acc521bcdb
git-svn-id: http://libopenmetaverse.googlecode.com/svn/libopenmetaverse/trunk@3280 52acb1d6-8a22-11de-b505-999d5b087335
456 lines
21 KiB
C#
456 lines
21 KiB
C#
/* Copyright (c) 2008 Robert Adams
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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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* * The name of the copyright holder may not 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 AUTHORS 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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* Portions of this code are:
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* Copyright (c) Contributors, http://idealistviewer.org
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* The basic logic of the extrusion code is based on the Idealist viewer code.
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* The Idealist viewer is licensed under the three clause BSD license.
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*/
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/*
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* MeshmerizerR class implments OpenMetaverse.Rendering.IRendering interface
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* using PrimMesher (http://forge.opensimulator.org/projects/primmesher).
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* The faceted mesh returned is made up of separate face meshes.
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* There are a few additions/changes:
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* GenerateSimpleMesh() does not generate anything. Use the other mesher for that.
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* ShouldScaleMesh property sets whether the mesh should be sized up or down
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* based on the prim scale parameters. If turned off, the mesh will not be
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* scaled thus allowing the scaling to happen in the graphics library
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* GenerateScupltMesh() does what it says: takes a bitmap and returns a mesh
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* based on the RGB coordinates in the bitmap.
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* TransformTexCoords() does regular transformations but does not do planier
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* mapping of textures.
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*/
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Text;
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using OMV = OpenMetaverse;
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using OMVR = OpenMetaverse.Rendering;
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namespace OpenMetaverse.Rendering
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{
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/// <summary>
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/// Meshing code based on the Idealist Viewer (20081213).
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/// </summary>
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[RendererName("MeshmerizerR")]
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public class MeshmerizerR : OMVR.IRendering
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{
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// If this is set to 'true' the returned mesh will be scaled by the prim's scaling
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// parameters. Otherwise the mesh is a unit mesh and needs scaling elsewhere.
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private bool m_shouldScale = true;
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public bool ShouldScaleMesh { get { return m_shouldScale; } set { m_shouldScale = value; } }
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/// <summary>
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/// Generates a basic mesh structure from a primitive
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/// </summary>
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/// <param name="prim">Primitive to generate the mesh from</param>
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/// <param name="lod">Level of detail to generate the mesh at</param>
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/// <returns>The generated mesh</returns>
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public OMVR.SimpleMesh GenerateSimpleMesh(OMV.Primitive prim, OMVR.DetailLevel lod)
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{
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return null;
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}
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/// <summary>
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/// Generates a a series of faces, each face containing a mesh and
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/// metadata
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/// </summary>
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/// <param name="prim">Primitive to generate the mesh from</param>
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/// <param name="lod">Level of detail to generate the mesh at</param>
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/// <returns>The generated mesh</returns >
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public OMVR.FacetedMesh GenerateFacetedMesh(OMV.Primitive prim, OMVR.DetailLevel lod)
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{
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OMV.Primitive.ConstructionData primData = prim.PrimData;
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int sides = 4;
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int hollowsides = 4;
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float profileBegin = primData.ProfileBegin;
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float profileEnd = primData.ProfileEnd;
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bool isSphere = false;
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if ((OMV.ProfileCurve)(primData.profileCurve & 0x07) == OMV.ProfileCurve.Circle)
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{
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switch (lod)
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{
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case OMVR.DetailLevel.Low:
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sides = 6;
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break;
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case OMVR.DetailLevel.Medium:
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sides = 12;
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break;
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default:
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sides = 24;
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break;
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}
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}
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else if ((OMV.ProfileCurve)(primData.profileCurve & 0x07) == OMV.ProfileCurve.EqualTriangle)
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sides = 3;
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else if ((OMV.ProfileCurve)(primData.profileCurve & 0x07) == OMV.ProfileCurve.HalfCircle)
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{
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// half circle, prim is a sphere
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isSphere = true;
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switch (lod)
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{
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case OMVR.DetailLevel.Low:
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sides = 6;
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break;
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case OMVR.DetailLevel.Medium:
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sides = 12;
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break;
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default:
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sides = 24;
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break;
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}
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profileBegin = 0.5f * profileBegin + 0.5f;
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profileEnd = 0.5f * profileEnd + 0.5f;
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}
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if ((OMV.HoleType)primData.ProfileHole == OMV.HoleType.Same)
