Java Code Examples for com.jme3.bounding.BoundingBox#getXExtent()

public void updateBoindPoints(Vector3f[] points) {
    BoundingBox bb = (BoundingBox) batch.getWorldBound();
    float xe = bb.getXExtent();
    float ye = bb.getYExtent();
    float ze = bb.getZExtent();
    float x = bb.getCenter().x;
    float y = bb.getCenter().y;
    float z = bb.getCenter().z;

    points[0].set(new Vector3f(x - xe, y - ye, z - ze));
    points[1].set(new Vector3f(x - xe, y + ye, z - ze));
    points[2].set(new Vector3f(x + xe, y + ye, z - ze));
    points[3].set(new Vector3f(x + xe, y - ye, z - ze));

    points[4].set(new Vector3f(x + xe, y - ye, z + ze));
    points[5].set(new Vector3f(x - xe, y - ye, z + ze));
    points[6].set(new Vector3f(x - xe, y + ye, z + ze));
    points[7].set(new Vector3f(x + xe, y + ye, z + ze));
}
 

/**
 * used by attachBoundChildren()
 */
private void attachBoundingBox(BoundingBox bb, Node parent) {
    WireBox wb = new WireBox(bb.getXExtent(), bb.getYExtent(), bb.getZExtent());
    Geometry g = new Geometry();
    g.setMesh(wb);
    g.setLocalTranslation(bb.getCenter());
    parent.attachChild(g);
}
 

/**
 * Create a geometry suitable for visualizing the specified bounding box.
 *
 * @param bbox the bounding box (not null)
 * @return a new Geometry instance in world space
 */
public static Geometry makeGeometry(BoundingBox bbox) {
    float xExtent = bbox.getXExtent();
    float yExtent = bbox.getYExtent();
    float zExtent = bbox.getZExtent();
    WireBox mesh = new WireBox(xExtent, yExtent, zExtent);
    Geometry result = new Geometry("bounding box", mesh);

    Vector3f center = bbox.getCenter();
    result.setLocalTranslation(center);

    return result;
}
 

private static float calcScreenArea(BoundingBox bound, float distance, float screenWidth) {
    // Calc as if we are a BoundingSphere for now...
    float radiusSquare = bound.getXExtent() * bound.getXExtent()
                       + bound.getYExtent() * bound.getYExtent()
                       + bound.getZExtent() * bound.getZExtent();
    return ((radiusSquare * screenWidth * screenWidth) / (distance * distance * 4)) * FastMath.PI;
}
 

/**
 * used by attachBoundChildren()
 */
private void attachBoundingBox(BoundingBox bb, Node parent) {
    WireBox wb = new WireBox(bb.getXExtent(), bb.getYExtent(), bb.getZExtent());
    Geometry g = new Geometry();
    g.setMesh(wb);
    g.setLocalTranslation(bb.getCenter());
    parent.attachChild(g);
}
 

@Override
public BoundingVolume getBound() {
    BoundingBox bb = (BoundingBox)super.getBound();
    BoundingBox bb2 = new BoundingBox(bb.getCenter(), bb.getXExtent()*2, bb.getYExtent()*2,
            bb.getZExtent()*2);
    BoundingBox bb3 = new BoundingBox(bb.getCenter().ZERO,5,5,5);
    return bound;
}
 

private static void findChildBound(BoundingBox bbox, int side){
    float extent = bbox.getXExtent() * 0.5f;
    bbox.getCenter().set(bbox.getCenter().x + extent * Octnode.extentMult[side].x,
                         bbox.getCenter().y + extent * Octnode.extentMult[side].y,
                         bbox.getCenter().z + extent * Octnode.extentMult[side].z);
    bbox.setXExtent(extent);
    bbox.setYExtent(extent);
    bbox.setZExtent(extent);
}
 

/**
 * Flat projection for 2D textures.
 * 
 * @param mesh
 *            mesh that is to be projected
 * @param bb
 *            the bounding box for projecting
 * @return UV coordinates after the projection
 */
public static float[] flatProjection(float[] positions, BoundingBox bb) {
    Vector3f min = bb.getMin(null);
    float[] ext = new float[] { bb.getXExtent() * 2.0f, bb.getZExtent() * 2.0f };
    float[] uvCoordinates = new float[positions.length / 3 * 2];
    for (int i = 0, j = 0; i < positions.length; i += 3, j += 2) {
        uvCoordinates[j] = (positions[i] - min.x) / ext[0];
        // skip the Y-coordinate
        uvCoordinates[j + 1] = (positions[i + 2] - min.z) / ext[1];
    }
    return uvCoordinates;
}
 

