Java Vector3.subtractAndCreate方法代码示例

import org.rajawali3d.math.vector.Vector3; //导入方法依赖的package包/类
/**
 * Intersects a ray defined by a start and end point and a {@link Plane}.
 * @param rayStart Startpoint of the ray
 * @param rayEnd Endpoint of the ray
 * @param plane The plane
 * @param hitPoint The intersection point (optional)
 * @return True if there is an intersection, false otherwise.
 */
public static boolean intersectRayPlane(Vector3 rayStart, Vector3 rayEnd, Plane plane, Vector3 hitPoint) {
	Vector3 rayDir = Vector3.subtractAndCreate(rayEnd, rayStart);
	double denorm = rayDir.dot(plane.getNormal());
	if (denorm != 0) {
		double t = -(rayStart.dot(plane.getNormal()) + plane.getD()) / denorm;
		if (t < 0) return false;
		
		if (hitPoint != null) hitPoint.addAndSet(rayStart, Vector3.scaleAndCreate(rayDir, t));
		return true;
	} else if (plane.getPointSide(rayStart) == Plane.PlaneSide.ONPLANE) {
		if (hitPoint != null) hitPoint.setAll(rayStart);
		return true;
	} else {
		return false;
	}
}
 

import org.rajawali3d.math.vector.Vector3; //导入方法依赖的package包/类
/**
 * Constructs a {@link ArchimedeanSpiral3D} with the specified parameters.
 *
 * @param density  {@code double} Factor which determines how tightly the spiral is curled.
 * @param start    {@link Vector3} The point where the spiral should start from.
 * @param normal   {@link Vector3} The normal vector of the plane the spiral is in. This is assumed to be
 *                 orthogonal to the vector formed from the start to the origin.
 * @param spiralIn {@code boolean} True if the spiral should move from the staring point in. False to move from starting point out.
 */
public ASpiral3D(double density, Vector3 start, Vector3 normal, boolean spiralIn) {
    // Store the provided initial conditions
    mSpiralIn = spiralIn;
    mDensity = density;
    mStart = Vector3.subtractAndCreate(start, Vector3.ZERO);
    mUp = normal.clone();

    // Calculate the remaining conditions
    mCalculateTangents = false;

    // Create the initial tangent vector
    mCurrentTangent = Vector3.crossAndCreate(mStart, mUp);
    // The initial rotation is 0 radians about the up axis
    mRotation = new Quaternion(mUp, 0);
}
 

import org.rajawali3d.math.vector.Vector3; //导入方法依赖的package包/类
private Matrix4 createLightViewProjectionMatrix(DirectionalLight light) {
	//
	// -- Get the frustum corners in world space
	//
	mCamera.getFrustumCorners(mFrustumCorners, true);
	//
	// -- Get the frustum centroid
	//
	mFrustumCentroid.setAll(0, 0, 0);
	for(int i=0; i<8; i++)
		mFrustumCentroid.add(mFrustumCorners[i]);
	mFrustumCentroid.divide(8.0);
	
	//
	// -- 
	//
	
	BoundingBox lightBox = new BoundingBox(mFrustumCorners);
	double distance = mFrustumCentroid.distanceTo(lightBox.getMin());
	Vector3 lightDirection = light.getDirectionVector().clone();
	lightDirection.normalize();
	Vector3 lightPosition = Vector3.subtractAndCreate(mFrustumCentroid, Vector3.multiplyAndCreate(lightDirection, distance));
          
	//
	// -- 
	//
	
	mLightViewMatrix.setToLookAt(lightPosition, mFrustumCentroid, Vector3.Y);
	
	for(int i=0; i<8; i++)
		mFrustumCorners[i].multiply(mLightViewMatrix);
          
          BoundingBox b = new BoundingBox(mFrustumCorners);
          mLightProjectionMatrix.setToOrthographic(b.getMin().x, b.getMax().x, b.getMin().y, b.getMax().y, -b.getMax().z, -b.getMin().z);

          mLightModelViewProjectionMatrix.setAll(mLightProjectionMatrix);
          mLightModelViewProjectionMatrix.multiply(mLightViewMatrix);
	return mLightModelViewProjectionMatrix;
}
 

import org.rajawali3d.math.vector.Vector3; //导入方法依赖的package包/类
@Override
protected void applyTransformation() {
	if (mDiffPosition == null)
		mDiffPosition = Vector3.subtractAndCreate(mToPosition, mFromPosition);

	mMultipliedPosition.scaleAndSet(mDiffPosition, mInterpolatedTime);
	mAddedPosition.addAndSet(mFromPosition, mMultipliedPosition);
	mTransformable3D.setPosition(mAddedPosition);
}
 

import org.rajawali3d.math.vector.Vector3; //导入方法依赖的package包/类
@Override
protected void applyTransformation() {
	if (mDiffScale == null)
		mDiffScale = Vector3.subtractAndCreate(mToScale, mFromScale);

	mMultipliedScale.scaleAndSet(mDiffScale, mInterpolatedTime);
	mAddedScale.addAndSet(mFromScale, mMultipliedScale);
	mTransformable3D.setScale(mAddedScale);
}
 

import org.rajawali3d.math.vector.Vector3; //导入方法依赖的package包/类
private Vector3 calculateFaceNormal(int[] vertexIDs) {
	ArrayList<Vector3> vertices = mVertices.get(mObjects);
	Vector3 v1 = vertices.get(vertexIDs[0]);
	Vector3 v2 = vertices.get(vertexIDs[2]);
	Vector3 v3 = vertices.get(vertexIDs[1]);

