Thanks, Ian, ----- Original Message ----- From: "Ian Hickson" <[EMAIL PROTECTED]> Subject: Re: [whatwg] [canvas] rotate.
| > | > Coordinate system of the <canvas> is x-axis : top-to-bottom and y-axis | > is left-to-right. Let's say we have some vector of the length 1 and | > angle 0. How it is located in respect of the axis? | | The canvas API doesn't have vectors. The only two functions that take | angles are (a) the arc() method, whose definition defines its | interpretation as radians clockwise from the positive x-axis, and (b) the | rotate() method, whose definition again defines its interpretation as | radians clockwise. Yep. That was may second question: angle direction. Usualy in y-to-top and x-to-right systems direction of angle rotation is counterclockwise Seems like here we have strictly mirrored (around x-axis) coordinate system. That I guess needs to be defined somewhere ... Andrew Fedoniouk. http://terrainformatica.com
