Android Open Source - jmini3d Vector3

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License

The source code is released under:

Copyright 2012 Mobialia http://www.mobialia.com/ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to ...

Java Source Code

package jmini3d;
/*from   w ww . j a va2s  .com*/
public class Vector3 {
  public float x;
  public float y;
  public float z;

  private static Vector3 tmp = new Vector3();

  public Vector3() {
    x = 0;
    y = 0;
    z = 0;
  }

  public Vector3(float x, float y, float z) {
    this.x = x;
    this.y = y;
    this.z = z;
  }

  public void setAll(float x, float y, float z) {
    this.x = x;
    this.y = y;
    this.z = z;
  }

  public void setAllFrom(Vector3 n) {
    x = n.x;
    y = n.y;
    z = n.z;
  }

  public void normalize() {
    float mod = (float) Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);

    if (mod != 0 && mod != 1) {
      mod = 1 / mod;
      this.x *= mod;
      this.y *= mod;
      this.z *= mod;
    }
  }

  public void add(Vector3 n) {
    this.x += n.x;
    this.y += n.y;
    this.z += n.z;
  }

  public void subtract(Vector3 n) {
    this.x -= n.x;
    this.y -= n.y;
    this.z -= n.z;
  }

  public void multiply(float f) {
    this.x *= f;
    this.y *= f;
    this.z *= f;
  }

  public float length() {
    return (float) Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);
  }

  public Vector3 clone() {
    return new Vector3(x, y, z);
  }

  public void rotateX(float angle) {
    float cosRY = (float) Math.cos(angle);
    float sinRY = (float) Math.sin(angle);

    tmp.setAll(this.x, this.y, this.z);

    this.y = (tmp.y * cosRY) - (tmp.z * sinRY);
    this.z = (tmp.y * sinRY) + (tmp.z * cosRY);
  }

  public void rotateY(float angle) {
    float cosRY = (float) Math.cos(angle);
    float sinRY = (float) Math.sin(angle);

    tmp.setAll(this.x, this.y, this.z);

    this.x = (tmp.x * cosRY) + (tmp.z * sinRY);
    this.z = (tmp.x * -sinRY) + (tmp.z * cosRY);
  }

  public void rotateZ(float angle) {
    float cosRY = (float) Math.cos(angle);
    float sinRY = (float) Math.sin(angle);

    tmp.setAll(this.x, this.y, this.z);

    this.x = (tmp.x * cosRY) - (tmp.y * sinRY);
    this.y = (tmp.x * sinRY) + (tmp.y * cosRY);
  }

  public void rotateAxis(Vector3 a, float angle) {
    float c = (float) Math.cos(angle);
    float s = (float) Math.sin(angle);
    float t = 1 - (float) Math.cos(angle);

    float nx = x * (t * a.x * a.x + c) + y * (t * a.x * a.y - s * a.z) + z * (t * a.x * a.z + s * a.y);
    float ny = x * (t * a.x * a.y + s * a.z) + y * (t * a.y * a.y + c) + z * (t * a.y * a.z - s * a.x);
    float nz = x * (t * a.x * a.z - s * a.y) + y * (t * a.y * a.z + s * a.x) + z * (t * a.z * a.z + c);

    x = nx;
    y = ny;
    z = nz;
  }

  public static Vector3 add(Vector3 a, Vector3 b) {
    return new Vector3(a.x + b.x, a.y + b.y, a.z + b.z);
  }

  public static Vector3 subtract(Vector3 a, Vector3 b) {
    return new Vector3(a.x - b.x, a.y - b.y, a.z - b.z);
  }

  public static Vector3 multiply(Vector3 a, Vector3 b) {
    return new Vector3(a.x * b.x, a.y * b.y, a.z * b.z);
  }

  public static Vector3 cross(Vector3 v, Vector3 w) {
    return new Vector3((w.y * v.z) - (w.z * v.y), (w.z * v.x) - (w.x * v.z), (w.x * v.y) - (w.y * v.x));
  }

  public static void cross(Vector3 result, Vector3 v, Vector3 w) {
    result.setAll((w.y * v.z) - (w.z * v.y), (w.z * v.x) - (w.x * v.z), (w.x * v.y) - (w.y * v.x));
  }

  public static float dot(Vector3 v, Vector3 w) {
    return (v.x * w.x + v.y * w.y + w.z * v.z);
  }

  @Override
  public boolean equals(Object o) {
    if (o == null) {
      return false;
    }
    if (!(o instanceof Vector3)) {
      return false;
    }
    return x == (((Vector3) o).x) && (y == ((Vector3) o).y) && (z == ((Vector3) o).z);
  }

  @Override
  public String toString() {
    return x + "," + y + "," + z;
  }
}

Java Source Code List

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