opengles实现卡通效果

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核心shader实现

const char* vs ={"attribute vec3 inVertex;""attribute vec3 inNormal;"//法线"uniform mat4 MVPMatrix;""uniform vec3 LightDirection;"//光的方向"uniform vec3 EyePosition;""varying vec2 TexCoord;""void main()""{""gl_Position=MVPMatrix*vec4(inVertex,1.0);""vec3 eyeDirection=normalize(EyePosition-inVertex);""TexCoord.x=dot(LightDirection,inNormal);"//dot(x, y): 点积，各分量分别相乘 后 相加"TexCoord.y=dot(eyeDirection,inNormal);""}"};const char* ps ={"precision lowp float;""uniform sampler2D sTexture;""varying vec2 TexCoord;""const vec3 cBaseColor=vec3(1,1,1);""void main()""{""gl_FragColor=vec4(cBaseColor*texture2D(sTexture, TexCoord).rgb,1.0);""}"};

渲染函数

        virtual void    onRender(Program_CELL& shader,CELL3RDCamera& camera)        {static float angle = 0;matrix4 matRot(1);matRot.rotateY(angle);matrix4 matTrans;matTrans.translate(0,5,0);matrix4 matScale(1);matScale.scale(0.3f,0.3f,0.3f);//总的模型变换矩阵matrix4 matModel = matTrans*matRot*matScale;angle += 1.0f;//观察点坐标  也就是眼睛的位置float4 vMsEyePos = float4(0, 0, 125, 1)*matModel;_device.setUniform3fv(shader.EyePosition,1,&vMsEyePos.x);//从世界空间转换方向光到模型空间float4 vMsLightDir = float4(1, 2, 1, 0)*matModel;//光的入射方向//归一化float3 vMsLightDirS = normalize(float3(vMsLightDir.x,vMsLightDir.y,vMsLightDir.z));_device.setUniform3fv(shader.LightDirection,1,&vMsLightDirS.x);//光源位置float4 vMsLightPos = float4(50,20,40,1);vMsLightPos = vMsLightPos*matModel;matrix4 MVP = camera._matProj*camera._matView*matModel;_device.setUniformMatrix4fv(shader.MVPMatrix,1,false,MVP.data());VertexBumpMap* vert = &_arVertexs.front();_device.attributePointer(shader.inVertex,3,GL_FLOAT,GL_FALSE,sizeof(VertexBumpMap),vert);_device.attributePointer(shader.inNormal, 3, GL_FLOAT, GL_FALSE, sizeof(VertexBumpMap), &vert[0]._normal);_device.drawElements(GL_TRIANGLES,_arFaces.size()*3,GL_UNSIGNED_SHORT,&_arFaces.front());        }

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