Re: How to Draw a Smooth Curve through a Set of 2D Points
Posted by Xerxes Rånby on Feb 27, 2017; 2:08pm URL: https://forum.jogamp.org/How-to-Draw-a-Smooth-Curve-through-a-Set-of-2D-Points-tp4037677p4037680.html
I assume you are using Tomas Hrasky's example code from 2007 contributed when he was a student at the University of Hradec Králové in the Czech Republic. Thomas example code is found in:
The jogl-demos git have unfortunally not been updated to reflect the latest changes to jogl
I am using jogl-fat.jar
But it gives error com.jogamp.opengl.util.GLUT
the class you are looking for have been move and is now found here:
import com.jogamp.opengl.util.gl2.GLUT
Also there is no such method glu.gluNewNurbsRenderer() in glu
Use the class
import com.jogamp.opengl.glu.gl2.GLUgl2
it contain the function gluNewNurbsRenderer()
If you update jogl-demos to use the above class imports please return a patch so that we can update jogl-demos to match the latest JogAmp JOGL release.
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Inside the main JOGL source tree we also have the "graph" API that is what we consider the *best* way to render nurbs on all GPU's using a patent free shaders implementation.
Graph is suitable for both desktop and mobile GPU processors.
In a nutshell the JogAmp Graph API enable you to define nurbs shapes
Outline → OutlineShapes → GLRegion
and then render the shapes using a Renderer
RegionRenderer
TextRenderer (same as RegionRender with Helper methods for texts and fonts.)
outline.addVertex(x, y, z, w, onCurve);
outlineShape.addOutline(outline);
region = GLRegion.create(outlineShape, getRenderModes());
region.render(gl, outlineShape,...);
The graph API is using the math by Rami Santina introduced in 2011