cubes not same size and text not showing :(

[chuck norrrissss]

hello,
i'm new to using openGL and GLUT so please be gentle
i'm trying to make 3 wirecubes (all the same size) and place them at different places on the screen.

i can get the cubes up but they are all different sizes which is weird AND if i click on the window, all cubes get smaller and smaller with each click and i did not code that.

my other issue is that the text i'm trying to put on the screen (2D text) is not at all showing up.

i'm using vs2005.
here is my code, any ideas???

// ***************************************************
// ** Creates 3 Boxes                               **
// ***************************************************
 
// used later when the FALCON is connected
//#include <windows.h>
//#include "glut.h"
//#include <math.h>
//#include "haptics.h"
 
#include <stdlib.h>
#include <GL/openglut.h>
//#include <GL/glut.h> 
#include <stdio.h>
#include <iostream>
 
using namespace std;
int w, h;
 
// if the window size is changed, the objects inside will be resized as well
void changeSize(int w, int h) {
 
    // Prevent a divide by zero, when window is too short
	// (you cant make a window of zero width).
	if (h == 0)
		h = 1;
	double ratio =  w * 1.0 / h;    // changed 'float' to 'double' due to warning
 
	// Use the Projection Matrix
	glMatrixMode(GL_PROJECTION);
 
    // Reset Matrix
	glLoadIdentity();
 
	// Set the viewport to be the entire window
	glViewport(0, 0, w, h);
 
	// Set the correct perspective.
	gluPerspective(45, ratio, 0.1, 100);
 
	// Get Back to the Modelview
	glMatrixMode(GL_MODELVIEW);
}
 
 
// exit out by pressing 'ESC' key
void glutKeyboard(unsigned char key, int x, int y) {
 
    static bool inited = true;
    if (key == 27) // esc key
    {
        exit(0);
    }
}
 
 
void renderBitmapString (float x, float y, float z, void *font, char *string) {
 
    char *c;
    glRasterPos3f(x, y, z);
    for (c = string; *c != '\0'; c++) {
        glutBitmapCharacter(font, *c);
    }
}
 
 
void restorePerspectiveProjection() {
 
	glMatrixMode(GL_PROJECTION);
	// restore previous projection matrix
	glPopMatrix();
 
	// get back to modelview mode
	glMatrixMode(GL_MODELVIEW);
}
 
 
void setOrthographicProjection() {
 
	// switch to projection mode
	glMatrixMode(GL_PROJECTION);
 
	// save previous matrix which contains the
	// settings for the perspective projection
	glPushMatrix();
 
	// reset matrix
	glLoadIdentity();
 
	// set a 2D orthographic projection
	gluOrtho2D(0, w, h, 0);
 
	// switch back to modelview mode
	glMatrixMode(GL_MODELVIEW);
}
 
 
// creates three boxes and text
void renderScene(void) {
 
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
    // draw three boxes
    glTranslated(2, 0, -5);
    glutWireCube(0.5);
 
    glTranslated(-2, 0, -5);
    glutWireCube(0.5);
 
    glTranslated(1, 2, -5);
    glutWireCube(0.5);
 
    // Code to display a string (fps) with bitmap fonts
	setOrthographicProjection();
	glPushMatrix();
	glLoadIdentity();
	renderBitmapString(1.0f, 2.0f , -5.0f, GLUT_BITMAP_HELVETICA_18, "HELLO");
	glPopMatrix();
	restorePerspectiveProjection();
 
    glutSwapBuffers();
}
 
 
int main(int argc, char **argv) {
 
	// init GLUT, create Window and init Keyboard
	glutInit(&amp;argc, argv);
	glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);
	glutInitWindowPosition(100,100);
	glutInitWindowSize(900, 400);
	glutCreateWindow("THREE BOXES DEMO");
    glutKeyboardFunc(glutKeyboard);
 
    // register callbacks
	glutDisplayFunc(renderScene);
    renderBitmapString(0.1f, 0.1f, 0.1f, GLUT_BITMAP_TIMES_ROMAN_10, "hello");
	glutReshapeFunc(changeSize);
 
	// enter GLUT event processing cycle
	glutMainLoop();
 
}

[robmx]

I guess the change of size is because the transformations in renderScene() are being build up in each frame with the transformation done in the previous one. So try resetting the transformation at every frame

void renderScene() {
  ...
  ...
  glLoadIndentity(); // Reset transformation matrix
  glTranslate(...);  // apply transformation
  glutWireCube(...); // draw object
 
  glLoadIndentity(); // Reset transformation matrix
  glTranslate(...);  // apply new transformation
  glutWireCube(...); // draw new object
  ...
  ...
}

[chuck norrrissss]

thanks!!
not to be an a$$ or anything but its Identity, not Indentity just in case someone else looks. took me 10 minutes to see that error


and any ideas why my text is not showing up?

[chuck norrrissss]

nevermind, was calling the text in the wrong spot.
all is fixed and working as should, thanks for reading this