Android Open Source - android-plotter Frustum

• Back to Graphics/graph  ↑

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;
/*from   ww w  .  j a  va  2 s  .co  m*/
import javax.annotation.Nonnull;

public final class Frustum {
  public float width;
  public float height;
  public float near;
  public float far;
  public float distance;
  public float aspectRatio;

  private Frustum(float distance, float aspectRatio) {
    update(distance, aspectRatio);
  }

  boolean update(float distance, float aspectRatio) {
    if (this.distance != distance || this.aspectRatio != aspectRatio) {
      this.distance = distance;
      this.aspectRatio = aspectRatio;
      this.near = distance / 3f;
      this.far = distance * 3f;
      this.width = 2 * near / 5f;
      this.height = width * aspectRatio;
      return true;
    }

    return false;
  }

  @Nonnull
  static Frustum create(float distance, float aspectRatio) {
    return new Frustum(distance, aspectRatio);
  }

  @Nonnull
  static Frustum empty() {
    return new Frustum(0, 1);
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;

    Frustum frustum = (Frustum) o;

    if (Float.compare(frustum.aspectRatio, aspectRatio) != 0) return false;
    if (Float.compare(frustum.distance, distance) != 0) return false;

    return true;
  }

  @Override
  public int hashCode() {
    int result = (distance != +0.0f ? Float.floatToIntBits(distance) : 0);
    result = 31 * result + (aspectRatio != +0.0f ? Float.floatToIntBits(aspectRatio) : 0);
    return result;
  }

  public boolean isEmpty() {
    return distance == 0f;
  }
}

Java Source Code List

• Back to Graphics/graph  ↑