dy + yoff);
|
|
|
|
// Wave factor
|
|
float dist = center.x - uWavePhase;
|
|
float wf = exp(-dist * dist / 9000.0);
|
|
|
|
float baseR = uSize * 0.48;
|
|
float inradius = baseR * (1.0 + 0.35 * wf);
|
|
|
|
vec2 p = frag - center;
|
|
float d = sdHexagon(p.yx, inradius); // swap for flat-top
|
|
if (d > 0.0) {
|
|
fragColor = vec4(0.0);
|
|
return;
|
|
}
|
|
|
|
// Gradient color
|
|
float fx = clamp(center.x / res.x, 0.0, 1.0);
|
|
vec3 rgb = fx < 0.5
|
|
? mix(uC0.rgb, uC1.rgb, fx * 2.0)
|
|
: mix(uC1.rgb, uC2.rgb, (fx - 0.5) * 2.0);
|
|
|
|
// Alpha from distance to center
|
|
float fy = clamp(center.y / res.y, 0.0, 1.0);
|
|
float dc = length(vec2(fx - 0.5, fy - 0.5));
|
|
float a = 0.03 + dc * 0.06;
|
|
|
|
// Wave brighten
|
|
rgb = min(rgb + vec3(0.3 * wf), vec3(1.0));
|
|
a += 0.12 * wf;
|
|
|
|
// Anti-alias
|
|
float aa = 1.0 - smoothstep(-1.0, 0.0, d);
|
|
a *= aa;
|
|
|
|
fragColor = vec4(rgb * a, a) * qt_Opacity;
|
|
}
|