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View Full Version : help adding glutWireSphere to this code



jaffacakes
01-07-2009, 04:51 AM
i would like add a glutWireSphere (MOON) to this code that will allow it to rotate around the earth sphere when the key 'm' is pressed

what code would i add help much appreciated

#include <GL/glut.h>
#include <stdlib.h>

#define SUN_RADIUS 1.0
#define PLANET_RADIUS 0.2
static int year = 0, day = 0;

void init(void)
{
glClearColor (0.0, 0.0, 0.0, 0.0);
glShadeModel (GL_FLAT);
}

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

glPushMatrix();
glutWireSphere(SUN_RADIUS, 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(PLANET_RADIUS, 10, 8); /* draw earth */
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);
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;
case 27:
exit(0);
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]);
init ();
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutKeyboardFunc(keyboard);
glutMainLoop();
return 0;
}

dletozeun
01-07-2009, 11:05 AM
We are not here to do your homework or whatever. You have already did it for the earth and the sun, so just think a bit more and it will work.