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/*
* Copyright (c) Contributors, http://opensimulator.org/
* 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 OpenSim.Region.Physics.Manager;
namespace OpenSim.Region.Physics.Meshing
{
internal class Extruder
{
public float startParameter;
public float stopParameter;
public PhysicsVector size;
public float taperTopFactorX = 1f;
public float taperTopFactorY = 1f;
public float taperBotFactorX = 1f;
public float taperBotFactorY = 1f;
public float pushX = 0f;
public float pushY = 0f;
public Mesh Extrude(Mesh m)
{
startParameter = float.MinValue;
stopParameter = float.MaxValue;
// Currently only works for iSteps=1;
Mesh result = new Mesh();
Mesh workingPlus = m.Clone();
Mesh workingMinus = m.Clone();
foreach (Vertex v in workingPlus.vertices)
{
if (v == null)
continue;
// This is the top
// Set the Z + .5 to match the rest of the scale of the mesh
// Scale it by Size, and Taper the scaling
v.Z = +.5f;
v.X *= (size.X * taperTopFactorX);
v.Y *= (size.Y * taperTopFactorY);
v.Z *= size.Z;
//Push the top of the object over by the Top Shear amount
v.X += pushX * size.X;
v.Y += pushY * size.X;
}
foreach (Vertex v in workingMinus.vertices)
{
if (v == null)
continue;
// This is the bottom
v.Z = -.5f;
v.X *= (size.X * taperBotFactorX);
v.Y *= (size.Y * taperBotFactorY);
v.Z *= size.Z;
}
foreach (Triangle t in workingMinus.triangles)
{
t.invertNormal();
}
result.Append(workingMinus);
result.Append(workingPlus);
int iLastNull = 0;
for (int i = 0; i < workingPlus.vertices.Count; i++)
{
int iNext = (i + 1);
if (workingPlus.vertices[i] == null) // Can't make a simplex here
{
iLastNull = i + 1;
continue;
}
if (i == workingPlus.vertices.Count - 1) // End of list
{
iNext = iLastNull;
}
if (workingPlus.vertices[iNext] == null) // Null means wrap to begin of last segment
{
iNext = iLastNull;
}
Triangle tSide;
tSide = new Triangle(workingPlus.vertices[i], workingMinus.vertices[i], workingPlus.vertices[iNext]);
result.Add(tSide);
tSide =
new Triangle(workingPlus.vertices[iNext], workingMinus.vertices[i], workingMinus.vertices[iNext]);
result.Add(tSide);
}
return result;
}
}
}
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