Quote:Original post by bronxbomber92
Hello, I have been reading the the red book, and I would like to use OpenGL on my mac. But I don't want to use objective-c with cocoa. I would like to use c/c++... I've tried using GLUT then using nehe's tutorials, but it just gives me a black screen. Can anyone help me?

Quote:Have you tried downloading and using the project files for the os x initialization tutorial?

Quote:main.c:71: error: nested functions are disabled, use -fnested-functions to re-enable
main.c:127: error: nested functions are disabled, use -fnested-functions to re-enable
main.c:151: error: parse error at end of input

#include "SDL.h"#include <OpenGL/gl.h>#include <math.h>#include <stdio.h>	#include <stdlib.h>#define MAX_PARTICLES 100typedef struct PARTICLES_ {	float life;	float fade;	float x;	float y;	float z;	float xi;	float yi;	float zi;} PARTICLES;PARTICLES particle[MAX_PARTICLES];int loop;float V;float Angle;float red = 0;float green = 0;float blue = 0;void InitGL();void Display();void InitGL() {		glClearColor( 0, 0, 0, 0 );		glLoadIdentity();									// Reset The Projection Matrix    glEnable(GL_TEXTURE_2D);    glEnable(GL_BLEND);    glShadeModel(GL_SMOOTH);    glBlendFunc(GL_SRC_ALPHA, GL_ONE);		for( loop = 0; loop < MAX_PARTICLES; loop++) {		particle[loop].life = 1.0;		particle[loop].fade = (rand()%100)/1000.0 + 0.05;		V = rand()%25;		Angle = rand()%360;				particle[loop].x = 0;		particle[loop].y = 0;		particle[loop].z = 0;				particle[loop].xi = sin(Angle)*V;		particle[loop].yi = cos(Angle)*V;		particle[loop].zi = (((rand()%10)-5)/10)*V;	    glViewport( 0, 0, 640, 480 );	    glOrtho( 0, 640, 480, 0, -1, 1 );    }void Display() { //LINE 71	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);		// Clear The Screen And The Depth Buffer	glLoadIdentity();				// Reset The View		glTranslatef(0,0,1);			for(loop = 0; loop < MAX_PARTICLES; loop++) {				float x;		float y;		float z;				x = particle[loop].x;		y = particle[loop].y;		z = particle[loop].z;				glColor4f(.5f,.5f,1.f,particle[loop].life);				glBegin(GL_TRIANGLE_STRIP);		glTexCoord2f(1,1); glVertex3f( x + 0.2f, y + 0.2f, z );		glTexCoord2f(0,1); glVertex3f( x - 0.2f, y + 0.2f, z );		glTexCoord2f(1,0); glVertex3f( x - 0.2f, y - 0.2f, z );		glTexCoord2f(0,0); glVertex3f(x-0.2f,y-0.2f,z);		glEnd();				particle[loop].x += (particle[loop].xi/250);		particle[loop].y += (particle[loop].yi/250);		particle[loop].z += (particle[loop].zi/250);				// Slow down the particles		particle[loop].xi*=.975;  		particle[loop].yi*=.975;		particle[loop].zi*=.975;				particle[loop].life-=particle[loop].fade;	 // Reduce Particles Life By 'Fade'				if (particle[loop].life<0.05f)	 // If Particle Is Burned Out		{			particle[loop].life=1.0f;	 // Give It New Life			particle[loop].fade= (float)(rand()%100)/7500 + 0.0075f;	// Random Fade Value			particle[loop].x= 0;	 // Center On X Axis			particle[loop].y= 0;	 // Center On Y Axis			particle[loop].z= 0;	 // Center On Z Axis			V = ((float)((rand()%9))+1);			Angle = (float)(rand()%360);						particle[loop].xi = sin(Angle) * V;			particle[loop].yi = cos(Angle) * V;			particle[loop].zi = ((rand()%10)-5)/5;		} 	}    SDL_GL_SwapBuffers();}	   int main(int argc, char *argv[]){ //LINE 127    SDL_Surface *screen;	    // Slightly different SDL initialization    if ( SDL_Init(SDL_INIT_VIDEO) != 0 ) {        printf("Unable to initialize SDL: %s\n", SDL_GetError());        return 1;    }	    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 ); // *new*	    screen = SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL ); // *changed*    if ( !screen ) {		printf("Unable to set video mode: %s\n", SDL_GetError());		return 1;	}		while(1) {				InitGL();		Display();	}    	return 0;} //LINE 151