World
61–70 of 102 posts
Re: World
#62Re: World
#63Earlier quoted context omitted.
Movement is relative.
Only inertial movement. Turning is still absolute. (At least in special relativity.)
Re: World
#64Earlier quoted context omitted.
Doesn't look like the code is that similar. Doesn't look like copyright has anything to do with it. Does Endoh have a patent? That would of course be a different matter.
I'm not alleging a law was broken -- just that the author should have given credit for inspiration.
Re: World
#65Re: World
#66Re: World
#67Earlier quoted context omitted.
Almost any kind of rotation in 2D or 3D graphics involves cos or sin. The spinning was going the wrong way, therefore the way to reverse it was to reverse something involving cos or sin. You can then just bruteforce it by reversing each cos until you get the effect you want. (If reversing cos seems to reverse something "perpendicular" to what you want, then you'd need to reverse the sin instead, not the cos.) This is…
I'd also note that in a point on the unit circle, cosine is the x coordinate and sine is the y coordinate. A good reason to try flipping a cosine first. See this: http://en.wikipedia.org/wiki/File:Unit_circle.svg (I still remember how people would describe trig in high school, it is a wonder more teachers didn't explain the cos = x, sin = y thing. Probably because my teachers did not understand math.)
Re: World
#68Earlier quoted context omitted.
I'd also note that in a point on the unit circle, cosine is the x coordinate and sine is the y coordinate. A good reason to try flipping a cosine first. See this: http://en.wikipedia.org/wiki/File:Unit_circle.svg (I still remember how people would describe trig in high school, it is a wonder more teachers didn't explain the cos = x, sin = y thing. Probably because my teachers did not understand math.)
My teachers did explain it that way. European school, if that matters.
Heh. Yeah, that matters.
In my experience, US highschools are very much "Okay class, today we're going to memorize these formulas."
Re: World
#69It's spinning in the wrong direction!
Re: World
#70It's spinning in the wrong direction!
... and the top comment is typical negative nitpicking!
Why HN? Why?! There must be a better way!