	Vector3 vector1 = Vector3.subtractAndCreate(v2, v1);
	Vector3 vector2 = Vector3.subtractAndCreate(v3, v1);

	Vector3 normal = Vector3.crossAndCreate(vector1, vector2);
	normal.normalize();
	return normal;
}
 

import org.rajawali3d.math.vector.Vector3; //导入方法依赖的package包/类
/**
 * Calculates the side lengths that child nodes
 * of this node should have.
 */
protected void calculateChildSideLengths() {
	//Determine the distance on each axis
	Vector3 temp = Vector3.subtractAndCreate(mTransformedMax, mTransformedMin);
	temp.multiply(0.5f); //Divide it in half
	float overlap = 1.0f + mOverlap/100.0f;
	temp.multiply(overlap);
	temp.absoluteValue();
	mChildLengths.setAll(temp);
}
 

import org.rajawali3d.math.vector.Vector3; //导入方法依赖的package包/类
/**
 * Intersects a ray defined by a start and end point and a triangle.
 * @param rayStart Startpoint of the ray
 * @param rayEnd Endpoint of the ray
 * @param t1 The first vertex of the triangle
 * @param t2 The second vertex of the triangle
 * @param t3 The third vertex of the triangle
 * @param hitPoint The intersection point (optional)
 * @return True if there is an intersection, false otherwise.
 */
public static boolean intersectRayTriangle(Vector3 rayStart, Vector3 rayEnd, Vector3 t1, Vector3 t2, Vector3 t3, Vector3 hitPoint) {
	Vector3 rayDir = Vector3.subtractAndCreate(rayEnd, rayStart);
	rayDir.normalize();
	p.set(t1, t2, t3);
	if (!intersectRayPlane(rayStart, rayEnd, p, i)) return false;
	
	v0.subtractAndSet(t3, t1);
	v1.subtractAndSet(t2, t1);
	v2.subtractAndSet(i, t1);
	
	double dot00 = v0.dot(v0);
	double dot01 = v0.dot(v1);
	double dot02 = v0.dot(v2);
	double dot11 = v1.dot(v1);
	double dot12 = v1.dot(v2);
	
	double denom = dot00 * dot11 - dot01 * dot01;
	if (denom == 0) return false;
	
	double u = (dot11 * dot02 - dot01 * dot12) / denom;
	double v = (dot00 * dot12 - dot01 * dot02) / denom;
	
	if (u >= 0 && v >= 0 && u + v <= 1) {
		if (hitPoint != null) hitPoint.setAll(i);
		return true;
	} else
		return false;
}
 

import org.rajawali3d.math.vector.Vector3; //导入方法依赖的package包/类
private Matrix4 createLightViewProjectionMatrix(DirectionalLight light) {
	//
	// -- Get the frustum corners in world space
	//
	mCamera.getFrustumCorners(mFrustumCorners, true);
	//
	// -- Get the frustum centroid
	//
	mFrustumCentroid.setAll(0, 0, 0);
	for(int i=0; i<8; i++)
		mFrustumCentroid.add(mFrustumCorners[i]);
	mFrustumCentroid.divide(8.0);

	//
	// --
	//

	BoundingBox lightBox = new BoundingBox(mFrustumCorners);
	double distance = mFrustumCentroid.distanceTo(lightBox.getMin());
	Vector3 lightDirection = light.getDirectionVector().clone();
	lightDirection.normalize();
	Vector3 lightPosition = Vector3.subtractAndCreate(mFrustumCentroid, Vector3.multiplyAndCreate(lightDirection, distance));

	//
	// --
	//

	mLightViewMatrix.setToLookAt(lightPosition, mFrustumCentroid, Vector3.Y);

	for(int i=0; i<8; i++)
		mFrustumCorners[i].multiply(mLightViewMatrix);

          BoundingBox b = new BoundingBox(mFrustumCorners);
          mLightProjectionMatrix.setToOrthographic(b.getMin().x, b.getMax().x, b.getMin().y, b.getMax().y, -b.getMax().z, -b.getMin().z);

          mLightModelViewProjectionMatrix.setAll(mLightProjectionMatrix);
          mLightModelViewProjectionMatrix.multiply(mLightViewMatrix);
	return mLightModelViewProjectionMatrix;
}
 

import org.rajawali3d.math.vector.Vector3; //导入方法依赖的package包/类
public float[] calculateNormals(int[] indices) {
	float[] vertices = new float[mGeometry.getVertices().capacity()];
	mGeometry.getVertices().get(vertices).position(0);
	float[] faceNormals = new float[indices.length];
	float[] vertNormals = new float[vertices.length];

	int numIndices = indices.length;
	int numVertices = vertices.length;
	int id1, id2, id3, vid1, vid2, vid3;
	Vector3 v1 = new Vector3();
	Vector3 v2 = new Vector3();
	Vector3 v3 = new Vector3();
	Vector3 normal = new Vector3();
	
