2d

I have 2 points in X,Y + Rotation and I need to calculate a bezier spline (a collection of quadratic beziers) that connects these 2 points smoothly. (see pic) The point represents a unit in a game which can only rotate slowly. So to get from point A to B, it has to take a long path. The attached picture shows quite an exaggeratedly curvy path, but you get the idea. What formulas can I use to calculate such a bezier spline? Just saw that I misunderstood your question. Couldn't you use a single cubic hermite splines instead since you have a start and end point and two directions (tangents)? Are

In my spare time I like to play around with game development on the iPhone with OpenGL ES. I'm throwing together a small 2D side-scroller demo for fun, and I'm relatively new to OpenGL, and I wanted to get some more experienced developers' input on this. So here is my question: does it make sense to specify the vertices of each 2D element in model space, then translate each element to it's final view space each time a frame is drawn? For example, say I have a set of blocks (squares) that make up the ground in my side-scroller. Each square is defined as: const GLfloat squareVertices[] = { -1.0,

I am making a simple game and stumbled upon this problem. Assume several points in 2D space. What I want is to make points close to each other interact in some way. Let me throw a picture here for better understanding of the problem: Now, the problem isn't about computing the distance . I know how to do that. At first I had around 10 points and I could simply check every combination, but as you can already assume, this is extremely inefficient with increasing number of points. What if I had a million of points in total, but all of them would be very distant to each other? I'm trying to find a

I am hoping the saveLayer methods will allow me to do draw onto different "layers" and then once the drawing has finished, merge the layers with the canvas in whichever order i choose. The obvious question is "why dont you just rearrange your drawing operations instead?" The answer is I can't: I have a Path that I need to draw onto a Canvas. In the background/lowest z-index I want to draw the path closed and with a few additional points using a fill style. Then on top of that, I want to draw an outline of only the points that were originally in the Path. Since I cannot undo the adding of

If it is passed, is it passed by value or by reference? void printMatrix(vector<vector<int>> *matrix); ... vector<vector<int>> matrix(3, vector<int>(3,0)); printMatrix(&matrix1); Since your function declaration: void printMatrix(vector< vector<int> > *matrix) specifies a pointer, it is essentially passed by reference. However, in C++, it's better to avoid pointers and pass a reference directly: void printMatrix(vector< vector<int> > &matrix) and printMatrix(matrix1); // Function call This looks like a normal function call, but it is passed by reference as indicated in the function declaration.

Basically, I want GDI-type functionality in WPF, where I can write pixels to a bitmap and update and display that bitmap through WPF. Note, I need to be able to animate the bitmap on the fly by updating pixels in response to mouse movements. I've read that InteropBitmap is perfect for this, as you can write to pixels in memory and copy the memory location to the bitmap--but I don't have any good examples to go by. Does anyone know of any good resources, tutorials, or blogs for using the InteropBitmap or some other classes for doing high-performance 2D graphics in WPF? Here's what I found: I