533 lines
20 KiB
C#
533 lines
20 KiB
C#
/*
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* Copyright (c) Contributors, http://www.openmetaverse.org/
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* See CONTRIBUTORS.TXT for a full list of copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the OpenSim Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Drawing;
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using libTerrain;
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namespace OpenSim.Terrain
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{
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public class TerrainEngine
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{
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/// <summary>
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/// A [normally] 256x256 heightmap
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/// </summary>
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public Channel heightmap;
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/// <summary>
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/// Whether or not the terrain has been modified since it was last saved and sent to the Physics engine.
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/// Counts the number of modifications since the last save. (0 = Untainted)
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/// </summary>
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public int tainted;
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int w, h;
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/// <summary>
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/// Generate a new TerrainEngine instance and creates a new heightmap
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/// </summary>
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public TerrainEngine()
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{
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w = 256;
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h = 256;
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heightmap = new Channel(w, h);
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tainted++;
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}
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/// <summary>
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/// Converts the heightmap to a 65536 value 1D floating point array
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/// </summary>
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/// <returns>A float[65536] array containing the heightmap</returns>
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public float[] getHeights1D()
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{
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float[] heights = new float[w * h];
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int i;
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for (i = 0; i < w * h; i++)
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{
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heights[i] = (float)heightmap.map[i / w, i % w];
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}
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return heights;
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}
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/// <summary>
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/// Converts the heightmap to a 256x256 value 2D floating point array.
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/// </summary>
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/// <returns>An array of 256,256 values containing the heightmap</returns>
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public float[,] getHeights2D()
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{
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float[,] heights = new float[w, h];
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int x, y;
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for (x = 0; x < w; x++)
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{
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for (y = 0; y < h; y++)
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{
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heights[x, y] = (float)heightmap.map[x, y];
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}
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}
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return heights;
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}
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/// <summary>
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/// Imports a 1D floating point array into the 2D heightmap array
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/// </summary>
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/// <param name="heights">The array to import (must have 65536 members)</param>
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public void setHeights1D(float[] heights)
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{
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int i;
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for (i = 0; i < w * h; i++)
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{
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heightmap.map[i / w, i % w] = heights[i];
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}
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tainted++;
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}
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/// <summary>
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/// Loads a 2D array of values into the heightmap
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/// </summary>
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/// <param name="heights">An array of 256,256 float values</param>
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public void setHeights2D(float[,] heights)
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{
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int x, y;
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for (x = 0; x < w; x++)
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{
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for (y = 0; y < h; y++)
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{
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heightmap.set(x, y, (double)heights[x, y]);
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}
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}
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tainted++;
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}
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/// <summary>
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/// Processes a terrain-specific command
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/// </summary>
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/// <param name="args">Commandline arguments (space seperated)</param>
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/// <param name="resultText">Reference that returns error or help text if returning false</param>
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/// <returns>If the operation was successful (if not, the error is placed into resultText)</returns>
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public bool RunTerrainCmd(string[] args, ref string resultText)
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{
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string command = args[0];
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try
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{
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switch (command)
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{
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case "help":
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resultText += "terrain regenerate - rebuilds the sims terrain using a default algorithm\n";
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resultText += "terrain seed <seed> - sets the random seed value to <seed>\n";
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resultText += "terrain load <type> <filename> - loads a terrain from disk, type can be 'F32', 'F64', 'RAW' or 'IMG'\n";
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resultText += "terrain save <type> <filename> - saves a terrain to disk, type can be 'F32' or 'F64'\n";
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resultText += "terrain save grdmap <filename> <gradient map> - creates a PNG snapshot of the region using a named gradient map\n";
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resultText += "terrain rescale <min> <max> - rescales a terrain to be between <min> and <max> meters high\n";
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resultText += "terrain erode aerobic <windspeed> <pickupmin> <dropmin> <carry> <rounds> <lowest>\n";
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resultText += "terrain erode thermal <talus> <rounds> <carry>\n";
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resultText += "terrain multiply <val> - multiplies a terrain by <val>\n";
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return false;
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case "seed":
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setSeed(Convert.ToInt32(args[1]));
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break;
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case "erode":
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switch (args[1].ToLower())
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{
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case "aerobic":
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// WindSpeed, PickupMinimum,DropMinimum,Carry,Rounds,Lowest
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heightmap.AerobicErosion(Convert.ToDouble(args[2]), Convert.ToDouble(args[3]), Convert.ToDouble(args[4]), Convert.ToDouble(args[5]), Convert.ToInt32(args[6]), Convert.ToBoolean(args[7]));
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break;
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case "thermal":
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heightmap.thermalWeathering(Convert.ToDouble(args[2]), Convert.ToInt32(args[3]), Convert.ToDouble(args[4]));
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break;
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default:
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resultText = "Unknown erosion type";
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return false;
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}
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break;
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case "regenerate":
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hills();
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break;
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case "rescale":
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setRange(Convert.ToSingle(args[1]), Convert.ToSingle(args[2]));
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break;
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case "multiply":
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heightmap *= Convert.ToDouble(args[1]);
