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2D All the way! / problem with sidescrollers

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Caleb1994
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Joined: 10th Oct 2008
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Posted: 4th Jan 2009 16:33
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ok so i'm making a mario type sidescroller but when i put in enemies and stuff that moves it doesn't work correctly because the way i'm doing the side scrolling is i'm moving the Hole Ground Sprite on the X when it gets to a certain point. rite now i put the frames into the ground sprite so then i'm just changing the ground image but then i can't delete the enemies and it would require alot of ground sprites hahaha


if you want the code i can post it.
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Destrugter 1
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Posted: 4th Jan 2009 16:53
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Don't delete the enemies. I found out a while back that DBP doesn't have very powerful deleting and loading for sprites. What I would do, is since you are obviously going to be using a lot of the enemies again, I would simply offset it somewhere offscreen...maybe like 800x800...that is of course assuming your game is using the 640x480 resolution.

That's what I do now...maybe it isn't the best practice, but it's the only way I know of currently to effectively do this AND keep your performance.
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Caleb1994
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Posted: 4th Jan 2009 23:32
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for one i'm using dbc.
2. ya that would be a better idea.
3. got any ideas on how to keep the enemy movement while moving the hole ground?
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Mr Kohlenstoff
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Posted: 5th Jan 2009 13:38
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For sidescrolling-purposes the best idea might be to do all calculations and stuff within world-space (ignoring any kind of scrolling), and just use the Scroll-Value/Camera-Position for drawing-operations from worldspace-objects. Thus collision etc. would be calculated compeletely without being influenced of the current camera-position, but pasting enemies would look somehow this way:

paste sprite Enemy(ID).SpriteID, Enemy(ID).x - camera.x, Enemy(ID).y - camera.y

where camera.x and .y define the draw-offset. To bind this camera to a player you'd do something like this:

camera.x = player.x - screen width()/2
camera.y = player.y - screen height()/2

which would make the point player.x|player.y always be in the screen's center.

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Caleb1994
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Joined: 10th Oct 2008
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Posted: 6th Jan 2009 02:01
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um you lost me lol sorry i'v never been very good with the math part lol
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