meerkat Posted February 10, 2006 Share Posted February 10, 2006 how can i render curves with renderman? I can render them as polygons fine but is it possible to render nurbs? thanks amir Quote Link to comment Share on other sites More sharing options...
Mario Marengo Posted February 10, 2006 Share Posted February 10, 2006 how can i render curves with renderman? I can render them as polygons fine but is it possible to render nurbs?thanks amir 24588[/snapback] Hi Amir, In the "Specific" tab of the renderman ROP, you can set "RiCurve Interpolation" to "cubic" (default is "linear"). You'll need your curves to have at least 4 points. Also these are not NURBs but cubic splines (I don't think ther's ever been support for NURB RiCurves). Cheers! Quote Link to comment Share on other sites More sharing options...
TheUsualAlex Posted February 10, 2006 Share Posted February 10, 2006 Hallo, Houdini 8.0.225: Added new support for RenderMan RiCurve primitives. There are now three new detail attributes that can be set to control the output of open polys to RenderMan: "ri_curveinterpolation", "ri_curvebasis" and "ri_curvestep". "ri_curveinterpolation" should be set to either "linear" or "cubic". "ri_curvebasis" can be set to any standard RenderMan basis or a custom basis matrix. When "ri_curvestep" is omitted, the value in "ri_curvebasis" is used to determine the correct step size if possible. The RiCurve Basis parameter (renamed RiCurve Interpolation) in the RenderMan ROP is obsolete and may be removed from future versions. The environment variables HOUDINI_RMAN_CURVE_STEP and HOUDINI_RMAN_CURVE_BASIS are also obsolete and may be removed from future versions. HTH, Alex Quote Link to comment Share on other sites More sharing options...
George Posted February 11, 2006 Share Posted February 11, 2006 Ah! Thanks for reminding me Alex. I made an HDA for this a while back intending to post it to the exchange whenever I got a chance to clean it up. Well I never got around to cleaning it up But it's up there now: http://www.sidefx.com/exchange/download.ph...id=272&type=OTL Take care, George. Quote Link to comment Share on other sites More sharing options...
meerkat Posted February 11, 2006 Author Share Posted February 11, 2006 thanks for the help Quote Link to comment Share on other sites More sharing options...
meerkat Posted April 5, 2006 Author Share Posted April 5, 2006 how do i scale a curve so that it is thinner at the tip and wider at the root? Quote Link to comment Share on other sites More sharing options...
michael Posted April 5, 2006 Share Posted April 5, 2006 use a 'width' attribute http://www.sidefx.com/index.php?option=com...highlight=width Quote Link to comment Share on other sites More sharing options...
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