cocos2dx 多重纹理贴图

概述<1>myshader.vert attribute vec4 a_position;attribute vec4 a_color;attribute vec2 TextureCoord;varying vec4 DestinationColor;varying vec2 v_texCoord;void main(){ DestinationColor = a_color;

<1>myshader.vert

attribute vec4 a_position;attribute vec4 a_color;attribute vec2 TextureCoord;varying vec4 Destinationcolor;varying vec2 v_texCoord;voID main(){    Destinationcolor = a_color;    v_texCoord = TextureCoord;    gl_position = CC_MVPMatrix * a_position;}

<2>myshader.frag

varying vec4 Destinationcolor;varying vec2 v_texCoord;voID main(){    gl_Fragcolor = Destinationcolor * texture2D(CC_Texture0,v_texCoord);}

<3>CubeTexture.h

#ifndef __JNTest__CubeTexture__#define __JNTest__CubeTexture__#include "cocos2d.h"USING_NS_CC;class CubeTexture : public Layer{public:    static Scene* createScene();    virtual bool init();    virtual voID visit(Renderer *renderer,const Mat4& parenttransform,uint32_t parentFlags);    voID onDraw();    CREATE_FUNC(CubeTexture);private:    Mat4 _modelVIEwMV;    CustomCommand _customCommand;        GLProgram* mShaderProgram;    Glint _colorLocation;    Glint _positionLocation;    Glint _textureLocation;        gluint _textureUniform;        gluint _textureID;    gluint _textureID2;        gluint vertexBuffer;    gluint indexBuffer;        gluint _vertexBuffer2;    gluint _indexBuffer2;};#endif /* defined(__JNTest__CubeTexture__) */

