codice:
#include <windows.h>
#include <gl/glut.h>
#include <math.h>
#define NESSUN_MOVIMENTO 0;
#define MOVIMENTO 1;
void drawRubikCube(GLfloat edge);
static int stato=NESSUN_MOVIMENTO;
static int lastMousePos[2];
GLfloat arrowXrot=0.0;
GLfloat arrowYrot=0.0;
GLfloat arrowZrot=0.0;
int semaforo[3];
void init(void)
{
int i;
/* Abilita il Culling e il Depth testing */
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
/* Imposta lo smooth shading */
glShadeModel(GL_SMOOTH);
/* colore di sfondo nero */
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
for(i=0; i<3; i++)
semaforo[i]=0;
}
void oscilla()
{
GLfloat offset=0.1;
GLfloat maxAngleSize=15.0;
static GLfloat angle=90.0;
static GLfloat angleOld;
GLfloat zRot=sin(angle)*3;
GLfloat xRot=cos(angle)*3;
angleOld=angle+offset;
glRotatef(zRot, 0.0, 0.0, 1.0);
glRotatef(xRot, 0.0, 1.0, 0.0);
/* imposta un leggero movimento oscillatorio di default */
if(angleOld-angle > 0 && angle > -maxAngleSize)
{
angle-=offset;
angleOld-=offset;
}
else if(angle <= maxAngleSize)
{
if(angle < -maxAngleSize)
angle+=offset;
else
{
angle+=offset;
angleOld+=offset;
}
}
else
angleOld+=offset;
}
void timer(int valore)
{
switch(valore)
{case 0:
glutPostRedisplay();
glutTimerFunc(100, timer, 0);
break;
}
}
void mouseFunc(int button, int state, int x, int y)
{
switch (button)
{
case GLUT_LEFT_BUTTON:
if (state == GLUT_DOWN)
{
stato = MOVIMENTO;
}
else
{
stato = NESSUN_MOVIMENTO;
}
break;
}
}
void moveLeftOrRight(int x)
{
glMatrixMode(GL_MODELVIEW);
glTranslatef(x, 0.0, 0.0);
}
void moveUpOrDown(int y)
{
glMatrixMode(GL_MODELVIEW);
glTranslatef(0.0, y, 0.0);
}
void mouseMove(int actualX, int actualY)
{
int spostamentoX = lastMousePos[0] - actualX;
int spostamentoY = lastMousePos[1] - actualY;
lastMousePos[0] = actualX;
lastMousePos[1] = actualY;
if (stato == MOVIMENTO)
{
moveLeftOrRight(spostamentoX);
moveUpOrDown(spostamentoY);
}
}
void specialKeyboard(int key, int x, int y)
{
if(key == GLUT_KEY_UP)
{
/*semaforo[0]=1;
semaforo[1]=0;
semaforo[2]=0;*/
arrowXrot-=5;
if(arrowXrot< -360.0)
arrowXrot=0.0;
}
if(key == GLUT_KEY_DOWN)
{
/*semaforo[0]=1;
semaforo[1]=0;
semaforo[2]=0;*/
arrowXrot+=5;
if(arrowXrot > 360.0)
arrowXrot=0.0;
}
if(key == GLUT_KEY_LEFT)
{
/*semaforo[0]=0;
semaforo[1]=1;
semaforo[2]=0;*/
arrowYrot-=5;
if(arrowYrot < -360.0)
arrowYrot=0.0;
}
if(key == GLUT_KEY_RIGHT)
{
/*semaforo[0]=0;
semaforo[1]=1;
semaforo[2]=0;*/
arrowYrot+=5;
if(arrowYrot > 360.0)
arrowYrot=0.0;
}
if(key == GLUT_KEY_PAGE_DOWN)
{
/*semaforo[0]=0;
semaforo[1]=0;
semaforo[2]=1;*/
arrowZrot-=5;
if(arrowZrot < -360.0)
arrowZrot=0.0;
}
if(key == GLUT_KEY_END)
{
/*semaforo[0]=0;
semaforo[1]=0;
semaforo[2]=1;*/
arrowZrot+=5;
if(arrowZrot > 360.0)
arrowZrot=0.0;
}
/* Aggiorna l'immagine */
glutPostRedisplay();
}
void drawGround(void)
{
glBegin(GL_QUADS);
glColor3ub(0, 0, 0);
glVertex3f(600.0f, -50.0f, -400.0f);