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hollowsides = sides;
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else if ((OMV.HoleType)primData.ProfileHole == OMV.HoleType.Circle)
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{
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switch (lod)
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{
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case OMVR.DetailLevel.Low:
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hollowsides = 6;
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break;
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case OMVR.DetailLevel.Medium:
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hollowsides = 12;
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break;
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default:
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hollowsides = 24;
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break;
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}
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}
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else if ((OMV.HoleType)primData.ProfileHole == OMV.HoleType.Triangle)
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hollowsides = 3;
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PrimMesher.PrimMesh newPrim = new PrimMesher.PrimMesh(sides, profileBegin, profileEnd, (float)primData.ProfileHollow, hollowsides);
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newPrim.viewerMode = true;
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newPrim.holeSizeX = primData.PathScaleX;
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newPrim.holeSizeY = primData.PathScaleY;
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newPrim.pathCutBegin = primData.PathBegin;
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newPrim.pathCutEnd = primData.PathEnd;
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newPrim.topShearX = primData.PathShearX;
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newPrim.topShearY = primData.PathShearY;
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newPrim.radius = primData.PathRadiusOffset;
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newPrim.revolutions = primData.PathRevolutions;
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newPrim.skew = primData.PathSkew;
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switch (lod)
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{
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case OMVR.DetailLevel.Low:
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newPrim.stepsPerRevolution = 6;
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break;
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case OMVR.DetailLevel.Medium:
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newPrim.stepsPerRevolution = 12;
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break;
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default:
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newPrim.stepsPerRevolution = 24;
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break;
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}
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if ((primData.PathCurve == OMV.PathCurve.Line) || (primData.PathCurve == OMV.PathCurve.Flexible))
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{
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newPrim.taperX = 1.0f - primData.PathScaleX;
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newPrim.taperY = 1.0f - primData.PathScaleY;
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newPrim.twistBegin = (int)(180 * primData.PathTwistBegin);
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newPrim.twistEnd = (int)(180 * primData.PathTwist);
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newPrim.ExtrudeLinear();
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}
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else
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{
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newPrim.taperX = primData.PathTaperX;
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newPrim.taperY = primData.PathTaperY;
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newPrim.twistBegin = (int)(360 * primData.PathTwistBegin);
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newPrim.twistEnd = (int)(360 * primData.PathTwist);
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newPrim.ExtrudeCircular();
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}
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int numViewerFaces = newPrim.viewerFaces.Count;
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int numPrimFaces = newPrim.numPrimFaces;
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for (uint i = 0; i < numViewerFaces; i++)
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{
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PrimMesher.ViewerFace vf = newPrim.viewerFaces[(int)i];
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if (isSphere)
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{
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vf.uv1.U = (vf.uv1.U - 0.5f) * 2.0f;
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vf.uv2.U = (vf.uv2.U - 0.5f) * 2.0f;
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vf.uv3.U = (vf.uv3.U - 0.5f) * 2.0f;
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}
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}
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if (m_shouldScale)
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{
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newPrim.Scale(prim.Scale.X, prim.Scale.Y, prim.Scale.Z);
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}
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// copy the vertex information into OMVR.IRendering structures
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OMVR.FacetedMesh omvrmesh = new OMVR.FacetedMesh();
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omvrmesh.Faces = new List<OMVR.Face>();
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omvrmesh.Prim = prim;
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omvrmesh.Profile = new OMVR.Profile();
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omvrmesh.Profile.Faces = new List<OMVR.ProfileFace>();
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omvrmesh.Profile.Positions = new List<OMV.Vector3>();
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omvrmesh.Path = new OMVR.Path();
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omvrmesh.Path.Points = new List<OMVR.PathPoint>();
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Dictionary<OMV.Vector3, int> vertexAccount = new Dictionary<OMV.Vector3, int>();
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for (int ii = 0; ii < numPrimFaces; ii++)
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{
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OMVR.Face oface = new OMVR.Face();
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oface.Vertices = new List<OMVR.Vertex>();
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oface.Indices = new List<ushort>();
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oface.TextureFace = prim.Textures.GetFace((uint)ii);
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int faceVertices = 0;
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vertexAccount.Clear();
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OMV.Vector3 pos;
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int indx;
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OMVR.Vertex vert;
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foreach (PrimMesher.ViewerFace vface in newPrim.viewerFaces)
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{
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if (vface.primFaceNumber == ii)
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{
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faceVertices++;
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pos = new OMV.Vector3(vface.v1.X, vface.v1.Y, vface.v1.Z);
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if (vertexAccount.ContainsKey(pos))
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{
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// we aleady have this vertex in the list. Just point the index at it
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oface.Indices.Add((ushort)vertexAccount[pos]);
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}
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else
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{
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// the vertex is not in the list. Add it and the new index.