<4>CubeTexture.cpp

#include "CubeTexture.h"using namespace GL;Scene* CubeTexture::createScene(){    auto scene = Scene::create();    auto layer = CubeTexture::create();    scene->addChild(layer);    return scene;}bool CubeTexture::init(){    if(!Layer::init()){        return false;    }        mShaderProgram = new GLProgram;    mShaderProgram->initWithfilenames("myshader.vert","myshader.frag");    mShaderProgram->link();    mShaderProgram->updateUniforms();        _textureID = Director::getInstance()->getTextureCache()->addImage("HelloWorld.png")->getname();    _textureID2 = Director::getInstance()->getTextureCache()->addImage("heart.png")->getname();        glGenBuffers(1,&vertexBuffer);    glBindBuffer(GL_ARRAY_BUFFER,vertexBuffer);        glGenBuffers(1,&indexBuffer);    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,indexBuffer);            return true;}voID CubeTexture::visit(Renderer *renderer,uint32_t parentFlags){    Node::visit(renderer,parenttransform,parentFlags);    _customCommand.init(_globalZOrder);    _customCommand.func = CC_CALLBACK_0(CubeTexture::onDraw,this);    renderer->addCommand(&_customCommand);}voID CubeTexture::onDraw(){    Director::getInstance()->pushmatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);       Director::getInstance()->loadIDentityMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);       Director::getInstance()->pushmatrix(MATRIX_STACK_TYPE::MATRIX_STACK_PROJECTION);      Director::getInstance()->loadIDentityMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_PROJECTION);    Mat4 modelVIEwMatrix;       Mat4::createLookAt(Vec3(0,5),Vec3(0,0),-1,&modelVIEwMatrix);        modelVIEwMatrix.translate(0,0 );      static float rotation = 20;       modelVIEwMatrix.rotate(Vec3(0,1,CC_degrees_TO_radians(rotation));    Mat4 projectionMatrix;      Mat4::createPerspective(60,480/320,1.0,42,&projectionMatrix);      Director::getInstance()->multiplyMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_PROJECTION,projectionMatrix);      Director::getInstance()->multiplyMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW,modelVIEwMatrix);    typedef struct {        float position[3];        float color[4];        float TexCoord[2];    } Vertex;   #define TEX_COORD_MAX   1    Vertex Vertices[] = {               // Front                {{1,0},{1,1},{TEX_COORD_MAX,0}},{{1,{0,TEX_COORD_MAX}},{{-1,// Back               {{1,-2},// left             {{-1,// Right            {{1,// top                {{1,// Bottom               {{1,0}}           };       int vertexCount = sizeof(Vertices) / sizeof(Vertices[0]);     glubyte Indices[] = {                // Front                0,2,3,// Back                4,5,6,4,7,// left               8,9,10,11,8,// Right               12,13,14,15,12,// top                16,17,18,19,16,// Bottom                20,21,22,23,20           };    // 1) Add to top of file    const Vertex Vertices2[] = {        {{0.5,-0.5,0.01},1}},{{0.5,0.5,{{-0.5,};    const glubyte Indices2[] = {        1,3    };    glBindBuffer(GL_ARRAY_BUFFER,vertexBuffer);       glBufferData(GL_ARRAY_BUFFER,sizeof(Vertices),Vertices,GL_STATIC_DRAW);    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,indexBuffer);        glBufferData(GL_ELEMENT_ARRAY_BUFFER,sizeof(Indices),Indices,GL_STATIC_DRAW);    _positionLocation = glGetAttribLocation(mShaderProgram->getProgram(),"a_position");    _colorLocation = glGetAttribLocation(mShaderProgram->getProgram(),"a_color");      _textureLocation = glGetAttribLocation(mShaderProgram->getProgram(),"TextureCoord");    _textureUniform = glGetUniformlocation(mShaderProgram->getProgram(),"CC_Texture0");       mShaderProgram->use();        mShaderProgram->setUniformsForBuiltins();     glEnabLevertexAttribarray(_positionLocation);      glEnabLevertexAttribarray(_colorLocation);        glEnabLevertexAttribarray(_textureLocation);      glVertexAttribPointer(_positionLocation,GL_float,GL_FALSE,sizeof(Vertex),(GLvoID*)offsetof(Vertex,position));      glVertexAttribPointer(_colorLocation,color));      glVertexAttribPointer(_textureLocation,TexCoord));        //        ////set sampler        GL::bindTexture2DN(0,_textureID);        //glActiveTexture( GL_TEXTURE0 );       //glBindTexture(GL_TEXTURE_2D,_textureID);        glBlendFunc(GL_ONE,GL_ONE_MINUS_SRC_Alpha);      glEnable(GL_BLEND);      glEnable(GL_DEPTH_TEST);        glDrawElements(GL_TRIANGLES,36,GL_UNSIGNED_BYTE,0);        gluniform1i(_textureUniform,0); // unnecc in practice       glGenBuffers(1,&_vertexBuffer2);       glBindBuffer(GL_ARRAY_BUFFER,_vertexBuffer2);        glBufferData(GL_ARRAY_BUFFER,sizeof(Vertices2),Vertices2,GL_STATIC_DRAW);      glGenBuffers(1,&_indexBuffer2);       glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,_indexBuffer2);       glBufferData(GL_ELEMENT_ARRAY_BUFFER,sizeof(Indices2),Indices2,GL_STATIC_DRAW);       glBindBuffer(GL_ARRAY_BUFFER,_vertexBuffer2);       glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,_indexBuffer2);       GL::bindTexture2DN(0,_textureID2);        gluniform1i(_textureUniform,0); // unnecc in practice      glVertexAttribPointer(_positionLocation,0);       glVertexAttribPointer(_colorLocation,(GLvoID*) (sizeof(float) * 3));       glVertexAttribPointer(_textureLocation,(GLvoID*) (sizeof(float) * 7));          glDrawElements(GL_TRIANGLE_STRIP,sizeof(Indices2)/sizeof(Indices2[0]),0);      CC_INCREMENT_GL_DRAWN_BATCHES_AND_VERTICES(1,vertexCount);      CHECK_GL_ERROR_DEBUG();      gldisable(GL_DEPTH_TEST);       Director::getInstance()->popMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_PROJECTION);       Director::getInstance()->popMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);}

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