{"id":2283,"date":"2014-01-24T12:29:38","date_gmt":"2014-01-24T20:29:38","guid":{"rendered":"http:\/\/www.sprixelsoft.com\/?p=2283"},"modified":"2014-01-24T12:29:38","modified_gmt":"2014-01-24T20:29:38","slug":"jumping-off-walls","status":"publish","type":"post","link":"http:\/\/www.sprixelsoft.com\/?p=2283","title":{"rendered":"Jumping off Walls"},"content":{"rendered":"

I got up to learning more 2D platforming this week, though with a friend of 20+ years in town this week I’ve ended up doing far more touristy stuff this week than bi’ness. Actually, 2D platforming is a slight misnomer, as the stuff that I was working with this week was actually 3D.<\/p>\n

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I tried to trouble shoot some of the problems that I was having last week<\/a>, and it seems that the issue that I was having in regards to the animation switching into the jump pose while standing on the corner was related to a couple of things.<\/p>\n

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What I had should<\/strong> be working, except it seems that there must be some floating point precision issues going on. I was very careful to have my ground check (which was being done by using Physics2D.OverlapCircle() to check a radius around a given point for a ground surface) positioned and sized correctly, however it just wasn’t<\/strong> working. As best as I can tell there’s a floating point accuracy issue at fault here because turning Pixel Snap on or off made no difference however if I set my groundRadius to 0.0005 larger than it needs to be, the problem went away.<\/p>\n

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Aside from that , it’s been suggested that I avoid using the OverlapCircle function and instead use a LineCast. I had briefly seen line-casts in use in one of the tutorials, last week however it was already set-up and didn’t require me to do any tinkering. What’s been recommended, is that I use line-casts for detecting different types of surfaces using layer masks. This will make it easier to a: detect edges, and b: detect slopes… apparently using Edge colliders is going to be better than Box colliders. This is the theory at least. I still need to test it.<\/p>\n

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The line casting looks promising though as that’s what allowed Sonic to have different off-balance animations depending on how close he was to standing on an edge. Pair a multi-ray cast check with something to make sure that you’re actually standing still, and you should be able to have a nice set-up.<\/p>\n

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The tutorials that I went with this week were the Sidescroller Platform videos from Sebastian Lague’s YouTube channel<\/a>. These videos go a bit further than the stuff I did previously, and also makes use of 3D models and rigs rather than 2D and sprites.<\/p>\n