245 lines
7.2 KiB
Java
245 lines
7.2 KiB
Java
package io.github.bi0qaw.biosphere.util;
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import org.bukkit.Location;
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import org.bukkit.util.Vector;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Random;
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public class VectorLib {
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public static final double SQRT2 = Math.sqrt(2);
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public static Vector[] getLine(double length, double density) {
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int points = (int) (length * density) + 1;
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double delta = length / (double) points;
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Vector[] vectors = new Vector[points];
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for (int i = 0; i < points; i++) {
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vectors[i] = new Vector(i*delta, 0, 0);
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}
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return vectors;
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}
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public static Vector[] getLine(Vector vector1, Vector vector2, double density) {
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double length = vector1.distance(vector2);
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int points = (int) (length * density) + 1;
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Vector delta = vector2.clone().subtract(vector1).multiply(1.0 / (double) points);
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Vector[] vectors = new Vector[points];
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for (int i=0; i < points; i++) {
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vectors[i] = delta.clone().multiply(i).add(vector1);
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}
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return vectors;
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}
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public static Vector[] linkLine(Vector v1, Vector v2, double density) {
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int points = (int) (v1.distance(v2) * density) + 1;
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Vector delta = v2.clone().subtract(v1).multiply(1D / (double) points);
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Vector[] vectors = new Vector[points];
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vectors[0] = v1.clone();
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for (int i=1; i<points; i++) {
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vectors[i] = delta.clone().multiply(i).add(v1);
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}
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return vectors;
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}
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public static Vector[] getCircle(double radius, double density) {
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int n = (int) (radius * 2 * Math.PI * density);
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return getPolygon(n, radius);
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}
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public static Vector[] getPolygon(int points, double radius) {
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float deltaAngle = 360 / (float) points;
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Vector[] vectors = new Vector[points];
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for (int i = 0; i < points; i++) {
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vectors[i] = VectorMath.fromCylindricalCoordinates(radius, i * deltaAngle, 0);
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}
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return vectors;
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}
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public static Vector[] getPolygonOutline(int points, double radius, double density) {
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Vector[] polygon = getPolygon(points, radius);
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List<Vector> vectors = new ArrayList<Vector>();
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for (int i=0; i < points - 1; i++) {
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vectors.addAll(Arrays.asList(linkLine(polygon[i], polygon[i+1], density)));
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}
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vectors.addAll(Arrays.asList(linkLine(polygon[polygon.length - 1], polygon[0], density)));
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return vectors.toArray(new Vector[vectors.size()]);
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}
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public static Vector[] getCube(double radius) {
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Vector[] vectors = new Vector[8];
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double d = radius / SQRT2;
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vectors[0] = new Vector(-d, -d, -d);
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vectors[1] = new Vector(-d, -d, d);
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vectors[2] = new Vector(-d, d, -d);
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vectors[3] = new Vector(-d, d, d);
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vectors[4] = new Vector(d, -d, -d);
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vectors[5] = new Vector(d, -d, d);
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vectors[6] = new Vector(d, d, -d);
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vectors[7] = new Vector(d, d, d);
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return vectors;
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}
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public static Vector[] getCubeOutline(double radius, double density) {
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double off = radius/SQRT2;
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int points = (int) (radius * density) + 1;
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double d = 2*off/points;
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Vector[] vectors = new Vector[points * 12];
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for (int i=0; i < points; i++) {
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vectors[i + 0*points] = new Vector(i*d-off, -off, -off);
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vectors[i + 1*points] = new Vector(i*d-off, off, -off);
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vectors[i + 2*points] = new Vector(i*d-off, -off, off);
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vectors[i + 3*points] = new Vector(i*d-off, off, off);
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vectors[i + 4*points] = new Vector(-off, i*d-off, -off);
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vectors[i + 5*points] = new Vector(off, i*d-off, -off);
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vectors[i + 6*points] = new Vector(-off, i*d-off, off);
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vectors[i + 7*points] = new Vector(off, i*d-off, off);
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vectors[i + 8*points] = new Vector(-off, -off, i*d-off);
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vectors[i + 9*points] = new Vector(off, -off, i*d-off);
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vectors[i + 10*points] = new Vector(-off, off, i*d-off);
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vectors[i + 11*points] = new Vector(off, off, i*d-off);
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}
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return vectors;
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}
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public static Vector[] getHelix(double radius, double height, double step, double density) {
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int points = (int) ( height * 2 * Math.PI * radius * density);
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double deltaAngle = 360 * height / (step * points);
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double deltaHeight = height / points;
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Vector[] vectors = new Vector[points];
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for(int i=0; i < points; i++){
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vectors[i] = VectorMath.fromCylindricalCoordinates(radius, deltaAngle * i, deltaHeight * i);
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}
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return vectors;
