imagecollide / type deletion
Blitz3D Forums/Blitz3D Beginners Area/imagecollide / type deletion
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| I have some problems with my code for a new game I'm making. Its the first time that I'm using types and the following code produces an error message: [code] for e.enemy = each enemy for b.bullet = each bullet if imagerectcollide(enemyImg,e\x,e\y,0,b\x,b\y,8,1) then delete b delete e end if next next [\code] It gives me this error: Object does not exist! What am I doing wrong? |
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| You are deleting e before you are finished with it. Set a flag and delete e in the outer loop. |
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| its because the loops are trying to perform actions on objects which have been deleted (the enemy object). quickest solution: add a field to the enemy type like field deadand flag it 'true' if imagescollide is satisfied. like this: [code] if imagerectcollide(enemyImg,e\x,e\y,0,b\x,b\y,8,1) then e\dead=true delete b [code] next, check whether e\dead=true outside of this loop and, if so delete it. i'm rambling now, so i'll just show you :) [code] for e.enemy = each enemy for b.bullet = each bullet if imagerectcollide(enemyImg,e\x,e\y,0,b\x,b\y,8,1) then e\dead=true delete b end if next if e\dead then delete e next [\code] this should work. have fun. |
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| Thanks guys, I didn't think about that, well that just goes to tell that after hours of programming you tend to overlook the most obvious. Maybe now I can get on with my game. |
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| or you could just exit the bullet loop like: delete e exit |
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| well, yes I guess I could, but what if more than one bullet hits the enemy. I would like it to remove any bullets hitting. I changed my code as per DarkNature and DJWoodgate and it worked out just fine. Thanks again guys. |
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