shapes

I have a System.Windows.Shapes.Polygon object, whose layout is determined completely by a series of Points. I need to determine if this Polygon is self intersecting; i.e., if any of the sides of the polygon intersect any of the other sides at a point which is not a vertex. Is there an easy/fast way to compute this? Easy, slow, low memory footprint : compare each segment against all others and check for intersections. Complexity O(n 2 ) . Slightly faster, medium memory footprint (modified version of above): store edges in spatial "buckets", then perform above algorithm on per-bucket basis.

I am currently drawing a number of circles on a canvas in a custom view in code. the circles are static and do not change. I would like to draw them using a ShapeDrawable in xml to help clean up my code. I will have a number of different drawables which the user can select and therefore I don't want to do this in code. having 3 or 4 xml drawables seems a lot neater to me. I have created one circle in xml using a ShapeDrawable but am unable to add more than one shape to the xml. How do I add multiple shapes to an xml document using ShapeDrawable. Here's how I did a filled red circle with a one

I'm trying to have a block of text in a div fill a downward triangle shape. Is there any way to achieve this with either CSS or Javascript? This is for a site in which users can dynamically insert text. I'm trying to avoid the alternative method, which is to have them insert text line by line with a limit on each line. gilly3 Your question is very similar to this one . I know of no CSS way, but you can do it with JavaScript. The idea is to find where each line of text breaks and wrap the remaining text in a new child div. You have to use text ranges to accomplish it. See this demo: http:/

I have been trying to draw an annulus (ring with thickness) with a transparent hole and a gradient rim in C# with very little success. Does anyone have any suggestions on how to do this? here's a nice Blend Utility Here's the Final result - thanks to BlueMonkMN Rectangle GetSquareRec(double radius, int x, int y) { double r = radius; double side = Math.Sqrt(Math.Pow(r, 2) / 2); Rectangle rec = new Rectangle(x - ((int)side), y - ((int)side), (int)(side * 2) + x, (int)(side * 2) + y); return rec; } void Form1_Paint(object sender, PaintEventArgs e) { Graphics gTarget = e.Graphics; gTarget

So, when I click and drag a Path2D circle on my JPanel, it is resizing. The problem is that when I initially click-and-drag it, the circle jumps to a smaller size, but then resized correctly as you click and drag. The easiest way to demonstrate is to run the runnable code below. I know I need to fix this code: @Override public void mouseDragged(MouseEvent e) { int mouseX = e.getX(); int mouseY = e.getY(); if (resizing) { System.out.println("resizing"); Rectangle bounds = shapes.get(currentIndex).getBounds(); int shapeX = bounds.x; int shapeY = bounds.y; shapes.get(currentIndex).reset(); shapes

Hi Can I define this shape without using xml code <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <gradient android:startColor="#34342C" android:endColor="#848486" android:angle="90" /> <padding android:left="7dp" android:top="5dp" android:right="7dp" android:bottom="5dp" /> <stroke android:width="1dp" android:color="#FFFFFF" /> </shape> Thanks for your help Yes use a ShapeDrawable to draw your rectangle with the padding you require using a Paint with the appropriate color and stroke width using a Linear gradient and adding this to the Paint as a