Unfamiliar errors - GameCreators Forum

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Nithead

15

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Joined: 9th Mar 2009

Location: Hampshire, England

Posted: 9th Mar 2009 21:39

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Hey guys this is my first post,

I have been writing a program which i want to simulate an eco-system. so far i have created an array for the spheres, but when i added the code to try and make them bounce it did some weird things:

First i came up with a box saying: Unhandled exception at 0x004c731e in Equilibrium.exe: 0xC0000005: Access violation reading location 0x00136b10.

It gave the options of 'Break' and 'Continue'

If i press Continue nothing happens, but if i press Break I noticed that the box with all the information about compiling said:

First-chance exception at 0x004c731e in Equilibrium.exe: 0xC0000005: Access violation reading location 0x00136b10.
Unhandled exception at 0x004c731e in Equilibrium.exe: 0xC0000005: Access violation reading location 0x00136b10.

A yellow arrow appears next to my code.

I have no idea why this would be happening as it hasnt done so before.

here is my code:

#include "DarkGDK.h"

void DarkGDK ( void )
{
	
	dbSyncOn   ( );
	dbSyncRate ( 60 );

int Sid = 1;
	int Sx [100];
	int Sz [100];
	int Sg [100];
	int SBo;
	int SRo;
	int Sm;
	int Sa [100];
	Sg[1] = 0;
	Sg[2] = 1;

int Setup = 1;
	
	dbSetAmbientLight ( 0 );

dbMakeObjectCube (201, 100);
	dbPositionObject (201, 0, 0, 0);
	dbScaleObject (201, 1000, 0.01, 1000);
	dbColorObject (201, dbRGB ( 0, 0, 0 ));

while ( LoopGDK ( ) ) {
		
		dbPositionCamera ( 0, 1000, 0 );
		dbPointCamera ( 0, 0, 0 );

// Make initial spheres
		if (Setup = 1) {
			if (Sid <= 2) {
				
				SBo = 0;
				SRo = 0;
				
				Sx[Sid] = dbRND ( 500 );
				Sz[Sid] = dbRND ( 500 );
				Sa[Sid] = dbRND ( 360 );
				
				dbMakeObjectSphere ( Sid, 50 );
				dbPositionObject ( Sid, Sx[Sid], 0, Sz[Sid] );
				dbYRotateObject ( Sid, Sa[Sid] );
				
				if (Sg[Sid] == 0){SRo = 1000;}
				if (Sg[Sid] == 1){SBo = 1000;}
				
				dbColorObject ( Sid, dbRGB ( SRo, 0, SBo ));
				
				Sid = Sid + 1;
				Sm = Sm + 1;

}}
		if (Sid > 2) {
			Setup = 0;
			Sid = 0;
		}
		
		// Make initial spheres

//////////////////////////////////////////////////////////////////////////////////////

// Run the spheres

if ( Setup == 0 ) {
			if (Sid <= Sm) {
				
				dbMoveObject ( Sid, 10 );
				
				if (Sx[Sid] <= -500) {
					Sa[Sid] = Sa[Sid] * 2;
					dbYRotateObject ( Sid, Sa[Sid] );
				}
				if (Sx[Sid] >= 500) {
					Sa[Sid] = Sa[Sid] * 2;
					dbYRotateObject ( Sid, Sa[Sid] );
				}	
				if (Sz[Sid] <= -500) {
					Sa[Sid] = Sa[Sid] * 2;
					dbYRotateObject ( Sid, Sa[Sid] );
				}
				if (Sx[Sid] >= 500) {
					Sa[Sid] = Sa[Sid] * 2;
					dbYRotateObject ( Sid, Sa[Sid] );
				}

