Covered area of convex/concave shape
BlitzMax Forums/BlitzMax Programming/Covered area of convex/concave shape
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| How can I return a percentage of area covered? It's a tricky beast. The convex or concave 2d shape would be covered by rects of various sizes only. Any math genius able to assist please? |
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| Go through all the rectangles and add up rectwidth*rectheight to get a total? |
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| Hmm perhaps it would be best to triangulate the shape then find the sum of each triangles area. You want to turn your concave shape into convex triangles I think. If I recall any shape can be broken down into triangles and the area of a triangle is simply 1/2 base * height. You can get the formula here. http://www.mathgoodies.com/lessons/vol1/area_triangle.html Sadly I don't know how the best way to dynamically make triangles from a concave shape. |
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| I probally didnt explain it very well. Imagine a drawing on the floor, a shape such as a star made from 2d points. Now take a small block and place it on the shape. What area of the star is covered. (brain explodes) |
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| Break it into triangles, figure their dimensions, and do the math... Do you have specific sizes for the problem? |
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