/**
 * This method converts the given point into 3D UV coordinates.
 * 
 * @param boundingBox
 *            the bounding box of the mesh
 * @param point
 *            the point to be transformed
 * @param uvs
 *            the result UV coordinates
 */
private void toTextureUV(BoundingBox boundingBox, Vector3f point, float[] uvs) {
    uvs[0] = (point.x - boundingBox.getCenter().x) / (boundingBox.getXExtent() == 0 ? 1 : boundingBox.getXExtent());
    uvs[1] = (point.y - boundingBox.getCenter().y) / (boundingBox.getYExtent() == 0 ? 1 : boundingBox.getYExtent());
    uvs[2] = (point.z - boundingBox.getCenter().z) / (boundingBox.getZExtent() == 0 ? 1 : boundingBox.getZExtent());
    // UVS cannot go outside <0, 1> range, but since we are generating texture for triangle envelope it might happen that
    // some points of the envelope will exceet the bounding box of the mesh thus generating uvs outside the range
    for (int i = 0; i < 3; ++i) {
        uvs[i] = FastMath.clamp(uvs[i], 0, 1);
    }
}
 

private static float calcScreenArea(BoundingBox bound, float distance, float screenWidth) {
    // Calc as if we are a BoundingSphere for now...
    float radiusSquare = bound.getXExtent() * bound.getXExtent()
                       + bound.getYExtent() * bound.getYExtent()
                       + bound.getZExtent() * bound.getZExtent();
    return ((radiusSquare * screenWidth * screenWidth) / (distance * distance * 4)) * FastMath.PI;
}
 

public final int intersectWhere(Collidable col,
            BoundingBox box,
            Matrix4f worldMatrix,
            BIHTree tree,
            CollisionResults results) {

        TempVars vars = TempVars.get();
        ArrayList<BIHStackData> stack = vars.bihStack;
        stack.clear();

        float[] minExts = {box.getCenter().x - box.getXExtent(),
            box.getCenter().y - box.getYExtent(),
            box.getCenter().z - box.getZExtent()};

        float[] maxExts = {box.getCenter().x + box.getXExtent(),
            box.getCenter().y + box.getYExtent(),
            box.getCenter().z + box.getZExtent()};

        stack.add(new BIHStackData(this, 0, 0));

        Triangle t = new Triangle();
        int cols = 0;

        stackloop:
        while (stack.size() > 0) {
            BIHNode node = stack.remove(stack.size() - 1).node;

            while (node.axis != 3) {
                int a = node.axis;

                float maxExt = maxExts[a];
                float minExt = minExts[a];

                if (node.leftPlane < node.rightPlane) {
                    // means there's a gap in the middle
                    // if the box is in that gap, we stop there
                    if (minExt > node.leftPlane
                            && maxExt < node.rightPlane) {
                        continue stackloop;
                    }
                }

                if (maxExt < node.rightPlane) {
                    node = node.left;
                } else if (minExt > node.leftPlane) {
                    node = node.right;
                } else {
                    stack.add(new BIHStackData(node.right, 0, 0));
                    node = node.left;
                }
//                if (maxExt < node.leftPlane
//                 && maxExt < node.rightPlane){
//                    node = node.left;
//                }else if (minExt > node.leftPlane
//                       && minExt > node.rightPlane){
//                    node = node.right;
//                }else{

//                }
            }

            for (int i = node.leftIndex; i <= node.rightIndex; i++) {
                tree.getTriangle(i, t.get1(), t.get2(), t.get3());
                if (worldMatrix != null) {
                    worldMatrix.mult(t.get1(), t.get1());
                    worldMatrix.mult(t.get2(), t.get2());
                    worldMatrix.mult(t.get3(), t.get3());
                }

                int added = col.collideWith(t, results);

                if (added > 0) {
                    int index = tree.getTriangleIndex(i);
                    int start = results.size() - added;

                    for (int j = start; j < results.size(); j++) {
                        CollisionResult cr = results.getCollisionDirect(j);
                        cr.setTriangleIndex(index);
                    }

                    cols += added;
                }
            }
        }
        vars.release();
        return cols;
    }
 

