这个是我在shadertoy上找到改写的效果
这个是代码：
// Effect Syntax Guide: https://github.com/cocos-creator/docs-3d/blob/master/zh/material-system/effect-syntax.md
CCEffect %{
techniques:
- name: opaque
passes:
- vert: general-vs:vert # builtin header
frag: unlit-fs:frag
properties: &props
mainTexture: { value: black }
mainColor: { value: [0, 0, 0, 1], editor: { type: color } }
# blendState:
# targets:
# - blend: true
# blendSrc: src_alpha
# blendDst: one
# blendEq: add
# blendSrcAlpha: one
# blendDstAlpha: one_minus_src_alpha
# blendAlphaEq: add
# blendColorMask: all
}%
CCProgram unlit-fs %{
precision highp float;
#include <output>
#include <cc-fog-fs>
#include <cc-global>
in vec2 v_uv;
in float blinkTransparency;
uniform sampler2D mainTexture;
uniform Constant {
vec4 mainColor;
};
float PI = 3.1415926535;
float sections = 3.0;
bool belongs(float time, vec2 uv, float near, float far) {
near += sin(uv.x - time * 8.0) / 50.0;
far += cos(uv.y - time * 8.0) / 50.0;
vec2 center = vec2(0.5, 0.5);
vec2 xy = uv - center;
float dist = distance(xy, vec2(0.0, 0.0));
float angle = mod(atan(xy.y, xy.x) + time * 2.5 + sin(time * 4.0) / 1.0, PI * 2.0);
float oddity = mod(angle / (2.0 * PI) * sections * 2.0, 2.0);
if (dist > near && dist < far && floor(mod(oddity, 2.0)) == 0.0) {
return true;
} else {
return false;
}
}
vec4 frag () {
vec4 fragColor;
vec2 UV = v_uv;
float TIME = cc_time.x/5.;
if (belongs(TIME, UV, 0.2, 0.25) || belongs(TIME + 0.5, UV, 0.3, 0.35) || belongs(TIME + 1.0, UV, 0.4, 0.45)) {
fragColor = mainColor;
} else {
discard;
}
return CCFragOutput(fragColor);
}
}%
请问要做成这种发光效果需要怎么实现？
感谢各位大佬 
