maxPolysVisible ceiling in software render mode

[stormp]

Hi,

When in software render mode is there a ceiling limit to the number of visible polygons?  I've noticed in some examples maxPolysVisible is set to 10000 even 64000.

I get this error message intermittently:

Code Select Expand

WARNING: You've exceeded the configured triangle limit for the visibility list. Consider adjusting Config.maxPolysVisible!

I've set mine to         

Code Select Expand

Config.maxPolysVisible = 20000;

I'm never seeing any more than 3800 polygons in a scene

Code Select Expand

theWorld.getVisibilityList().getSize();

I really only have about 350 five faced cylinders randomly plotted in the world and a couple of planes. So there isn't really that many polygons to display in a scene.  Why would I be getting this error?

Also, what is a reasonable visible polygone count in a scene in software mode?  (I know this is a vague question, but just looking for some sort of guidelines or references).

Thanks for any help :-)

S.

[EgonOlsen]

I find it very unlikely that this happens. It's a simple check on the arrays size. Do you have a test case that shows this behaviour?
BTW: Software and hardware mode are behaving the same in this regard (until now...), so it's not related to software only.

[stormp]

Do you have a test case that shows this behaviour?

Hi Egon,
Thanks for the quick reply.  I don't always get the message. Just intermittently.  I'll try to find out more about what conditions are that generates the notice message and post an example w/ code.

Any comments about what is a reasonable number of polys in a scene?

Cheers,

S.

[EgonOlsen]

Thanks for the quick reply.  I don't always get the message. Just intermittently.  I'll try to find out more about what conditions are that generates the notice message and post an example w/ code.

Are you by any chance doing multiple calls to renderScene() without calling draw() in between?

Any comments about what is a reasonable number of polys in a scene?

This highly depends on the scene. Number of polygons in the scene/2+10% should be a reasonable upper bound if the whole scene can be visible. But again: It depends on the scene...

[stormp]

Are you by any chance doing multiple calls to renderScene() without calling draw() in between?

Nope, but I am calling Draw twice in some situations.  I want a wire frame around my landscape.  Haven't figured out how to wire frame just one object yet.
Could this have anything to do with it?

Thanks.

Code Select Expand


        while(!exit)
        {
            poll();                                 // Poll keybaord.

            frameBuffer.clear(Color.black);         // Clear frame- and z-buffer and make white background.

            //
            // Render the scene. Rotations and movement is done inpendently in the timer thread.
            //
            theWorld.renderScene(frameBuffer);      // Do all the stuff except the scanline conversion


            //
            //  Draw wireframe.
            //
            if(modeLand != 2)
            {
                theWorld.drawWireframe(frameBuffer, Color.gray);        // frame buffer
            }  // if

            theWorld.draw(frameBuffer);             // Do the scanline conversion (into buffer)

            frameBuffer.update();                   // Postprocess the framebuffer (if needed) and copy back- to
                                                    // frontbuffer

            //
            // This is just performance counter code:
            //
            cntFrames++;

            cntPoly += theWorld.getVisibilityList().getSize();

            endTime = System.currentTimeMillis();

            if(endTime-startTime > 1000)
            {
                renderTime = (cntFrames-lastFrames);
                lastFrames = cntFrames;
                startTime  = endTime;
                rendPoly   = cntPoly;
                cntPoly    = 0;
            }  // if
           
            frameBuffer.display(this.getGraphics());  // NOTE: do this instead of below
            myUpdate(this.getGraphics());             // calls  myUpdate()-method, where the rendered frame will
                                                      // be displayed

            Thread.yield();                           // Give other threads the possibility to do something
        }  // while

[EgonOlsen]

Could this have anything to do with it?

No, that's fine. Are you actually instantiating the World after setting the Config-value?

[stormp]

Are you actually instantiating the World after setting the Config-value?

No, should i be? 

Code Select Expand


    public void init()
    {
        getAppletContext().showStatus("Initializing...");


        //
        // Setup applet graphics.
        //
        resize(500,350);

        frameBuffer = new FrameBuffer(500, 350, FrameBuffer.SAMPLINGMODE_NORMAL);
       
       
        //
        // Initialize 3D World.
        //
        theWorld     = new World();                     // Genisis the 3D world.
        texManager   = TextureManager.getInstance();    // Easy access to the Texture Manager.
        theCamera    = theWorld.getCamera();            // Easy access to default Camera.
        dumCamera    = new Camera();                    // Dummy camera.

        //
        // Input devices.
        //
        componentOwner = this;
        keyMapper      = new KeyMapper(componentOwner);
       

        //
        // TODO: Load textures here...
        //
        Texture  tex = new Texture(getCodeBase(), "data/grass.jpg");
        texManager.addTexture("grass", tex);

        //
        // Start creating our world.
        //
        Config.tuneForOutdoor();  // Use the default settings for outdoor scenes.
        Config.maxPolysVisible    = 65000;
        Config.farPlane           = 3000;
        Config.fadeoutLight       = false;
        Config.useMultipleThreads = true;
       
        createLand();


[EgonOlsen]

Yes. 

[stormp]

Yes. 

I suppose that makes sense now.  Thanks Egon