/*
* 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 OpenSim 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.
*/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
namespace PrimMesher
{
public class SculptMesh
{
public List<Coord> coords;
public List<Face> faces;
public List<ViewerFace> viewerFaces;
public List<Coord> normals;
public List<UVCoord> uvs;
public enum SculptType { sphere = 1, torus = 2, plane = 3, cylinder = 4 };
private const float pixScale = 0.00390625f; // 1.0 / 256
private Bitmap ScaleImage(Bitmap srcImage, float scale)
{
int sourceWidth = srcImage.Width;
int sourceHeight = srcImage.Height;
int sourceX = 0;
int sourceY = 0;
int destX = 0;
int destY = 0;
int destWidth = (int)(sourceWidth * scale);
int destHeight = (int)(sourceHeight * scale);
Bitmap scaledImage = new Bitmap(destWidth, destHeight,
PixelFormat.Format24bppRgb);
scaledImage.SetResolution(srcImage.HorizontalResolution,
srcImage.VerticalResolution);
Graphics grPhoto = Graphics.FromImage(scaledImage);
grPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.Bilinear;
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)
{
Bitmap bitmap = (Bitmap)Bitmap.FromFile(fileName);
SculptMesh sculptMesh = new SculptMesh(bitmap, sculptType, lod, viewerMode);
bitmap.Dispose();
return sculptMesh;
}
public SculptMesh(Bitmap sculptBitmap, SculptType sculptType, int lod, bool viewerMode)
{
coords = new List<Coord>();
faces = new List<Face>();
normals = new List<Coord>();
uvs = new List<UVCoord>();
float sourceScaleFactor = (float)lod / (float)Math.Max(sculptBitmap.Width, sculptBitmap.Height);
bool scaleSourceImage = sourceScaleFactor < 1.0f ? true : false;
Bitmap bitmap;
if (scaleSourceImage)
bitmap = ScaleImage(sculptBitmap, sourceScaleFactor);
else
bitmap = sculptBitmap;
viewerFaces = new List<ViewerFace>();
int width = bitmap.Width;
int height = bitmap.Height;
float widthUnit = 1.0f / width;
float heightUnit = 1.0f / (height - 1);
int p1, p2, p3, p4;
Color color;
float x, y, z;
int imageX, imageY;
if (sculptType == SculptType.sphere)
{ // average the top and bottom row pixel values so the resulting vertices appear to converge
int lastRow = height - 1;
int r1 = 0, g1 = 0, b1 = 0;
int r2 = 0, g2 = 0, b2 = 0;
for (imageX = 0; imageX < width; imageX++)
{
Color c1 = bitmap.GetPixel(imageX, 0);
Color c2 = bitmap.GetPixel(imageX, lastRow);
r1 += c1.R;
g1 += c1.G;
b1 += c1.B;
r2 += c2.R;
g2 += c2.G;
b2 += c2.B;
}
Color newC1 = Color.FromArgb(r1 / width, g1 / width, b1 / width);
Color newC2 = Color.FromArgb(r2 / width, g2 / width, b2 / width);
for (imageX = 0; imageX < width; imageX++)
{
bitmap.SetPixel(imageX, 0, newC1);
bitmap.SetPixel(imageX, lastRow, newC2);
}
}
int pixelsAcross = sculptType == SculptType.plane ? width : width + 1;
int pixelsDown = sculptType == SculptType.sphere || sculptType == SculptType.cylinder ? height + 1 : height;
for (imageY = 0; imageY < pixelsDown; imageY++)
{
int rowOffset = imageY * width;
for (imageX = 0; imageX < pixelsAcross; imageX++)
{
/*
* p1-----p2
* | \ f2 |
* | \ |
* | f1 \|
* p3-----p4
*/
if (imageX < width)
{
p4 = rowOffset + imageX;
p3 = p4 - 1;
}
else
{
p4 = rowOffset; // wrap around to beginning
p3 = rowOffset + imageX - 1;
}
p2 = p4 - width;
