Java Vector3.add方法代码示例

import org.rajawali3d.math.vector.Vector3; //导入方法依赖的package包/类
private void p(Vector3 result, double t) {
	double u = 1 - t;
	double tt = t * t;
	double uu = u * u;
	double ttt = tt * t;
	double uuu = uu * u;

	result.scaleAndSet(mPoint1, uuu);

	mTempPoint.scaleAndSet(mControlPoint1, 3 * uu * t);
	result.add(mTempPoint);
	
	mTempPoint.scaleAndSet(mControlPoint2, 3 * u * tt);
	result.add(mTempPoint);
	
	mTempPoint.scaleAndSet(mPoint2, ttt);
	result.add(mTempPoint);
}
 

import org.rajawali3d.math.vector.Vector3; //导入方法依赖的package包/类
private void buildMeshes() {
	for (int i = 0; i < mNumMeshes; ++i) {
		int boneIndex = 0;
		SkeletonMeshData mesh = mMeshes[i];
		mesh.vertices = new float[mesh.numVertices * 3];
		mesh.indices = new int[mesh.numWeights];
		mesh.weights = new float[mesh.numWeights];
		mesh.textureCoordinates = new float[mesh.numVertices * 2];

		int numVerts = mesh.numVertices;

		for (int j = 0; j < numVerts; ++j) {
			BoneVertex vert = mesh.boneVertices[j];
			Vector3 position = new Vector3();

			for (int k = 0; k < vert.numWeights; ++k) {
				BoneWeight weight = mesh.boneWeights[vert.weightIndex + k];
				SkeletonJoint joint = mJoints[weight.jointIndex];

				Vector3 rotPos = joint.getOrientation().multiply(weight.position);
				//We don't clone here because nothing will be able to use the quaternion scratch before we do
				Vector3 pos = Vector3.addAndCreate(joint.getPosition(), rotPos);
				pos.multiply(weight.weightValue);
				position.add(pos);

				mesh.indices[boneIndex] = weight.jointIndex;
				mesh.weights[boneIndex++] = weight.weightValue;
			}

			int vertIndex = j * 3;
			mesh.vertices[vertIndex] = (float) position.x;
			mesh.vertices[vertIndex + 1] = (float) position.y;
			mesh.vertices[vertIndex + 2] = (float) position.z;

			int uvIndex = j * 2;
			mesh.textureCoordinates[uvIndex] = (float) vert.textureCoordinate.getX();
			mesh.textureCoordinates[uvIndex + 1] = (float) vert.textureCoordinate.getY();
		}
	}
}
 

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
protected void readFaces(InputStream buffer) throws IOException {
	int triangles = readShort(buffer);
	Vector3[] normals = new Vector3[triangles];
	ArrayList<Integer> indices = new ArrayList<Integer>();

	for (int i = 0; i < triangles; i++) {
		int[] vertexIDs = new int[3];
		vertexIDs[0] = readShort(buffer);
		vertexIDs[1] = readShort(buffer);
		vertexIDs[2] = readShort(buffer);
		readShort(buffer);

		indices.add(vertexIDs[0]);
		indices.add(vertexIDs[1]);
		indices.add(vertexIDs[2]);

		Vector3 normal = calculateFaceNormal(vertexIDs);
		normals[i] = normal;
	}

	mNormals.add(new Vector3[triangles]);
	mIndices.add(indices);

	int numVertices = mVertices.get(mObjects).size();
	int numIndices = indices.size();

	ArrayList<Vector3> vertNormals = new ArrayList<Vector3>();

	for (int i = 0; i < numVertices; i++) {

		Vector3 vertexNormal = new Vector3();

		for (int j = 0; j < numIndices; j += 3) {
			int id1 = indices.get(j);
			int id2 = indices.get(j + 1);
			int id3 = indices.get(j + 2);

			if (id1 == i || id2 == i || id3 == i) {
				vertexNormal.add(normals[j / 3]);
			}
		}
		vertexNormal.normalize();
		vertNormals.add(vertexNormal);
	}

	mVertNormals.add(vertNormals);
}