How does dbShiftKey() work? - GameCreators Forum

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Mew151

16

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Joined: 1st Jun 2008

Location: Glitch city

Posted: 7th Nov 2008 03:18

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Whenever I try this:

// Dark GDK - The Game Creators - www.thegamecreators.com

// the wizard has created a very simple 3D project that uses Dark GDK
// it can be used as a starting point in making your own 3D games

// whenever using Dark GDK you must ensure you include the header file
#include "DarkGDK.h"

// the main entry point for the application is this function
void DarkGDK ( void )
{
	dbSetDisplayMode( 1024, 768, 32 );
	//Dbsync
	dbSyncOn( );
	dbSyncRate( 60 );
	dbMaximizeWindow( );
	//Load objects, and position camera
	dbLoadObject( "Block pet_x.x", 1 );
	dbLoadImage("fire.bmp", 2);
	dbPositionCamera( 0, 0,-10 );
	dbRotateObject(1, dbRND(255.0f), dbRND(255.0f), dbRND(255.0f));
	//Create particles
	dbMakeParticles(3, 2, 500, 10.0f);
	dbPositionParticles(3, 0, 0, 0);
	dbColorParticles(3, 255, 100, 0);
	dbSetParticleEmissions(3, 10);
	dbSetParticleSpeed(3, 0.01f);
	dbSetParticleGravity(3, .6);
	while (dbShiftKey() == 1)
	{
		dbHideParticles(3);
	}
	while (!dbEscapeKey( ))
	{
		while ( LoopGDK ( ) )
		{
			dbSync( );
		}
	}
	return;
}

+ Code Snippet


// Dark GDK - The Game Creators - www.thegamecreators.com

// the wizard has created a very simple 3D project that uses Dark GDK
// it can be used as a starting point in making your own 3D games

// whenever using Dark GDK you must ensure you include the header file
#include "DarkGDK.h"

// the main entry point for the application is this function
void DarkGDK ( void )
{
	dbSetDisplayMode( 1024, 768, 32 );
	//Dbsync
	dbSyncOn( );
	dbSyncRate( 60 );
	dbMaximizeWindow( );
	//Load objects, and position camera
	dbLoadObject( "Block pet_x.x", 1 );
	dbLoadImage("fire.bmp", 2);
	dbPositionCamera( 0, 0,-10 );
	dbRotateObject(1, dbRND(255.0f), dbRND(255.0f), dbRND(255.0f));
	//Create particles
	dbMakeParticles(3, 2, 500, 10.0f);
	dbPositionParticles(3, 0, 0, 0);
	dbColorParticles(3, 255, 100, 0);
	dbSetParticleEmissions(3, 10);
	dbSetParticleSpeed(3, 0.01f);
	dbSetParticleGravity(3, .6);
	while (dbShiftKey() == 1)
	{
		dbHideParticles(3);
	}
	while (!dbEscapeKey( ))
	{
		while ( LoopGDK ( ) )
		{
			dbSync( );
		}
	}
	return;
}

Whenever I have tried pressing shift key, the particles don't disappear.

(By the way, the .x file I loaded is just a red cube.)

ow! that hurt!

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Mason

20

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Joined: 20th Mar 2004

Location: Arizona

Posted: 7th Nov 2008 05:00 Edited at: 7th Nov 2008 05:07

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The following code needs to be altered and placed inside your main game loop:

+ Code Snippet

	while (dbShiftKey() == 1)
	{
		dbHideParticles(3);
	}

It doesn't work because when the program executes the code it hits the while loop and checks to see if dbShiftKey() == 1. If this is currently true (which its most likely not unless your holding the shift key right as the program starts) it will hide the particles. Most likely the shift key isn't being held yet so realistically dbShiftKey() == 0 not 1.

The program then passes the while loop without executing the dbHideParticles() command. Then it continues onto the next loop until you exit.

In order to fix it, just replace the while( dbShiftKey() == 1 ) statement with the an if statement and make sure you move it into the main program loop.

+ Code Snippet

	while ( LoopGDK ( ) )
	{
		if(dbShiftKey() == 1)
		{
			dbHideParticles(3);
		}
		else
		{
			dbShowParticles(3);
		}

		dbSync( );
	}

Also, I would suggest removing the while (!dbEscapeKey( )) because the code isn't needed. while( LoopGDK()) takes care of the escape key and window escapekey itself.

Lastly I'm guessing once you let go of the space key you would like to have the particles visible again. I added an else block to the if statement so once you let go the particles are visible again. There might be a more practicle way to do this, but it works just fine. Let me know if that helps

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Mew151

16

Years of Service

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Joined: 1st Jun 2008

Location: Glitch city

Posted: 8th Nov 2008 00:54

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Thanks! That really helped! I also solved another problem, rotating the cube while pressing shift. Thanks again!

ow! that hurt!

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Dark GDK / How does dbShiftKey() work?