cocos2d-x中的CCSprite只能渲染矩形，如果想随意渲染任意形状的贴图，我没找到什么现成的东西，自己扩展了一下CCSprite，如下：
//
// cPolySprite.h
// cardmap
// Created by sunny on 12-12-4.
//
#ifndef __cardmap__cPolySprite__
#define __cardmap__cPolySprite__
#include "cocos2d.h"
//多边形精灵
class cPolySprite :public cocos2d::CCSprite
{
public:
cPolySprite() : vertexs_(NULL),uvs_(NULL),indices_(NULL),verCnt_(0) {}
virtual ~cPolySprite();
static cPolySprite* create(const char *pFile,
constcocos2d::CCPoint *uvs,
intverCnt,
constint *indices);
//重载父类draw
void draw();
private:
//初始化顶点信息
bool initWithUV(const cocos2d::CCPoint *uvs,
constint *indices,
intverCnt);
//计算中点
cocos2d::CCPoint getCenter();
void translate(const cocos2d::CCPoint&);
void drawPoly();
void releasePoly();
private:
//多边形顶点
cocos2d::ccVertex2F *vertexs_;
//定点纹理坐标
cocos2d::ccVertex2F *uvs_;
//三角形索引
unsigned short *indices_;
//顶点颜色
unsigned char *colors_;
//顶点数目
int verCnt_;
};
#endif
//
//cPolySprite.cpp
//cardmap
//Created by sunny on 12-12-4.
#include "cPolySprite.h"
#include "cocos2d.h"
using namespacecocos2d;
cPolySprite*cPolySprite::create(constchar *pFile,
const cocos2d::CCPoint *uvs,0); margin:0px"> int verCnt,0); margin:0px"> const int *indices)
{
cPolySprite *pobSprite = new cPolySprite();
//创建精灵
if(pobSprite &&
pobSprite->initWithFile(pFile)&&
pobSprite->initWithUV(uvs,indices,verCnt)) {
pobSprite->autorelease();
return pobSprite;
}
CC_SAFE_DELETE(pobSprite);
return false;
}
cPolySprite::~cPolySprite()
releasePoly();
//初始化顶点信息
bool cPolySprite::initWithUV(const cocos2d::CCPoint *uvs,0); margin:0px"> const int *indices,0); margin:0px"> int verCnt)
//内存分配
vertexs_ = new ccVertex2F[verCnt];
uvs_ =new ccVertex2F[verCnt];
indices_ = new unsigned short[(verCnt-2)*3];
colors_ = new unsigned char[verCnt*4];
//失败处理
if(!vertexs_|| !uvs_ || !indices_ || !colors_) {
releasePoly();
returnfalse;
//贴图大小
CCSize rc =m_pobTexture->getContentSize();
for(inti = 0; i <verCnt; ++i) {
//根据纹理坐标以及纹理大小计算顶点坐标
vertexs_[i].x = uvs[i].x*rc.width;
//cocos2dx纹理坐标以左上角为原点
vertexs_[i].y = (1.0-uvs[i].y)*rc.height;
uvs_[i].x= uvs[i].x;
uvs_[i].y= uvs[i].y;
for(inti = 0; i <(verCnt-2)*3; ++i)
indices_[i] = indices[i];
memset(colors_, 255,sizeof(unsigned char)*verCnt*4);
verCnt_ = verCnt;
translate(getCenter());
return true;
//计算中点
CCPointcPolySprite::getCenter()
if(!vertexs_) return ccp(0,0);
float minx =vertexs_[0].x,0); margin:0px"> maxx = vertexs_[0].x,0); margin:0px"> miny = vertexs_[0].y,0); margin:0px"> maxy = vertexs_[0].y;
//计算所有顶点坐标的中心点坐标
for(inti = 0; i <verCnt_; ++i) {
minx =minx>vertexs_[i].x?vertexs_[i].x:minx;
maxx =maxx
miny =miny>vertexs_[i].y?vertexs_[i].y:miny;
maxy =maxy
returnccp((minx+maxx)*0.5,(miny+maxy)*0.5);
void cPolySprite::translate(const cocos2d::CCPoint&pos)
//设置锚点
setAnchorPoint(ccp(pos.x/rc.width,pos.y/rc.height));
void cPolySprite::drawPoly()
CC_NODE_DRAW_SETUP();
ccGLBlendFunc( m_sBlendFunc.src,m_sBlendFunc.dst );
if(m_pobTexture != NULL) {
ccGLBindTexture2D( m_pobTexture->getName() );
else {
ccGLBindTexture2D(0);
ccGLEnableVertexAttribs(kCCVertexAttribFlag_PosColorTex);
//顶点，纹理，颜色
glVertexAttribPointer(kCCVertexAttrib_Position,2,GL_FLOAT,GL_FALSE,0,vertexs_);
glVertexAttribPointer(kCCVertexAttrib_TexCoords,uvs_);
glVertexAttribPointer(kCCVertexAttrib_Color,4,GL_UNSIGNED_BYTE,GL_TRUE,colors_);
//根据索引draw三角形
glDrawElements(GL_TRIANGLES,(verCnt_-2)*3,GL_UNSIGNED_SHORT,indices_);
CC_INCREMENT_GL_DRAWS(1);
void cPolySprite::releasePoly()
CC_SAFE_DELETE(vertexs_);
CC_SAFE_DELETE(uvs_);
CC_SAFE_DELETE(indices_);
CC_SAFE_DELETE(colors_);
void cPolySprite::draw(void)
drawPoly();
//示例
//CCPoint p[] ={ccp(0,1.0),ccp(0.3,0.3),ccp(0.4,0.4),0.2)};
//int index[] = {0,1,3,2,3};
//cPolySprite *csp =cPolySprite::create("HelloWorld.png",p,4,index);
有点笨拙，但是还能用，需要注意的地方就是坐标系，纹理坐标左上角为原点，屏幕坐标左下角是原点。
渲染了个四边形贴图：
原文地址：http://blog.sina.com.cn/s/blog_62b2318d0101du43.html
