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/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.uwb;
import android.annotation.FloatRange;
import android.annotation.NonNull;
import android.annotation.SystemApi;
import android.os.Parcel;
import android.os.Parcelable;
import java.util.Objects;
/**
* Angle measurement
*
* <p>The actual angle is interpreted as:
* {@link #getRadians()} +/- {@link #getErrorRadians()} ()} at {@link #getConfidenceLevel()}
*
* @hide
*/
@SystemApi
public final class AngleMeasurement implements Parcelable {
private final double mRadians;
private final double mErrorRadians;
private final double mConfidenceLevel;
/**
* Constructs a new {@link AngleMeasurement} object
*
* @param radians the angle in radians
* @param errorRadians the error of the angle measurement in radians
* @param confidenceLevel confidence level of the angle measurement
*
* @throws IllegalArgumentException if the radians, errorRadians, or confidenceLevel is out of
* allowed range
*/
public AngleMeasurement(
@FloatRange(from = -Math.PI, to = +Math.PI) double radians,
@FloatRange(from = 0.0, to = +Math.PI) double errorRadians,
@FloatRange(from = 0.0, to = 1.0) double confidenceLevel) {
if (radians < -Math.PI || radians > Math.PI) {
throw new IllegalArgumentException("Invalid radians: " + radians);
}
mRadians = radians;
if (errorRadians < 0.0 || errorRadians > Math.PI) {
throw new IllegalArgumentException("Invalid error radians: " + errorRadians);
}
mErrorRadians = errorRadians;
if (confidenceLevel < 0.0 || confidenceLevel > 1.0) {
throw new IllegalArgumentException("Invalid confidence level: " + confidenceLevel);
}
mConfidenceLevel = confidenceLevel;
}
/**
* Angle measurement in radians
*
* @return angle in radians
*/
@FloatRange(from = -Math.PI, to = +Math.PI)
public double getRadians() {
return mRadians;
}
/**
* Error of angle measurement in radians
*
* <p>Must be a positive value
*
* @return angle measurement error in radians
*/
@FloatRange(from = 0.0, to = +Math.PI)
public double getErrorRadians() {
return mErrorRadians;
}
/**
* Angle measurement confidence level expressed as a value between
* 0.0 to 1.0.
*
* <p>A value of 0.0 indicates there is no confidence in the measurement. A value of 1.0
* indicates there is maximum confidence in the measurement.
*
* @return the confidence level of the angle measurement
*/
@FloatRange(from = 0.0, to = 1.0)
public double getConfidenceLevel() {
return mConfidenceLevel;
}
/**
* @hide
*/
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof AngleMeasurement) {
AngleMeasurement other = (AngleMeasurement) obj;
return mRadians == other.getRadians()
&& mErrorRadians == other.getErrorRadians()
&& mConfidenceLevel == other.getConfidenceLevel();
}
return false;
}
/**
* @hide
*/
@Override
public int hashCode() {
return Objects.hash(mRadians, mErrorRadians, mConfidenceLevel);
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(@NonNull Parcel dest, int flags) {
dest.writeDouble(mRadians);
dest.writeDouble(mErrorRadians);
dest.writeDouble(mConfidenceLevel);
}
public static final @android.annotation.NonNull Creator<AngleMeasurement> CREATOR =
new Creator<AngleMeasurement>() {
@Override
public AngleMeasurement createFromParcel(Parcel in) {
return new AngleMeasurement(in.readDouble(), in.readDouble(), in.readDouble());
}
@Override
public AngleMeasurement[] newArray(int size) {
return new AngleMeasurement[size];
}
};
}
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