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help w/ crash since glut 3.7


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#1 taxman   Members   -  Reputation: 122

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Posted 18 November 2001 - 07:42 PM

I made the jump to glut 3.7 so I could try out their new fullscreen easy switching. Problem is that now I get a crash after everytime it executes, and after that crash I have to reboot before I can try again. This is my frist day trying opengl (yes I''ve been up for a lot of hours) Any general advice and extra help would be greatly appreciated as well.
  
#include <GL/glut.h>
#include <GL/gl.h>
#include <stdlib.h>
#include <math.h>
#include <iostream.h>
#include "image.h"


int width=500;
int height=500;

GLfloat spin = 0.0;
int prevmx = 0;
int prevmy = 0;
GLfloat increment = 0.05f;

const float piover180 = 0.0174532925f;
float heading;
float xpos;
float zpos;
int cheat=0;

GLfloat	yrot;				// Y Rotation

GLfloat walkbounce = 0;
GLfloat walkbounceangle = 0;
GLfloat lookupdown = 180.0f;

int minvert = -1;	//mouse inverts if you hit I

int freemouse=0;

GLuint texture[1];

#define MAZE_HEIGHT (16)
#define MAZE_WIDTH  (16)
char *mazedata[MAZE_HEIGHT] = {
		"****************",
        "*X      *      *",
        "* * *** * *    *",
        "* **  * ** * * *",
        "*     *      * *",
        "********** *** *",
        "*           *  *",
        "* ***** *** ****",
        "* *   *   *    *",
        "*   *******    *",
        "* *   *   *  * *",
        "* ***** **** * *",
        "*     *      * *",
        "** ** **** *** *",
        "*   * *    *   *",
        "************* **",
};

void LoadGLTextures();



//strings in 3d position

void draw_string_bitmap(void *font, const char* string, int x, int y) 
{
	glRasterPos3f(x+0.3, 0.4f, y+0.5);
	while (*string)
		glutBitmapCharacter(font, *string++);
}

void buildLists(){
//stored list of things to always be drawn that never change

#define MAZE_LIST 1
	glNewList(MAZE_LIST, GL_COMPILE);
	glPushAttrib(GL_CURRENT_BIT | GL_DEPTH_BUFFER_BIT);
	glLineWidth(2.0);

	for(int y=0;y<MAZE_HEIGHT;y++) {
		for(int x=0;x<MAZE_WIDTH;x++) {
			if(mazedata[x][y]==''*'') {
				glColor3f(0.5,0.5,0.5);
				glBegin(GL_QUAD_STRIP);
					glVertex3f( x  ,   0, y);
					glVertex3f( x  ,   1, y);
					glVertex3f( x+1,   0, y);
					glVertex3f( x+1,   1, y);
					glVertex3f( x+1,   0, y+1);
					glVertex3f( x+1,   1, y+1);
					glVertex3f( x  ,   0, y+1);
					glVertex3f( x  ,   1, y+1);
					glVertex3f( x  ,   0, y);
					glVertex3f( x  ,   1, y);
				glEnd();
			}
			else if(mazedata[x][y]==''X''){
				//cout << x << " " << y << endl;

				xpos=-x-0.5;
				zpos=-y-0.5;
				//cout << xpos << " " << zpos << endl;

				glColor3f(0.75,0.5,0.5);
				glBegin(GL_QUADS);
				//	glTexCoord2f(0.0 , 0.0);

					glVertex3f( x  ,   1, y);
				//	glTexCoord2f(0.0 , 1.0);

					glVertex3f( x+1,   1, y);
				//	glTexCoord2f(1.0 , 1.0);

					glVertex3f( x+1,   1, y+1);
				//	glTexCoord2f(1.0 , 0.0);

					glVertex3f( x,     1, y+1);
				glEnd();
			}
			else if(mazedata[x][y]=='' ''){
				glColor3f(0.5,0.5,0.75);
			//	glEnable(GL_TEXTURE_2D);

				glBindTexture(GL_TEXTURE_2D, texture[0]); 
				glBegin(GL_QUADS);
					glTexCoord2f(0.0 , 0.0);
					glVertex3f( x  ,   1, y);
					glTexCoord2f(0.0 , 1.0);
					glVertex3f( x+1,   1, y);
					glTexCoord2f(1.0 , 1.0);
					glVertex3f( x+1,   1, y+1);
					glTexCoord2f(1.0 , 0.0);
					glVertex3f( x,     1, y+1);
				glEnd();
			//	glDisable(GL_TEXTURE_2D);

			}
			else if(mazedata[x][y]==''1''){
				glColor3f(1.0 , 0.0 , 0.0);
				draw_string_bitmap("fixed", "Lost?", x,y);
			}
		}
	}

	glPopAttrib();
	glEndList();
}




void display()
{

	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);	// Clear The Screen And The Depth Buffer

	glLoadIdentity();									// Reset The View


	GLfloat ypos = -0.65-walkbounce;
	GLfloat sceneroty = 360.0f - yrot;

	glRotatef(lookupdown,1.0f,0,0);
	glRotatef(sceneroty,0,1.0f,0);
	
	glTranslatef(xpos, ypos+cheat, zpos);

	glCallList(MAZE_LIST);
	glEnable(GL_TEXTURE_2D);
	glutSwapBuffers();

}


void click_mouse(int button, int state, int x, int y)
{
//mouse buttons if state==GLUT_DOWN && button== GLUT_RIGHT_BUTTON...

