openGL 初试 绘制三角形 和添加鼠标键盘事件

code：

 

#include <gl/glut.h>

#include <stdlib.h>



void render(void);

void keyboard(unsigned char c,int x,int y);

void mouse(int button,int state,int x,int y);



int main(int argc , char** argv){

	glutInit(&argc,argv);

	glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);

	glutInitWindowPosition(100,100);

	glutInitWindowSize(640,480);

	glutCreateWindow("simple glut application");



	glutDisplayFunc(render);

	glutKeyboardFunc(keyboard);

	glutMouseFunc(mouse);



	glutMainLoop();

}



//鼠标事件

void mouse(int button,int state,int x,int y){

	if(button == GLUT_RIGHT_BUTTON ){

		exit(0);

	}

}



//键盘事件

void keyboard(unsigned char c,int x,int y){

	if(c==27){

		exit(0);

	}

}



void render(void){

	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);



	glBegin(GL_TRIANGLES);



	//分别设置三点的颜色是整体产生变化色



	//设置颜色

	glColor3f(1,0,0);

	//绘制点

	glVertex2f(-0.5,-0.5);

	//设置颜色

	glColor3f(0,1,0);

	//绘制点

	glVertex2f(0.5,-0.5);

	//设置颜色

	glColor3f(0,0,1);

	//绘制点

	glVertex2f(0.0,0.5);



	glEnd();



	glutSwapBuffers();



}

 

 

效果：