Month: July 2008

I have created a simple Solar System using OpenGL

#include <stdlib.h>
#include <GLUT/glut.h>
#include <math.h>
#include <stdio.h>

static float Xvalue = 0.0, Yvalue = 0.0, Angle = 0.0;

int MoveX = 0;
int MoveY = 0;

void myInit(void) {
 glClearColor (0.0, 0.0, 0.0, 0.0);
}


static float x1[360][2];
static float x2[360][2];
static float x3[720][2];


void generateCircle()
{
 int i = 0;
 
  for(i=0; i <= 360; i++)
  {
   x1[i][0] = sin(i*3.1416/180)*3;
   x1[i][1] = cos(i*3.1416/180)*3;
  }
 
 for(i=0; i <= 360; i++)
 {
  x2[i][0] = sin(i*3.1416/180)*1;
  x2[i][1] = cos(i*3.1416/180)*1;
 }
 
 for(i=0; i <= 720; i++)
 {
  x3[i][0] = sin(i*3.1416/180)*5;
  x3[i][1] = cos(i*3.1416/180)*5;
 }
 
}




void myDisplay(void) {
 
 glClear (GL_COLOR_BUFFER_BIT);
 glColor3f (1.0, 1.0, 1.0);
 
 //sun
 glPushMatrix();
 gluLookAt (0.0, 10.0, 2.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0);
 glTranslatef(Xvalue, 0.0, Yvalue);
 glRotatef(Angle, 0.0, 0.0, 1.0);
 glutWireSphere (0.5, 15, 15);
 glPopMatrix();
 
 glPushMatrix();
 gluLookAt (0.0, 10.0, 2.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0);
 if(MoveX==360)
  MoveX = 0;
 glTranslatef(x1[MoveX][1], x1[MoveX][0], 0.0);
 glRotatef(Angle, 0.0, 0.0, 1.0);
 glutWireSphere (0.4, 15, 15);
 glTranslatef(x2[MoveX][0], x2[MoveX][1], 0.0);
 glutWireSphere (0.2, 15, 15);
 glPopMatrix();
 
 glPushMatrix();
 gluLookAt (0.0, 10.0, 2.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0);
 if(MoveY==720)
  MoveY = 0;
 glTranslatef(x3[MoveY/2][1], x3[MoveY/2][0], 0.0);
 glRotatef(Angle, 0.0, 0.0, 1.0);
 glutWireSphere (0.4, 15, 15);
 int i = 0;
 //glBegin(GL_LINE_STRIP);
 glBegin(GL_QUAD_STRIP);
 for(i=0; i <= 360; i++)
 {
  glVertex3f(sin(i*3.1416/180)*0.5, cos(i*3.1416/180)*0.5, 0 );
  glVertex3f(sin(i*3.1416/180)*0.7, cos(i*3.1416/180)*0.7, 0 );
 }
 glEnd();
 glRotatef(Angle, 0.0, 0.0, 1.0);
 glPopMatrix();
 
 glFlush ();
}


void resize(int w, int h)
{
 glViewport (0, 0, (GLsizei) w, (GLsizei) h); 
 glMatrixMode (GL_PROJECTION);
 glLoadIdentity ();
 glFrustum (-1.0, 1.0, -1.0, 1.0, 1.5, 20.0);
 glMatrixMode (GL_MODELVIEW);
 glLoadIdentity ();
}


void animation()
{
 Angle += 15.0;
 glutPostRedisplay();
 MoveX +=1;
 MoveY +=1;
 glutPostRedisplay();
 glutTimerFunc(100, animation, 0);
 
}


int main(int argc, char ** argv){
 
 glutInit(&argc, argv);
 glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
 glutInitWindowSize(1024, 768);
 glutInitWindowPosition(100, 150);
 glutCreateWindow("OpenGL");
 myInit();
 glutDisplayFunc(myDisplay);
 glutReshapeFunc(resize);  
 generateCircle();
 glutTimerFunc(100, animation, 0);
 glutMainLoop();
}