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}
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public static Vector[] linkAll(Vector[] vectors, double density) {
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List<Vector> vecs = new ArrayList<Vector>();
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for (Vector v1 : vectors) {
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for (Vector v2 : vectors) {
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if (!v1.equals(v2)) {
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vecs.addAll(Arrays.asList(linkLine(v1, v2, density)));
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}
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}
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}
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return vecs.toArray(new Vector[vecs.size()]);
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}
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public static Vector midpoint(Vector[] vectors) {
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Vector midpoint = new Vector();
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double factor = 1D/vectors.length;
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for (Vector vec: vectors) {
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VectorMath.addMul(midpoint, vec, factor);
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}
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return midpoint;
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}
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public static Vector[] offset(Vector[] vectors, Vector offset) {
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for (Vector v: vectors) {
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v.add(offset);
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}
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return vectors;
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}
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public static Vector[] pointReflection(Vector[] vectors, Vector center) {
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for (Vector v: vectors) {
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v.subtract(center).multiply(-1).add(center);
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}
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return vectors;
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}
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public static Vector[] reflection(Vector[] vectors, Vector center, Vector direction) {
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for(Vector v: vectors){
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v.subtract(center).multiply(-1).multiply(direction).add(center);
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}
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return vectors;
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}
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public static Vector[] rotate(Vector[] vectors, Vector axis, double angle) {
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for (Vector v: vectors) {
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v = VectorMath.rot(v, axis, angle);
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}
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return vectors;
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}
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public static Vector[] rotateX(Vector[] vectors, double angle) {
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for (Vector v: vectors) {
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v = VectorMath.rotX(v, angle);
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}
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return vectors;
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}
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public static Vector[] rotateY(Vector[] vectors, double angle) {
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for (Vector v: vectors) {
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v = VectorMath.rotY(v, angle);
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}
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return vectors;
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}
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public static Vector[] rotateZ(Vector[] vectors, double angle) {
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for (Vector v: vectors) {
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v = VectorMath.rotZ(v, angle);
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}
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return vectors;
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}
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public static Vector[] scale(Vector[] vectors, double factor) {
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for (Vector v: vectors) {
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v.multiply(factor);
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}
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return vectors;
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}
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public static Vector[] scaleDirectional(Vector[] vectors, Vector direction, double factor) {
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for (Vector v: vectors) {
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v.multiply(direction);
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v.multiply(factor);
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}
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return vectors;
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}
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public static Vector[] getSphere(double radius, double density){
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int points = (int) (Math.PI * radius * density);
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Vector[] vectors = new Vector[points * points];
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double deltaYaw = 360D / points;
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double deltaPitch = 180D / points;
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double yaw = 0;
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double pitch = 0;
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for (int i=0; i<points; i++) {
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for (int j=0; j<points; j++) {
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vectors[j+i*points] = VectorMath.fromSphericalCoordinates(radius, yaw, pitch);
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pitch += deltaPitch;
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}
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yaw += deltaYaw;
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pitch = 0;
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}
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return vectors;
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}
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public static Vector[] getRandomSphere(double radius, double density) {
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int points = (int) (Math.PI * radius * density);
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Vector[] vectors = new Vector[points * points];
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Random rand = new Random();
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double yaw, pitch;
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for (int i=0; i < points * points; i++) {
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yaw = rand.nextDouble() * 360;
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pitch = rand.nextDouble() * 180;
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vectors[i] = VectorMath.fromSphericalCoordinates(radius, yaw, pitch);
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}
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return vectors;
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}
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public static Vector[] toVector(Location[] locations) {
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Vector[] vectors = new Vector[locations.length];
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int i = 0;
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for (Location l: locations) {
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vectors[i] = l.toVector();
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i++;
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}
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return vectors;
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}
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}
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