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break;
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case "load":
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switch (args[1].ToLower())
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{
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case "f32":
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loadFromFileF32(args[2]);
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break;
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case "f64":
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loadFromFileF64(args[2]);
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break;
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case "raw":
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loadFromFileSLRAW(args[2]);
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break;
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case "img":
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loadFromFileIMG(args[2]);
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return false;
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default:
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resultText = "Unknown image or data format";
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return false;
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}
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break;
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case "save":
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switch (args[1].ToLower())
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{
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case "f32":
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writeToFileF32(args[2]);
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break;
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case "f64":
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writeToFileF64(args[2]);
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break;
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case "grdmap":
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exportImage(args[2], args[3]);
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break;
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default:
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resultText = "Unknown image or data format";
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return false;
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}
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break;
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default:
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resultText = "Unknown terrain command";
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return false;
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}
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return true;
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}
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catch (Exception e)
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{
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resultText = "Error running terrain command: " + e.ToString();
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return false;
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}
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}
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/// <summary>
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/// Renormalises the array between min and max
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/// </summary>
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/// <param name="min">Minimum value of the new array</param>
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/// <param name="max">Maximum value of the new array</param>
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public void setRange(float min, float max)
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{
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heightmap.normalise((double)min, (double)max);
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tainted++;
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}
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/// <summary>
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/// Loads a file from an image compatible with System.Drawing
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/// </summary>
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/// <param name="filename">File to load</param>
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public void loadFromFileIMG(string filename)
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{
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System.Drawing.Bitmap bmp = new Bitmap(filename);
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if (bmp.Width != heightmap.w && bmp.Height != heightmap.h)
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throw new Exception("Wrong image size! Images for this region must be " + heightmap.w.ToString() + " by " + heightmap.h.ToString() + " pixels in dimension");
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int x, y;
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for (x = 0; x < w; x++)
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{
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for (y = 0; y < h; y++)
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{
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Color c = bmp.GetPixel(x, y);
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}
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}
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}
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/// <summary>
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/// Loads a file consisting of 256x256 doubles and imports it as an array into the map.
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/// </summary>
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/// <remarks>TODO: Move this to libTerrain itself</remarks>
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/// <param name="filename">The filename of the double array to import</param>
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public void loadFromFileF64(string filename)
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{
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System.IO.FileInfo file = new System.IO.FileInfo(filename);
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System.IO.FileStream s = file.Open(System.IO.FileMode.Open, System.IO.FileAccess.Read);
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System.IO.BinaryReader bs = new System.IO.BinaryReader(s);
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int x, y;
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for (x = 0; x < w; x++)
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{
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for (y = 0; y < h; y++)
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{
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heightmap.map[x, y] = bs.ReadDouble();
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}
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}
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bs.Close();
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s.Close();
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tainted++;
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}
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/// <summary>
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/// Loads a file consisting of 256x256 floats and imports it as an array into the map.
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/// </summary>
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/// <remarks>TODO: Move this to libTerrain itself</remarks>
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/// <param name="filename">The filename of the float array to import</param>
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public void loadFromFileF32(string filename)
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{
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System.IO.FileInfo file = new System.IO.FileInfo(filename);
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System.IO.FileStream s = file.Open(System.IO.FileMode.Open, System.IO.FileAccess.Read);
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System.IO.BinaryReader bs = new System.IO.BinaryReader(s);
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int x, y;
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for (x = 0; x < w; x++)
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{
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for (y = 0; y < h; y++)
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{
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heightmap.map[x, y] = (double)bs.ReadSingle();
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}
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}
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bs.Close();
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s.Close();
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tainted++;
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}
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/// <summary>
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/// Loads a file formatted in the SL .RAW Format used on the main grid
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/// </summary>
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/// <remarks>This file format stinks and is best avoided.</remarks>
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/// <param name="filename">A path to the .RAW format</param>
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public void loadFromFileSLRAW(string filename)
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{
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System.IO.FileInfo file = new System.IO.FileInfo(filename);
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System.IO.FileStream s = file.Open(System.IO.FileMode.Open, System.IO.FileAccess.Read);
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System.IO.BinaryReader bs = new System.IO.BinaryReader(s);
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int x, y;
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for (x = 0; x < w; x++)
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{
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for (y = 0; y < h; y++)
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{
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heightmap.map[x, y] = (double)bs.ReadByte() * ((double)bs.ReadByte() / 127.0);
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bs.ReadBytes(11); // Advance the stream to next bytes.
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}
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}
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bs.Close();
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s.Close();
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tainted++;
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}
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/// <summary>
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/// Writes the current terrain heightmap to disk, in the format of a 65536 entry double[] array.
