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Atari demoscene BBS
| Re: Collision detection |
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Posted by: Patrice Mandin
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Jul,30.2004-17:21
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Here is the theory about collision detection:
- Check if bouding boxes of the 2 sprites you want to test have an intersection zone or not.
- In this case, do a AND between the 2 sprites, by taking in account only the pixels in the intersection zone, for both sprites (you need to use the sprite's mask).
With the blitter, I copy the intersection zone of the sprite 1 in a buffer, then ANDing the intersection zone of sprite 2 with this buffer.
- Then, check if the resulting value has zeroes for all bits (no collision) or not (collision!).
With the blitter, I do an OR with the result of the previous operation for all sources words, in a unique destination word, then just check if this word is zero or not.
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[All messages in this thread] [Start new thread]
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Topic
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Posted by
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Date
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Collision detection
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Bod/STAX
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Jul,29.2004-19:27
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Re: Collision detection
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Bod/STAX
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Jul,29.2004-19:28
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Re: Collision detection
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ray
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Jul,29.2004-20:01
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Re: Collision detection
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Patrice Mandin
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Jul,30.2004-17:21
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Re: Collision detection
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Patrice Mandin
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Jul,29.2004-20:40
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Re: Collision detection
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Bod/STAX
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Jul,29.2004-21:00
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Re: Collision detection
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Bod/STAX
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Jul,29.2004-21:11
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Re: Collision detection
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Patrice Mandin
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Jul,30.2004-10:57
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Re: Collision detection
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Bod/STAX
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Jul,30.2004-13:07
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Re: Collision detection
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gwem
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Jul,30.2004-13:20
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What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
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