I'm trying to make half of a rectangle - devided diagonally - to fit inside a triangle. Rotation works well, so does sizing of the rectangle. But once I try to skew it, it all gets messed up. Basically I want to simulate a 3D surface.   That mean...
I am rendering SVG image dynamically and created rotated text. If the rotated text is overlap with other text, i need to remove that text. But i can't measure the rotated text to create bounds and check with next label text region.  I have create...
I know a matrix [x scale, y skew, x skew, y scale, trans x, trans y], and would like to get the angle in degrees.   thanks!...
I have a value and its cosine as:  -0.2567721374914637 Cosine: -0.04253775592822526   Compare what we get in Python:  >>> import math >>> math.cos(-0.2567721374914637) 0.9672147629178562   Is there a way I can do trig in JavaScript...
I've got a mousemove cursor in my game which will make my object shoot towards my mouse cursor. I'd like my object to always rotate along to be in line with my mousecursor. How can i  convert the X and Y of where the cursor is to a degree ang...
I developing a HTML5 Canvas App and it involves reading a xml file that describes the position of arrows, rectanges and other shapes I need to to draw on the canvas.  Example of the XML layout:  <arrow left="10" top="20" width="...
I know this has been asked a few times before, but there has been no answer that actually works that I can find. There is a similar one, but the speed varies depending on the distance travelled.  So my problem is that I am trying to get an object (a...
I have a problem with Math.sin. I thought it would output the sinus of the given integer. So I tried Math.sin(30) and my output was -0.9880316240928618 and then I checked with my calculator and it was 0.5....
How would I get 4 points rotated a certain degrees around a pointer to form a rectangle? I can rotate a point around a point, but I can't offset it to make a rectangle that isn't distorted....

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