Problem with a header file - GameCreators Forum

Author

Message

programing maniac

16

Years of Service

User Offline

Joined: 19th Apr 2008

Location: Bawk, Bawkity

Posted: 14th Jun 2008 03:09

Link

I am trying to create a header file that makes it so you can use gravity much easier. I have this so far-

+ Code Snippet

#pragma once
#include "SC_Collision.h"

//Gravity
int IDObject;
int IDGround;

SC_SetupObject ( IDObject, 2, 0 );
SC_SetupObject ( IDGround, 1, 0 );

int IGravity=1;
int IUpForce=1;

bool BGravity;
bool BGround;

void WhileLoops();
void Collision();

void Collision()
{
	if ( SC_GroupCollision ( IDObject, 1 ))
	{
		BGravity = false;
		BGround = true;
	}
	if ( SC_GoupCollision ( IDObject, 1 )== 0 )
	{
		BGravity = true;
		BGround = false;
	}
}
void WhileLoops()
{
	while ( BGravity == true )
	{
		dbMoveObjectDown ( IDObject, IGravity );
	}
	while ( BGround == true )
	{
		dbMoveObjectUp ( IDObject, IUpForce );
	}
}

When I left click on BGravity in the while loop, and then go to define, it says it was never defined. It was though, up at the top...

This worked when in the game program, so I don't know what is wrong with it.

Also, any suggestions on what to add to this, I am going to add jumping, so that you can set which key will make the character jump.

Thanks!

Your signature has been erased by a mod - 120 high maximum please

Back to top

Profile PM

Lilith

16

Years of Service

User Offline

Joined: 12th Feb 2008

Location: Dallas, TX

Posted: 14th Jun 2008 04:38

Link

As far as WhileLoops() is concerned, you never set a value for BGravity. If you were to enter WhileLoops() before you entered Collision() BGravity would have a random value so you couldn't guarantee that a true or false value was set when you performed the loop test. Try setting BGravity and BGround to either true or false on declaration depending on what's appropriate.

Two things to mention:

1. If BGravity is a bool all you need to do si

while (BGravity) { }

and not test it for equality.

2. You never change the value of BGravity inside the loop, unless dbMoveObjectDown() changes it. That means that if BGravity is true going into the loop, the loop will keep running and never exit for the rect of the function to execute.

Lilith, Night Butterfly
I'm not a programmer but I play one in the office

Back to top

Profile PM

programing maniac

16

Years of Service

User Offline

Joined: 19th Apr 2008

Location: Bawk, Bawkity

Posted: 14th Jun 2008 14:01 Edited at: 14th Jun 2008 14:02

Link

Quote: "2. You never change the value of BGravity inside the loop, unless dbMoveObjectDown() changes it. That means that if BGravity is true going into the loop, the loop will keep running and never exit for the rect of the function to execute.
"

Yes, i know that, but It is still not done, it still needs a couple of things in it.

Thanks for the rest of it though, it was helpful. NOw to try it out.

Your signature has been erased by a mod - 120 high maximum please

Back to top

Profile PM

programing maniac

16

Years of Service

User Offline

Joined: 19th Apr 2008

Location: Bawk, Bawkity

Posted: 14th Jun 2008 16:01

Link

Ok, i changed around the header file a bit.

+ Code Snippet

#pragma once
#include "SC_Collision.h"

int IDObject;
int IDGround;

SC_SetupObject ( IDObject, 2, 0 );
SC_SetupObject ( IDGround, 1, 0 );

int IGravity=1;
int IUpForce=1;

bool BGravity;
bool BGround;

void WhileLoops();
void Collision();

void Collision()
{
	if ( SC_GroupCollision ( IDObject, 1 ))
	{
		BGravity = false;
		BGround = true;
	}
	if ( SC_GoupCollision ( IDObject, 1 )== 0 )
	{
		BGravity = true;
		BGround = false;
	}
}
void WhileLoops()
{
	while ( BGravity == true )
	{
		dbMoveObjectDown ( IDObject, IGravity );
		if ( SC_GroupCollision ( IDObject, 1 ))
		{
			BGravity = false;
			BGround = true;
		}
	}
	while ( BGround == true )
	{
		dbMoveObjectUp ( IDObject, IUpForce );
		if ( SC_GoupCollision ( IDObject, 1 )== 0 )
		{
			BGravity = true;
			BGround = false;
		}
	}
}

Now, I am going to make another header file that includes this one and the new header file I want it to be something like sparky's, where it is like

SC_SetupObject ( int Obj, int Group, int Shape );

I want to do

JG_StaticObject ( int GroundID );
JG_Object ( int ObjectID );
JG_Gravity ();

How would I do that?

Your signature has been erased by a mod - 120 high maximum please

Back to top

Profile PM

Sorry your browser is not supported!

Dark GDK / Problem with a header file