tests/sksl/realistic/RippleShader.stage

uniform vec2 in_origin;
uniform vec2 in_touch;
uniform float in_progress;
uniform float in_maxRadius;
uniform vec2 in_resolutionScale;
uniform vec2 in_noiseScale;
uniform float in_hasMask;
uniform float in_noisePhase;
uniform float in_turbulencePhase;
uniform vec2 in_tCircle1;
uniform vec2 in_tCircle2;
uniform vec2 in_tCircle3;
uniform vec2 in_tRotation1;
uniform vec2 in_tRotation2;
uniform vec2 in_tRotation3;
layout (color) uniform vec4 in_color;
layout (color) uniform vec4 in_sparkleColor;
const float PI_0 = 3.14159274;
float sparkles_0(float2 uv, float t);
float softCircle_0(float2 uv, float2 xy, float radius, float blur);
float softRing_0(float2 uv, float2 xy, float radius, float progress, float blur);
float subProgress_0(float start, float end, float progress);
float circle_grid_0(float2 resolution, float2 coord, float time, float2 center, float2 rotation, float cell_diameter);
float turbulence_0(float2 uv, float t);
float sparkles_0(float2 uv, float t)
{
	float2 _0_n = uv;
	_0_n = fract(_0_n * float2(5.3987, 5.4421));
	_0_n += dot(_0_n.yx, _0_n + float2(21.5351, 14.3137));
	float _1_xy = _0_n.x * _0_n.y;
	float n = (fract(_1_xy * 95.4307) + fract(_1_xy * 75.04961)) - 1.0;
	float s = 0.0;
	for (float i = 0.0;i < 4.0; i += 1.0) 
	{
		float l = i * 0.1;
		float h = l + 0.05;
		float o = sin(PI_0 * (t + 0.35 * i));
		float _2_v = n + o;
		s += step(l, _2_v) * (1.0 - step(h, _2_v));
	}
	return saturate(s) * in_sparkleColor.w;
}
float softCircle_0(float2 uv, float2 xy, float radius, float blur)
{
	float blurHalf = blur * 0.5;
	float d = distance(uv, xy);
	return 1.0 - smoothstep(1.0 - blurHalf, 1.0 + blurHalf, d / radius);
}
float softRing_0(float2 uv, float2 xy, float radius, float progress, float blur)
{
	float thickness = 0.05 * radius;
	float currentRadius = radius * progress;
	float circle_outer = softCircle_0(uv, xy, currentRadius + thickness, blur);
	float circle_inner = softCircle_0(uv, xy, max(currentRadius - thickness, 0.0), blur);
	return saturate(circle_outer - circle_inner);
}
float subProgress_0(float start, float end, float progress)
{
	float sub = clamp(progress, start, end);
	return (sub - start) / (end - start);
}
float circle_grid_0(float2 resolution, float2 coord, float time, float2 center, float2 rotation, float cell_diameter)
{
	coord = float2x2(rotation.x, -rotation.y, rotation.y, rotation.x) * (center - coord) + center;
	coord = mod(coord, cell_diameter) / resolution;
	float normal_radius = (cell_diameter / resolution.y) * 0.5;
	float radius = 0.65 * normal_radius;
	return softCircle_0(coord, float2(normal_radius), radius, radius * 50.0);
}
float turbulence_0(float2 uv, float t)
{
	const float2 scale = float2(0.8);
	uv = uv * scale;
	float g1 = circle_grid_0(scale, uv, t, in_tCircle1, in_tRotation1, 0.17);
	float g2 = circle_grid_0(scale, uv, t, in_tCircle2, in_tRotation2, 0.2);
	float g3 = circle_grid_0(scale, uv, t, in_tCircle3, in_tRotation3, 0.275);
	float v = ((g1 * g1 + g2) - g3) * 0.5;
	return saturate(0.45 + 0.8 * v);
}
float4 main(float2 p)
{
	float fadeIn = subProgress_0(0.0, 0.13, in_progress);
	float scaleIn = subProgress_0(0.0, 1.0, in_progress);
	float fadeOutNoise = subProgress_0(0.4, 0.5, in_progress);
	float fadeOutRipple = subProgress_0(0.4, 1.0, in_progress);
	float2 center = mix(in_touch, in_origin, saturate(in_progress * 2.0));
	float ring = softRing_0(_coords, center, in_maxRadius, scaleIn, 1.0);
	float alpha = min(fadeIn, 1.0 - fadeOutNoise);
	float2 uv = _coords * in_resolutionScale;
	float2 densityUv = uv - mod(uv, in_noiseScale);
	float turbulence = turbulence_0(uv, in_turbulencePhase);
	float sparkleAlpha = ((sparkles_0(densityUv, in_noisePhase) * ring) * alpha) * turbulence;
	float fade = min(fadeIn, 1.0 - fadeOutRipple);
	float waveAlpha = (softCircle_0(_coords, center, in_maxRadius * scaleIn, 1.0) * fade) * in_color.w;
	float4 waveColor = float4(in_color.xyz * waveAlpha, waveAlpha);
	float4 sparkleColor = float4(in_sparkleColor.xyz * in_sparkleColor.w, in_sparkleColor.w);
	float mask = float(in_hasMask == 1.0 ? float(child_0.eval(_coords).w > 0.0) : 1.0);
	return half4(mix(waveColor, sparkleColor, sparkleAlpha) * mask);
}