/*
* OpenGL (GLUT) calls this routine to display the scene
*/
void display()
{
const double len=1.5; // Length of axes
int i = 0;
// Erase the window and the depth buffer
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
// Enable Z-buffering in OpenGL
glEnable(GL_DEPTH_TEST);
// Undo previous transformations
glLoadIdentity();
if (view){
double Ex = -2*dim*Sin(th)*Cos(ph);
double Ey = +2*dim *Sin(ph);
double Ez = +2*dim*Cos(th)*Cos(ph);
gluLookAt(Ex, Ey, Ez, 0,0,0, 0,Cos(ph),0);
}
else {
// Set view angle
glRotatef(ph,1,0,0);
glRotatef(th,0,1,0);
}
// Decide what to draw
switch (mode)
{
// Draw cubes
case 2:
truck(0,0,0 , 0.2,0.2,0.2 , 0);
truck(1,0,2 , 0.1,0.1,0.1 , 30);
truck(0,1,0 , 0.4,0.3,0.2 , 90);
break;
// Draw spheres
case 1:
taxi(0,0,0 , 0.2,0.2,0.2 , 0);
taxi(0,0,0 , 0.2,0.2,0.2 , 0);
taxi(0,0,0 , 0.2,0.2,0.2 , 0);
//tree(0,0,0,1);
break;
case 0:
// printf("ph: %f\t th: %f\t zh:%f\n", ph, th, zh);
//road
glBegin(GL_QUADS);
glColor3f(0.3, 0.3, 0.3);
glVertex3f(-100, -.1,-1);
glVertex3f(100, -.1, -1);
glVertex3f(100, -.1, 3);
glVertex3f(-100, -.1, 3);
//stripes
glColor3f(1,1,0);
for(i=-10; i<100; i++){
glVertex3f(i, -.1+offset, 1);
glVertex3f(i+.7, -.1+offset, 1);
glVertex3f(i+.7, -.1+offset, 1.1);
glVertex3f(i, -.1+offset, 1.1);
}
glEnd();
truck((zh-120)*0.1,.1,1.5, .15,.15,.15, 180);
taxi(-(zh-120)*0.15,0,.5, .1,.1,.1, 0);
truck(2-(zh-120)*0.1,.1,.1, .1,.1,.1, 0);
taxi(-5+(zh-100)*0.07,.2,1.5, .1,.1,.1, 180);
sleep(10000);
truck(10-(zh-120)*0.15,.1,.5, .1,.1,.1, 0);
// taxi(-2-(zh-120)*0.05,0,1, .1,.1,.1, 0);
break;
case 3:
// Cube
truck(-1,0,0 , 0.2,0.2,0.2 , 3*zh);
// Ball
//vaxisphere2(0,0,0 , 0.3);
taxi(Cos(zh), Sin(zh), Cos(zh)*Sin(zh), .1,.1,.1,1 );
break;
}
// White
glColor3f(1,1,1);
// Draw axes
if (mode != 0)
if (axes)
{
glBegin(GL_LINES);
glVertex3d(0.0,0.0,0.0);
glVertex3d(len,0.0,0.0);
glVertex3d(0.0,0.0,0.0);
glVertex3d(0.0,len,0.0);
glVertex3d(0.0,0.0,0.0);
glVertex3d(0.0,0.0,len);
glEnd();
// Label axes
glRasterPos3d(len,0.0,0.0);
Print("X");
glRasterPos3d(0.0,len,0.0);
Print("Y");
glRasterPos3d(0.0,0.0,len);
Print("Z");
}
// Five pixels from the lower left corner of the window
glWindowPos2i(5,5);
// Print the text string
Print("Angle=%d,%d",th,ph);
// Render the scene
glFlush();
// Make the rendered scene visible
glutSwapBuffers();
}
int main(void) {
*b = 10;
return taxi(9);
}
