I wish to generate rays from the camera through the viewing plane. In order to do this, I need my camera position (\"eye\"), the up, right, and towards vectors (where towards is the vector from the ca
this may sound funny, but i spent hours trying to recreate a knob with a realistic rotation using UIView and some trig. I achieved the goal, but now i can not figure out how to know if the knob is rot
I\'m attempting to draw a circle around a point 开发者_运维知识库on a mapview, which I have successfully done, but not quite the way I wanted to.The CG methods are always going to be drawing relative
I read in an article somewhere that trig calculations are gene开发者_如何学Gorally expensive. Is this true? And if so, that\'s why they use trig-lookup tables right?
Im having little trouble finding a relation between the movement at centre and edge of a circle, Im doing for panning world map,my map extent is 180,89:-180,-89, my map pans by adding change(dx,dY) to
I have a point in a rectangle that I need to rotate an arbitrary degree and find the x y of the point. How can I do this using javascript.
I know the coordinates of A, B and C.. I also know of a vector V originating from C.. I know that the vector intersects A and B, I just don\'t know h开发者_Go百科ow to find i.
My counter goes to 100 at a constant speed. I开发者_如何学Gos there a way to ramp the speed of a counter?
using a Latitude and Longitude value (Point A), I am trying to calculate another Point B, X meters away bearing 0 radians from point A. Then display the point B Latitude and Longitude values.
I am trying to have flash draw a line from the center of the stage out and increment around the stage. Not sure what math I would use to do this though. So far I have the line going out to a certain p
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