example.cpp

来自「vc150例源码」· C++ 代码 · 共 90 行

#include "windows.h"
#include "gl/gl.h"
#include "gl/glu.h"
#include "gl/glaux.h" 
#include "conio.h"

void myinit(void); 
void CALLBACK display(void); 
void CALLBACK reshape(GLsizei w,GLsizei h);
static double zAngle=0.0;

void CALLBACK stepDisplay(void) 
{ 
	//系统闲时的调用过程 
	zAngle=zAngle+1; 
	if(zAngle>360.0)
		zAngle=0.0; 
	display(); 
} 

void CALLBACK mousedown(AUX_EVENTREC * m) 
{ 
	auxIdleFunc(stepDisplay); 
}

void CALLBACK mouseup(AUX_EVENTREC * m) 
{ 
	auxIdleFunc(0); 
}

void myinit(void) 
{ 
	auxInitDisplayMode(AUX_SINGLE|AUX_RGBA); 
	auxInitPosition(0,0,200,200); 
	auxInitWindow("Example"); 
}

void CALLBACK reshape(GLsizei w,GLsizei h) 
{ 
	if (w>h)
		glViewport(0,0,h,h); 
	else
		glViewport(0,0,w,w); 
}

void draw()
{
	glBegin(GL_TRIANGLE_STRIP);
	//画连续填充的多个三角 
	glColor3f(1.0,0.0,0.0); 
	glVertex3f(0.8,-0.5,0.0); 
	glColor3f(0.0,1.0,0.0); 
	glVertex3f(-0.8,-0.5,0.0); 
	glColor3f(0.0,0.0,1.0); 
	glVertex3f(0.0,0.8,0.8); 
	//第一个三角 

	glColor3f(0.0,1.0,1.0); 
	glVertex3f(0.6,0.8,-0.8); 
	//第二个三角 

	glColor3f(1.0,1.0,0.0); 
	glVertex3f(0.8,-0.5,0.0); 
	//第三个三角 

	glEnd(); 
	glFlush(); 
}

void CALLBACK display(void) 
{ 
	glClearColor(255.0,255.0,255.0,0.0); 
	glClear(GL_COLOR_BUFFER_BIT); 
	glLoadIdentity(); 
	glRotatef(zAngle,0.0,0.0,1.0); 
	draw(); 
}


void main(void) 
{ 
	myinit(); 
	auxMouseFunc(AUX_LEFTBUTTON,AUX_MOUSEDOWN,mousedown); 	
	auxMouseFunc(AUX_LEFTBUTTON,AUX_MOUSEUP,mouseup); 	
	auxReshapeFunc(reshape); 
	auxMainLoop(display); 
}