[JAVA3D] (Interpolating) color depending of the y-value

[B. Hofmann]

Hi,

I´m having a TriangleStripArray polygon an I want to fill it with different
colors. The colors should be correlated with the y-values an interpolated
between different y-values (in my programm the y-values of the
VirtualUniverse are named as the z-values, confusing but necessary!).

I read the manuals and tried nearly everything but I didn´t have any
success. I´ve tried to configure with ColoringAttributes, Material,
PolygonAttributes and other classes. You can see my whole createAppearance
method in the attachment.

The complete classes and source are also attached. You can start the project
with:

java -jar Matrix3dplot.jar

The VisualObject-class is Plot.java. The Appearance (in Plot.java) method
begins in line 173 and ends in line 208

Thanks for any hints and tipps,

Bernd

Matrix3dplot.jar

Matrix3dplot.java

Plot.java

Appearance createTriangleAppearance()

{
        Appearance app = new Appearance();
        ColoringAttributes c_att = new ColoringAttributes(0.2f, 0.1f, 0.8f, 
ColoringAttributes.SHADE_GOURAUD);
        //c_att.setColor(new Color3f(0.0f, 1.0f, 0.0f));
        app.setColoringAttributes(c_att);

        ///////////////////////////////////////////////////////////////////////////////
        // Material

        Material mat = new Material(new Color3f(0.0f, 0.0f, 0.0f), // ambientColor - 
the material's ambient color
                                    new Color3f(0.0f, 0.8f, 0.0f), // emissiveColor - 
the material's emissive color
                                    new Color3f(0.0f, 1.0f, 0.4f), // diffuseColor - 
the material's diffuse color when illuminated by a light
                                    new Color3f(1.0f, 1.0f, 0.0f), // specularColor - 
the material's specular color when illuminated to generate a highlight
                                    128.0f) ; // shininess - the material's shininess 
in the range [1.0, 128.0] with 1.0 being not shiny and 128.0 being very shiny. Values 
outside this range are clamped.
        app.setMaterial(mat);

        // Material End
        
////////////////////////////////////////////////////////////////////////////////


        
////////////////////////////////////////////////////////////////////////////////
        // Polygon attributes
        PolygonAttributes TrianglePolygonAttrib = new PolygonAttributes(
                  PolygonAttributes.POLYGON_FILL, //polygonMode - polygon 
rasterization mode; one of POLYGON_POINT, POLYGON_LINE, or POLYGON_FILL
                  PolygonAttributes.CULL_NONE, // Integer cullFace - polygon culling 
mode; one of CULL_NONE, CULL_BACK, or CULL_FRONT
                  100f, // polygonOffset - constant polygon offset
                  false, // backFaceNormalFlip - back face normal flip flag; true or 
false
                  100f); // polygonOffset - polygon offset factor for slope-based 
polygon offset
        app.setPolygonAttributes(TrianglePolygonAttrib);
        //Polygon attributes end
        
////////////////////////////////////////////////////////////////////////////////


 return app;
}