polygon

I have to draw a triangle in Python using mathplotlib. This is how it should eventually look like: My objective is, once drawn the triangle, to plot some points on it. At the moment I can draw the triangle just fine: import matplotlib.pyplot as plt from matplotlib.patches import Polygon fig = plt.figure() ax = fig.add_subplot(111, aspect='equal') ax.add_patch(Polygon([[0,0],[0,1],[1,0]], closed=True,fill=True)) ax.set_xlim((0,1)) ax.set_ylim((0,1)) plt.show() But I can only fill it with a solid color. How do I add a gradient like shown in the picture? Can some one help me? There is an example

I am currently trying to write a shader in unity that draws a triangular pattern around countries in a risk-styled game if both countries are not owned by the same player (visual aid to see your borders). Right now, I'm having an issue with making the shader set the countries properly. It always sets country 0 to the left, and country 1 to the right - country 0 and 1 are set programically. The line, a border, can be between 0 and 359 degrees. How I find the countries 0 and 1 is I draw 3 points to the left and right of the midpoint of the line, one .01f, one .1f and one 1f away from the

For any shape how can I create a spiral inside it of a similar shape. This would be a similar idea to bounding (using Minkowski sum). Rather than creating the same shape inside the shape though it would be a spiral of same shape. I found this - http://www.cis.upenn.edu/~cis110/13su/lectures/Spiral.java It creates a spiral based on the parameters passed so it can be for any regular shape. I want the above for all shapes i.e. irregular polygons too. I am not hugely familiar with geometric terminology but I have looked up Involutes and an Internal Spiral Search Algorithm too but haven't been

Is there a way in Libgdx to verify a collision between a Polygon and a Circle? I saw the Intersector class but only found collision test for Circle and Rectangle. What about any other Polygon? If I need to do it manually, what's the best way to do that using Libgdx? So, I managed to create a collision test method between a Circle and a Polygon. At least, it works for me. Here's the code: public boolean overlaps(Polygon polygon, Circle circle) { float []vertices=polygon.getTransformedVertices(); Vector2 center=new Vector2(circle.x, circle.y); float squareRadius=circle.radius*circle.radius; for