/**
 * Cube projection for 2D textures.
 * 
 * @param positions
 *            points to be projected
 * @param bb
 *            the bounding box for projecting
 * @return UV coordinates after the projection
 */
public static float[] cubeProjection(float[] positions, BoundingBox bb) {
    Triangle triangle = new Triangle();
    Vector3f x = new Vector3f(1, 0, 0);
    Vector3f y = new Vector3f(0, 1, 0);
    Vector3f z = new Vector3f(0, 0, 1);
    Vector3f min = bb.getMin(null);
    float[] ext = new float[] { bb.getXExtent() * 2.0f, bb.getYExtent() * 2.0f, bb.getZExtent() * 2.0f };

    float[] uvCoordinates = new float[positions.length / 3 * 2];
    float borderAngle = (float) Math.sqrt(2.0f) / 2.0f;
    for (int i = 0, pointIndex = 0; i < positions.length; i += 9) {
        triangle.set(0, positions[i], positions[i + 1], positions[i + 2]);
        triangle.set(1, positions[i + 3], positions[i + 4], positions[i + 5]);
        triangle.set(2, positions[i + 6], positions[i + 7], positions[i + 8]);
        Vector3f n = triangle.getNormal();
        float dotNX = Math.abs(n.dot(x));
        float dorNY = Math.abs(n.dot(y));
        float dotNZ = Math.abs(n.dot(z));
        if (dotNX > borderAngle) {
            if (dotNZ < borderAngle) {// discard X-coordinate
                uvCoordinates[pointIndex++] = (triangle.get1().y - min.y) / ext[1];
                uvCoordinates[pointIndex++] = (triangle.get1().z - min.z) / ext[2];
                uvCoordinates[pointIndex++] = (triangle.get2().y - min.y) / ext[1];
                uvCoordinates[pointIndex++] = (triangle.get2().z - min.z) / ext[2];
                uvCoordinates[pointIndex++] = (triangle.get3().y - min.y) / ext[1];
                uvCoordinates[pointIndex++] = (triangle.get3().z - min.z) / ext[2];
            } else {// discard Z-coordinate
                uvCoordinates[pointIndex++] = (triangle.get1().x - min.x) / ext[0];
                uvCoordinates[pointIndex++] = (triangle.get1().y - min.y) / ext[1];
                uvCoordinates[pointIndex++] = (triangle.get2().x - min.x) / ext[0];
                uvCoordinates[pointIndex++] = (triangle.get2().y - min.y) / ext[1];
                uvCoordinates[pointIndex++] = (triangle.get3().x - min.x) / ext[0];
                uvCoordinates[pointIndex++] = (triangle.get3().y - min.y) / ext[1];
            }
        } else {
            if (dorNY > borderAngle) {// discard Y-coordinate
                uvCoordinates[pointIndex++] = (triangle.get1().x - min.x) / ext[0];
                uvCoordinates[pointIndex++] = (triangle.get1().z - min.z) / ext[2];
                uvCoordinates[pointIndex++] = (triangle.get2().x - min.x) / ext[0];
                uvCoordinates[pointIndex++] = (triangle.get2().z - min.z) / ext[2];
                uvCoordinates[pointIndex++] = (triangle.get3().x - min.x) / ext[0];
                uvCoordinates[pointIndex++] = (triangle.get3().z - min.z) / ext[2];
            } else {// discard Z-coordinate
                uvCoordinates[pointIndex++] = (triangle.get1().x - min.x) / ext[0];
                uvCoordinates[pointIndex++] = (triangle.get1().y - min.y) / ext[1];
                uvCoordinates[pointIndex++] = (triangle.get2().x - min.x) / ext[0];
                uvCoordinates[pointIndex++] = (triangle.get2().y - min.y) / ext[1];
                uvCoordinates[pointIndex++] = (triangle.get3().x - min.x) / ext[0];
                uvCoordinates[pointIndex++] = (triangle.get3().y - min.y) / ext[1];
            }
        }
        triangle.setNormal(null);// clear the previous normal vector
    }
    return uvCoordinates;
}
 

/**
 * Generates a UV coordinates for 3D texture.
 * 
 * @param mesh
 *            the mesh we generate UV's for
 * @param texco
 *            UV coordinates type
 * @param coordinatesSwappingIndexes
 *            coordinates swapping indexes
 * @param geometries
 *            the geometris the given mesh belongs to (required to compute
 *            bounding box)
 * @return UV coordinates for the given mesh
 */
public static List<Vector3f> generateUVCoordinatesFor3DTexture(Mesh mesh, UVCoordinatesType texco, int[] coordinatesSwappingIndexes, List<Geometry> geometries) {
    List<Vector3f> result = new ArrayList<Vector3f>();
    BoundingBox bb = UVCoordinatesGenerator.getBoundingBox(geometries);
    float[] inputData = null;// positions, normals, reflection vectors, etc.

