Small Problem with "dbMoveSprite"

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Fr4gory

18

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Joined: 13th Nov 2005

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Posted: 22nd Jun 2009 01:11

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Started today on experimenting with sprites, I tried to use dbMoveSprite command to move the sprite to the right and the left, but instead it moves up and down. Any suggestions why it does?

Here's the code used

+ Code Snippet

#include "DarkGDK.h"
void DarkGDK ( void )
{
	dbSyncOn   ( );
	dbSyncRate ( 60 );
	dbLoadImage ( "background_forest.jpg", 1 );
	dbLoadImage ( "panda.png", 2 );
	dbLoadImage ( "grunt.png", 3 );
	dbSprite ( 1, 0, 0, 1 );
	dbSprite ( 2, 100, 100, 2 );
	dbSprite ( 3, 100, 400, 3 );
	dbSetImageColorKey ( 255, 0, 255 );

	while ( LoopGDK ( ) )
	{
		if (dbRightKey()==1)
		{
		dbMoveSprite(2,2);
		}
		if (dbLeftKey()==1)
		{
		dbMoveSprite(2,-2);
		}
		if (dbSpriteCollision(2,3) ==1)
		{
		dbWaitKey();
		}
		dbSync ( );
	}

	return;
}

Any help would be highly appreciated, thank you

Michel Cilissen - CiliSoft Software Solutions
michel@techblog24.com - http://www.cilisoft.tk

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Bran flakes91093

16

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Joined: 13th Sep 2008

Location: Crazy Land

Posted: 22nd Jun 2009 03:34 Edited at: 22nd Jun 2009 03:35

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dbMoveSprite can only move in two directions relative to the rotation of a sprite. A sprite with a rotation of 0 or 180 will move up/down. A sprite with a rotation of 90 or 270 will move left/right. But rotating the sprite might look weird, so my suggestion is to have a variable for each of the sprite's coordinates.

+ Code Snippet

#include "DarkGDK.h"
void DarkGDK ( void )
{
	dbSyncOn   ( );
	dbSyncRate ( 60 );
	dbLoadImage ( "background_forest.jpg", 1 );
	dbLoadImage ( "panda.png", 2 );
	dbLoadImage ( "grunt.png", 3 );
	dbSprite ( 1, 0, 0, 1 );
	dbSprite ( 2, 100, 100, 2 );
	dbSprite ( 3, 100, 400, 3 );
	dbSetImageColorKey ( 255, 0, 255 );

        int x = 100,
            y = 100;

	while ( LoopGDK ( ) )
	{
                if(dbUpKey())
                    y -= 2;
                if(dbDownKey())
                    y += 2;
		if (dbRightKey()==1)
		{
		    x += 2;
		}
		if (dbLeftKey()==1)
		{
		    x -= 2;
		}
		if (dbSpriteCollision(2,3) ==1)
		{
		    dbWaitKey();
		}
                dbSprite(2, x, y);
		dbSync ( );
	}

	return;
}

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