Map collision ideas
BlitzMax Forums/BlitzMax Programming/Map collision ideas
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| Hey guys, I've been working on a game with map collision and detection. I use a piece of code that is somewhat related this: I was wondering if anyone has any other ways of detecting map collisions. |
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| That's basically it. An alternative collision approach is to let the player potentially overlap the wall block, detect that he is doing so, then `move him backwards` in the opposite direction that he came from, or push him to the very edge alignment with the wall. I haven't really programmed something like this myself but I'd probably do it the way you are - just checking the surrounding cells and not letting the player move if the upcoming cell is solid. |
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| Yup, pretty much what you're doing, twinprogrammer. Why thwe question though, unless you want something that your collision is lacking? |
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| hmm, ok lets open the birdcage to the cat... - lets assume that the map is map[x,y], and x,y are integers. and this can be mapped as a zelda style or rogue style. your main character (lets call it man) can live at any map location, so we have Man.x and Man.y - we can check the contents of a map by checking Man.xy against Map.xy and get the result as given in the first post ----- so far so good :) but this assumes that we can only move in integer blocks! For smooth movement that should ideally be in float so you don't move right by going Man.x+1, you actually do it by Man.y+0.1 That means at any time you Man can occupy up to 4 Map positions at once, and your map checking has increased by a factor of 3. - 3 I hear you say, where do you get this from? - Man.x = 3, Man.x+0.1 = 3.01, so we check Map.x,y-1 Map.x,y Map.x,y+1 - we need to check the + and - y as we can't be sure that y will be a whole number now. I could go on about the width of walls vs Man position, or small Man vs Big Monster... Just a thought?? |
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| Hello, back in the day when was doing a Super Mario clone and moving the character was done in fractional numbers I checked something like: a) Current location b) Character movement amount c) If a + b is inside solid then count the max movement that doesn't put character inside solid d) Draw character -Henri |
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| Thanks for all of your input guys! |
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