Sid = Sid + 1;
			}}

if (Sid > Sm) {
			Sid = 1;
		}

dbSync();
	}

return;
}

+ Code Snippet

#include "DarkGDK.h"

void DarkGDK ( void )
{
	
	dbSyncOn   ( );
	dbSyncRate ( 60 );

	
	int Sid = 1;
	int Sx [100];
	int Sz [100];
	int Sg [100];
	int SBo;
	int SRo;
	int Sm;
	int Sa [100];
	Sg[1] = 0;
	Sg[2] = 1;

	int Setup = 1;
	
	dbSetAmbientLight ( 0 );

	dbMakeObjectCube (201, 100);
	dbPositionObject (201, 0, 0, 0);
	dbScaleObject (201, 1000, 0.01, 1000);
	dbColorObject (201, dbRGB ( 0, 0, 0 ));
	

	while ( LoopGDK ( ) ) {
		
		dbPositionCamera ( 0, 1000, 0 );
		dbPointCamera ( 0, 0, 0 );

		// Make initial spheres
		if (Setup = 1) {
			if (Sid <= 2) {
				
				SBo = 0;
				SRo = 0;
				
				Sx[Sid] = dbRND ( 500 );
				Sz[Sid] = dbRND ( 500 );
				Sa[Sid] = dbRND ( 360 );
				
				dbMakeObjectSphere ( Sid, 50 );
				dbPositionObject ( Sid, Sx[Sid], 0, Sz[Sid] );
				dbYRotateObject ( Sid, Sa[Sid] );
				
				if (Sg[Sid] == 0){SRo = 1000;}
				if (Sg[Sid] == 1){SBo = 1000;}
				
				dbColorObject ( Sid, dbRGB ( SRo, 0, SBo ));
				
				Sid = Sid + 1;
				Sm = Sm + 1;

		}}
		if (Sid > 2) {
			Setup = 0;
			Sid = 0;
		}
		
		// Make initial spheres

		//////////////////////////////////////////////////////////////////////////////////////

		// Run the spheres

		if ( Setup == 0 ) {
			if (Sid <= Sm) {
				
				dbMoveObject ( Sid, 10 );
				
				if (Sx[Sid] <= -500) {
					Sa[Sid] = Sa[Sid] * 2;
					dbYRotateObject ( Sid, Sa[Sid] );
				}
				if (Sx[Sid] >= 500) {
					Sa[Sid] = Sa[Sid] * 2;
					dbYRotateObject ( Sid, Sa[Sid] );
				}	
				if (Sz[Sid] <= -500) {
					Sa[Sid] = Sa[Sid] * 2;
					dbYRotateObject ( Sid, Sa[Sid] );
				}
				if (Sx[Sid] >= 500) {
					Sa[Sid] = Sa[Sid] * 2;
					dbYRotateObject ( Sid, Sa[Sid] );
				}

				Sid = Sid + 1;
			}}

		if (Sid > Sm) {
			Sid = 1;
		}

	
	dbSync();
	}

	return;
}

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Michael P

18

Years of Service

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Joined: 6th Mar 2006

Location: London (UK)

Posted: 10th Mar 2009 09:38 Edited at: 10th Mar 2009 21:52

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Sm is not initialized so you are trying to move an object that is not created and thus writing to unallocated memory and causing an access violation. I set Sm to = 0 at the start and the problem was solved.

[edit] Did not read code properly, Sm is not used with dbMoveObject so this is not the cause of the access violations.

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Nithead

15

Years of Service

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Joined: 9th Mar 2009

Location: Hampshire, England

Posted: 10th Mar 2009 18:28

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I have tried this but it still shows the same errors

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Nithead

15

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Joined: 9th Mar 2009

Location: Hampshire, England

Posted: 10th Mar 2009 21:14

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Please help i hate it when these things happen T.T

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Michael P

18

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Joined: 6th Mar 2006

Location: London (UK)

Posted: 10th Mar 2009 21:51 Edited at: 10th Mar 2009 21:55

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[edit]
Using the debugger I can see that with dbMoveObject, Sid is always 0; object IDs range from 1 upwards so you are trying to move an object that doesn't exist. The dbMoveObject I am referring to is after the "// Run the spheres" comment.

