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Old 16 December 2018, 13:24   #1
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Ocs clxdat & clxcon


-Qst for Amiga 500 OCS-

I have pain in the butt understanding how works these hardware collision detections registers.
I'm trying to detect collision between sprites and bobs. The screen is dualplayfield.

I set all bits on in CLXCON once at start and then at each frame I read CLXDAT then I "AND.W" it with #%0000000111100000

It doesn't work.
Any help because the mist is deep ^^
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Old 16 December 2018, 14:01   #2
Toni Wilen
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If you set all bits, you only get collision if all 6 planes had bit set which probably isn't what you wanted?

Perhaps this helps: http://eab.abime.net/showpost.php?p=965074&postcount=2
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Old 16 December 2018, 18:19   #3
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When you start to input random values, that means you must pass.
Too bad because this hardware feature would have saved some raster time.
Anyway, thanks for helping.
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Old 20 December 2018, 10:27   #4

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Please check my very simple game - there is used hardware collision.


If you have questions then just ask.
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Old 21 December 2018, 16:45   #5
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Thanks for the help. Much appreciated.
I checked your code and it seems I use a similar method than yours.
But I use a dualplayfield, may be it's what makes the pb.
It's like it only detects a certain color or so.
Anyway, as I lost too much time on this hardware method, I skipped to a cross box detection, it's not very accurate but it does the job.
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Old 08 February 2019, 15:35   #6
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Dual Playfield is perfect for collision detection
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