Another scrolling question!
BlitzPlus Forums/BlitzPlus Beginners Area/Another scrolling question!
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| If I have a tile map and I want my image to stay centered while scrolling until it reaches edge of the tile map, how would I go about that? I know what I want it to do, but can't get my mind wrapped around it. It's a simple 2D program that scrolls multi-directional. I don't have any code far enough along for scrutiny. Any help would be greatly appreciated. |
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| given .... PlayerX = the position of the player in pixel (relativ to the playgrounds zero) ScreenWidth= window size MaxTilesX = Number of tiles in x direction of the whole playground TileSize = Width of one tile normaly you would show the tilemap with an offset of... StartX = PlayerX-ScreenWidth/2 If the result is below zero you would set .... StartX=0 If the result is behind (MaxTilesX*TileSize - ScreenWidth) you would set ... StartX = MaxTilesX*TileSize - ScreenWidth ....Of course the same with Y At the end you wil draw all tiles with these offsets For i=0 to MaxTilesX
For j=0 to MaxTilesY
DrawImage TileImage , -StartX + i*TileSize , -StartY + j*TileSize
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| Edge Independent Scrolling |
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