I'm a relatively young java developer. I don't know much geometry yet. I need to know what the algorithm is (in code form) to move an object towards the direction it is rotated in. Thanks!
I have a 2.67 GHz Celeron processor, 1.21 GB of RAM on a x86 Windows XP Professional machine. My understanding is that the Android emulator should start fairly quickly on such a machine, but for me it does not. I have followed all instructions in setting up the IDE, SDKs, JDKs and such and have had some success in staring the emulator quickly but is very particulary. How can I, if possible, fix this problem?
(Learning basic geometry/basic vector math would help a lot i.e. http://www.helixsoft.nl/articles/circle/sincos.htm)
ReplyDeleteIf your direction is some sort of vector - just offset current position by corresponding x and y components (potentially scaled).
If you direction is by angle - use sin/cos to compute offsets and scale:
x = speed * cos (angleRadians);
y = speed * sin (angleRadians);
To transform degrees to radians - divide by PI.