Change Gaussian Curvature Coloration Scheme

[oleland-br]

Is there a way to change the palette for the GC curvature labeling?

[Nicolas Chiaruttini]

Yes, it's all in the script:

https://github.com/NicoKiaru/LimeSeg/blob/master/src/main/resources/script-templates/LimeSeg/DisplayCurvature3D.groovy

Does this script make sense to you ? Are you a bit familiar with java code ?

This class:

LimeSeg/src/main/resources/script-templates/LimeSeg/DisplayCurvature3D.groovy

Lines 28 to 46 in 45a654b

 public class GaussianCurvatureColorLUT extends DotNColorSupplier { 
  
 	float emphasize;  
 	 
 	public GaussianCurvatureColorLUT(float emphasize) { 
 		this.emphasize  = emphasize;		 
 	} 
  
 	public float[] getColor(DotN dn) { 
 		float curvature=(float) dn.gaussianCurvature; 
 		if (curvature>0f) { 
         	return [0.5f,(float)(0.5f*(1+(Math.atan(emphasize*curvature)*2/Math.PI))),0.5f,1f] as float[]; 
 		} 
 		if (curvature<0f) { 
         	return [(float)(0.5f*(1+(Math.atan(-emphasize*curvature)*2/Math.PI))),0.5f,0.5f,1f] as float[]; 
         } 
     } 
 	 
 } 

sets the color of each vertex (DotN) object depending on its gaussian curvature. You can see how the color (rgb) is set depending on the gaussian curvature property of the DotN object:

LimeSeg/src/main/resources/script-templates/LimeSeg/DisplayCurvature3D.groovy

Lines 36 to 43 in 45a654b

 public float[] getColor(DotN dn) { 
 	float curvature=(float) dn.gaussianCurvature; 
 	if (curvature>0f) { 
        	return [0.5f,(float)(0.5f*(1+(Math.atan(emphasize*curvature)*2/Math.PI))),0.5f,1f] as float[]; 
 	} 
 	if (curvature<0f) { 
        	return [(float)(0.5f*(1+(Math.atan(-emphasize*curvature)*2/Math.PI))),0.5f,0.5f,1f] as float[]; 
        } 

this method returns a [red, green, blue, alpha] array (affecting the green or red component if the curvature is >0 or <0)

You can play a bit with these lines and see how the color is changing. You need to enable this "shader" by uncommenting the line 13 of this script and commenting the line 14

[oleland-br]

Sorry for the delayed response. I'm less familiar with java so this was helpful. Thank you!