    switch (texco) {
        case TEXCO_ORCO:
            inputData = BufferUtils.getFloatArray(mesh.getFloatBuffer(VertexBuffer.Type.Position));
            break;
        case TEXCO_UV:
            Vector2f[] data = new Vector2f[] { new Vector2f(0, 1), new Vector2f(0, 0), new Vector2f(1, 0) };
            for (int i = 0; i < mesh.getVertexCount(); ++i) {
                Vector2f uv = data[i % 3];
                result.add(new Vector3f(uv.x, uv.y, 0));
            }
            break;
        case TEXCO_NORM:
            inputData = BufferUtils.getFloatArray(mesh.getFloatBuffer(VertexBuffer.Type.Normal));
            break;
        case TEXCO_REFL:
        case TEXCO_GLOB:
        case TEXCO_TANGENT:
        case TEXCO_STRESS:
        case TEXCO_LAVECTOR:
        case TEXCO_OBJECT:
        case TEXCO_OSA:
        case TEXCO_PARTICLE_OR_STRAND:
        case TEXCO_SPEED:
        case TEXCO_STICKY:
        case TEXCO_VIEW:
        case TEXCO_WINDOW:
            LOGGER.warning("Texture coordinates type not currently supported: " + texco);
            break;
        default:
            throw new IllegalStateException("Unknown texture coordinates value: " + texco);
    }

    if (inputData != null) {// make calculations
        Vector3f min = bb.getMin(null);
        float[] uvCoordsResults = new float[4];// used for coordinates swapping
        float[] ext = new float[] { bb.getXExtent() * 2, bb.getYExtent() * 2, bb.getZExtent() * 2 };
        for (int i = 0; i < ext.length; ++i) {
            if (ext[i] == 0) {
                ext[i] = 1;
            }
        }
        // now transform the coordinates so that they are in the range of
        // <0; 1>
        for (int i = 0; i < inputData.length; i += 3) {
            uvCoordsResults[1] = (inputData[i] - min.x) / ext[0];
            uvCoordsResults[2] = (inputData[i + 1] - min.y) / ext[1];
            uvCoordsResults[3] = (inputData[i + 2] - min.z) / ext[2];
            result.add(new Vector3f(uvCoordsResults[coordinatesSwappingIndexes[0]], uvCoordsResults[coordinatesSwappingIndexes[1]], uvCoordsResults[coordinatesSwappingIndexes[2]]));
        }
    }
    return result;
}
 

/**
 * Constructor that creates an image element from the 3D texture
 * (generated texture). It computes a flat smallest rectangle that can
 * hold a (3D) triangle defined by the given UV coordinates. Then it
 * defines the image pixels for points in 3D space that define the
 * calculated rectangle.
 * 
 * @param faceIndex
 *            the face index this image refers to
 * @param boundingBox
 *            the bounding box of the mesh
 * @param texture
 *            the texture that allows to compute a pixel value in 3D
 *            space
 * @param uv
 *            the UV coordinates of the mesh
 * @param blenderContext
 *            the blender context
 */
public TriangleTextureElement(int faceIndex, BoundingBox boundingBox, GeneratedTexture texture, Vector3f[] uv, int[] uvIndices, BlenderContext blenderContext) {
    this.faceIndex = faceIndex;

    // compute the face vertices from the UV coordinates
    float width = boundingBox.getXExtent() * 2;
    float height = boundingBox.getYExtent() * 2;
    float depth = boundingBox.getZExtent() * 2;

    Vector3f min = boundingBox.getMin(null);
    Vector3f v1 = min.add(uv[uvIndices[0]].x * width, uv[uvIndices[0]].y * height, uv[uvIndices[0]].z * depth);
    Vector3f v2 = min.add(uv[uvIndices[1]].x * width, uv[uvIndices[1]].y * height, uv[uvIndices[1]].z * depth);
    Vector3f v3 = min.add(uv[uvIndices[2]].x * width, uv[uvIndices[2]].y * height, uv[uvIndices[2]].z * depth);

    // get the rectangle envelope for the triangle
    RectangleEnvelope envelope = this.getTriangleEnvelope(v1, v2, v3);

