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View Full Version : Viewport and other help needed please



Owngina
02-02-2009, 10:48 AM
I'm going to post my code but I will explain what I need help with first.

I'm currently trying to setup my project and have two wireframe teapots appear on the screen, one in orthographic view and one in perspective view.

I have drawn two windows and I think the code is right for the different type of viewports (ortho and perspective) but it is what I want to do after this that is stalling me.

In the orthographic view I want to be able to view the x,y,z axis by pressing their keys respectively without the teapot in the perspective window moving also, and in perspective view I want to be able to use the arrow keys to rotate around the teapot without the ortho teapot moving.

My main problem is that I dont know how to separate the teapots so I can do this, I think my windows are setup correctly but I'm just having a tonne of trouble. Code is posted below




#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <GL/glut.h>

static int WIN_H = 800; /* window height */
static int WIN_W = 800; /* window width */
static int WIN_POS_X = 200; /* window's x position */
static int WIN_POS_Y = 0; /* window's y position */

float xAngle;
float yAngle;
float zAngle;

void drawTeapot()
{
glRotatef(xAngle,1.0,0.0,0.0);
glRotatef(yAngle,0.0,1.0,0.0);
glColor3f(150.0,200.0,100.0);
glutWireTeapot(0.5);
glFlush ();
}

void display()
{
glClearColor(0.0,1.0,0.0,1.0);
glClear (GL_COLOR_BUFFER_BIT| GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();

glViewport(0,0,WIN_W/2,WIN_H);
gluPerspective(45.0,1.0* WIN_W/WIN_H,1.0,100.0);
glTranslatef(0.0,0.0,-10.0);
drawTeapot();


glLoadIdentity();
glOrtho(0.0,WIN_W,0.0,WIN_H,0.0,0.0);
glMatrixMode(GL_MODELVIEW);
glViewport(WIN_W/2,0,WIN_W/2,WIN_H);
drawTeapot();
glFlush();
}

void keyboard (unsigned char key, int x, int y) {

if (key=='q')
{
exit(1);
}

if(key == 'x')
{
xAngle = 0.0;
yAngle = 0.0;

glutPostRedisplay();
}

if(key == 'y')
{

xAngle = 90.0;
yAngle = 0.0;

glutPostRedisplay();
}
if(key == 'z')
{
xAngle = 0.0;
yAngle = 120.0;

glutPostRedisplay();

}

}

int main(int argc, char* argv[])
{

glutInit(&amp;argc,argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(WIN_W,WIN_H);
glutInitWindowPosition(WIN_POS_X, WIN_POS_Y);
glutCreateWindow("OPENGL PROGRAM");


glutDisplayFunc(display);
glutKeyboardFunc(keyboard);
glutMainLoop();
return 0;
}




help plz

Owngina
02-03-2009, 12:45 PM
nevermind, fixed it myslef lol