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Thread: ES: Tessellation:how represent a convex or concave polygon?

  1. #1

    ES: Tessellation:how represent a convex or concave polygon?

    ES: Tessellation:how represent a convex or concave polygon?

    Giuseppe

  2. #2
    Senior Member
    Join Date
    May 2006
    Posts
    353
    Could you perhaps describe in more detail what exactly you want to know?
    Georg Kolling, Imagination Technologies
    Please ask questions specific to PowerVR hardware or SDKs on the PowerVR Insider Forum
    DevTech@imgtec.com | http://www.powervrinsider.com

  3. #3
    YEs:
    i need to draw some concave area with TRIANGLE_FAN...infact there is a problem while drawing this kind of area because there are triangles that not supposed to be there!... it's clear?

    thanx,
    Eym

  4. #4
    Senior Member
    Join Date
    May 2006
    Posts
    353
    While you can draw all convex polygons as TRIANGLE_FAN, that only works with some concave polygons. You need to triangulate the polygon: http://en.wikipedia.org/wiki/Polygon_triangulation .
    Georg Kolling, Imagination Technologies
    Please ask questions specific to PowerVR hardware or SDKs on the PowerVR Insider Forum
    DevTech@imgtec.com | http://www.powervrinsider.com

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