Examples of com.jme3.renderer.Camera

com.jme3.renderer.Camera
Camera is a standalone, purely mathematical class for doing camera-related computations.
Given input data such as location, orientation (direction, left, up), and viewport settings, it can compute data necessary to render objects with the graphics library. Two matrices are generated, the view matrix transforms objects from world space into eye space, while the projection matrix transforms objects from eye space into clip space.

Another purpose of the camera class is to do frustum culling operations, defined by six planes which define a 3D frustum shape, it is possible to test if an object bounded by a mathematically defined volume is inside the camera frustum, and thus to avoid rendering objects that are outside the frustum
@author Mark Powell @author Joshua Slack

    this.enqueue(new Callable<Integer>(){


      public Integer call() throws Exception {
        if (bloomFilter == null) {
          bloomFilter = new FilterPostProcessor(assetManager);
          BloomFilter bf = new BloomFilter(BloomFilter.GlowMode.Objects);
          bf.setBloomIntensity(2.0f);
          bf.setExposurePower(1.3f);
          bloomFilter.addFilter(bf);
          @SuppressWarnings("unused")
          BloomUI bui = new BloomUI(inputManager, bf);
        }
        viewPort.addProcessor(bloomFilter);

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        renderer = context.getRenderer();
        
        // init Camera --------------------------------
        
        cam = new Camera(settings.getWidth(), settings.getHeight());


        cam.setFrustumPerspective(45f, (float)cam.getWidth() / cam.getHeight(), 1f, 1000f);
        cam.setLocation(new Vector3f(0f, 0f, 10f));
        cam.lookAt(new Vector3f(0f, 0f, 0f), Vector3f.UNIT_Y);
        


        renderManager = new RenderManager(renderer);
        //Remy - 09/14/2010 setted the timer in the renderManager
        renderManager.setTimer(timer);
        viewPort = renderManager.createMainView("Default", cam);
        viewPort.setClearEnabled(true);


        // Create a new cam for the gui
        Camera guiCam = new Camera(settings.getWidth(), settings.getHeight());
        guiViewPort = renderManager.createPostView("Gui Default", guiCam);
        guiViewPort.setClearEnabled(false);
        
        // init Input ----------------------------------

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      RenderToBubble app = new RenderToBubble();
        app.start();
    }


    public Texture setupOffscreenView(){
        Camera offCamera = new Camera(1024, 256);


        offView = renderManager.createPreView("Offscreen View!", offCamera);
        offView.setClearFlags(true, true, true);
        offView.setBackgroundColor(ColorRGBA.DarkGray);


        // create offscreen framebuffer
        FrameBuffer offBuffer = new FrameBuffer(1024, 256, 1);


        //setup framebuffer's cam
        offCamera.setFrustumPerspective(45f, 4f, 1f, 1000f);
        offCamera.setLocation(new Vector3f(0f, 0f, -5f));
        offCamera.lookAt(new Vector3f(0f, 0f, 0f), Vector3f.UNIT_Y);


        //setup framebuffer's texture
        Texture2D offTex = new Texture2D(1024, 256, Format.RGBA8);
        offTex.setMinFilter(Texture.MinFilter.Trilinear);
        offTex.setMagFilter(Texture.MagFilter.Bilinear);

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            if (!value) {
                return;
            }


            if (name.equals(INPUT_MAPPING_CAMERA_POS)) {
                Camera cam = app.getCamera();
                if (cam != null) {
                    Vector3f loc = cam.getLocation();
                    Quaternion rot = cam.getRotation();
                    System.out.println("Camera Position: ("
                            + loc.x + ", " + loc.y + ", " + loc.z + ")");
                    System.out.println("Camera Rotation: " + rot);
                    System.out.println("Camera Direction: " + cam.getDirection());
                    System.out.println("cam.setLocation(new Vector3f("
                            + loc.x + "f, " + loc.y + "f, " + loc.z + "f));");
                    System.out.println("cam.setRotation(new Quaternion(" + rot.getX() + "f, " +rot.getY()+ "f, " + rot.getZ() + "f, " + rot.getW() + "f));");
                  
