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2026-05-24 10:21:26 +08:00

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// Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
CCEffect %{
techniques:
- passes:
- vert: vs
frag: fs
blendState:
targets:
- blend: true
rasterizerState:
cullMode: none
properties:
texture: { value: white }
alphaThreshold: { value: 0.5 }
time: { value: 0.0 }
}%
CCProgram vs %{
precision highp float;
#include <cc-global>
#include <cc-local>
in vec3 a_position;
in vec4 a_color;
out vec4 v_color;
#if USE_TEXTURE
in vec2 a_uv0;
out vec2 v_uv0;
#endif
void main () {
vec4 pos = vec4(a_position, 1);
#if CC_USE_MODEL
pos = cc_matViewProj * cc_matWorld * pos;
#else
pos = cc_matViewProj * pos;
#endif
#if USE_TEXTURE
v_uv0 = a_uv0;
#endif
v_color = a_color;
gl_Position = pos;
}
}%
CCProgram fs %{
precision highp float;
#include <alpha-test>
#include <texture>
#define TAU 6.12
#define MAX_ITER 5
in vec4 v_color;
#if USE_TEXTURE
in vec2 v_uv0;
uniform sampler2D texture;
uniform anonymity {
float time;
};
#endif
void main () {
vec4 o = vec4(1, 1, 1, 1);
#if USE_TEXTURE
float time = time * 0.5 + 5.0;
vec2 p = mod(v_uv0 * TAU, TAU) - 250.0;
vec2 i = vec2(p);
float c = 1.0;
float inten = 0.0045;
for (int n = 0; n < MAX_ITER; n++) {
float t = time * (1.0 - (3.5 / float(n + 1)));
i = p + vec2(cos(t - i.x) + sin(t + i.y), sin(t - i.y) + cos(1.5 * t + i.x));
c += 1.0 / length(vec2(p.x / (cos(i.x + t) / inten), p.y / (cos(i.y + t) / inten)));
}
c /= float(MAX_ITER);
c = 1.17 - pow(c, 1.4);
vec3 _o = vec3(pow(abs(c), 20.0));
CCTexture(texture, v_uv0, o);
_o = clamp(_o + vec3(0.0, 0.0, 0.0), 0.0, o.a);
float alpha = c * o.a;
o.r = o.r + _o.r * alpha;
o.g = o.g + _o.g * alpha;
o.b = o.b + _o.b * alpha;
#endif
o *= v_color;
ALPHA_TEST(o);
gl_FragColor = o;
}
}%