}

void move_mouse(int x, int y)
{
/*annoying, but works
if(x>width-25 || x<25 || y<25 || y>height-25) 
	if(!freemouse)
		glutWarpPointer(width/2,height/2);

	if(y<prevmy){
		lookupdown += 1.0f * minvert;	
	}
	else if(y>prevmy){
		lookupdown -= 1.0f * minvert;
	}

	if(x<prevmx){
		heading -= 2.0f;
		yrot = heading;	
	}
	else if(x>prevmx){
		heading += 2.0f;
		yrot = heading;	
	}

	prevmy=y;
	prevmx=x;

	display(); //force redraw
*/
}

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

	if(key == ''w'')
	{
			xpos -= sin(heading*piover180)*0.1;
			zpos -= cos(heading*piover180)*0.1;
			if (walkbounceangle >= 359.0f) 
				walkbounceangle = 0.0f;
			else 
				walkbounceangle += 10;
			walkbounce = sin(walkbounceangle*piover180)/7.5;		
	}
	if(key == ''s'')
	{
			xpos += sin(heading*piover180)*0.1f;
			zpos += cos(heading*piover180)*0.1f;
			if (walkbounceangle <= 1.0f) 
				walkbounceangle = 359.0f;
			else 
				walkbounceangle-= 10;
			walkbounce = sin(walkbounceangle*piover180)/7.5;		
	}
	if(key == ''a'')
	{
			heading -= 2.5f;	
			yrot = heading;
	}
	if(key == ''d'')
	{
			heading += 2.5f;
			yrot = heading;			
	}

	if(key == ''i'')
	{
			minvert*=-1;			
	}
	if(key == ''t'')
	{
		exit(0);	
	}
	if(key == ''c'')
	{
		++cheat;			
	}
	if(key == ''v'')
	{
		--cheat;			
	}

	glutPostRedisplay();
}

void idle(){
	glutPostRedisplay() ;
}

void reshape(int w, int h){
	
	glViewport(0,0,(GLsizei)w,(GLsizei)h) ;
	glMatrixMode(GL_PROJECTION) ;
	glLoadIdentity() ;
	gluPerspective(60.0,(GLfloat)w/(GLfloat)h,0.1,10.0) ;
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	glEnable(GL_DEPTH_TEST);
	LoadGLTextures();
	buildLists();
	glutPostRedisplay();

}

void LoadGLTextures() {	
    Image *image1;
    
    image1 = (Image *) malloc(sizeof(Image));
    if (image1 == NULL) {
	cout << "Error allocating space for image";
	exit(0);
    }

    if (!ImageLoad("stone.bmp", image1)) {
	exit(1);
    } 

    /* Create Texture	*****************************************/
    glGenTextures(2, &texture[0]);
    glBindTexture(GL_TEXTURE_2D, texture[0]);   /* 2d texture (x and y size)*/

    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); /* scale linearly when image bigger than texture*/
    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); /* scale linearly when image smalled than texture*/
	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S, GL_REPEAT);
	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T, GL_REPEAT);

    glTexImage2D(GL_TEXTURE_2D, 0, 3, image1->sizeX, image1->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, image1->data);

	free(image1->data);
	free(image1);

};

void myinit()
{
	//glShadeModel(GL_SMOOTH);

	//glEnable(GL_CULL_FACE);

	glClearColor(0.0, 0.0, 0.0, 0.0);
	glColor3f(1.0, 1.0, 1.0);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();			
	glMatrixMode(GL_MODELVIEW);	
	glLoadIdentity();
	glEnable(GL_DEPTH_TEST);
	LoadGLTextures();
	buildLists();

}

void main(int argc, char **argv)
{

	glutInit(&argc, argv) ;
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH) ; 

	glutGameModeString("800x600:16@60") ;
	if (glutGameModeGet(GLUT_GAME_MODE_WIDTH) != -1)  // if the width is different to -1

	{
		myinit();
		glutEnterGameMode();		// enter full screen mode

		glutDisplayFunc(display) ;
		glutReshapeFunc(reshape) ;
		glutIdleFunc(idle) ;
		glutKeyboardFunc(nav_kbd) ;
	}
	else							// print out that this mode is not available

		cout << "Chances are you don''t have glut 3.7 from xmission.com/~nate/glut.html \n";

	glutMainLoop() ;

}


  


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#2 Fruny   Moderators   -  Reputation: 1653

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Posted 18 November 2001 - 08:24 PM

You should create a window with glutCreateWindow() before trying to register callbacks. That''s because callbacks are registered for a specific window (the last created or the one you last glutSetWindow()''ed ). Since you have no window yet...




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