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using System;
using System.IO;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using OpenSim.Region.Physics.Manager;
namespace OpenSim.Region.Physics.Meshing
{
public class Mesh : IMesh
{
public List<Vertex> vertices;
public List<Triangle> triangles;
public float[] normals;
public Mesh()
{
vertices = new List<Vertex>();
triangles = new List<Triangle>();
}
public Mesh Clone()
{
Mesh result = new Mesh();
foreach (Vertex v in vertices)
{
if (v == null)
result.vertices.Add(null);
else
result.vertices.Add(v.Clone());
}
foreach (Triangle t in triangles)
{
int iV1, iV2, iV3;
iV1 = this.vertices.IndexOf(t.v1);
iV2 = this.vertices.IndexOf(t.v2);
iV3 = this.vertices.IndexOf(t.v3);
Triangle newT = new Triangle(result.vertices[iV1], result.vertices[iV2], result.vertices[iV3]);
result.Add(newT);
}
return result;
}
public void Add(Triangle triangle)
{
int i;
i = vertices.IndexOf(triangle.v1);
if (i < 0)
throw new ArgumentException("Vertex v1 not known to mesh");
i = vertices.IndexOf(triangle.v2);
if (i < 0)
throw new ArgumentException("Vertex v2 not known to mesh");
i = vertices.IndexOf(triangle.v3);
if (i < 0)
throw new ArgumentException("Vertex v3 not known to mesh");
triangles.Add(triangle);
}
public void Add(Vertex v)
{
vertices.Add(v);
}
public void Remove(Vertex v)
{
int i;
// First, remove all triangles that are build on v
for (i = 0; i < triangles.Count; i++)
{
Triangle t = triangles[i];
if (t.v1 == v || t.v2 == v || t.v3 == v)
{
triangles.RemoveAt(i);
i--;
}
}
// Second remove v itself
vertices.Remove(v);
}
public void RemoveTrianglesOutside(SimpleHull hull)
{
int i;
for (i = 0; i < triangles.Count; i++)
{
Triangle t = triangles[i];
Vertex v1 = t.v1;
Vertex v2 = t.v2;
Vertex v3 = t.v3;
PhysicsVector m = v1 + v2 + v3;
m /= 3.0f;
if (!hull.IsPointIn(new Vertex(m)))
{
triangles.RemoveAt(i);
i--;
}
}
}
public void Add(List<Vertex> lv)
{
foreach (Vertex v in lv)
{
vertices.Add(v);
}
}
public List<PhysicsVector> getVertexList()
{
List<PhysicsVector> result = new List<PhysicsVector>();
foreach (Vertex v in vertices)
{
result.Add(v);
}
return result;
}
public float[] getVertexListAsFloatLocked()
{
float[] result = new float[vertices.Count * 3];
for (int i = 0; i < vertices.Count; i++)
{
Vertex v = vertices[i];
if (v == null)
continue;
result[3 * i + 0] = v.X;
result[3 * i + 1] = v.Y;
result[3 * i + 2] = v.Z;
}
GCHandle.Alloc(result, GCHandleType.Pinned);
return result;
}
public int[] getIndexListAsInt()
{
int[] result = new int[triangles.Count * 3];
for (int i = 0; i < triangles.Count; i++)
{
Triangle t = triangles[i];
result[3 * i + 0] = vertices.IndexOf(t.v1);
result[3 * i + 1] = vertices.IndexOf(t.v2);
result[3 * i + 2] = vertices.IndexOf(t.v3);
}
return result;
}
public int[] getIndexListAsIntLocked()
{
int[] result = getIndexListAsInt();
GCHandle.Alloc(result, GCHandleType.Pinned);
return result;
}
public void Append(Mesh newMesh)
{
foreach (Vertex v in newMesh.vertices)
vertices.Add(v);
foreach (Triangle t in newMesh.triangles)
Add(t);
}
// Do a linear transformation of mesh.
public void TransformLinear(float[,] matrix, float[] offset)
{
foreach (Vertex v in vertices)
{
if (v == null)
continue;
float x, y, z;
x = v.X * matrix[0, 0] + v.Y * matrix[1, 0] + v.Z * matrix[2, 0];
y = v.X * matrix[0, 1] + v.Y * matrix[1, 1] + v.Z * matrix[2, 1];
z = v.X * matrix[0, 2] + v.Y * matrix[1, 2] + v.Z * matrix[2, 2];
v.X = x + offset[0];
v.Y = y + offset[1];
v.Z = z + offset[2];
}
}
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);
foreach (Triangle t in triangles)
{
String s = t.ToStringRaw();
sw.WriteLine(s);
}
sw.Close();
}
}
}
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