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