Now that's interesting.  Is the problem just that you're seeing 0 width 
and 0 height, or that this triggers something which freaks out?

In any case, could you create a stack trace when this occurs?

Sean

Pelle Evensen wrote:
> 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