【cocos shader 003】 剑光 流光 荧光

效果：

local vertex = [[
attribute vec4 a_position;
attribute vec2 a_texCoord;//GL_ES是阉割版的OpenGL, 和原生的有一点区别，mediump 字段写与不写，变量的精度不一样
#ifdef GL_ES
varying mediump vec2 v_texCoord;
varying mediump vec2 v_position;	//将顶点的位置传给片段着色器，用于计算该顶点与灯的距离
#else
varying vec2 v_texCoord;
varying vec2 v_position;
#endifvoid main()
{v_position = a_position.xy;		//顶点在图片中的坐标(一般是像素坐标)gl_Position = CC_PMatrix * a_position;v_texCoord = a_texCoord;		//顶点对应的纹理坐标}
]]local fragment= [[
#ifdef GL_ES
varying lowp vec2 v_texCoord;
varying mediump vec2 v_position;
#else
varying vec2 v_texCoord;
varying vec2 v_position;
#endiffloat width = 0.1f;
float maxBright = 5.f;void main()
{		vec2 uv = v_texCoord;vec3 color = texture2D(CC_Texture0, uv);			//获取当前像素的实际颜色float center = abs(sin(CC_Time.x * 20) -