protected virtual void TraceObjectFileName(IObjWriterState state, StreamWriter writer)
{
if (!string.IsNullOrEmpty(state.Obj.TraceObjectFileName))
{
writer.Write(string.Format(CultureInfo.InvariantCulture, "trace_obj {0}\n", state.Obj.TraceObjectFileName));
}
}
protected virtual void SurfaceConnection(IObjWriterState state, StreamWriter writer)
{
foreach (var con in state.Obj.SurfaceConnections)
{
writer.WriteLine("con {0} {1} {2} {3}", con.Surface1.ToString(CultureInfo.InvariantCulture), con.Curve2D1.ToString(), con.Surface2.ToString(CultureInfo.InvariantCulture), con.Curve2D2.ToString());
}
}
protected virtual void VertexNormals(IObjWriterState state, StreamWriter writer)
{
foreach (var vertex in state.Obj.VertexNormals)
{
writer.WriteLine("vn {0} {1} {2}", vertex.X.ToString("F6", CultureInfo.InvariantCulture), vertex.Y.ToString("F6", CultureInfo.InvariantCulture), vertex.Z.ToString("F6", CultureInfo.InvariantCulture));;
}
}
protected virtual void Vertices(IObjWriterState state, StreamWriter writer)
{
foreach (var vertex in state.Obj.Vertices)
{
var position = vertex.Position;
if (vertex.Color != default)
{
var color = vertex.Color;
if (color.W == 1.0f)
{
writer.WriteLine("v {0} {1} {2} {3} {4} {5}", position.X.ToString("F6", CultureInfo.InvariantCulture), position.Y.ToString("F6", CultureInfo.InvariantCulture), position.Z.ToString("F6", CultureInfo.InvariantCulture), color.X.ToString("F6", CultureInfo.InvariantCulture), color.Y.ToString("F6", CultureInfo.InvariantCulture), color.Z.ToString("F6", CultureInfo.InvariantCulture));
}
else
{
writer.WriteLine("v {0} {1} {2} {3} {4} {5} {6}", position.X.ToString("F6", CultureInfo.InvariantCulture), position.Y.ToString("F6", CultureInfo.InvariantCulture), position.Z.ToString("F6", CultureInfo.InvariantCulture), color.X.ToString("F6", CultureInfo.InvariantCulture), color.Y.ToString("F6", CultureInfo.InvariantCulture), color.Z.ToString("F6", CultureInfo.InvariantCulture), color.W.ToString("F6", CultureInfo.InvariantCulture));
}
}
else
{
if (position.W == 1.0f)
{
writer.WriteLine("v {0} {1} {2}", position.X.ToString("F6", CultureInfo.InvariantCulture), position.Y.ToString("F6", CultureInfo.InvariantCulture), position.Z.ToString("F6", CultureInfo.InvariantCulture));
}
else
{
writer.WriteLine("v {0} {1} {2} {3}", position.X.ToString("F6", CultureInfo.InvariantCulture), position.Y.ToString("F6", CultureInfo.InvariantCulture), position.Z.ToString("F6", CultureInfo.InvariantCulture), position.W.ToString("F6", CultureInfo.InvariantCulture));
}
}
}
}
protected virtual void AttributesOfPolygonalElement(IObjWriterState state, PolygonalElement element, StreamWriter writer)
{
if (element.SmoothingGroupNumber != state.SmoothingGroupNumber)
{
state.SmoothingGroupNumber = element.SmoothingGroupNumber;
writer.WriteLine(state.SmoothingGroupNumber == 0 ? "s off" : string.Format("s {0}", state.SmoothingGroupNumber));
}
if (element.IsBevelInterpolationEnabled != state.IsBevelInterpolationEnabled)
{
state.IsBevelInterpolationEnabled = element.IsBevelInterpolationEnabled;
writer.WriteLine(state.IsBevelInterpolationEnabled ? "bevel on": "bevel off");
}
if (element.IsColorInterpolationEnabled != state.IsColorInterpolationEnabled)
{
state.IsColorInterpolationEnabled = element.IsColorInterpolationEnabled;
writer.WriteLine(state.IsColorInterpolationEnabled ? "c_interp on" : "c_interp off");
}
if (element.IsDissolveInterpolationEnabled != state.IsDissolveInterpolationEnabled)
