c++ opengl 三角形代码

• 这个是非着色器语言的编程
• glEnd();glFlush();看起来是必备的
• glBegin(GL_TRIANGLES);是图元装配

#include<gl/glut.h>
void renderWindow(void) {
	glClear(GL_COLOR_BUFFER_BIT);
	glColor3f(1, 0, 0);
	glBegin(GL_TRIANGLES);
	glVertex2f(-.5f, -.5f);
	glVertex2d(.5f, -.5f);
	glVertex2f(.0f, .5f);
	glEnd();
	glFlush();
}
int main(int argc, char* argv[]) {
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
	glutInitWindowPosition(1, 1);
	glutInitWindowSize(720, 720);
	glutCreateWindow("hello opengl!");
	glutDisplayFunc(&renderWindow);
	glutMainLoop();
	return 0;
}