                }

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     * Creates the camera to use for rendering. Default values are perspective
     * projection with 45° field of view, with near and far values 1 and 1000
     * units respectively.
     */
    private void initCamera(){
        cam = new Camera(settings.getWidth(), settings.getHeight());


        cam.setFrustumPerspective(45f, (float)cam.getWidth() / cam.getHeight(), 1f, 1000f);
        cam.setLocation(new Vector3f(0f, 0f, 10f));
        cam.lookAt(new Vector3f(0f, 0f, 0f), Vector3f.UNIT_Y);


        renderManager = new RenderManager(renderer);
        //Remy - 09/14/2010 setted the timer in the renderManager
        renderManager.setTimer(timer);
        viewPort = renderManager.createMainView("Default", cam);
        viewPort.setClearFlags(true, true, true);


        // Create a new cam for the gui
        Camera guiCam = new Camera(settings.getWidth(), settings.getHeight());
        guiViewPort = renderManager.createPostView("Gui Default", guiCam);
        guiViewPort.setClearFlags(false, false, false);
    }

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    }


    protected void controlRender(RenderManager rm, ViewPort vp) {
        BoundingVolume bv = spatial.getWorldBound();


        Camera cam = vp.getCamera();
        float atanNH = FastMath.atan(cam.getFrustumNear() * cam.getFrustumTop());
        float ratio = (FastMath.PI / (8f * atanNH));
        float newDistance = bv.distanceTo(vp.getCamera().getLocation()) / ratio;
        int level;


        if (Math.abs(newDistance - lastDistance) <= distTolerance) {
            level = lastLevel; // we haven't moved relative to the model, send the old measurement back.
        } else if (lastDistance > newDistance && lastLevel == 0) {
            level = lastLevel; // we're already at the lowest setting and we just got closer to the model, no need to keep trying.
        } else if (lastDistance < newDistance && lastLevel == numLevels - 1) {
            level = lastLevel; // we're already at the highest setting and we just got further from the model, no need to keep trying.
        } else {
            lastDistance = newDistance;


            // estimate area of polygon via bounding volume
            float area = AreaUtils.calcScreenArea(bv, lastDistance, cam.getWidth());
            float trisToDraw = area * trisPerPixel;
            level = numLevels - 1;
            for (int i = numLevels; --i >= 0;) {
                if (trisToDraw - numTris[i] < 0) {
                    break;

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    public void postFrame(FrameBuffer out) {
        if (capture){
            capture = false;


            Camera curCamera = rm.getCurrentCamera();
            int viewX = (int) (curCamera.getViewPortLeft() * curCamera.getWidth());
            int viewY = (int) (curCamera.getViewPortBottom() * curCamera.getHeight());
            int viewWidth = (int) ((curCamera.getViewPortRight() - curCamera.getViewPortLeft()) * curCamera.getWidth());
            int viewHeight = (int) ((curCamera.getViewPortTop() - curCamera.getViewPortBottom()) * curCamera.getHeight());


            renderer.setViewPort(0, 0, width, height);
            renderer.readFrameBuffer(out, outBuf);
            renderer.setViewPort(viewX, viewY, viewWidth, viewHeight);

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    protected void controlUpdate(float tpf) {
    }


    @Override
    protected void controlRender(RenderManager rm, ViewPort vp) {
        Camera cam = vp.getCamera();
        rotateBillboard(cam);
    }

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        setCompareMode(CompareMode.Hardware);
        setFilterMode(FilterMode.Bilinear);
        setShadowIntensity(0.7f);


        shadowCam = new Camera(size, size);
        shadowCam.setParallelProjection(true);


        for (int i = 0; i < points.length; i++) {
            points[i] = new Vector3f();
        }

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        GeometryList receivers = rq.getShadowQueueContent(ShadowMode.Receive);
        if (receivers.size() == 0) {
            return;
        }


        Camera viewCam = viewPort.getCamera();


        float zFar = zFarOverride;
        if (zFar == 0) {
            zFar = viewCam.getFrustumFar();
        }


        //We prevent computing the frustum points and splits with zeroed or negative near clip value
        float frustumNear = Math.max(viewCam.getFrustumNear(), 0.001f);
        ShadowUtil.updateFrustumPoints(viewCam, frustumNear, zFar, 1.0f, points);


        //shadowCam.setDirection(direction);
        shadowCam.getRotation().lookAt(direction, shadowCam.getUp());
        shadowCam.update();

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com.jme3.shadow.PssmShadowRenderer

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