Ambiera ForumDiscussions, Help and Support. |
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@Niko I have 2D Flat polygon coordinates. The number of coordinates varies and I will need to assign it a color or a texture, or both. How do I create this polygon in Coppercube with Javascript and give the polygon a fixed height in order to make it 3D. |
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I just need some sample code for this in order to get started |
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Basically I need to loop through these coordinates that I am pulling out of a database. All that stuff is fine... I just need sample code for a 5 point polygon of irregular shape....where the points could be anything. Given that the points are 2D... Which means that it will be something like this 234.345, 545.5544, 0 There will always be a 0 on the end which I will make a fixed number. Then I just add a texture and a color My programming skills are good, but my maths skills are terrible and I dont understand the triangle tutorial very well because I don't understand the jargon for 3D meshes. So some sample code should fix that. |
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That's actually a pretty difficult task. Google a bit for "polygon triangulation ": this is really tricky, and not easy at all. You would have to write some complicated algorithm to do this for you. Creating single triangles is easy, but filling a random shape to be made out of triangles is not. If you just want to create a triangle in CopperCube, it works like this: The 3D engine has a set of 3D positions, like these 3: (10, 5, 6) (23, 34, 4) (3, 7, 8) (I just entered some random numbers, but this is what you do in CopperCube using ccbAddMeshBufferVertex()) Now, you can link those to form a triangle, using indices into this array of 3D points. Which basically connects the 3 points together, forming a triangle: 0 1 2 It would also be possible to do this the other way round, then you would get a triangle facing into the opposite direction: 0 2 1 These indices are what you add using ccbAddMeshBufferIndex(). And that's basically it. Hope this made sense. |
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