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