Android Open Source - Cardboard Vector3d

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Back to project page Cardboard.

License

The source code is released under:

Apache License

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Java Source Code

package com.google.vrtoolkit.cardboard.sensors.internal;
/* w w  w . j a  va 2s  .com*/
public class Vector3d {
  public double x;
  public double y;
  public double z;

  public Vector3d() {
  }

  public Vector3d(double xx, double yy, double zz) {
    set(xx, yy, zz);
  }

  public void set(double xx, double yy, double zz) {
    this.x = xx;
    this.y = yy;
    this.z = zz;
  }

  public void setComponent(int i, double val) {
    if (i == 0) {
      this.x = val;
    } else if (i == 1) {
      this.y = val;
    } else {
      this.z = val;
    }
  }

  public void setZero() {
    this.x = (this.y = this.z = 0.0D);
  }

  public void set(Vector3d other) {
    this.x = other.x;
    this.y = other.y;
    this.z = other.z;
  }

  public void scale(double s) {
    this.x *= s;
    this.y *= s;
    this.z *= s;
  }

  public void normalize() {
    double d = length();
    if (d != 0.0D) {
      scale(1.0D / d);
    }
  }

  public static double dot(Vector3d a, Vector3d b) {
    return a.x * b.x + a.y * b.y + a.z * b.z;
  }

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

  public boolean sameValues(Vector3d other) {
    return (this.x == other.x) && (this.y == other.y)
        && (this.z == other.z);
  }

  public static void sub(Vector3d a, Vector3d b, Vector3d result) {
    result.set(a.x - b.x, a.y - b.y, a.z - b.z);
  }

  public static void cross(Vector3d a, Vector3d b, Vector3d result) {
    result.set(a.y * b.z - a.z * b.y, a.z * b.x - a.x * b.z, a.x * b.y
        - a.y * b.x);
  }

  public static void ortho(Vector3d v, Vector3d result) {
    int k = largestAbsComponent(v) - 1;
    if (k < 0) {
      k = 2;
    }
    result.setZero();
    result.setComponent(k, 1.0D);

    cross(v, result, result);
    result.normalize();
  }

  public static int largestAbsComponent(Vector3d v) {
    double xAbs = Math.abs(v.x);
    double yAbs = Math.abs(v.y);
    double zAbs = Math.abs(v.z);
    if (xAbs > yAbs) {
      if (xAbs > zAbs) {
        return 0;
      }
      return 2;
    }
    if (yAbs > zAbs) {
      return 1;
    }
    return 2;
  }
}

Java Source Code List