I want to make rolling cube like dice that reacts on accelerometer. So accelerometer gives parameters for cube moving. I think that small physic should be used here. My question is what formulas, techniques should I use to accomplish this without any physics engine.
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3"Dice" is already plural. One die, many dice. – DJClayworth May 25 '11 at 16:04
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Voting to close as too broad / tool rec. – Ciro Santilli Путлер Капут 六四事 Apr 29 '16 at 09:45
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You will need probably to use OpenGL for that. There a good physics tutorial for OGL here
Specifically for dice, take a look at this nokia demo. It's written in cpp (source here)
On the physics side, you can take a look at this site.
Anyhow, I do not think you need real physics for the app, but just an approximation:
- I would start getting a velocity that depends on the accelerometer (plus or minus, let's say, 20%) and random angular speeds for the dice.
- Then, find the trajectory for each and when touching a border.
- Bounce them to one direction or another depending on the rotation at that particular moment.
- Change the sign of the angular speed if the dice bounce back.
- Reduce the speed about 50% each bounce, until a threshold.
- Below that threshold, leave them in the floor and stop movement.
Aleadam
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