{
state.IsDissolveInterpolationEnabled = element.IsDissolveInterpolationEnabled;
writer.WriteLine(state.IsDissolveInterpolationEnabled ? "d_interp on" : "d_interp off");
}
}
protected virtual void AttributesOfElement(IObjWriterState state, Element element, StreamWriter writer)
{
if (element.ObjectName != state.ObjectName)
{
state.ObjectName = element.ObjectName;
writer.WriteLine(string.IsNullOrEmpty(state.ObjectName) ? "o" : string.Format("o {0}", state.ObjectName));
}
if (element.LevelOfDetail != state.LevelOfDetail)
{
state.LevelOfDetail = element.LevelOfDetail;
writer.WriteLine("lod {0}", state.LevelOfDetail);
}
if (element.MapName != state.MapName)
{
state.MapName = element.MapName;
writer.WriteLine(string.IsNullOrEmpty(state.MapName) ? "usemap off" : string.Format("usemap {0}", state.MapName));
}
if (element.MaterialName != state.MaterialName)
{
state.MaterialName = element.MaterialName;
writer.WriteLine(string.IsNullOrEmpty(state.MaterialName) ? "usemtl off" : string.Format("usemtl {0}", state.MaterialName));
}
}
protected virtual void GroupNames <T>(IObjWriterState state, StreamWriter writer, T element, Func <Group, IList <T> > func) where T : Element
{
var groupNames = GetGroupNames(state, element, func);
if (groupNames != state.GroupNames)
{
state.GroupNames = groupNames;
writer.WriteLine(string.IsNullOrEmpty(groupNames) ? "g default" : string.Format("g {0}", groupNames));
}
}
protected virtual void Header(IObjWriterState stater, StreamWriter writer)
{
if (string.IsNullOrEmpty(stater.Obj.Header))
{
return;
}
foreach (var line in stater.Obj.Header.Split('\n'))
{
writer.WriteLine("#{0}", line);
}
}
protected virtual string GetGroupNames <T>(IObjWriterState state, T element, Func <Group, IList <T> > func) where T : Element
{
var result = new List <string>();
foreach (var group in state.Obj.Groups)
{
if (func(group).Contains(element))
{
result.Add(group.Name);
}
}
return(string.Join(" ", result));
}
protected virtual void MaterialLibraries(IObjWriterState state, StreamWriter writer)
{
if (state.Obj.MaterialLibraries.Count == 0)
{
return;
}
writer.Write("mtllib");
foreach (var map in state.Obj.MaterialLibraries)
{
writer.Write(" {0}", map);
}
writer.WriteLine();
}
protected virtual void Lines(IObjWriterState state, StreamWriter writer)
{
foreach (var line in state.Obj.Lines)
{
GroupNames(state, writer, line, g => g.Lines);
AttributesOfElement(state, line, writer);
AttributesOfPolygonalElement(state, line, writer);
writer.Write("l");
foreach (var vertex in line.Vertices)
{
writer.Write(" {0}", vertex);
}
writer.WriteLine();
}
}
protected virtual void Points(IObjWriterState state, StreamWriter writer)
{
foreach (var point in state.Obj.Points)
{
GroupNames(state, writer, point, g => g.Points);
AttributesOfElement(state, point, writer);
AttributesOfPolygonalElement(state, point, writer);
writer.Write("p");
foreach (var vertex in point.Vertices)
{
writer.Write(" {0}", vertex);
}
writer.WriteLine();
}
}
protected virtual void Curves(IObjWriterState state, StreamWriter writer)
{
foreach (var curve in state.Obj.Curves)
{
GroupNames(state, writer, curve, g => g.Curves);
AttributesOfElement(state, curve, writer);
AttributesOfFreeFormElement(state, curve, writer);
writer.Write("curv {0} {1}", curve.Start.ToString("F6", CultureInfo.InvariantCulture), curve.End.ToString("F6", CultureInfo.InvariantCulture));
foreach (var vertex in curve.Vertices)