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Nithead

15

Years of Service

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Joined: 9th Mar 2009

Location: Hampshire, England

Posted: 10th Mar 2009 23:27

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I AM SUCH AN IDIOT

thank you its all so obvious what was wrong now!!!

the collision isnt working but ill work on that now

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Nithead

15

Years of Service

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Joined: 9th Mar 2009

Location: Hampshire, England

Posted: 11th Mar 2009 00:50

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i've gotten another problem. The collision and bouncing off of the spheres on the blockers on the left and right (obj numbers 203 and 202) works perfectly, but nothing i can do will make the other two work.

please help

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Nithead

15

Years of Service

User Offline

Joined: 9th Mar 2009

Location: Hampshire, England

Posted: 11th Mar 2009 00:52

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here is the code:

#include "DarkGDK.h"

void DarkGDK ( void )
{
	
	dbSyncOn   ( );
	dbSyncRate ( 60 );

int Sid = 1;
	int Sx [100];
	int Sz [100];
	int Sg [100];
	int SBo;
	int SRo;
	int Sm;
	Sm = 2;
	int Sa [100];
	Sg[1] = 0;
	Sg[2] = 1;
	int Setup = 1;
	
	dbSetAmbientLight ( 0 );

dbRandomize ( 9 );

dbMakeObjectCube (201, 100);
	dbPositionObject (201, 0, 0, 0);
	dbScaleObject (201, 1000, 0.5, 1000);
	dbColorObject (201, dbRGB ( 0, 0, 0 ));
	
	dbMakeObjectCube (202, 100);
	dbPositionObject (202, 500, 0, 0);
	dbScaleObject (202, 40, 50, 1000);

dbMakeObjectCube (203, 100);
	dbPositionObject (203, -500, 0, 0);
	dbScaleObject (203, 40, 50, 1000);

dbMakeObjectCube (204, 100);
	dbPositionObject (204, 0, 0, 500 );
	dbScaleObject (204, 1040, 50, 40);

dbMakeObjectCube (205, 100);
	dbPositionObject (205, 0, 0, -500 );
	dbScaleObject (205, 1040, 50, 40);

while ( LoopGDK ( ) ) {
		
		dbPositionCamera ( 0, 1000, 0 );
		dbPointCamera ( 0, 0, 0 );

// Make initial spheres
		if (Setup == 1) {
			if (Sid <= 2) {
				
				SBo = 0;
				SRo = 0;
				
				Sx[Sid] = dbRND ( 500 );
				Sz[Sid] = dbRND ( 500 );
				Sa[Sid] = dbRND ( 360 );

dbMakeObjectSphere ( Sid, 50 );
				dbPositionObject ( Sid, Sx[Sid], 0, Sz[Sid] );
				dbYRotateObject ( Sid, Sa[Sid] );
				
				if (Sg[Sid] == 0){SRo = 1000;}
				if (Sg[Sid] == 1){SBo = 1000;}
				
				dbColorObject ( Sid, dbRGB ( SRo, 0, SBo ));
				
				Sid = Sid + 1;
				Sm = Sm + 1;

}}
		if (Sid > 2) {
			Setup = 0;
			Sm = 2;
			Sid = 1;
		}
		
		// Make initial spheres

//////////////////////////////////////////////////////////////////////////////////////

// Run the spheres

if ( Setup == 0 ) {
			if (Sid <= Sm) {

dbMoveObject ( Sid, 20 );
				
				if (dbObjectCollision ( Sid, 202 )) {
					Sa [Sid] = Sa [Sid] - (Sa [Sid] * 2);
					dbYRotateObject ( Sid, Sa[Sid] );
					dbMoveObject ( Sid, 10 );
				}
				if (dbObjectCollision ( Sid, 203 )) {
					Sa [Sid] = Sa [Sid] - (Sa [Sid] * 2);
					dbYRotateObject ( Sid, Sa[Sid] );
					dbMoveObject ( Sid, 10 );
				}	
				if (dbObjectCollision ( Sid, 204 )) {
					Sa [Sid] = Sa [Sid] + (Sa [Sid] * 2) + 90;
					dbYRotateObject ( Sid, Sa[Sid] );
					dbMoveObject ( Sid, 10 );
				}
				if (dbObjectCollision ( Sid, 205 )) {
					Sa [Sid] = Sa [Sid] + (Sa [Sid] * 2) + 90;
					dbYRotateObject ( Sid, Sa[Sid] );
					dbMoveObject ( Sid, 10 );
				}

