I have a problem in a portrayal's draw() method, sometimes the draw 

field from the DrawInfo2D object and the newinfo and info from 

SparseGridPortrayal2D looks like this for *some* calls in an update;



SparseGridPortrayal2D

newinfo: DrawInfo2D[ Draw: 

java.awt.geom.Rectangle2D$Double[x=352.0,y=107.0,w=0.0,h=0.0] Clip: 

java.awt.geom.Rectangle2D$Double[x=0.0,y=0.0,w=500.0,h=400.0]]

info: DrawInfo2D[ Draw: 

java.awt.geom.Rectangle2D$Double[x=0.0,y=0.0,w=500.0,h=400.0] Clip: 

java.awt.geom.Rectangle2D$Double[x=0.0,y=0.0,w=500.0,h=400.0]]

Our portrayal's draw(), info.draw: 

java.awt.geom.Rectangle2D$Double[x=352.0,y=107.0,w=0.0,h=0.0]



This is the code (more or less) where we set up the portrayal;

    public static void setupPortrayals(SimState state, Display2D display) {

        SparseGridPortrayal2D barterPortrayal = new SparseGridPortrayal2D();

        int width = display.getWidth();

        int height = display.getHeight();

        SparseGrid2D agentPositions = new SparseGrid2D(width, height);

      

        for(Agent e : agents) {

            agentPositions.setObjectLocation(e, Math.sin(idx) * idx, 

Math.cos(idx) * idx);

            idx++;

        }

        barterPortrayal.setField(agentPositions);

       

        display.attach(barterPortrayal, "Agents");

        barterPortrayal.setPortrayalForClass(

                Agent.class,

                new BasicAgentPortrayal((Simulation) state));



        display.reset();

        display.repaint();

    }



Regards,

  Pelle