/******************************************************************************* * Breakout Cave Survey Visualizer * * 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. *******************************************************************************/ package org.andork.jogl; import org.andork.math3d.Vecmath; public class OrthoProjection implements Projection { public float zNear; public float zFar; public float hSpan; public float vSpan; public OrthoProjection(float hSpan, float zNear, float zFar) { this.hSpan = hSpan; this.zNear = zNear; this.zFar = zFar; } @Override public void calculate(JoglDrawContext dc, float[] pOut) { float width = dc.width(); float height = dc.height(); float left, right, bottom, top; if (vSpan / hSpan > height / width) { top = vSpan / 2; bottom = -top; right = top * width / height; left = -right; } else { right = hSpan / 2; left = -right; top = right * height / width; bottom = -top; } Vecmath.ortho(pOut, left, right, bottom, top, zNear, zFar); } }