Example usage for javax.media.j3d BoundingBox BoundingBox

Introduction

In this page you can find the example usage for javax.media.j3d BoundingBox BoundingBox.

Prototype

public BoundingBox() 

Source Link

Document

Constructs and initializes a 2X bounding box about the origin.

Usage

From source file:ExDepthCue.java

public Group buildScene() {
    // Get the current color
    Color3f color = (Color3f) colors[currentColor].value;

    // Turn off the example headlight
    setHeadlightEnable(false);//from  w w w  .ja  v  a  2s  .  co m

    // Create the scene group
    Group scene = new Group();

    // Create a switch group to hold the fog node. This enables
    // us to turn the fog node on and off via the GUI.
    fogSwitch = new Switch();
    fogSwitch.setCapability(Switch.ALLOW_SWITCH_WRITE);

    // Create influencing bounds
    Bounds worldBounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), // Center
            1000.0); // Extent

    // Set the fog color, density, and its influencing bounds
    fog = new LinearFog();
    fog.setColor(color);
    // front and back distances set below
    fog.setCapability(Fog.ALLOW_COLOR_WRITE);
    fog.setCapability(Fog.ALLOW_INFLUENCING_BOUNDS_WRITE);
    fog.setInfluencingBounds(worldBounds);
    fogSwitch.addChild(fog);
    scene.addChild(fogSwitch);
    if (depthCueOnOff)
        fogSwitch.setWhichChild(0); // on
    else
        fogSwitch.setWhichChild(Switch.CHILD_NONE); // off

    // Set the background color and its application bounds
    //   Usually, the background color should match the fog color
    //   or the results look odd.
    background = new Background();
    background.setColor(color);
    background.setApplicationBounds(worldBounds);
    background.setCapability(Background.ALLOW_COLOR_WRITE);
    scene.addChild(background);

    // Build foreground geometry
    Group content = buildIsoline();
    scene.addChild(content);

    // Automatically compute good front and back distances for
    // fog to get good depth-cueing. To do this, first get the
    // dimensions of the bounds around the content. Then,
    // set the front distance to be at the center of the content
    // (or closer by a tad) and the back distance at the front
    // distance PLUS half the depth of the content's bounding box
    BoundingSphere sampleSphere = new BoundingSphere();
    BoundingBox sampleBox = new BoundingBox();
    Bounds bounds = content.getBounds();
    double deltaDistance = 0.0;
    double centerZ = 0.0;

    if (bounds == null) {
        // No bounds available. Estimate the values knowing
        // that the above content is what it is.
        centerZ = 0.5; // 0.5 closer than true center
        deltaDistance = 2.0;
    } else if (bounds.getClass() == sampleSphere.getClass()) {
        BoundingSphere sphereBounds = (BoundingSphere) bounds;
        deltaDistance = Math.abs(sphereBounds.getRadius());
        Point3d center = new Point3d();
        sphereBounds.getCenter(center);
        centerZ = center.z + 0.5; // 0.5 closer than true center
    } else if (bounds.getClass() == sampleBox.getClass()) {
        BoundingBox boxBounds = (BoundingBox) bounds;
        Point3d p1 = new Point3d();
        Point3d p2 = new Point3d();
        boxBounds.getLower(p1);
        boxBounds.getUpper(p2);
        deltaDistance = p2.z - p1.z;
        if (deltaDistance < 0.0)
            deltaDistance *= -1.0;
        if (p1.z > p2.z)
            centerZ = p1.z - deltaDistance / 2.0;
        else
            centerZ = p2.z - deltaDistance / 2.0;
        centerZ += 0.5; // 0.5 closer than true center
    } else {
        System.err.println("Unknown bounds type");
    }

    // Set front distance to the distance from the default
    // viewing position (0,0,10) to the center of the bounds.
    fog.setFrontDistance(10.0f - (float) centerZ);

    // Set back distance to the distance from the default
    // viewing position (0,0,10) to the back of the bounds.
    fog.setBackDistance(10.0f - (float) centerZ + (float) deltaDistance);

    return scene;
}

---

From source file:BehaviorTest.java

public ObjectSizeBehavior(GeometryArray geomArray) {
    // save the GeometryArray that we are modifying
    m_GeometryArray = geomArray;/*from w ww .  j av a  2s.  com*/

    // set the capability bits that the behavior requires
    m_GeometryArray.setCapability(GeometryArray.ALLOW_COORDINATE_READ);
    m_GeometryArray.setCapability(GeometryArray.ALLOW_COUNT_READ);

    // allocate an array for the coordinates
    m_CoordinateArray = new float[3 * m_GeometryArray.getVertexCount()];

    // create the BoundingBox used to
    // calculate the size of the object
    m_BoundingBox = new BoundingBox();

    // create a temporary point
    m_Point = new Point3d();

    // create the WakeupCriterion for the behavior
    WakeupCriterion criterionArray[] = new WakeupCriterion[1];
    criterionArray[0] = new WakeupOnElapsedFrames(20);

    // save the WakeupCriterion for the behavior
    m_WakeupCondition = new WakeupOr(criterionArray);
}

---