#include <GL/glut.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#define RADDEG 57.29577951f
float XUP[3] = {1,0,0},
YUP[3] = {0,1,0},
ZUP[3] = {0,0,1},
ORG[3] = {0,0,0};
GLfloat viewangle = 0, tippangle = 0;
GLfloat d[3] = {0.1, 0.1, 0.1};
GLfloat xAngle = 0.0, yAngle = 0.0, zAngle = 0.0;
// Use arrow keys to rotate entire scene
void Special_Keys (int key, int x, int y)
{
switch (key)
{
case GLUT_KEY_LEFT : viewangle -= 5; break;
case GLUT_KEY_RIGHT: viewangle += 5; break;
case GLUT_KEY_UP : tippangle -= 5; break;
case GLUT_KEY_DOWN : tippangle += 5; break;
default: printf (" Special key %c == %d\n", key, key);
}
glutPostRedisplay();
}
void Keyboard (unsigned char key, int x, int y)
{
switch (key)
{
case 'b' : d[0] += 0.1; break; //x
case 'n' : d[1] += 0.1; break; //y
case 'm' : d[2] += 0.1; break; //z
case 'x' : xAngle += 5; break;
case 'y' : yAngle += 5; break;
case 'z' : zAngle += 5; break;
default: printf (" Keyboard %c == %d\n", key, key);
}
glutPostRedisplay();
}
void Triad (void)
{
glColor3f (1.0, 1.0, 1.0);
glBegin (GL_LINES);
glVertex3fv (ORG);
glVertex3fv (XUP); //x-axix
glVertex3fv (ORG);
glVertex3fv (YUP); //y-axix
glVertex3fv (ORG);
glVertex3fv (ZUP); //z-axix
glEnd ();
glRasterPos3f (1.1, 0.0, 0.0);
glutBitmapCharacter (GLUT_BITMAP_HELVETICA_18, 'X');
glRasterPos3f (0.0, 1.1, 0.0);
glutBitmapCharacter (GLUT_BITMAP_HELVETICA_18, 'Y');
glRasterPos3f (0.0, 0.0, 1.1);
glutBitmapCharacter (GLUT_BITMAP_HELVETICA_18, 'Z');
}
void Draw_Box (void)
{
glBegin (GL_QUADS);
glColor3f ( 0.0, 0.7, 0.1); // Front - green
glVertex3f (-1.0, 1.0, 1.0);
glVertex3f ( 1.0, 1.0, 1.0);
glVertex3f ( 1.0, -1.0, 1.0);
glVertex3f (-1.0, -1.0, 1.0);
glColor3f ( 0.9, 1.0, 0.0); // Back - yellow
glVertex3f (-1.0, 1.0, -1.0);
glVertex3f ( 1.0, 1.0, -1.0);
glVertex3f ( 1.0, -1.0, -1.0);
glVertex3f (-1.0, -1.0, -1.0);
glColor3f ( 0.2, 0.2, 1.0); // Top - blue
glVertex3f (-1.0, 1.0, 1.0);
glVertex3f ( 1.0, 1.0, 1.0);
glVertex3f ( 1.0, 1.0, -1.0);
glVertex3f (-1.0, 1.0, -1.0);
glColor3f ( 0.7, 0.0, 0.1); // Bottom - red
glVertex3f (-1.0, -1.0, 1.0);
glVertex3f ( 1.0, -1.0, 1.0);
glVertex3f ( 1.0, -1.0, -1.0);
glVertex3f (-1.0, -1.0, -1.0);
glEnd();
}
void redraw (void)
{
int v;
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable (GL_DEPTH_TEST);
glLoadIdentity ();
glTranslatef (0, 0, -3);
glRotatef (tippangle, 1,0,0); // Up and down arrow keys 'tip' view.
glRotatef (viewangle, 0,1,0); // Right/left arrow keys 'turn' view.
// glDisable (GL_LIGHTING);
Triad ();
// glPushMatrix ();
glTranslatef (d[0], d[1], d[2]);
// Move box down X axis.
glScalef (0.2, 0.2, 0.2);
glRotatef (zAngle, 0,0,1);
glRotatef (yAngle, 0,1,0);
glRotatef (xAngle, 1,0,0);
Draw_Box ();
//glPopMatrix ();
glutSwapBuffers();
}
int main (int argc, char **argv)
{
glutInit(&argc, argv);
glutInitWindowSize (900, 600);
glutInitWindowPosition (300, 300);
glutInitDisplayMode (GLUT_DEPTH | GLUT_DOUBLE);
glutCreateWindow ("3D Cube Rotation(press arrows and x y z keys)");
glutDisplayFunc( redraw );
glutKeyboardFunc ( Keyboard );
glutSpecialFunc (Special_Keys);
//glClearColor (0.1, 0.0, 0.1, 1.0);
glMatrixMode (GL_PROJECTION);
gluPerspective (60, 1.5, 1, 10);
glMatrixMode (GL_MODELVIEW);
glutMainLoop ();
return 1;
}
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