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();
}