구차니의 잡동사니 모음

#include "windows.h"
#include "GL/gl.h"
#include "GL/glu.h"
#include "GL/glut.h"

static int year = 0, day = 0;

void display(void)
{
	glClear(GL_COLOR_BUFFER_BIT);
	glColor3f(1.0, 1.0, 1.0);

	glPushMatrix();
		glutWireSphere(1.0, 20, 16);   /* draw sun */

		glRotatef((GLfloat) year, 0.0, 1.0, 0.0);
		glTranslatef(2.0, 0.0, 0.0);
		glRotatef((GLfloat) day, 0.0, 1.0, 0.0);
		glutWireSphere(0.2, 10, 8);    /* draw smaller planet */
	glPopMatrix();

	glutSwapBuffers();
}

void reshape(int w, int h)
{
	glViewport(0, 0, (GLsizei) w, (GLsizei) h); 
	glMatrixMode(GL_PROJECTION);
		glLoadIdentity();
		gluPerspective(60.0, (GLfloat) w/(GLfloat) h, 1.0, 20.0);
	
	glMatrixMode(GL_MODELVIEW); //GL_PROJECTION
		glLoadIdentity();
		gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
}

void keyboard(unsigned char key, int x, int y)
{
	switch (key)
	{
	  case 'd':
		  day = (day + 10) % 360;
		  glutPostRedisplay();
		  break;
	  case 'D':
		  day = (day - 10) % 360;
		  glutPostRedisplay();
		  break;
	  case 'y':
		  year = (year + 5) % 360;
		  glutPostRedisplay();
		  break;
	  case 'Y':
		  year = (year - 5) % 360;
		  glutPostRedisplay();
		  break;
	  default:
		  break;
	}
}

int main(int argc, char** argv)
{
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
	glutInitWindowSize(500, 500); 
	glutInitWindowPosition(100, 100);
	glutCreateWindow(argv[0]);

	glClearColor(0.0, 0.0, 0.0, 0.0);
	glShadeModel(GL_FLAT); //GL_SMOOTH

	glutDisplayFunc(display); 
	glutReshapeFunc(reshape);
	glutKeyboardFunc(keyboard);
	glutMainLoop();
	return 0;
}