I’m wondering if there’s an easier way to create circular divs than what I’m doing now. Currently, I am just making an image for each different size, but it’s annoying to do this. Is there anyway using CSS to make divs which are circular and I can specify the radius? 15 Answers 15
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I have a line from A to B and a circle positioned at C with the radius R. What is a good algorithm to use to check whether the line intersects the circle? And at what coordinate along the circles edge it occurred? 29 Answers 29
In Python, with Matplotlib, how can a scatter plot with empty circles be plotted? The goal is to draw empty circles around some of the colored disks already plotted by scatter(), so as to highlight them, ideally without having to redraw the colored circles. I tried facecolors=None, to no avail. 6 Answers 6
How can I tell whether a circle and a rectangle intersect in 2D Euclidean space? (i.e. classic 2D geometry) 26 Answers 26
How would I “inflate” a polygon? That is, I want to do something similar to this: The requirement is that the new (inflated) polygon’s edges/points are all at the same constant distance from the old (original) polygon’s (on the example picture they are not, since then it would have to use arcs for inflated vertices, … Read more
I am currently using in my application a listview that need maybe one second to be displayed. What I currently do is using the @id/android:empty property of the listview to create a “loading” text. <TextView android:id=”@id/android:empty” android:layout_width=”match_parent” android:layout_height=”match_parent” android:background=”#FF0000″ android:text=”Loading…”/> Now, I would like to replace that with the animated circle that is used in … Read more
I need to generate a uniformly random point within a circle of radius R. I realize that by just picking a uniformly random angle in the interval [0 … 2π), and uniformly random radius in the interval (0 … R) I would end up with more points towards the center, since for two given radii, … Read more
Having a list of points, how do I find if they are in clockwise order? For example: point[0] = (5,0) point[1] = (6,4) point[2] = (4,5) point[3] = (1,5) point[4] = (1,0) would say that it is anti-clockwise (or counter-clockwise, for some people). 23 Answers 23