what is code to draw sun and earth and the moon in java Open

what is code to draw sun and earth and the moon in java OpenGL?

Solution

#include <gl\\glut.h>

#define SunSize 0.5

#define EarthSize 0.10

#define MoonSize 0.05

GLfloat SpeedMultiplicator = 1.0;

GLfloat DaysPerYear = 10.0;

GLfloat year = 0.0;   //degrees

GLfloat day = 0.0;

GLfloat moonAroundEarth = 0.0;

GLfloat moonItsSelf = 0.0;

GLfloat EarthOrbitRadius = 1.25;

GLfloat MoonOrbitRadius = 0.20;

GLfloat daySpeed = 5.0 * SpeedMultiplicator;

GLfloat yearSpeed = DaysPerYear / 360.0 * daySpeed * SpeedMultiplicator;

GLfloat moonAroundEarthSpeed = 1.25 * SpeedMultiplicator;

GLfloat moonItsSelfSpeed = 1 * SpeedMultiplicator;

void RenderScene(void)

{

            glPushMatrix();

            // To rotate around drawn object

            gluLookAt(0.0,0.0,-4.0,0.0,0.0,1.0,0.0,-3.0,0.0);

            glColor3f(1.0,1.0,0.0);

            glutSolidSphere(SunSize,50,50);   // Display Sun as solid object

            glRotatef(year,0.0,1.0,0.0); // Rotation of Earth around Sun

            glTranslatef(EarthOrbitRadius,0.0,0.0);

            glPushMatrix();

            glRotatef(day,0.25,1.0,0.0);

                       

glColor3f(0.0,0.0,1.0);

            glutSolidSphere(EarthSize,10,10);   //Display Earth as a solid object

            glPopMatrix();

            // Rotation of Moon around Earth

glRotatef(moonAroundEarth,0.0,1.0,0.0);                                                                            glTranslatef(MoonOrbitRadius,0.0,0.0);

            glRotatef(moonItsSelf,0.0,1.0,0.0);

                                   

            glColor3f(1.0,1.0,1.0);

            glutSolidSphere(MoonSize,8,8); //Display Moon as a solid object

            glPopMatrix();                    

            glPopMatrix();

}

void Init(void)

{

            glClearColor(0.0,0.0,0.0,0.0);

            glClearDepth(10.0);

            glMatrixMode(GL_MODELVIEW);

            glLoadIdentity();

}

void Display(void)

{

            glClear(GL_COLOR_BUFFER_BIT);

            RenderScene();

            glFlush();

            glutSwapBuffers();

}

void Reshape(int x, int y)

{

            if (y == 0) return;

            glMatrixMode(GL_PROJECTION);

            glLoadIdentity();

            gluPerspective(40.0,(GLdouble)x/(GLdouble)y,0.5,20.0);

            glMatrixMode(GL_MODELVIEW);

            glViewport(0,0,x,y);

            Display();

}

void Idle(void)

{

            day += daySpeed;

            year += yearSpeed;

            moonItsSelf += moonItsSelfSpeed;

            moonAroundEarth += moonAroundEarthSpeed;

            Display();

}

int main(int argc, char* argv[])

{

            glutInit(&argc, argv);

            glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);

            glutInitWindowSize(700,700);

            glutCreateWindow(\"PRACTICAL4\");

            Init();

            glutReshapeFunc(Reshape);

            glutDisplayFunc(Display);

            glutIdleFunc(Idle);

            glutMainLoop();

            return 0;

}