Here you can find the source of interpolate(Rectangle r1, Rectangle r2, float f)
public static Rectangle interpolate(Rectangle r1, Rectangle r2, float f)
//package com.java2s; /******************************************************************************* * Breakout Cave Survey Visualizer//www .j a v a 2 s . c om * * Copyright (C) 2014 James Edwards * * jedwards8 at fastmail dot fm * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *******************************************************************************/ import java.awt.Rectangle; public class Main { public static Rectangle interpolate(Rectangle r1, Rectangle r2, float f) { Rectangle out = new Rectangle(); interpolate(r1, r2, f, out); return out; } public static void interpolate(Rectangle r1, Rectangle r2, float f, Rectangle out) { if (r1.x + r1.width == r2.x + r2.width) { int right = r1.x + r1.width; out.x = Math.round(r1.x * (1f - f) + r2.x * f); out.width = right - out.x; } else { out.x = Math.round(r1.x * (1f - f) + r2.x * f); out.width = Math.round(r1.width * (1f - f) + r2.width * f); } if (r1.y + r1.height == r2.y + r2.height) { int bottom = r1.y + r1.height; out.y = Math.round(r1.y * (1f - f) + r2.y * f); out.height = bottom - out.y; } else { out.y = Math.round(r1.y * (1f - f) + r2.y * f); out.height = Math.round(r1.height * (1f - f) + r2.height * f); } } }