2d

I'm sure there must exist a way to do the following but I don't know what it's called so I cannot google it. I need an algorithm to go from A to B. Does someone know what it's called or has a link to it? EDIT: Sorry I wasn't clear enough. Figure A is made up of squares and I basicly need an algoritm which removes the squares and turns it into a polygon(Figure B). The input is a plain list of axis aligned squares, the output should be a list of vertices which make up a polygon. The squares will always be aligned like on a grid, they will not overlap. To make it more clear, I want to write a

I drew a line that is at an angle based on a slider. I am trying to make the line's end Y coordinate a certain number (let's say 300), even if it is at an angle. Any ideas on how to do this? Here is the work on my line so far: double angle = intAngle; angle = angle * Math.PI / 180; double length = 300; graphics.setColor(Color.RED); double startX = 300; double startY = 100; double endX = startX + length * Math.cos(angle); double endY = startY + length * Math.sin(angle); double end2X; double end2Y; double dblAngle; double angle2; int intAngle2; double start2X = endX; double start2Y = endY;

I have a 2D array of pointer main.c Int32 * pRxSeqAddr[2][2]; func(pRxSeqAddr); / func.c void func( Int32** pRxSeqAddrPtr) { /// } I get this error: argument of type "Int32 *(*)[2]" is incompatible with parameter of type "Int32 ** I know if it was 1D array of pointer then this function call is fine, but 2D is nagging me.. please help Change func.c to: void func(Int32 *pRxSeqAddrPtr[][2]) { } In general, to pass 2D arrays to functions you need to specify the array dimensions for all but the first dimension, so in this example you need the [2] for the last dimension but you can optionally omit

I'm trying to fill an array in spiral order. So far, I can print the array in spiral order, but is there a way to modify the array so that i can fill it in spiral order and then just print the array? I'd like it to go in decreasing order like a countdown. Please help! public class Spiral { public static void main(int m, int n) { // create m by n array of integers 1 through m*n int[][] values = new int[m][n]; for (int i = 0; i < m; i++) for (int j = 0; j < n; j++) values[i][j] = 1 + (m*n)*i + j; // spiral for (int i = (m*n)-1, j = 0; i > 0; i--, j++) { for (int k = j; k < i; k++) System.out

I'm attempting to generate infinite random terrain. The terrain should generate the same every time given the same seed. I've tried using Java's Random function, creating the seed using various functions of the x and y co-ordinates of the given node on the terrain grid. Such as x*y+x+y+seed, 20*x+30*y etc. The problem with this approach is that I always see clear patterns in the numbers generated. So basically what I want is: f(x,y) = Random Number It would be helpful if the above function could include a seed of some sort, making it: f(x,y,seed) = Random Number I will need to generate several

What's the difference between System.Drawing.Point and the System.Windows.Point ? In what context should which one be used? I'm working with WPF. System.Drawing.Point represents a GDI point and is used in Windows Forms. It can only hold integer values. WPF doesn't use GDI anymore, so it has its own System.Windows.Point type to represents a point, which can have non integer values. One is used with the classes in System.Drawing namespaces, and one is used with WPF. The System.Drawing.Point is not so surprisingly used with the classes in the System.Drawing namespaces. The System.Windows.Point is

In Java, how would one employ PathIterator to iterate through the line segments that constrain an Area ? The Area is bound only by lines (but curve support wouldn't hurt). The method should return a collection of all the line segments. Peter This works (in all situations, I believe), but it might require more thorough testing: Area area; // The value is set elsewhere in the code ArrayList<double[]> areaPoints = new ArrayList<double[]>(); ArrayList<Line2D.Double> areaSegments = new ArrayList<Line2D.Double>(); double[] coords = new double[6]; for (PathIterator pi = area.getPathIterator(null);