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Sculpt meshing refactoring - improves mesh accuracy and UV mapping 

Sync with PrimMesher r55
slimupdates2
dahlia 2010-05-06 21:36:27 -07:00
parent 6182d71326
commit 5d1e9947ed
2 changed files with 810 additions and 639 deletions
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169
OpenSim/Region/Physics/Meshing/SculptMap.cs Normal file
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@ -0,0 +1,169 @@
/*
* Copyright (c) Contributors
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the OpenSimulator Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// to build without references to System.Drawing, comment this out
#define SYSTEM_DRAWING
using System;
using System.Collections.Generic;
using System.Text;
#if SYSTEM_DRAWING
using System.Drawing;
using System.Drawing.Imaging;
namespace PrimMesher
{
public class SculptMap
{
public int width;
public int height;
public byte[] redBytes;
public byte[] greenBytes;
public byte[] blueBytes;
public SculptMap()
{
}
public SculptMap(Bitmap bm, int lod)
{
int bmW = bm.Width;
int bmH = bm.Height;
if (bmW == 0 || bmH == 0)
throw new Exception("SculptMap: bitmap has no data");
int numLodPixels = lod * 2 * lod * 2; // (32 * 2)^2 = 64^2 pixels for default sculpt map image
width = bmW;
height = bmH;
while (width * height > numLodPixels)
{
width >>= 1;
height >>= 1;
}
width >>= 1;
height >>= 1;
try
{
if (!(bmW == width * 2 && bmH == height * 2))
bm = ScaleImage(bm, width * 2, height * 2,
System.Drawing.Drawing2D.InterpolationMode.NearestNeighbor);
}
catch (Exception e)
{
throw new Exception("Exception in ScaleImage(): e: " + e.ToString());
}
int numBytes = (width + 1) * (height + 1);
redBytes = new byte[numBytes];
greenBytes = new byte[numBytes];
blueBytes = new byte[numBytes];
int byteNdx = 0;
try
{
for (int y = 0; y <= height; y++)
{
for (int x = 0; x <= width; x++)
{
int bmY = y < height ? y * 2 : y * 2 - 1;
int bmX = x < width ? x * 2 : x * 2 - 1;
Color c = bm.GetPixel(bmX, bmY);
redBytes[byteNdx] = c.R;
greenBytes[byteNdx] = c.G;
blueBytes[byteNdx] = c.B;
++byteNdx;
}
}
}
catch (Exception e)
{
throw new Exception("Caught exception processing byte arrays in SculptMap(): e: " + e.ToString());
}
width++;
height++;
}
public List<List<Coord>> ToRows(bool mirror)
{
int numRows = height;
int numCols = width;
List<List<Coord>> rows = new List<List<Coord>>(numRows);
float pixScale = 1.0f / 255;
int rowNdx, colNdx;
int smNdx = 0;
for (rowNdx = 0; rowNdx < numRows; rowNdx++)
{
List<Coord> row = new List<Coord>(numCols);
for (colNdx = 0; colNdx < numCols; colNdx++)
{
if (mirror)
row.Add(new Coord(-(redBytes[smNdx] * pixScale - 0.5f), (greenBytes[smNdx] * pixScale - 0.5f), blueBytes[smNdx] * pixScale - 0.5f));
else
row.Add(new Coord(redBytes[smNdx] * pixScale - 0.5f, greenBytes[smNdx] * pixScale - 0.5f, blueBytes[smNdx] * pixScale - 0.5f));
++smNdx;
}
rows.Add(row);
}
return rows;
}
private Bitmap ScaleImage(Bitmap srcImage, int destWidth, int destHeight,
System.Drawing.Drawing2D.InterpolationMode interpMode)
{
Bitmap scaledImage = new Bitmap(srcImage, destWidth, destHeight);
scaledImage.SetResolution(96.0f, 96.0f);
Graphics grPhoto = Graphics.FromImage(scaledImage);
grPhoto.InterpolationMode = interpMode;
grPhoto.DrawImage(srcImage,
new Rectangle(0, 0, destWidth, destHeight),
new Rectangle(0, 0, srcImage.Width, srcImage.Height),
GraphicsUnit.Pixel);
grPhoto.Dispose();
return scaledImage;
}
}
}
#endif

