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/*
* Copyright (C) 2007 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.graphics;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.FloatMath;
/**
* PointF holds two float coordinates
*/
public class PointF implements Parcelable {
public float x;
public float y;
public PointF() {}
public PointF(float x, float y) {
this.x = x;
this.y = y;
}
public PointF(Point p) {
this.x = p.x;
this.y = p.y;
}
/**
* Set the point's x and y coordinates
*/
public final void set(float x, float y) {
this.x = x;
this.y = y;
}
/**
* Set the point's x and y coordinates to the coordinates of p
*/
public final void set(PointF p) {
this.x = p.x;
this.y = p.y;
}
public final void negate() {
x = -x;
y = -y;
}
public final void offset(float dx, float dy) {
x += dx;
y += dy;
}
/**
* Returns true if the point's coordinates equal (x,y)
*/
public final boolean equals(float x, float y) {
return this.x == x && this.y == y;
}
/**
* Return the euclidian distance from (0,0) to the point
*/
public final float length() {
return length(x, y);
}
/**
* Returns the euclidian distance from (0,0) to (x,y)
*/
public static float length(float x, float y) {
return FloatMath.sqrt(x * x + y * y);
}
/**
* Parcelable interface methods
*/
@Override
public int describeContents() {
return 0;
}
/**
* Write this point to the specified parcel. To restore a point from
* a parcel, use readFromParcel()
* @param out The parcel to write the point's coordinates into
*/
@Override
public void writeToParcel(Parcel out, int flags) {
out.writeFloat(x);
out.writeFloat(y);
}
public static final Parcelable.Creator<PointF> CREATOR = new Parcelable.Creator<PointF>() {
/**
* Return a new point from the data in the specified parcel.
*/
public PointF createFromParcel(Parcel in) {
PointF r = new PointF();
r.readFromParcel(in);
return r;
}
/**
* Return an array of rectangles of the specified size.
*/
public PointF[] newArray(int size) {
return new PointF[size];
}
};
/**
* Set the point's coordinates from the data stored in the specified
* parcel. To write a point to a parcel, call writeToParcel().
*
* @param in The parcel to read the point's coordinates from
*/
public void readFromParcel(Parcel in) {
x = in.readFloat();
y = in.readFloat();
}
}
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