Thread: having an error with my partice engine

heres the code:

Code:

#include <windows.h>		// Header File For Windows
#include <gl\gl.h>			// Header File For The OpenGL32 Library
#include <gl\glu.h>			// Header File For The GLu32 Library
#include <gl\glaux.h>		// Header File For The Glaux Library
#define MAX_PARTICLES 1000
HDC			hDC=NULL;		// Private GDI Device Context
HGLRC		hRC=NULL;		// Permanent Rendering Context
HWND		hWnd=NULL;		// Holds Our Window Handle
HINSTANCE	hInstance;		// Holds The Instance Of The Application
float slowdown = 2.0f;
bool	keys[256];			// Array Used For The Keyboard Routine
bool	active=TRUE;		// Window Active Flag Set To TRUE By Default
bool	fullscreen=TRUE;	// Fullscreen Flag Set To Fullscreen Mode By Default

struct PARTICLE
{

	bool active; // is particle alive?
	float life;  // how much life does particle have
	float fade;  // how fast does it die out
	float x;     // its x pos
	float y;     // its y pos
 	float z;     // its z pos
	float xvec;  // its x vector
	float yvec;  // its y vector
	float zvec;  // its z vector
	float xgrav; // its gravity on x plane
	float ygrav; // its gravity on y plane
	float zgrav; // its gravity on z plane
	float r;     // its red color
	float g;     // its green color
	float b;     // its blue color
};

PARTICLE particle[MAX_PARTICLES];


LRESULT	CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);	// Declaration For WndProc

GLvoid ReSizeGLScene(GLsizei width, GLsizei height)		// Resize And Initialize The GL Window
{
	if (height==0)										// Prevent A Divide By Zero By
	{
		height=1;										// Making Height Equal One
	}

	glViewport(0,0,width,height);						// Reset The Current Viewport

	glMatrixMode(GL_PROJECTION);						// Select The Projection Matrix
	glLoadIdentity();									// Reset The Projection Matrix

	// Calculate The Aspect Ratio Of The Window
	gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);

	glMatrixMode(GL_MODELVIEW);							// Select The Modelview Matrix
	glLoadIdentity();									// Reset The Modelview Matrix
}

int InitGL(GLvoid)										// All Setup For OpenGL Goes Here
{
	glShadeModel(GL_SMOOTH);							// Enable Smooth Shading
	glClearColor(0.0f, 0.0f, 0.0f, 0.5f);				// Black Background
	glClearDepth(1.0f);									// Depth Buffer Setup
		glEnable(GL_BLEND);									// Enable Blending
	glBlendFunc(GL_SRC_ALPHA,GL_ONE);					// Type Of Blending To Perform
	glDisable(GL_DEPTH_TEST);							// Disables Depth Testing
	glDepthFunc(GL_LEQUAL);								// The Type Of Depth Testing To Do
	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);	// Really Nice Perspective Calculations
	
	
	for (int loop = 0; loop < MAX_PARTICLES;loop++)
	{

		particle[loop].active = TRUE; // initiating particles life;
		particle[loop].life   = 1.0f; // initiating particle's life time
		particle[loop].fade   = float(((rand() % loop)/1000) + .003f); // set a random fading time
        particle[loop].xvec      = float((rand() % 100) - 50.0f) * 10.0f; // randome velocity on x vector
		particle[loop].yvec      = float((rand() % 100) - 50.0f) * 10.0f; // randome velocity on y vector
		particle[loop].zvec      = float((rand() % 100) - 50.0f) * 10.0f; // randome velocity on z vector
		particle[loop].xgrav     = 0.0f;
		particle[loop].ygrav     = -0.8f;
		particle[loop].zgrav     = 0.0f;
		particle[loop].r    = float(((rand() % 100)/1000) * slowdown);
		particle[loop].g    = float(((rand() % 100)/1000) * slowdown);
		particle[loop].b    = float(((rand() % 100)/1000) * slowdown);
	}

	return TRUE;										// Initialization Went OK
}

int DrawGLScene(GLvoid)									// Here's Where We Do All The Drawing
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);	// Clear Screen And Depth Buffer
	glLoadIdentity(); // Reset The Current Modelview Matrix
	

	for (int loop = 0; loop<MAX_PARTICLES;loop++)
	{

		if (particle[loop].active)
		{

			float x = particle[loop].x;
			float y = particle[loop].y;
			float z = particle[loop].z;

			glColor4f(particle[loop].r,particle[loop].g,particle[loop].b,particle[loop].life);
			glBegin(GL_TRIANGLES);
			
			glVertex3f(x+0.5f,y+0.5f,z);
			glVertex3f(x-0.5f,y+0.5f,z);
			glVertex3f(x+0.5f,y-0.5f,z);
			glEnd();

			particle[loop].x += particle[loop].xvec/(slowdown*1000);
			particle[loop].y += particle[loop].yvec/(slowdown*1000);
			particle[loop].z += particle[loop].zvec/(slowdown*1000);

			particle[loop].xvec += particle[loop].xgrav;
			particle[loop].yvec += particle[loop].ygrav;
			particle[loop].xvec += particle[loop].zgrav;

			particle[loop].life -= particle[loop].fade;

			if (particle[loop].life < 0.0f)
			{
				particle[loop].life = 1.0f;
				particle[loop].fade = float(rand()%100)/1000.0f+0.003f;
				particle[loop].x    = 0.0f;
				particle[loop].y    = 0.0f;
				particle[loop].z    = 0.0f;
				particle[loop].xvec = float(((rand() % 100)/100) + .05f);
				particle[loop].yvec = float(((rand() % 100)/100) + .05f);
				particle[loop].zvec = float(((rand() % 100)/100) + .05f);
				particle[loop].r    = float(((rand() % 100)/1000) * slowdown);
				particle[loop].g    = float(((rand() % 100)/1000) * slowdown);
				particle[loop].b    = float(((rand() % 100)/1000) * slowdown);
			}
		}
	}

	
	return TRUE;
}

................everything the same as NeHe's base code

my problem is, it compiles just fine, but when I run it, it says that it has commited an error, and I dont know what it is.

Nevermind, I fixed it, i acidentally put too many parenthesis in the "fade" definitions.