OpenGL画线与点并且控制大小

转载自： http://hi.baidu.com/warrially/item/5f60648259b142cdee083d61
//==============================================================================

// GL画图开头

//==============================================================================

glColor3f(1.0,0.0,0.0); //设置颜色为红 RGB（255,0,0）

glPointSize( 10 );//设置点的大小为10 glBegin( GL_POINTS); //画点

glVertex2i(0,1); //起始点

glVertex2i(0,-1); //终结点

glEnd();

glColor3f(0.0,1.0,0.0); //设置颜色为绿色

glLineWidth( 6 );//设置线的宽度为6 glBegin( GL_LINES); //画线

glVertex2i(1,1); //起始线段

glColor3f(0.0,1.0,1.0); //设置颜色为青绿

glVertex2i(-1,-1); //终止线段

glColor3f(1.0,1.0,0.0); //设置颜色为黄

glVertex2i(1,-1); //起始线段

glColor3f(1.0,0.0,1.0); //设置颜色为紫红

glVertex2i(-1,1); //终止线段

glEnd();

//------------------------------------------------------------------------------

// GL画图结尾

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