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 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'm trying to understand the math on this raphael.js demo:  http://raphaeljs.com/pie.js  Checkout the sector method:  function sector(cx, cy, r, startAngle, endAngle, params) {     var x1 = cx + r * Math.cos(-startAngle * rad),         x2 = cx +...
Consider the following triangle :    I want to calculate angle X  I have the following :      var opposite = 2.5;     var hypotenuse = 5;      var sinOfAngleX = opposite / hypotenuse; // 0.5   So now I know that Math.sin(valueofAngleX) would return 0...
Ok, I will try and be as concise as possible. I am not very good with math and what might seem obvious to you will most likely be rocket science to me.  I am using Three.js w/CSS3DRenderer to create a virtual gallery space.  I need a first person per...
I've searched for the answer to this and have tried many proposed solutions, but none seem to work.  I've been struggling with this forever so any insight is greatly appreciated.  I have 3 shapes (vectors I suppose) on a JS canvas, each with...

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