{
writer.Write(" {0}", vertex);
}
writer.WriteLine();
FreeFormElement(state, curve, writer);
}
}
protected virtual void Curves2D(IObjWriterState state, StreamWriter writer)
{
foreach (var curve in state.Obj.Curves2D)
{
GroupNames(state, writer, curve, g => g.Curves2D);
AttributesOfElement(state, curve, writer);
AttributesOfFreeFormElement(state, curve, writer);
writer.Write("curv2");
foreach (var vertex in curve.SpaceVertices)
{
writer.Write(" {0}", vertex);
}
writer.WriteLine();
FreeFormElement(state, curve, writer);
}
}
protected virtual void Surfaces(IObjWriterState state, StreamWriter writer)
{
foreach (var surface in state.Obj.Surfaces)
{
GroupNames(state, writer, surface, g => g.Surfaces);
AttributesOfElement(state, surface, writer);
AttributesOfFreeFormElement(state, surface, writer);
writer.Write("surf {0} {1} {2} {3}", surface.StartU.ToString("F6", CultureInfo.InvariantCulture), surface.EndU.ToString("F6", CultureInfo.InvariantCulture), surface.StartV.ToString("F6", CultureInfo.InvariantCulture), surface.EndV.ToString("F6", CultureInfo.InvariantCulture));
foreach (var vertex in surface.Vertices)
{
writer.Write(" {0}", vertex);
}
writer.WriteLine();
FreeFormElement(state, surface, writer);
}
}
protected virtual void ParameterSpaceVertices(IObjWriterState state, StreamWriter writer)
{
foreach (var vertex in state.Obj.SpaceVertices)
{
if (vertex.Z == 1.0f)
{
if (vertex.Y == 0.0f)
{
writer.WriteLine("vp {0}", vertex.X.ToString("F6", CultureInfo.InvariantCulture));
}
else
{
writer.WriteLine("vp {0} {1}", vertex.X.ToString("F6", CultureInfo.InvariantCulture), vertex.Y.ToString("F6", CultureInfo.InvariantCulture));
}
}
else
{
writer.WriteLine("vp {0} {1} {2}", vertex.X.ToString("F6", CultureInfo.InvariantCulture), vertex.Y.ToString("F6", CultureInfo.InvariantCulture), vertex.Z.ToString("F6", CultureInfo.InvariantCulture));
}
}
}
protected virtual void AttributesOfFreeFormElement(IObjWriterState state, FreeFormElement element, StreamWriter writer)
{
if (element.MergingGroupNumber != state.MergingGroupNumber)
{
state.MergingGroupNumber = element.MergingGroupNumber;
writer.WriteLine(state.MergingGroupNumber == 0 ? "mg off" : string.Format("mg {0} {1}", state.MergingGroupNumber, state.Obj.MergingGroupResolutions[state.MergingGroupNumber].ToString("F6", CultureInfo.InvariantCulture)));
}
switch (element.FreeFormType)
{
case FreeFormType.BasisMatrix:
{
writer.Write("cstype");
if (element.IsRationalForm)
{
writer.Write(" rat");
}
writer.WriteLine(" bmatrix");
break;
}
case FreeFormType.Bezier:
{
writer.Write("cstype");
if (element.IsRationalForm)
{
writer.Write(" rat");
}
writer.WriteLine(" bezier");
break;
}
case FreeFormType.BSpline:
{
writer.Write("cstype");
if (element.IsRationalForm)
{
writer.Write(" rat");
}
writer.WriteLine(" bspline");
break;
}
case FreeFormType.Cardinal:
{
writer.Write("cstype");
if (element.IsRationalForm)
{
writer.Write(" rat");
}
writer.WriteLine(" cardinal");
break;
}
case FreeFormType.Taylor:
{
writer.Write("cstype");
if (element.IsRationalForm)
{
writer.Write(" rat");
}
writer.WriteLine(" taylor");
break;
}
}
writer.WriteLine(element.DegreeV == 0
? string.Format("deg {0}", element.DegreeU)
: string.Format("deg {0} {1}", element.DegreeU, element.DegreeV));
if (element.BasicMatrixU != default)
{
writer.Write("bmat u");
foreach (var value in element.BasicMatrixU)
{
writer.Write(" {0}", value.ToString("F6", CultureInfo.InvariantCulture));