	// -- calculate face normals
	for(int i=0; i<numIndices; i+=3) {
		id1 = indices[i];
		id2 = indices[i+1];
		id3 = indices[i+2];
		
		vid1 = id1 * 3;
		vid2 = id2 * 3;
		vid3 = id3 * 3;
		
		v1.setAll(vertices[vid1], vertices[vid1+1], vertices[vid1+2]);
		v2.setAll(vertices[vid2], vertices[vid2+1], vertices[vid2+2]);
		v3.setAll(vertices[vid3], vertices[vid3+1], vertices[vid3+2]);
		
		Vector3 vector1 = Vector3.subtractAndCreate(v2, v1);
           Vector3 vector2 = Vector3.subtractAndCreate(v3, v1);
           
           normal = Vector3.crossAndCreate(vector1, vector2);
           normal.normalize();
           
           faceNormals[i] = (float) normal.x;
           faceNormals[i+1] = (float) normal.y;
           faceNormals[i+2] = (float) normal.z;

	}
	// -- calculate vertex normals
	
	Vector3 vertexNormal = new Vector3();
	
	for(int i=0; i<numVertices; i+=3) {
		int vIndex = i / 3;
		
		vertexNormal.setAll(0, 0, 0);			
		
		for(int j=0; j<numIndices; j+=3)
		{
			id1 = indices[j];
			id2 = indices[j+1];
			id3 = indices[j+2];
			
			if(id1 == vIndex || id2 == vIndex || id3 == vIndex) {
				vertexNormal.add(faceNormals[j], faceNormals[j+1], faceNormals[j+2]);
			}
		}
		vertexNormal.normalize();
		vertNormals[i] = (float) vertexNormal.x;
		vertNormals[i+1] = (float) vertexNormal.y;
		vertNormals[i+2] = (float) vertexNormal.z;
	}
	//mGeometry.setNormals(vertNormals);
	faceNormals = null;
	v1 = null;
	v2 = null;
	v3 = null;
	return vertNormals;
}
 

import org.rajawali3d.math.vector.Vector3; //导入方法依赖的package包/类
/**
 * Grows the tree.
 */
protected void grow() {
	RajLog.d("[" + this.getClass().getName() + "] Growing tree: " + this);
	Vector3 min = new Vector3(Float.MAX_VALUE, Float.MAX_VALUE, Float.MAX_VALUE);
	Vector3 max = new Vector3(-Float.MAX_VALUE, -Float.MAX_VALUE, -Float.MAX_VALUE);
	//Get a full list of all the members, including members in the children
	ArrayList<IGraphNodeMember> members = getAllMembersRecursively(true);
	int members_count = members.size();
	for (int i = 0; i < members_count; ++i) {
		IBoundingVolume volume = members.get(i).getTransformedBoundingVolume();
		Vector3 test_against_min = null;
		Vector3 test_against_max = null;
		if (volume == null) {
			ATransformable3D object = (ATransformable3D) members.get(i);
			test_against_min = object.getPosition();
			test_against_max = test_against_min;
		} else {
			if (volume instanceof BoundingBox) {
				BoundingBox bb = (BoundingBox) volume;
				test_against_min = bb.getTransformedMin();
				test_against_max = bb.getTransformedMax();
			} else if (volume instanceof BoundingSphere) {
				BoundingSphere bs = (BoundingSphere) volume;
				Vector3 bs_position = bs.getPosition();
				double radius = bs.getScaledRadius();
				Vector3 rad = new Vector3();
				rad.setAll(radius, radius, radius);
				test_against_min = Vector3.subtractAndCreate(bs_position, rad);
				test_against_max = Vector3.addAndCreate(bs_position, rad);
			} else {
				RajLog.e("[" + this.getClass().getName() + "] Received a bounding box of unknown type.");
				throw new IllegalArgumentException("Received a bounding box of unknown type."); 
			}
		}
		if (test_against_min != null && test_against_max != null) {
			if(test_against_min.x < min.x) min.x = test_against_min.x;
			if(test_against_min.y < min.y) min.y = test_against_min.y;
			if(test_against_min.z < min.z) min.z = test_against_min.z;
			if(test_against_max.x > max.x) max.x = test_against_max.x;
			if(test_against_max.y > max.y) max.y = test_against_max.y;
			if(test_against_max.z > max.z) max.z = test_against_max.z;
		}
	}
	mMin.setAll(min);
	mMax.setAll(max);
	mTransformedMin.setAll(min);
	mTransformedMax.setAll(max);
	calculatePoints();
	calculateChildSideLengths();
	if (mSplit) {
		for (int i = 0; i < CHILD_COUNT; ++i) {
			((Octree) mChildren[i]).setChildRegion(i, mChildLengths);
		}
	}
	for (int i = 0; i < members_count; ++i) {
		internalAddObject(members.get(i));
	}
}