    // create the result image
    Format imageFormat = texture.getImage().getFormat();
    int imageWidth = (int) (envelope.width * blenderContext.getBlenderKey().getGeneratedTexturePPU());
    if (imageWidth == 0) {
        imageWidth = 1;
    }
    int imageHeight = (int) (envelope.height * blenderContext.getBlenderKey().getGeneratedTexturePPU());
    if (imageHeight == 0) {
        imageHeight = 1;
    }
    ByteBuffer data = BufferUtils.createByteBuffer(imageWidth * imageHeight * (imageFormat.getBitsPerPixel() >> 3));
    image = new Image(texture.getImage().getFormat(), imageWidth, imageHeight, data);

    // computing the pixels
    PixelInputOutput pixelWriter = PixelIOFactory.getPixelIO(imageFormat);
    TexturePixel pixel = new TexturePixel();
    float[] uvs = new float[3];
    Vector3f point = new Vector3f(envelope.min);
    Vector3f vecY = new Vector3f();
    Vector3f wDelta = new Vector3f(envelope.w).multLocal(1.0f / imageWidth);
    Vector3f hDelta = new Vector3f(envelope.h).multLocal(1.0f / imageHeight);
    for (int x = 0; x < imageWidth; ++x) {
        for (int y = 0; y < imageHeight; ++y) {
            this.toTextureUV(boundingBox, point, uvs);
            texture.getPixel(pixel, uvs[0], uvs[1], uvs[2]);
            pixelWriter.write(image, 0, pixel, x, y);
            point.addLocal(hDelta);
        }

        vecY.addLocal(wDelta);
        point.set(envelope.min).addLocal(vecY);
    }

    // preparing UV coordinates for the flatted texture
    this.uv = new Vector2f[3];
    this.uv[0] = new Vector2f(FastMath.clamp(v1.subtract(envelope.min).length(), 0, Float.MAX_VALUE) / envelope.height, 0);
    Vector3f heightDropPoint = v2.subtract(envelope.w);// w is directed from the base to v2
    this.uv[1] = new Vector2f(1, heightDropPoint.subtractLocal(envelope.min).length() / envelope.height);
    this.uv[2] = new Vector2f(0, 1);
}
 

public final int intersectWhere(Collidable col,
            BoundingBox box,
            Matrix4f worldMatrix,
            BIHTree tree,
            CollisionResults results) {

        TempVars vars = TempVars.get();
        ArrayList<BIHStackData> stack = vars.bihStack;
        stack.clear();

        float[] minExts = {box.getCenter().x - box.getXExtent(),
            box.getCenter().y - box.getYExtent(),
            box.getCenter().z - box.getZExtent()};

        float[] maxExts = {box.getCenter().x + box.getXExtent(),
            box.getCenter().y + box.getYExtent(),
            box.getCenter().z + box.getZExtent()};

        stack.add(new BIHStackData(this, 0, 0));

        Triangle t = new Triangle();
        int cols = 0;

        stackloop:
        while (stack.size() > 0) {
            BIHNode node = stack.remove(stack.size() - 1).node;

            while (node.axis != 3) {
                int a = node.axis;

                float maxExt = maxExts[a];
                float minExt = minExts[a];

                if (node.leftPlane < node.rightPlane) {
                    // means there's a gap in the middle
                    // if the box is in that gap, we stop there
                    if (minExt > node.leftPlane
                            && maxExt < node.rightPlane) {
                        continue stackloop;
                    }
                }

                if (maxExt < node.rightPlane) {
                    node = node.left;
                } else if (minExt > node.leftPlane) {
                    node = node.right;
                } else {
                    stack.add(new BIHStackData(node.right, 0, 0));
                    node = node.left;
                }
//                if (maxExt < node.leftPlane
//                 && maxExt < node.rightPlane){
//                    node = node.left;
//                }else if (minExt > node.leftPlane
//                       && minExt > node.rightPlane){
//                    node = node.right;
//                }else{

//                }
            }

            for (int i = node.leftIndex; i <= node.rightIndex; i++) {
                tree.getTriangle(i, t.get1(), t.get2(), t.get3());
                if (worldMatrix != null) {
                    worldMatrix.mult(t.get1(), t.get1());
                    worldMatrix.mult(t.get2(), t.get2());
                    worldMatrix.mult(t.get3(), t.get3());
                }

                int added = col.collideWith(t, results);

                if (added > 0) {
                    int index = tree.getTriangleIndex(i);
                    int start = results.size() - added;

                    for (int j = start; j < results.size(); j++) {
                        CollisionResult cr = results.getCollisionDirect(j);
                        cr.setTriangleIndex(index);
                    }

                    cols += added;
                }
            }
        }
        vars.release();
        return cols;
    }