#include
float pos_camX = 0, pos_camY = 0, pos_camZ = -5; int eye_camX = 0, eye_camY = 0.0, eye_camZ = 0;
float ang_rot1 = 0.0;float a=1.0, b=1.0, c=1.0, d=0.5;
GLfloat Diffuse[]= { 0.5f, 0.5f, 0.5f, 1.0f }; // Diffuse Light ValuesGLfloat Specular[] = { 1.0, 1.0, 1.0, 1.0 }; // Specular Light ValuesGLfloat Position[]= { 0.0f, 3.0f, 0.0f, 1.0f }; // Light PositionGLfloat Position2[]= { 0.0f, 0.0f, -5.0f, 1.0f }; // Light Position
void InitGL ( GLvoid ) // Inicializamos parametros{ glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // Fondo
glLightfv(GL_LIGHT0, GL_POSITION, Position);glPopMatrix();glPopMatrix();glPopMatrix(); glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, Position2); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glEnable ( GL_COLOR_MATERIAL );
glClearDepth(1.0f); // Configuramos Depth Buffer glEnable(GL_DEPTH_TEST); // Habilitamos Depth Testing glDepthFunc(GL_LEQUAL); // Tipo de Depth Testing a realizar glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
}
void cubo (GLenum render) //Funcion creacion prisma{
GLfloat vertice [8][3] = { {0.5 ,-0.5, 0.5}, //Coordenadas V1 {-0.5 ,-0.5, 0.5}, //Coordenadas V2 {-0.5 ,-0.5, -0.5}, //CoordenadasV3 {0.5 ,-0.5, -0.5}, //Coordenadas V4 {0.5 ,0.5, 0.5}, //Coordenadas V5 {0.5 ,0.5, -0.5}, //Coordenadas V6 {-0.5 ,0.5, -0.5}, //Coordenadas V7 {-0.5 ,0.5, 0.5}, //Coordenadas V8 };
glBegin(render); //Frente glNormal3f( 0.0f, 0.0f, 1.0f); glVertex3fv(vertice[0]); glVertex3fv(vertice[4]); glVertex3fv(vertice[7]); glVertex3fv(vertice[1]); glEnd();
glBegin(render); //Lado Derecho glNormal3f( 1.0f, 0.0f, 0.0f); glVertex3fv(vertice[0]); glVertex3fv(vertice[3]); glVertex3fv(vertice[5]); glVertex3fv(vertice[4]); glEnd();
glBegin(render); //Atras glNormal3f( 0.0f, 0.0f,-1.0f); glVertex3fv(vertice[6]); glVertex3fv(vertice[5]); glVertex3fv(vertice[3]); glVertex3fv(vertice[2]); glEnd();
glBegin(render); //Lado Izquierdo glNormal3f(-1.0f, 0.0f, 0.0f); glVertex3fv(vertice[1]); glVertex3fv(vertice[7]); glVertex3fv(vertice[6]); glVertex3fv(vertice[2]); glEnd();
glBegin(render); //Abajo glNormal3f( 0.0f,-1.0f, 0.0f); glVertex3fv(vertice[0]); glVertex3fv(vertice[1]); glVertex3fv(vertice[2]); glVertex3fv(vertice[3]); glEnd();
glBegin(render); //Arriba glNormal3f( 0.0f, 1.0f, 0.0f); glVertex3fv(vertice[4]); glVertex3fv(vertice[5]); glVertex3fv(vertice[6]); glVertex3fv(vertice[7]); glEnd();}
void display ( void ) // Creamos la funcion donde se dibuja{ glClear (GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT); glPushMatrix();
glTranslatef(pos_camX, pos_camY, pos_camZ); glRotatef(eye_camX, 1.0, 0.0, 0.0); glRotatef(eye_camY, 0.0, 1.0, 0.0); glRotatef(eye_camZ, 0.0, 0.0, 1.0);
glPushMatrix(); glTranslatef(-1,0.0,0.0);glRotatef(ang_rot1,0.0,0.0,1.0);glTranslatef(1,0.0,0.0); glPushMatrix();
glScalef(a, b, c); //Escalamiento con variablescubo(GL_POLYGON); glPopMatrix();
glPopMatrix();
glPopMatrix();
glColor3f(0.0,0.0,1.0); glPopMatrix();
glutSwapBuffers ( );
}
void animacion(){ glutPostRedisplay();}
void reshape ( int width , int height ) // Creamos funcion Reshape{ if (height==0) // Prevenir division entre cero { height=1; }
glViewport(0,0,width,height);
glMatrixMode(GL_PROJECTION); // Seleccionamos Projection Matrix glLoadIdentity();
// Tipo de Vista glFrustum (-0.1, 0.1,-0.1, 0.1, 0.1, 50.0);
glMatrixMode(GL_MODELVIEW); // Seleccionamos Modelview Matrix glLoadIdentity();}
void keyboard ( unsigned char key, int x, int y ) // Create Keyboard Function{ switch ( key ) {
//Rotacion case 'r': case 'R': ang_rot1 ++; break;
case 'f': case 'F': ang_rot1 --; break; //Escalamiento case 'g': case 'G': a ++; b ++; c ++; break; case 't': case 'T': a --; b --; c --; break; case 'J': case 'j': a ++; c --; break;
case 27: exit ( 0 ); break; default: break; } glutPostRedisplay();}
void arrow_keys ( int a_keys, int x, int y ) // Funcion para manejo de teclas especiales (arrow keys){ switch ( a_keys ) { case GLUT_KEY_PAGE_UP: pos_camY -= 0.5f; break;
case GLUT_KEY_PAGE_DOWN: pos_camY += 0.5f; break;
case GLUT_KEY_UP: eye_camX = (eye_camX-15) % 360; break;
case GLUT_KEY_DOWN: eye_camX = (eye_camX+15) % 360; break;
case GLUT_KEY_LEFT: eye_camY = (eye_camY-15) % 360; break;
case GLUT_KEY_RIGHT: eye_camY = (eye_camY+15) % 360; break; default: break; } glutPostRedisplay();}
int main ( int argc, char** argv ) // Main Function{ glutInit (&argc, argv); // Inicializamos OpenGL glutInitDisplayMode (GLUT_RGB GLUT_DOUBLE GLUT_DEPTH); // Display Mode (Clores RGB y alpha Buffer Doble ) glutInitWindowSize (500, 500); // Tama� de la Ventana glutInitWindowPosition (0, 0); //Posicion de la Ventana glutCreateWindow ("Cubo"); // Nombre de la Ventana InitGL (); // Parametros iniciales de la aplicacion glutDisplayFunc ( display ); //Indicamos a Glut funci� de dibujo glutReshapeFunc ( reshape ); //Indicamos a Glut funci� en caso de cambio de tamano glutKeyboardFunc ( keyboard ); //Indicamos a Glut funci� de manejo de teclado glutSpecialFunc ( arrow_keys ); //Otras//glutIdleFunc ( animacion ); glutMainLoop ( ); //
return 0;}
