2d

Given a square (described by x, y, width, height) and an angle (in radians) I need to calculate a vector that originates at the squares centre and terminates at the point that collides with the edge of the square at the given angle. I'm really most interested in the point it collides at so if that would make calculation more efficient let me know. Can this be generalized to Rectangles? How about polygons in general? The vector will be center + (cos(angle), sin(angle))*magnitude . Given that you want to intersect this with a square, you need to determine magnitude. You can get that with a

I'd like to resize a circle on my canvas with the help of a slider. This circle can be moved around on the canvas by some drag&drop stuff I did in code behind, so its position is not fixed. I have bound the slider's value to an ellipse's height and width. Unfortunately, when I use the slider, the circle gets resized with its top left point (actually the top left point of the rectangle it's sitting in) staying the same during the operation. I would like to resize it with its center point being constant during the operation. Is there an easy way to do this in XAML? BTW, I already tried

I'm working on an RPG game that has a Top-Down view. I want to load a picture into the background which is what the character is walking on, but so far I haven't figured out how to correctly have the background redraw so that it's "scrolling". Most of the examples I find are auto scrolling. I want the camera to remained centered at the character until you the background image reaches its boundaries, then the character will move without the image re-drawing in another position. Your question is a bit unclear, but I think I get the gist of it. Let's look at your requirements. You have an

I have a random 2D image. I would like to be able to present the image in 3D. This doesn't have to be very detailed, even if the image were arbitrarily broken into layers like a pop-up cutout from a children's book. The goal would be that a given image would look normal when directly viewed but that if a viewer were to move/tilt left, right, up, down there would be a 3d effect. This is similar but not exactly the same as this question here: How to create 3D streoscopic images using MATLAB with image tool? This is complete over-kill: http://make3d.cs.cornell.edu/ And this is probably on the

$mainMenu['Home'][1] = '/mult/index.php'; $mainMenu['Map'][1] = '/mult/kar.php'; $mainMenu['MapA'][2] = '/mult/kara.php'; $mainMenu['MapB'][2] = '/mult/karb.php'; $mainMenu['Contact'][1] = '/mult/sni.php'; $mainMenu['Bla'][1] = '/mult/vid.php'; This is a menu, 1 indicates the main part, 2 indicates the sub-menu. Like: Home Map -MapA -MapB Contat Bla I know how to use foreach but as far as I see it is used in 1 dimensional arrays. What I have to do in the example above? You would need to nest two foreach BUT, there is nothing about your data structure that easily indicates what is a sub-item.