| /* |
| * Copyright (C) 2011 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.filterfw.geometry; |
| |
| import java.lang.Math; |
| |
| /** |
| * @hide |
| */ |
| public class Point { |
| |
| public float x; |
| public float y; |
| |
| public Point() { |
| } |
| |
| public Point(float x, float y) { |
| this.x = x; |
| this.y = y; |
| } |
| |
| public void set(float x, float y) { |
| this.x = x; |
| this.y = y; |
| } |
| |
| public boolean IsInUnitRange() { |
| return x >= 0.0f && x <= 1.0f && |
| y >= 0.0f && y <= 1.0f; |
| } |
| |
| public Point plus(float x, float y) { |
| return new Point(this.x + x, this.y + y); |
| } |
| |
| public Point plus(Point point) { |
| return this.plus(point.x, point.y); |
| } |
| |
| public Point minus(float x, float y) { |
| return new Point(this.x - x, this.y - y); |
| } |
| |
| public Point minus(Point point) { |
| return this.minus(point.x, point.y); |
| } |
| |
| public Point times(float s) { |
| return new Point(this.x * s, this.y * s); |
| } |
| |
| public Point mult(float x, float y) { |
| return new Point(this.x * x, this.y * y); |
| } |
| |
| public float length() { |
| return (float)Math.sqrt(x*x + y*y); |
| } |
| |
| public float distanceTo(Point p) { |
| return p.minus(this).length(); |
| } |
| |
| public Point scaledTo(float length) { |
| return this.times(length / this.length()); |
| } |
| |
| public Point normalize() { |
| return this.scaledTo(1.0f); |
| } |
| |
| public Point rotated90(int count) { |
| float nx = this.x; |
| float ny = this.y; |
| for (int i = 0; i < count; ++i) { |
| float ox = nx; |
| nx = ny; |
| ny = -ox; |
| } |
| return new Point(nx, ny); |
| } |
| |
| public Point rotated(float radians) { |
| // TODO(renn): Optimize: Keep cache of cos/sin values |
| return new Point((float)(Math.cos(radians) * x - Math.sin(radians) * y), |
| (float)(Math.sin(radians) * x + Math.cos(radians) * y)); |
| } |
| |
| public Point rotatedAround(Point center, float radians) { |
| return this.minus(center).rotated(radians).plus(center); |
| } |
| |
| @Override |
| public String toString() { |
| return "(" + x + ", " + y + ")"; |
| } |
| } |