Draw a solid sphere using openGL

msi_333 · Sun Feb 19, 2012 8:00 pm

In this example we draw a simple and fixed colored solid sphere using OpenGL and GLU . glutSolidSphere function is used.

Code:

#include <GL\glut.h>

GLfloat xRotated, yRotated, zRotated;
GLdouble radius=1;


void display(void);
void reshape(int x, int y);
 

int main (int argc, char **argv)
{
    glutInit(&argc, argv); 
    glutInitWindowSize(350,350);
    glutCreateWindow("Solid Sphere");
    xRotated = yRotated = zRotated = 30.0;
    xRotated=43;
    yRotated=50;
 
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutMainLoop();
    return 0;
}

void display(void)
{

    glMatrixMode(GL_MODELVIEW);
    // clear the drawing buffer.
    glClear(GL_COLOR_BUFFER_BIT);
    // clear the identity matrix.
    glLoadIdentity();
    // traslate the draw by z = -4.0
    // Note this when you decrease z like -8.0 the drawing will looks far , or smaller.
    glTranslatef(0.0,0.0,-5.0);
    // Red color used to draw.
    glColor3f(0.9, 0.3, 0.2); 
    // changing in transformation matrix.
    // rotation about X axis
    glRotatef(xRotated,1.0,0.0,0.0);
    // rotation about Y axis
    glRotatef(yRotated,0.0,1.0,0.0);
    // rotation about Z axis
    glRotatef(zRotated,0.0,0.0,1.0);
    // scaling transfomation 
    glScalef(1.0,1.0,1.0);
    // built-in (glut library) function , draw you a sphere.
    glutSolidSphere(radius,20,20);
    // Flush buffers to screen
     
    glFlush();        
    // sawp buffers called because we are using double buffering 
   // glutSwapBuffers();
}

void reshape(int x, int y)
{
    if (y == 0 || x == 0) return;   
    glMatrixMode(GL_PROJECTION);  
    glLoadIdentity(); 
    gluPerspective(39.0,(GLdouble)x/(GLdouble)y,0.6,21.0);
    glMatrixMode(GL_MODELVIEW);
    glViewport(0,0,x,y);  //Use the whole window for rendering
}
 

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Draw a solid sphere using openGL

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