BlendTest.java

package com.metsci.glimpse.examples.basic;

import javax.media.opengl.GL;
import javax.media.opengl.GL2;

import com.metsci.glimpse.axis.Axis2D;
import com.metsci.glimpse.context.GlimpseBounds;
import com.metsci.glimpse.examples.Example;
import com.metsci.glimpse.painter.shape.LineSetPainter;
import com.metsci.glimpse.plot.Plot2D;
import com.metsci.glimpse.support.color.GlimpseColor;

public class BlendTest
{
    public static void main( String[] args ) throws Exception
    {
        Example example = Example.showWithSwing( new EmptyPlotExample( ) );
        
        LineSetPainter lp = new LineSetPainter( false )
        {
            @Override
            public void paintTo( GL2 gl, GlimpseBounds bounds, Axis2D axis )
            {
                gl.glBlendFunc( GL.GL_SRC_ALPHA, GL.GL_ONE );
                gl.glEnable( GL2.GL_BLEND );

                super.paintTo( gl, bounds, axis );
            }
        };
        lp.setData( new float[] { 0, 100, 500, 1000 }, new float[] { 0, 100, 0, 1000 } );
        
        lp.setLineColor( GlimpseColor.getWhite( 0.5f ) );
        
        // nothing appears with this blencFunc when using black
        //lp.setLineColor( GlimpseColor.getBlack( 0.5f ) );
        
        lp.setLineWidth( 5.0f );
        
        
        ( ( Plot2D ) example.getLayout( ) ).getLayoutCenter( ).addPainter( lp );
    }
}