Sid = Sid + 1;
			}}

if (Sid > Sm) {
			Sid = 1;
		}

dbSync();
	}

return;
}

+ Code Snippet

#include "DarkGDK.h"

void DarkGDK ( void )
{
	
	dbSyncOn   ( );
	dbSyncRate ( 60 );

	
	int Sid = 1;
	int Sx [100];
	int Sz [100];
	int Sg [100];
	int SBo;
	int SRo;
	int Sm;
	Sm = 2;
	int Sa [100];
	Sg[1] = 0;
	Sg[2] = 1;
	int Setup = 1;
	
	dbSetAmbientLight ( 0 );

	dbRandomize ( 9 );


	dbMakeObjectCube (201, 100);
	dbPositionObject (201, 0, 0, 0);
	dbScaleObject (201, 1000, 0.5, 1000);
	dbColorObject (201, dbRGB ( 0, 0, 0 ));
	
	dbMakeObjectCube (202, 100);
	dbPositionObject (202, 500, 0, 0);
	dbScaleObject (202, 40, 50, 1000);

	dbMakeObjectCube (203, 100);
	dbPositionObject (203, -500, 0, 0);
	dbScaleObject (203, 40, 50, 1000);

	dbMakeObjectCube (204, 100);
	dbPositionObject (204, 0, 0, 500 );
	dbScaleObject (204, 1040, 50, 40);

	dbMakeObjectCube (205, 100);
	dbPositionObject (205, 0, 0, -500 );
	dbScaleObject (205, 1040, 50, 40);


	while ( LoopGDK ( ) ) {
		
		dbPositionCamera ( 0, 1000, 0 );
		dbPointCamera ( 0, 0, 0 );

		// Make initial spheres
		if (Setup == 1) {
			if (Sid <= 2) {
				
				SBo = 0;
				SRo = 0;
				
				Sx[Sid] = dbRND ( 500 );
				Sz[Sid] = dbRND ( 500 );
				Sa[Sid] = dbRND ( 360 );

				dbMakeObjectSphere ( Sid, 50 );
				dbPositionObject ( Sid, Sx[Sid], 0, Sz[Sid] );
				dbYRotateObject ( Sid, Sa[Sid] );
				
				if (Sg[Sid] == 0){SRo = 1000;}
				if (Sg[Sid] == 1){SBo = 1000;}
				
				dbColorObject ( Sid, dbRGB ( SRo, 0, SBo ));
				
				Sid = Sid + 1;
				Sm = Sm + 1;

		}}
		if (Sid > 2) {
			Setup = 0;
			Sm = 2;
			Sid = 1;
		}
		
		// Make initial spheres

		//////////////////////////////////////////////////////////////////////////////////////

		// Run the spheres

		if ( Setup == 0 ) {
			if (Sid <= Sm) {


				dbMoveObject ( Sid, 20 );
				
				if (dbObjectCollision ( Sid, 202 )) {
					Sa [Sid] = Sa [Sid] - (Sa [Sid] * 2);
					dbYRotateObject ( Sid, Sa[Sid] );
					dbMoveObject ( Sid, 10 );
				}
				if (dbObjectCollision ( Sid, 203 )) {
					Sa [Sid] = Sa [Sid] - (Sa [Sid] * 2);
					dbYRotateObject ( Sid, Sa[Sid] );
					dbMoveObject ( Sid, 10 );
				}	
				if (dbObjectCollision ( Sid, 204 )) {
					Sa [Sid] = Sa [Sid] + (Sa [Sid] * 2) + 90;
					dbYRotateObject ( Sid, Sa[Sid] );
					dbMoveObject ( Sid, 10 );
				}
				if (dbObjectCollision ( Sid, 205 )) {
					Sa [Sid] = Sa [Sid] + (Sa [Sid] * 2) + 90;
					dbYRotateObject ( Sid, Sa[Sid] );
					dbMoveObject ( Sid, 10 );
				}

				Sid = Sid + 1;
			}}

		if (Sid > Sm) {
			Sid = 1;
		}

	
	dbSync();
	}

	return;
}

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