自绘
如果需要自定义绘制，重写node的绘制函数draw.
新建工程，testDraw.
修改HelloWorldScene.h
#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__
#include "cocos2d.h"
class HelloWorld : public cocos2d::CCLayer
{
public:
// Method 'init' in cocos2d-x returns bool, instead of 'id' in cocos2d-iphone (an object pointer)
virtual bool init();
// there's no 'id' in cpp, so we recommend to return the class instance pointer
static cocos2d::CCScene* scene();
virtual void draw();
// preprocessor macro for "static create()" constructor ( node() deprecated )
CREATE_FUNC(HelloWorld);
};
#endif // __HELLOWORLD_SCENE_H__
修改HelloWorldScene.cpp
#include "HelloWorldScene.h"
#include "SimpleAudioEngine.h"
using namespace cocos2d;
using namespace CocosDenshion;
CCScene* HelloWorld::scene()
{
// 'scene' is an autorelease object
CCScene *scene = CCScene::create();
// 'layer' is an autorelease object
HelloWorld *layer = HelloWorld::create();
// add layer as a child to scene
scene->addChild(layer);
// return the scene
return scene;
}
// on "init" you need to initialize your instance
bool HelloWorld::init()
{
//////////////////////////////
// 1. super init first
if ( !CCLayer::init() )
{
return false;
}
return true;
}
void HelloWorld::draw()
{
CCSize s=CCDirector::sharedDirector()->getWinSize();
//设置颜色
ccDrawColor4B(255, 0, 0, 255);
//设置线的宽度
glLineWidth(2);
//绘制一条直线
ccDrawLine(ccp(0, 0), ccp(s.width*0.5,s.height*0.5));
ccDrawColor4B(255, 255, 0, 0);
//设置像素尺寸
ccPointSize(30);
//绘制一个点
ccDrawPoint(ccp(s.width*0.5, s.height*0.5));
ccDrawColor4B(0, 0, 255, 0);
//绘制圆形
ccDrawCircle(ccp(s.width/2, s.height/2), 50, CC_DEGREES_TO_RADIANS(90), 50, false);
ccDrawCircle(ccp(s.width/2, s.height/2), 50, CC_DEGREES_TO_RADIANS(45), 6, false);
ccDrawColor4B(0, 255, 255, 255);
glLineWidth(5);
//绘制多边形
CCPoint vertices[]={ccp(70,150),ccp(150,150),ccp(150,200),ccp(190,300)};
ccDrawPoly(vertices, 4, true);
ccDrawColor4B(255, 0, 255, 255);
//绘制填充多边形
CCPoint filledVertices[]={ccp(0,120),ccp(50,120),ccp(50,170),ccp(25,200),ccp(0,170)};
ccDrawSolidPoly(filledVertices, 5, ccc4f(0.5f, 0.5f, 1, 1));
//绘制贝塞尔曲线
ccDrawQuadBezier(ccp(0,s.height), ccp(s.width/2,s.height/2), ccp(s.width,s.height), 50);
//绘制立体的贝塞尔曲线
ccDrawCubicBezier(ccp(s.width/2,s.height/2), ccp(s.width/2+30,s.height/2+50), ccp(s.width/2+60,s.height/2-50), ccp(s.width,s.height/2),100);
//绘制填充矩形
ccDrawSolidRect(ccp(240,50), ccp(300,10), ccc4f(255, 177, 177, 255));
}