cocos shader 之 黑白滤镜

概述效果: VSH: #ifdef OPENGL_ESprecision mediump vec2;precision mediump float;#endif// Attributesattribute vec3 a_position;attribute vec2 a_texCoord;attribute vec4 a_color;// Varyings#ifdef GL_ES

效果:

VSH:

#ifdef OPENGL_ESprecision mediump vec2;precision mediump float;#endif// Attributesattribute vec3 a_position;attribute vec2 a_texCoord;attribute vec4 a_color;// varyings#ifdef GL_ESvarying vec2 v_texCoord;#elsevarying vec2 v_texCoord;#endifvarying vec4 v_fragmentcolor;voID main(){    gl_position = CC_PMatrix * vec4(a_position,1.0);    v_texCoord = a_texCoord;    v_fragmentcolor = a_color;}

FSH:

#ifdef GL_ESprecision mediump float;#endifvarying vec2 v_texCoord;varying vec4 v_fragmentcolor;voID main() {    vec4 col = texture2D(CC_Texture0,v_texCoord );    float h = dot(col.rgb,vec3(0.3,0.59,0.21));	gl_Fragcolor = vec4(h,h,col.a);}

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