DrawPrimitivesTest

#ifndef _DRAW_PRIMITIVES_TEST_H_

#define _DRAW_PRIMITIVES_TEST_H_



////----#include "cocos2d.h"

#include "../testBasic.h"



class DrawPrimitivesTest : public CCLayer

{

public:

    DrawPrimitivesTest();

    virtual void draw();//必须重写这个函数，画图要在这函数中画

};



class DrawPrimitivesTestScene : public TestScene

{

public:

    virtual void runThisTest();

};



#endif

void DrawPrimitivesTest::draw()

{

    CHECK_GL_ERROR_DEBUG();



    // draw a simple line

    // The default state is:

    // Line Width: 1

    // color: 255,255,255,255 (white, non-transparent)

    // Anti-Aliased

    //    glEnable(GL_LINE_SMOOTH);

    ccDrawLine( VisibleRect::leftBottom(), VisibleRect::rightTop() );//画线



    CHECK_GL_ERROR_DEBUG();



    // line: color, width, aliased

    // glLineWidth > 1 and GL_LINE_SMOOTH are not compatible

    // GL_SMOOTH_LINE_WIDTH_RANGE = (1,1) on iPhone

    //    glDisable(GL_LINE_SMOOTH);

    glLineWidth( 5.0f );//设置线宽

    ccDrawColor4B(255,0,0,255);//设置线的颜色

    ccDrawLine( VisibleRect::leftTop(), VisibleRect::rightBottom() );



    CHECK_GL_ERROR_DEBUG();



    // TIP:

    // If you are going to use always the same color or width, you don't

    // need to call it before every draw

    //

    // Remember: OpenGL is a state-machine.



    // draw big point in the center

    ccPointSize(64);//设置点的大小

    ccDrawColor4B(0,0,255,128);

    ccDrawPoint( VisibleRect::center() );//画点



    CHECK_GL_ERROR_DEBUG();



    // draw 4 small points

    CCPoint points[] = { ccp(60,60), ccp(70,70), ccp(60,70), ccp(70,60) };

    ccPointSize(4);

    ccDrawColor4B(0,255,255,255);

    ccDrawPoints( points, 4);//画4个点



    CHECK_GL_ERROR_DEBUG();



    // draw a green circle with 10 segments

    glLineWidth(16);

    ccDrawColor4B(0, 255, 0, 255);

    ccDrawCircle( VisibleRect::center(), 100, 0, 10, false);//画圆



    CHECK_GL_ERROR_DEBUG();



    // draw a green circle with 50 segments with line to center

    glLineWidth(2);

    ccDrawColor4B(0, 255, 255, 255);

    ccDrawCircle( VisibleRect::center(), 50, CC_DEGREES_TO_RADIANS(90), 50, true);//第一个参数：圆点，第二个参数：半径，第三个参数：角度，第四个参数：，第五个参数：是否填充



    CHECK_GL_ERROR_DEBUG();



    // open yellow poly

    ccDrawColor4B(255, 255, 0, 255);

    glLineWidth(10);

    CCPoint vertices[] = { ccp(0,0), ccp(50,50), ccp(100,50), ccp(100,100), ccp(50,100) };

    ccDrawPoly( vertices, 5, false);//画线段，false表示不封闭



    CHECK_GL_ERROR_DEBUG();

    

    // filled poly

    glLineWidth(1);

    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 ) );//对点集所围成的范围填充相应颜色



    // closed purble poly

    ccDrawColor4B(255, 0, 255, 255);

    glLineWidth(2);

    CCPoint vertices2[] = { ccp(30,130), ccp(30,230), ccp(50,200) };

    ccDrawPoly( vertices2, 3, true);//画线段，并且收尾两点要封闭



    CHECK_GL_ERROR_DEBUG();



    // draw quad bezier path

    ccDrawQuadBezier(VisibleRect::leftTop(), VisibleRect::center(), VisibleRect::rightTop(), 50);//画贝塞尔曲线



    CHECK_GL_ERROR_DEBUG();



    // draw cubic bezier path

    ccDrawCubicBezier(VisibleRect::center(), ccp(VisibleRect::center().x+30,VisibleRect::center().y+50), ccp(VisibleRect::center().x+60,VisibleRect::center().y-50),VisibleRect::right(),100);



    CHECK_GL_ERROR_DEBUG();

    

    //draw a solid polygon

    CCPoint vertices3[] = {ccp(60,160), ccp(70,190), ccp(100,190), ccp(90,160)};

    ccDrawSolidPoly( vertices3, 4, ccc4f(1,1,0,1) );//4条线段,并填充相应颜色



    // restore original values

    glLineWidth(1);

    ccDrawColor4B(255,255,255,255);

    ccPointSize(1);



    CHECK_GL_ERROR_DEBUG();

}