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Nov
9
revised Extra $100 after borrowing and shopping
formatting, wording
Nov
9
suggested approved edit on Extra $100 after borrowing and shopping
Nov
9
comment Optimizing response times of an ambulance corp: short-term versus average
To explain "Voronoi tessellation" it might be worth including an image from a google image search from that phrase. It certainly helped me understand it. Great explanations though!
Sep
21
comment What are imaginary numbers?
@Joe, and OP: That article could probably go in the answer. It is a great resource.
Aug
23
awarded  Autobiographer
Jul
27
awarded  Supporter
Jul
27
accepted Function to make values close to zero, zero leaving others as is
Jul
27
awarded  Editor
Jul
27
revised Function to make values close to zero, zero leaving others as is
added 55 characters in body
Jul
27
comment Function to make values close to zero, zero leaving others as is
Sorry for not being clear. The output of $f$ should be a 2d vector. x is a real number that defines the range of values of each component of $v$ that will become zero.
Jul
27
asked Function to make values close to zero, zero leaving others as is
May
26
comment Step function for greaterthan
@Chris. In HLSL (High Level Shader Language) any conditional (in a loop especially) is very bad, as the graphics card can't do so much in parallel. (it has to wait for the longest running branch to finish... or something). Not sure why, but on the xbox, adding an if statement to conditionally break out of a loop early was vastly more expensive than completing the loop in all cases. Same with step (which is an intrinsic function of HLSL). My knowledge doesnt extend to the "why" unfortunately. See my question here
May
26
comment Step function for greaterthan
Ahh ok, think i understand now. Thanks for the extra answer.
May
26
comment Step function for greaterthan
I understand your first paragraph, thanks for the insight. Not quite following the second part though. Are you giving an example of how to do an absolute value function? I don't understand how that helps deal with the case x = y.
May
26
awarded  Scholar
May
26
comment Step function for greaterthan
That's exactly what i was after, thanks.
May
26
accepted Step function for greaterthan
May
26
awarded  Student
May
26
comment Step function for greaterthan
@joriki, exactly, if someone can work out the formula for f(x, y) then i can do the translation into HLSL so no programming knowledge is needed or involved. I merely included a bit of background to aid any future searchers.
May
26
comment Step function for greaterthan
Sorry, i don't understand. The reason for this question is programming related, but the question (what mathematical function is 0 when x < y and 1 when x >= y) is a mathematical one. (isn't it?)