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/// </summary>
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/// <param name="filename">The desired output filename</param>
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public void writeToFileF64(string filename)
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{
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System.IO.FileInfo file = new System.IO.FileInfo(filename);
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System.IO.FileStream s = file.Open(System.IO.FileMode.CreateNew, System.IO.FileAccess.Write);
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System.IO.BinaryWriter bs = new System.IO.BinaryWriter(s);
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int x, y;
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for (x = 0; x < w; x++)
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{
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for (y = 0; y < h; y++)
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{
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bs.Write(heightmap.get(x, y));
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}
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}
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bs.Close();
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s.Close();
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}
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/// <summary>
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/// Writes the current terrain heightmap to disk, in the format of a 65536 entry float[] array
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/// </summary>
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/// <param name="filename">The desired output filename</param>
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public void writeToFileF32(string filename)
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{
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System.IO.FileInfo file = new System.IO.FileInfo(filename);
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System.IO.FileStream s = file.Open(System.IO.FileMode.CreateNew, System.IO.FileAccess.Write);
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System.IO.BinaryWriter bs = new System.IO.BinaryWriter(s);
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int x, y;
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for (x = 0; x < w; x++)
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{
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for (y = 0; y < h; y++)
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{
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bs.Write((float)heightmap.get(x, y));
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}
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}
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bs.Close();
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s.Close();
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}
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/// <summary>
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/// Sets the random seed to be used by procedural functions which involve random numbers.
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/// </summary>
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/// <param name="val">The desired seed</param>
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public void setSeed(int val)
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{
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heightmap.seed = val;
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}
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/// <summary>
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/// Raises land in a sphere around the specified coordinates
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/// </summary>
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/// <param name="rx">Center of the sphere on the X axis</param>
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/// <param name="ry">Center of the sphere on the Y axis</param>
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/// <param name="size">The radius of the sphere</param>
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/// <param name="amount">Scale the height of the sphere by this amount (recommended 0..2)</param>
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public void raise(double rx, double ry, double size, double amount)
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{
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lock (heightmap)
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{
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heightmap.raise(rx, ry, size, amount);
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}
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tainted++;
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}
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/// <summary>
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/// Lowers the land in a sphere around the specified coordinates
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/// </summary>
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/// <param name="rx">The center of the sphere at the X axis</param>
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/// <param name="ry">The center of the sphere at the Y axis</param>
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/// <param name="size">The radius of the sphere in meters</param>
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/// <param name="amount">Scale the height of the sphere by this amount (recommended 0..2)</param>
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public void lower(double rx, double ry, double size, double amount)
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{
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lock (heightmap)
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{
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heightmap.lower(rx, ry, size, amount);
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}
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tainted++;
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}
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/// <summary>
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/// Generates a simple set of hills in the shape of an island
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/// </summary>
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public void hills()
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{
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lock (heightmap)
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{
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heightmap.hillsSpheres(200, 20, 40, true, true, false);
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heightmap.normalise();
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heightmap *= 60.0; // Raise to 60m
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}
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tainted++;
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}
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/// <summary>
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/// Multiplies the heightfield by val
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/// </summary>
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/// <param name="meep">The heightfield</param>
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/// <param name="val">The multiplier</param>
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/// <returns></returns>
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public static TerrainEngine operator *(TerrainEngine meep, Double val)
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{
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meep.heightmap *= val;
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meep.tainted++;
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return meep;
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}
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/// <summary>
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/// Returns the height at the coordinates x,y
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/// </summary>
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/// <param name="x">X Coordinate</param>
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/// <param name="y">Y Coordinate</param>
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/// <returns></returns>
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public float this[int x, int y]
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{
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get
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{
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return (float)heightmap.get(x, y);
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}
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set
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{
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tainted++;
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heightmap.set(x, y, (double)value);
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}
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}
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/// <summary>
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/// Exports the current heightmap to a PNG file
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/// </summary>
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/// <param name="filename">The destination filename for the image</param>
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/// <param name="gradientmap">A 1x*height* image which contains the colour gradient to export with. Must be at least 1x2 pixels, 1x256 or more is ideal.</param>
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public void exportImage(string filename, string gradientmap)
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{
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try
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{
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Bitmap gradientmapLd = new Bitmap(gradientmap);
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int pallete = gradientmapLd.Height;
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Bitmap bmp = new Bitmap(heightmap.w, heightmap.h);
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Color[] colours = new Color[pallete];
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for (int i = 0; i < pallete; i++)
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{
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colours[i] = gradientmapLd.GetPixel(0, i);
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}
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Channel copy = heightmap.copy();
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for (int x = 0; x < copy.w; x++)
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{
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for (int y = 0; y < copy.h; y++)
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{
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// 512 is the largest possible height before colours clamp
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int colorindex = (int)(Math.Max(Math.Min(1.0, copy.get(x, y) / 512.0), 0.0) * pallete);
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bmp.SetPixel(y, 255 - x, colours[colorindex]);
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}
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}
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bmp.Save(filename, System.Drawing.Imaging.ImageFormat.Png);
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}
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catch (Exception e)
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{
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Console.WriteLine("Failed generating terrain map: " + e.ToString());
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}
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}
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}
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} |