89 lines
2.6 KiB
Java
89 lines
2.6 KiB
Java
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/*
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Renderable.java
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*
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* Copyright (c) 2000, Ted Nelson and Tuomas Lukka
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*
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* You may use and distribute under the terms of either the GNU Lesser
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* General Public License, either version 2 of the license or,
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* at your choice, any later version. Alternatively, you may use and
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* distribute under the terms of the XPL.
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*
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* See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of
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* the licenses.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the README
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* file for more details.
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*
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*/
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/*
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* Written by Tuomas Lukka
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*/
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package org.gzigzag;
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import java.util.*;
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import java.awt.*;
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public abstract class Renderable {
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public static final String rcsid = "$Id: Renderable.java,v 1.10 2001/03/17 20:13:08 bfallenstein Exp $";
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public int d;
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/** Render this thing.
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*/
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abstract public void render(Graphics g);
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/** Render this thing.
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* Simply calls render(g).
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* @param orig The top-level graphics object without translations,
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* clippings, rotations, etc.
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*/
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public void render(Graphics g, Graphics orig) { render(g); }
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/** Translate the coordinates of this Renderable by (x, y)
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* I.e., add x from the x-coordinate and y from the y-coordinate.
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* This is used to translate between coordinate systems.
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* @returns False if translating is not supported.
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*/
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public boolean translate(int x, int y) {
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return false;
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}
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/** Do a stable depth-sort of renderables.
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* Of two renderables on the same depth, the relative order remains.
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* Uses radix sort for extreme speed.
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*/
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static public void depthSort(Renderable[] it, int nit) {
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Renderable[][] ftmp = new Renderable[][] { it, new Renderable[nit] };
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Renderable[][] ftmp2 = new Renderable[2][nit];
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Renderable[][] fs;
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int[] n = new int[] { nit, 0 };
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int[] newn = new int[2];
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int[] nex = null;
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int mx = 0;
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for(int i=0; i<nit; i++) {
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if(it[i].d > mx) mx = it[i].d;
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}
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for(int bit = 1; mx >= bit && bit!=0; bit <<= 1) {
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for(int bin=0; bin<2; bin++) {
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for(int i=0; i<n[bin]; i++) {
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if(ftmp[bin][i] == null) continue;
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int ind = (((ftmp[bin][i].d & bit) == 0) ? 0 : 1);
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ftmp2[ind][newn[ind]++] = ftmp[bin][i];
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}
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}
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fs = ftmp2; ftmp2 = ftmp; ftmp = fs;
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nex = n; n = newn; newn = nex;
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newn[0] = newn[1] = 0;
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}
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for(int i=0; i<nit-n[0]; i++)
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ftmp[0][n[0]+i] = ftmp[1][i];
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if(it != ftmp[0]) {
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System.arraycopy(ftmp[0], 0, it, 0, nit);
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}
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}
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}
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