Android Open Source - android-plotter Angle

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From Project

Back to project page android-plotter.

License

The source code is released under:

Apache License

Java Source Code

package org.solovyev.android.plotter;
//w  w w . j a  va  2  s .  co  m
import android.opengl.Matrix;
import android.os.Parcel;
import android.os.Parcelable;

import javax.annotation.Nonnull;

final class Angle implements Parcelable {

  @Nonnull
  public static final Creator<Angle> CREATOR = new Creator<Angle>() {
    public Angle createFromParcel(@Nonnull Parcel in) {
      return new Angle(in);
    }

    public Angle[] newArray(int size) {
      return new Angle[size];
    }
  };

  @Nonnull
  private final float[] rotation = new float[16];

  @Nonnull
  private final float[] tmp = new float[16];

  public float x;
  public float y;

  Angle() {
  }

  Angle(float x, float y) {
    this.x = x;
    this.y = y;
  }

  public Angle(@Nonnull Parcel in) {
    this.x = in.readFloat();
    this.y = in.readFloat();
  }

  public void add(@Nonnull Angle angle) {
    x += angle.x;
    y += angle.y;

    if (x >= 180) {
      x -= 360;
    }

    if (x < -180) {
      x += 360;
    }

    if (y >= 180) {
      y -= 360;
    }

    if (y < -180) {
      y += 360;
    }
  }

  @Nonnull
  public float[] getMatrix() {
    final float[] matrix = new float[16];
    rotateTo(matrix);
    return matrix;
  }

  public void rotateTo(@Nonnull float[] matrix) {
    Matrix.setIdentityM(matrix, 0);
    Matrix.rotateM(matrix, 0, x, 1, 0, 0);
    Matrix.rotateM(matrix, 0, y, 0, 1, 0);
  }

  public void rotateBy(@Nonnull float[] matrix) {
    Matrix.setIdentityM(rotation, 0);
    Matrix.rotateM(rotation, 0, x, 1, 0, 0);
    Matrix.rotateM(rotation, 0, y, 0, 1, 0);
    Matrix.multiplyMM(tmp, 0, rotation, 0, matrix, 0);
    System.arraycopy(tmp, 0, matrix, 0, 16);
  }

  @Override
  public int describeContents() {
    return 0;
  }

  @Override
  public void writeToParcel(@Nonnull Parcel out, int flags) {
    out.writeFloat(x);
    out.writeFloat(y);
  }

  public void apply(@Nonnull Angle from) {
    this.x = from.x;
    this.y = from.y;
  }
}

Java Source Code List

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