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Newsletter #29 - Victory! (probably...)

posted in IfThen Software
Published May 01, 2009
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News

Overall progress for the Loradon 3.0 Preview has reached 72%!
www.ifthensoftware.net/loradon_online/progress/


From the Programmer
Written by Invisible

Thanks to oliii from the gamedev.net community, I think the sphere-AABB collision detection and response is finally working! His solution to figuring out if the sphere is moving away from the AABB appears to work correctly in the demo, so I have high hopes for it working correctly in the actual game.

oliii's solution is quite simple actually. Simply project (dot product) the sphere's movement vector onto the collision normal and check the sign of the result. If it's negative, the sphere is moving towards the AABB.

oliii also showed me how to get "sliding" to work. "Sliding" is a way to prevent the moving sphere from stopping dead in it's tracks as soon as it hits something. If the sphere was moving at an angle to the collision surface, it will smoothly move along it rather than come to an abrupt stop. To do this, the distance the sphere was able to be moved is removed from the sphere's movement vector. The movement vector is then projected onto the collision normal and the result is multiplied by the collision normal. This creates a vector along the normal which, when subtracted from the movement vector, creates a new vector that will cause the sphere to "slide".


Artist's Easel
Written by GreyKnight

I made a mistake with the perspective, so I'm starting over. I'm drawing the skeleton on the computer this time. It's easier to make measurements now. When this is done, I'll shade the lines a faint grey and print it out on Bristol paper. I'll then use that as a base to draw over. I hope this works out.

Character Creation Background
Part #3

(Click to enlarge)


Drawn with:
MS Paint
Wacom Graphire4 Tablet


I put together a quick example of what it will basically look like when it's done.

(Click to enlarge)


Drawn with:
MS Paint
Wacom Graphire4 Tablet
Jasc Paint Shop Pro 7


Community Spotlight
Written by pifreak

On the SAO forums, it's great to see Lee active again :D I see he sort of revived the Game Discussion section with a new thread. Also, another cool thing that happened this week was the making of an
">SAO trailer
. It is cool to see a preview of the game so people can see it, and it is a great contribution from miotatsu!

From Loradon 3.0 there hasn't been much programming done. Don't be disappointed, because this is a way for InvisibleMan to take a break from the hard and confusing work, recently of collision detection, as he has described. GreyKnight has still been doing artwork, so things are happening behind the scenes of Twitter and the progress page! I hope some progress will go up, still.
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