cocos2dx Material System讲解一

概述        cocos2dx 增加了材料系统，因为之前我深入研究过RenderMonkey这个软件，又深入学习了OpenGl es2.0，所以理解起来还是挺轻松的。但是有些写法还是不太一样，所以在这里记下，和大家分享一下。 首先，我们先看一个material： material mf{technique m0 { pass 0 { renderState

cocos2dx 增加了材料系统，因为之前我深入研究过RenderMonkey这个软件，又深入学习了OpenGl es2.0，所以理解起来还是挺轻松的。但是有些写法还是不太一样，所以在这里记下，和大家分享一下。

首先，我们先看一个material：

material mf{technique m0   {   pass 0   {       renderState       {           cullFace=true           depthTest=true       }       shader       {           vertexShader=shaders/molecular_formula.vert           fragmentShader=shaders/molecular_formula.frag           u_lightLocation=0,0           u_Camera=0,0           ucolorR=0.1           ucolorG=0.6           ucolorB=0.9           ucolorA=0.0		   transparent=0.0       }   }   }   technique m1   {   pass 1   {       renderState       {           cullFace=true           depthTest=true       }       shader       {           vertexShader=shaders/molecular_formula.vert           fragmentShader=shaders/molecular_formula.frag           u_lightLocation=0,0           ucolorR=0.1           ucolorG=0.6           ucolorB=0.9           ucolorA=1.0		   transparent=0.7       }   }   } technique m2   {   pass 2   {       renderState       {           cullFace=true           depthTest=true       }       shader       {           vertexShader=shaders/molecular_formula.vert           fragmentShader=shaders/molecular_formula.frag           u_lightLocation=0,-20           u_Camera=0,10           ucolorR=0.95           ucolorG=0.95           ucolorB=0.10           ucolorA=1.0		   transparent=0.7       }   }   }    technique m3   {   pass 3   {       renderState       {           cullFace=true           depthTest=true       }       shader       {           vertexShader=shaders/molecular_formula.vert           fragmentShader=shaders/molecular_formula.frag           u_lightLocation=10,100           ucolorR=0.95           ucolorG=0.45           ucolorB=0.25           ucolorA=1.0		   transparent=0.7       }   }   }    technique m4   {   pass 1   {       renderState       {           cullFace=true           depthTest=true       }       shader       {           vertexShader=shaders/molecular_formula.vert           fragmentShader=shaders/molecular_formula.frag           u_lightLocation=-100,100           u_Camera=100,50           ucolorR=0.1           ucolorG=0.6           ucolorB=0.9           ucolorA=1.0		   transparent=0.7       }   }   }}

molecular_formula.vert

attribute vec4 a_position;attribute vec3 a_normal;attribute vec2 a_texCoord;uniform vec3 u_lightLocation;uniform vec3 u_Camera;varying vec2 v_texture_coord;varying vec4 v_ambIEnt;varying vec4 v_diffuse;varying vec4 v_specular;voID pointlight(  in vec3 normal,inout vec4 ambIEnt,inout vec4 diffuse,inout vec4 specular,in vec3 lightLocation,in vec4 lightAmbIEnt,in vec4 lightDiffuse,in vec4 lightspecular ){  ambIEnt=lightAmbIEnt;  vec3 normalTarget= a_position.xyz+normal;  vec3 newnormal=(CC_MVMatrix*vec4(normalTarget,1)).xyz-(CC_MVMatrix*a_position).xyz;  newnormal=normalize(newnormal);  vec3 eye=normalize(u_Camera-(CC_MVMatrix*a_position).xyz);  vec3 vp=normalize(lightLocation-(CC_MVMatrix*a_position).xyz);  vp=normalize(vp);  vec3 halfVector=normalize(vp+eye);  float shininess=50.0;  float nDotVIEwposition=max(0.0,dot(newnormal,vp));  diffuse=lightDiffuse*nDotVIEwposition;  float nDotVIEwHalfVector=dot(newnormal,halfVector);  float powerFactor=max(0.0,pow(nDotVIEwHalfVector,shininess));  specular=lightspecular*powerFactor;  }voID main(voID){    gl_position = CC_MVPMatrix * a_position;        vec4 ambIEntTemp,diffuseTemp,specularTemp;        pointlight(normalize(a_normal),ambIEntTemp,specularTemp,u_lightLocation,vec4(0.8,0.8,1.0),vec4(0.9,0.9,1.0));        v_ambIEnt=ambIEntTemp;    v_diffuse=diffuseTemp;    v_specular=specularTemp;        v_texture_coord = a_texCoord;    v_texture_coord.y = (1.0 - v_texture_coord.y);}

molecular_formula.frag

#ifdef GL_ESprecision mediump float;#endifuniform vec4  u_color;uniform float ucolorR;uniform float ucolorG;uniform float ucolorB;uniform float ucolorA;uniform float transparent;varying vec4 v_ambIEnt;varying vec4 v_diffuse;varying vec4 v_specular;voID main(voID){	 vec4 finalcolor =vec4(ucolorR,ucolorG,ucolorB,ucolorA);	 vec4 color=finalcolor*v_ambIEnt+finalcolor*v_diffuse+finalcolor*v_specular;     gl_Fragcolor=color*u_color*transparent;    }

下面是效果图： 未完待续 总结

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