Cocos2d-x 3 beta : polygon not drawn right
c++, cocos2d-x
Solution
I know that as of the first release of Cocos2d-iphone v3 it still does not support concave polygons. So, you probably need to triangulate the polygon and then drawPolygon. I have done this with both the library poly2tri (https://code.google.com/p/poly2tri/) and a simple Triangulation C++ class (http://www.flipcode.com/archives/Efficient_Polygon_Triangulation.shtml). Both of these work great if you have no transparency, but a little bit of aliasing causes strange effect if you are using transparency because the triangles have a miniscule amount of overlap.
I know that cocos2d-iphone will have support for concave polygons in the near future (I can see it in one of the branches where they are doing a re-write of the renderer).
Problem
Im using DrawNode as recommended to draw polygon but the problem its not drawn right as i like i attaching the image of the desired polygon shape and one that is output of my code that output wrong . the code : ``` if (sprite && sprite->init()) { sprite->setTextureRect( Rect(0, 0, 200 ,200) ); sprite->autorelease(); auto draw = DrawNode::create(); { Point Block1[] = { Point(0,0), Point(30,0), Point(50,10), Point(80,10), Point(100,0), Point(200,0), Point(200,40), Point(100,40), Point(80,50), Point(50,50), Point(30,40), Point(0,40) }; draw->drawPolygon(Block1,12 ,Color4F(1,222,120,1), 1, Color4F(0,0,1,1)); } sprite->addChild(draw, 10); } else { CC_SAFE_DELETE(sprite); } ``` This is the output of the code it is wrong this is the polygon i like to be drawn ( never mind the colors)