glVertex3f(-600.0f, -50.0f, -400.0f);
glColor3ub(200, 200, 200);
glVertex3f(-600.0f, -50.0f, -20.0f);
glVertex3f(600.0f, -50.0f, -20.0f);
glEnd();
}
void drawColumn(int direzione, GLfloat spostamento, GLfloat lato)
{
switch(direzione)
{
case 1:
glTranslatef(spostamento, 0.0, 0.0);
break;
case -1:
glTranslatef(-spostamento, 0.0, 0.0);
break;
case 3:
glTranslatef(0.0, 0.0, spostamento);
break;
case -3:
glTranslatef(0.0, 0.0, -spostamento);
break;
}
glutWireCube(lato);
glPushMatrix();
glTranslatef(0.0, spostamento, 0.0);
glutWireCube(lato);
glPopMatrix();
glPushMatrix();
glTranslatef(0.0, -spostamento, 0.0);
glutWireCube(lato);
glPopMatrix();
}
void drawRubikCube(GLfloat edge)
{
/* salva la posizione corrente e spostati in alto per disegnare il cubo */
glPushMatrix();
glTranslatef(0.0, edge, 0.0);
glColor3ub(255, 0, 0);
glutWireCube(edge);
glColor3ub(0, 255, 0);
/* ripristina la posizione iniziale */
glPopMatrix();
/* salva la posizione corrente e spostati in basso per disegnare il cubo */
glPushMatrix();
glTranslatef(0.0, -edge, 0.0);
glutWireCube(edge);
/* ripristina la posizione iniziale */
glPopMatrix();
drawColumn(1, edge, edge);
drawColumn(3, edge, edge);
drawColumn(-1, edge, edge);
drawColumn(-1, edge, edge);
drawColumn(-3, edge, edge);
drawColumn(-3, edge, edge);
drawColumn(1, edge, edge);
drawColumn(1, edge, edge);
}
void display(void)
{
/* inizializza il color buffer e il depth buffer */
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* d'ora in poi si modifica la matrice modelview*/
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
drawGround();
glTranslatef(0.0, 0.0, -50.0);
glRotatef(45.0, 1.0, 0.0, 0.0);
glRotatef(45.0, 0.0, 1.0, 0.0);
/* SE VENGONO PREMUTE LE FRECCE IL CUBO RUOTA */
/*if(semaforo[0])
{*/
glRotatef(arrowYrot, 0.0, 1.0, 0.0);
glRotatef(arrowZrot, 0.0, 0.0, 1.0);
glRotatef(arrowXrot, 1.0, 0.0, 0.0);
/* }
if(semaforo[1])
{
glRotatef(arrowXrot, 1.0, 0.0, 0.0);
glRotatef(arrowZrot, 0.0, 0.0, 1.0);
glRotatef(arrowYrot, 0.0, 1.0, 0.0);
}
if(semaforo[2])
{
glRotatef(arrowXrot, 1.0, 0.0, 0.0);
glRotatef(arrowYrot, 0.0, 1.0, 0.0);
glRotatef(arrowZrot, 0.0, 0.0, 1.0);
}*/
//oscilla();
drawRubikCube(10.0);
glutSwapBuffers();
}
void reshape(GLsizei w, GLsizei h)
{
GLfloat ratio;
if(h==0)
h=1;
glViewport(0, 0, w, h);
ratio=(GLfloat) w/ (GLfloat) h;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(90.0, ratio, 20.0, 500.0);
//glOrtho(-100.0, 100.0, -75.0, 75.0, 20.0, 300.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
main()
{
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
glutInitWindowSize(800, 600);
glutInitWindowPosition(0, 0);
glutCreateWindow("Prova");
glutTimerFunc(250, timer, 0);
glutDisplayFunc(display);
glutReshapeFunc(reshape);
//glutKeyboardFunc(keyboard);
glutSpecialFunc(specialKeyboard);
glutMouseFunc(mouseFunc);
glutMotionFunc(mouseMove);
init();
glutMainLoop();
}
Rispondi quotando
grazie mille! 
