Java Camera.lookAt方法代码示例

import com.jme3.renderer.Camera; //导入方法依赖的package包/类
/**
 * 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);
}
 

import com.jme3.renderer.Camera; //导入方法依赖的package包/类
public Texture setupOffscreenView(){
    Camera offCamera = new Camera(512, 512);

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

    // create offscreen framebuffer
    FrameBuffer offBuffer = new FrameBuffer(512, 512, 1);

    //setup framebuffer's cam
    offCamera.setFrustumPerspective(45f, 1f, 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(512, 512, Format.RGBA8);
    offTex.setMinFilter(Texture.MinFilter.Trilinear);
    offTex.setMagFilter(Texture.MagFilter.Bilinear);

    //setup framebuffer to use texture
    offBuffer.setDepthBuffer(Format.Depth);
    offBuffer.setColorTexture(offTex);
    
    //set viewport to render to offscreen framebuffer
    offView.setOutputFrameBuffer(offBuffer);

    // setup framebuffer's scene
    Box boxMesh = new Box(Vector3f.ZERO, 1,1,1);
    Material material = assetManager.loadMaterial("Interface/Logo/Logo.j3m");
    offBox = new Geometry("box", boxMesh);
    offBox.setMaterial(material);

    // attach the scene to the viewport to be rendered
    offView.attachScene(offBox);
    
    return offTex;
}
 

import com.jme3.renderer.Camera; //导入方法依赖的package包/类
public void setupOffscreenView(){
        offCamera = new Camera(width, height);

        // create a pre-view. a view that is rendered before the main view
        offView = renderManager.createPreView("Offscreen View", offCamera);
        offView.setBackgroundColor(ColorRGBA.DarkGray);
        offView.setClearFlags(true, true, true);
        
        // this will let us know when the scene has been rendered to the 
        // frame buffer
        offView.addProcessor(this);

        // create offscreen framebuffer
        offBuffer = new FrameBuffer(width, height, 1);

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

        //setup framebuffer's texture
//        offTex = new Texture2D(width, height, Format.RGBA8);

        //setup framebuffer to use renderbuffer
        // this is faster for gpu -> cpu copies
        offBuffer.setDepthBuffer(Format.Depth);
        offBuffer.setColorBuffer(Format.RGBA8);
//        offBuffer.setColorTexture(offTex);
        
        //set viewport to render to offscreen framebuffer
        offView.setOutputFrameBuffer(offBuffer);

        // setup framebuffer's scene
        Box boxMesh = new Box(Vector3f.ZERO, 1,1,1);
        Material material = assetManager.loadMaterial("Interface/Logo/Logo.j3m");
        offBox = new Geometry("box", boxMesh);
        offBox.setMaterial(material);

        // attach the scene to the viewport to be rendered
        offView.attachScene(offBox);
    }