140
OpenSim/Region/Physics/Meshing/SculptMesh.cs
View File

@ -53,50 +53,6 @@ namespace PrimMesher
public enum SculptType { sphere = 1, torus = 2, plane = 3, cylinder = 4 };
#if SYSTEM_DRAWING
private Bitmap ScaleImage(Bitmap srcImage, float scale, bool removeAlpha)
{
int sourceWidth = srcImage.Width;
int sourceHeight = srcImage.Height;
int sourceX = 0;
int sourceY = 0;
int destX = 0;
int destY = 0;
int destWidth = (int)(srcImage.Width * scale);
int destHeight = (int)(srcImage.Height * scale);
Bitmap scaledImage;
if (removeAlpha)
{
if (srcImage.PixelFormat == PixelFormat.Format32bppArgb)
for (int y = 0; y < srcImage.Height; y++)
for (int x = 0; x < srcImage.Width; x++)
{
Color c = srcImage.GetPixel(x, y);
srcImage.SetPixel(x, y, Color.FromArgb(255, c.R, c.G, c.B));
}
scaledImage = new Bitmap(destWidth, destHeight,
PixelFormat.Format24bppRgb);
}
else
scaledImage = new Bitmap(srcImage, destWidth, destHeight);
scaledImage.SetResolution(96.0f, 96.0f);
Graphics grPhoto = Graphics.FromImage(scaledImage);
grPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.Low;
grPhoto.DrawImage(srcImage,
new Rectangle(destX, destY, destWidth, destHeight),
new Rectangle(sourceX, sourceY, sourceWidth, sourceHeight),
GraphicsUnit.Pixel);
grPhoto.Dispose();
return scaledImage;
}
public SculptMesh SculptMeshFromFile(string fileName, SculptType sculptType, int lod, bool viewerMode)
{
@ -106,6 +62,7 @@ namespace PrimMesher
return sculptMesh;
}
public SculptMesh(string fileName, int sculptType, int lod, int viewerMode, int mirror, int invert)
{
Bitmap bitmap = (Bitmap)Bitmap.FromFile(fileName);
@ -296,36 +253,53 @@ namespace PrimMesher
return rows;
}
private List<List<Coord>> bitmap2CoordsSampled(Bitmap bitmap, int scale, bool mirror)
{
int numRows = bitmap.Height / scale;
int numCols = bitmap.Width / scale;
List<List<Coord>> rows = new List<List<Coord>>(numRows);
float pixScale = 1.0f / 256.0f;
int imageX, imageY = 0;
int rowNdx, colNdx;
for (rowNdx = 0; rowNdx <= numRows; rowNdx++)
{
List<Coord> row = new List<Coord>(numCols);
imageY = rowNdx * scale;
if (rowNdx == numRows) imageY--;
for (colNdx = 0; colNdx <= numCols; colNdx++)
{
imageX = colNdx * scale;
if (colNdx == numCols) imageX--;
Color c = bitmap.GetPixel(imageX, imageY);
if (c.A != 255)
{
bitmap.SetPixel(imageX, imageY, Color.FromArgb(255, c.R, c.G, c.B));
c = bitmap.GetPixel(imageX, imageY);
}
if (mirror)
row.Add(new Coord(-(c.R * pixScale - 0.5f), c.G * pixScale - 0.5f, c.B * pixScale - 0.5f));
else
row.Add(new Coord(c.R * pixScale - 0.5f, c.G * pixScale - 0.5f, c.B * pixScale - 0.5f));
}
rows.Add(row);
}
return rows;
}
void _SculptMesh(Bitmap sculptBitmap, SculptType sculptType, int lod, bool viewerMode, bool mirror, bool invert)
{
coords = new List<Coord>();
faces = new List<Face>();
normals = new List<Coord>();
uvs = new List<UVCoord>();
sculptType = (SculptType)(((int)sculptType) & 0x07);
if (mirror)
if (sculptType == SculptType.plane)
invert = !invert;
float sculptBitmapLod = (float)Math.Sqrt(sculptBitmap.Width * sculptBitmap.Height);
float sourceScaleFactor = (float)(lod) / sculptBitmapLod;
float fScale = 1.0f / sourceScaleFactor;
int iScale = (int)fScale;
if (iScale < 1) iScale = 1;
if (iScale > 2 && iScale % 2 == 0)
_SculptMesh(bitmap2Coords(ScaleImage(sculptBitmap, 64.0f / sculptBitmapLod, true), 64 / lod, mirror), sculptType, viewerMode, mirror, invert);
else
_SculptMesh(bitmap2Coords(sculptBitmap, iScale, mirror), sculptType, viewerMode, mirror, invert);
_SculptMesh(new SculptMap(sculptBitmap, lod).ToRows(mirror), sculptType, viewerMode, mirror, invert);
}
#endif
void _SculptMesh(List<List<Coord>> rows, SculptType sculptType, bool viewerMode, bool mirror, bool invert)
{
coords = new List<Coord>();
@ -348,15 +322,27 @@ namespace PrimMesher
int imageX, imageY;
if (sculptType != SculptType.plane)
{
if (rows.Count % 2 == 0)
{
for (int rowNdx = 0; rowNdx < rows.Count; rowNdx++)
rows[rowNdx].Add(rows[rowNdx][0]);
}
else
{
int lastIndex = rows[0].Count - 1;
for (int i = 0; i < rows.Count; i++)
rows[i][0] = rows[i][lastIndex];
}
}
Coord topPole = rows[0][width / 2];
Coord bottomPole = rows[rows.Count - 1][width / 2];
if (sculptType == SculptType.sphere)
{
if (rows.Count % 2 == 0)
{
int count = rows[0].Count;
List<Coord> topPoleRow = new List<Coord>(count);
@ -370,11 +356,27 @@ namespace PrimMesher
rows.Insert(0, topPoleRow);
rows.Add(bottomPoleRow);
}
else if (sculptType == SculptType.torus)
else
{
int count = rows[0].Count;
List<Coord> topPoleRow = rows[0];
List<Coord> bottomPoleRow = rows[rows.Count - 1];
for (int i = 0; i < count; i++)
{
topPoleRow[i] = topPole;
bottomPoleRow[i] = bottomPole;
}
}
}
if (sculptType == SculptType.torus)
rows.Add(rows[0]);
int coordsDown = rows.Count;
int coordsAcross = rows[0].Count;
int lastColumn = coordsAcross - 1;
float widthUnit = 1.0f / (coordsAcross - 1);
float heightUnit = 1.0f / (coordsDown - 1);