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vert = new OMVR.Vertex();
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vert.Position = pos;
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vert.TexCoord = new OMV.Vector2(vface.uv1.U, 1.0f - vface.uv1.V);
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vert.Normal = new OMV.Vector3(vface.n1.X, vface.n1.Y, vface.n1.Z);
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oface.Vertices.Add(vert);
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indx = oface.Vertices.Count - 1;
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vertexAccount.Add(pos, indx);
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oface.Indices.Add((ushort)indx);
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}
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pos = new OMV.Vector3(vface.v2.X, vface.v2.Y, vface.v2.Z);
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if (vertexAccount.ContainsKey(pos))
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{
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oface.Indices.Add((ushort)vertexAccount[pos]);
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}
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else
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{
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vert = new OMVR.Vertex();
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vert.Position = pos;
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vert.TexCoord = new OMV.Vector2(vface.uv2.U, 1.0f - vface.uv2.V);
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vert.Normal = new OMV.Vector3(vface.n2.X, vface.n2.Y, vface.n2.Z);
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oface.Vertices.Add(vert);
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indx = oface.Vertices.Count - 1;
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vertexAccount.Add(pos, indx);
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oface.Indices.Add((ushort)indx);
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}
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pos = new OMV.Vector3(vface.v3.X, vface.v3.Y, vface.v3.Z);
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if (vertexAccount.ContainsKey(pos))
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{
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oface.Indices.Add((ushort)vertexAccount[pos]);
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}
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else
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{
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vert = new OMVR.Vertex();
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vert.Position = pos;
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vert.TexCoord = new OMV.Vector2(vface.uv3.U, 1.0f - vface.uv3.V);
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vert.Normal = new OMV.Vector3(vface.n3.X, vface.n3.Y, vface.n3.Z);
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oface.Vertices.Add(vert);
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indx = oface.Vertices.Count - 1;
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vertexAccount.Add(pos, indx);
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oface.Indices.Add((ushort)indx);
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}
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}
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}
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if (faceVertices > 0)
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{
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oface.TextureFace = prim.Textures.FaceTextures[ii];
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if (oface.TextureFace == null)
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{
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oface.TextureFace = prim.Textures.DefaultTexture;
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}
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oface.ID = ii;
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omvrmesh.Faces.Add(oface);
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}
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}
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return omvrmesh;
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}
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/// <summary>
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/// Create a sculpty faceted mesh. The actual scuplt texture is fetched and passed to this
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/// routine since all the context for finding teh texture is elsewhere.
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/// </summary>
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/// <param name="scupltTexture"></param>
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/// <param name="prim"></param>
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/// <param name="lod"></param>
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/// <returns>the faceted mesh or null if can't do it</returns>
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public OMVR.FacetedMesh GenerateSculptMesh(System.Drawing.Bitmap scupltTexture,
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OMV.Primitive prim, OMVR.DetailLevel lod)
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{
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byte sculptType = (byte)prim.Sculpt.Type;
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bool mirror = ((sculptType & 128) != 0);
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bool invert = ((sculptType & 64) != 0);
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// mirror = false; // TODO: libomv doesn't support these and letting them flop around causes problems
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// invert = false;
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OMV.SculptType omSculptType = (OMV.SculptType)(sculptType & 0x07);
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PrimMesher.SculptMesh.SculptType smSculptType;
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switch (omSculptType)
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{
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case OpenMetaverse.SculptType.Cylinder:
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smSculptType = PrimMesher.SculptMesh.SculptType.cylinder;
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break;
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case OpenMetaverse.SculptType.Plane:
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smSculptType = PrimMesher.SculptMesh.SculptType.plane;
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break;
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case OpenMetaverse.SculptType.Sphere:
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smSculptType = PrimMesher.SculptMesh.SculptType.sphere;
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break;
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case OpenMetaverse.SculptType.Torus:
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smSculptType = PrimMesher.SculptMesh.SculptType.torus;
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break;
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default:
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smSculptType = PrimMesher.SculptMesh.SculptType.plane;
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break;
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}
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// The lod for sculpties is the resolution of the texture passed.