p1 = p3 - width;
color = bitmap.GetPixel(imageX == width ? 0 : imageX, imageY == height ? height - 1 : imageY);
x = (color.R - 128) * pixScale;
y = (color.G - 128) * pixScale;
z = (color.B - 128) * pixScale;
Coord c = new Coord(x, y, z);
this.coords.Add(c);
if (viewerMode)
{
this.normals.Add(new Coord());
this.uvs.Add(new UVCoord(widthUnit * imageX, heightUnit * imageY));
}
if (imageY > 0 && imageX > 0)
{
Face f1, f2;
if (viewerMode)
{
f1 = new Face(p1, p3, p4, p1, p3, p4);
f1.uv1 = p1;
f1.uv2 = p3;
f1.uv3 = p4;
f2 = new Face(p1, p4, p2, p1, p4, p2);
f2.uv1 = p1;
f2.uv2 = p4;
f2.uv3 = p2;
}
else
{
f1 = new Face(p1, p3, p4);
f2 = new Face(p1, p4, p2);
}
this.faces.Add(f1);
this.faces.Add(f2);
}
}
}
if (scaleSourceImage)
bitmap.Dispose();
if (viewerMode)
{ // compute vertex normals by summing all the surface normals of all the triangles sharing
// each vertex and then normalizing
int numFaces = this.faces.Count;
for (int i = 0; i < numFaces; i++)
{
Face face = this.faces[i];
Coord surfaceNormal = face.SurfaceNormal(this.coords);
this.normals[face.v1] += surfaceNormal;
this.normals[face.v2] += surfaceNormal;
this.normals[face.v3] += surfaceNormal;
}
int numCoords = this.coords.Count;
for (int i = 0; i < numCoords; i++)
this.coords[i].Normalize();
if (sculptType != SculptType.plane)
{ // blend the vertex normals at the cylinder seam
pixelsAcross = width + 1;
for (imageY = 0; imageY < height; imageY++)
{
int rowOffset = imageY * pixelsAcross;
this.normals[rowOffset] = this.normals[rowOffset + width - 1] = (this.normals[rowOffset] + this.normals[rowOffset + width - 1]).Normalize();
}
}
foreach (Face face in this.faces)
{
ViewerFace vf = new ViewerFace(0);
vf.v1 = this.coords[face.v1];
vf.v2 = this.coords[face.v2];
vf.v3 = this.coords[face.v3];
vf.n1 = this.normals[face.n1];
vf.n2 = this.normals[face.n2];
vf.n3 = this.normals[face.n3];
vf.uv1 = this.uvs[face.uv1];
vf.uv2 = this.uvs[face.uv2];
vf.uv3 = this.uvs[face.uv3];
this.viewerFaces.Add(vf);
}
}
}
public void AddRot(Quat q)
{
int i;
int numVerts = this.coords.Count;
for (i = 0; i < numVerts; i++)
this.coords[i] *= q;
if (this.viewerFaces != null)
{
int numViewerFaces = this.viewerFaces.Count;
for (i = 0; i < numViewerFaces; i++)
{
ViewerFace v = this.viewerFaces[i];
v.v1 *= q;
v.v2 *= q;
v.v3 *= q;
v.n1 *= q;
v.n2 *= q;
v.n3 *= q;
this.viewerFaces[i] = v;
}
}
}
public void Scale(float x, float y, float z)
{
int i;
int numVerts = this.coords.Count;
//Coord vert;
Coord m = new Coord(x, y, z);
for (i = 0; i < numVerts; i++)
this.coords[i] *= m;
if (this.viewerFaces != null)
{
int numViewerFaces = this.viewerFaces.Count;
for (i = 0; i < numViewerFaces; i++)
{
ViewerFace v = this.viewerFaces[i];
v.v1 *= m;
v.v2 *= m;
v.v3 *= m;
this.viewerFaces[i] = v;
}
}
}
public void DumpRaw(String path, String name, String title)
{
if (path == null)
return;
String fileName = name + "_" + title + ".raw";
String completePath = Path.Combine(path, fileName);
StreamWriter sw = new StreamWriter(completePath);
for (int i = 0; i < this.faces.Count; i++)
{
string s = this.coords[this.faces[i].v1].ToString();
s += " " + this.coords[this.faces[i].v2].ToString();
s += " " + this.coords[this.faces[i].v3].ToString();
sw.WriteLine(s);
}
sw.Close();
}
}
}