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// The first guess is 1:1 then lower resolutions after that
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// int mesherLod = (int)Math.Sqrt(scupltTexture.Width * scupltTexture.Height);
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int mesherLod = 32; // number used in Idealist viewer
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switch (lod)
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{
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case OMVR.DetailLevel.Highest:
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break;
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case OMVR.DetailLevel.High:
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break;
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case OMVR.DetailLevel.Medium:
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mesherLod /= 2;
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break;
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case OMVR.DetailLevel.Low:
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mesherLod /= 4;
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break;
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}
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PrimMesher.SculptMesh newMesh =
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new PrimMesher.SculptMesh(scupltTexture, smSculptType, mesherLod, true, mirror, invert);
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if (ShouldScaleMesh)
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{
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newMesh.Scale(prim.Scale.X, prim.Scale.Y, prim.Scale.Z);
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}
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int numPrimFaces = 1; // a scuplty has only one face
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// copy the vertex information into OMVR.IRendering structures
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OMVR.FacetedMesh omvrmesh = new OMVR.FacetedMesh();
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omvrmesh.Faces = new List<OMVR.Face>();
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omvrmesh.Prim = prim;
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omvrmesh.Profile = new OMVR.Profile();
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omvrmesh.Profile.Faces = new List<OMVR.ProfileFace>();
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omvrmesh.Profile.Positions = new List<OMV.Vector3>();
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omvrmesh.Path = new OMVR.Path();
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omvrmesh.Path.Points = new List<OMVR.PathPoint>();
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for (int ii = 0; ii < numPrimFaces; ii++)
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{
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OMVR.Face oface = new OMVR.Face();
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oface.Vertices = new List<OMVR.Vertex>();
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oface.Indices = new List<ushort>();
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oface.TextureFace = prim.Textures.GetFace((uint)ii);
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int faceVertices = 0;
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foreach (PrimMesher.ViewerFace vface in newMesh.viewerFaces)
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{
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OMVR.Vertex vert = new OMVR.Vertex();
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vert.Position = new OMV.Vector3(vface.v1.X, vface.v1.Y, vface.v1.Z);
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vert.TexCoord = new OMV.Vector2(vface.uv1.U, 1.0f - vface.uv1.V);
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vert.Normal = new OMV.Vector3(vface.n1.X, vface.n1.Y, vface.n1.Z);
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oface.Vertices.Add(vert);
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vert = new OMVR.Vertex();
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vert.Position = new OMV.Vector3(vface.v2.X, vface.v2.Y, vface.v2.Z);
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vert.TexCoord = new OMV.Vector2(vface.uv2.U, 1.0f - vface.uv2.V);
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vert.Normal = new OMV.Vector3(vface.n2.X, vface.n2.Y, vface.n2.Z);
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oface.Vertices.Add(vert);
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vert = new OMVR.Vertex();
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vert.Position = new OMV.Vector3(vface.v3.X, vface.v3.Y, vface.v3.Z);
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vert.TexCoord = new OMV.Vector2(vface.uv3.U, 1.0f - vface.uv3.V);
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vert.Normal = new OMV.Vector3(vface.n3.X, vface.n3.Y, vface.n3.Z);
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oface.Vertices.Add(vert);
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oface.Indices.Add((ushort)(faceVertices * 3 + 0));
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oface.Indices.Add((ushort)(faceVertices * 3 + 1));
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oface.Indices.Add((ushort)(faceVertices * 3 + 2));
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faceVertices++;
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}
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if (faceVertices > 0)
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{
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oface.TextureFace = prim.Textures.FaceTextures[ii];
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if (oface.TextureFace == null)
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{
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oface.TextureFace = prim.Textures.DefaultTexture;
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}
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oface.ID = ii;
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omvrmesh.Faces.Add(oface);
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}
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}
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return omvrmesh;
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}
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/// <summary>
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/// Apply texture coordinate modifications from a
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/// <seealso cref="TextureEntryFace"/> to a list of vertices
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/// </summary>
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/// <param name="vertices">Vertex list to modify texture coordinates for</param>
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/// <param name="center">Center-point of the face</param>
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/// <param name="teFace">Face texture parameters</param>
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public void TransformTexCoords(List<OMVR.Vertex> vertices, OMV.Vector3 center, OMV.Primitive.TextureEntryFace teFace)
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{
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// compute trig stuff up front
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float cosineAngle = (float)Math.Cos(teFace.Rotation);
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float sinAngle = (float)Math.Sin(teFace.Rotation);
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// need a check for plainer vs default
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// just do default for now (I don't know what planar is)
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for (int ii = 0; ii < vertices.Count; ii++)
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{
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// tex coord comes to us as a number between zero and one
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// transform about the center of the texture
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|
OMVR.Vertex vert = vertices[ii];
|
|
float tX = vert.TexCoord.X - 0.5f;
|
|
float tY = vert.TexCoord.Y - 0.5f;
|
|
// rotate, scale, offset
|
|
vert.TexCoord.X = (tX * cosineAngle + tY * sinAngle) * teFace.RepeatU + teFace.OffsetU + 0.5f;
|
|
vert.TexCoord.Y = (-tX * sinAngle + tY * cosineAngle) * teFace.RepeatV + teFace.OffsetV + 0.5f;
|
|
vertices[ii] = vert;
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
} |