}
writer.WriteLine();
}
if (element.BasicMatrixV != default)
{
writer.Write("bmat v");
foreach (var value in element.BasicMatrixV)
{
writer.Write(" {0}", value.ToString("F6", CultureInfo.InvariantCulture));
}
writer.WriteLine();
}
writer.WriteLine(element.StepV == 1.0f
? string.Format("step {0}", element.StepU.ToString("F6", CultureInfo.InvariantCulture))
: string.Format("step {0} {1}", element.StepU.ToString("F6", CultureInfo.InvariantCulture), element.StepV.ToString("F6", CultureInfo.InvariantCulture)));
if (element.CurveApproximationTechnique != default)
{
if (element.CurveApproximationTechnique is ConstantParametricSubDivisionTechnique)
{
var technique = (ConstantParametricSubDivisionTechnique)element.CurveApproximationTechnique;
writer.WriteLine("ctech cparm {0}", technique.ResolutionU.ToString("F6", CultureInfo.InvariantCulture));
}
else if (element.CurveApproximationTechnique is ConstantSpatialSubDivisionTechnique)
{
var technique = (ConstantSpatialSubDivisionTechnique)element.CurveApproximationTechnique;
writer.WriteLine("ctech cspace {0}", technique.MaximumLength.ToString("F6", CultureInfo.InvariantCulture));
}
else if (element.CurveApproximationTechnique is CurvatureDependentSubDivisionTechnique)
{
var technique = (CurvatureDependentSubDivisionTechnique)element.CurveApproximationTechnique;
writer.WriteLine("ctech curv {0} {1}", technique.MaximumDistance.ToString("F6", CultureInfo.InvariantCulture), technique.MaximumAngle.ToString("F6", CultureInfo.InvariantCulture));
}
}
if (element.SurfaceApproximationTechnique != default)
{
if (element.SurfaceApproximationTechnique is ConstantParametricSubDivisionTechnique)
{
var technique = (ConstantParametricSubDivisionTechnique)element.SurfaceApproximationTechnique;
if (technique.ResolutionU == technique.ResolutionV)
{
writer.WriteLine("stech cparmb {0}", technique.ResolutionU.ToString("F6", CultureInfo.InvariantCulture));
}
else
{
writer.WriteLine("stech cparma {0} {1}", technique.ResolutionU.ToString("F6", CultureInfo.InvariantCulture), technique.ResolutionV.ToString("F6", CultureInfo.InvariantCulture));
}
}
else if (element.SurfaceApproximationTechnique is ConstantSpatialSubDivisionTechnique)
{
var technique = (ConstantSpatialSubDivisionTechnique)element.SurfaceApproximationTechnique;
writer.WriteLine("stech cspace {0}", technique.MaximumLength.ToString("F6", CultureInfo.InvariantCulture));
}
else if (element.SurfaceApproximationTechnique is CurvatureDependentSubDivisionTechnique)
{
var technique = (CurvatureDependentSubDivisionTechnique)element.SurfaceApproximationTechnique;
writer.WriteLine("stech curv {0} {1}", technique.MaximumDistance.ToString("F6", CultureInfo.InvariantCulture), technique.MaximumAngle.ToString("F6", CultureInfo.InvariantCulture));
}
}
}
protected virtual void FreeFormElement(IObjWriterState state, FreeFormElement element, StreamWriter writer)
{
var writeEnd = false;
if (element.U.Count != 0)
{
writeEnd = true;
writer.Write("parm u");
foreach (var value in element.U)
{
writer.Write(" {0}", value.ToString("F6", CultureInfo.InvariantCulture));
}
writer.WriteLine();
}
if (element.V.Count != 0)
{
writeEnd = true;
writer.Write("parm v");
foreach (var value in element.V)
{
writer.Write(" {0}", value.ToString("F6", CultureInfo.InvariantCulture));
}
writer.WriteLine();
}
if (element.OuterTrimmingCurves.Count != 0)
{
writeEnd = true;
writer.Write("trim");
foreach (var index in element.OuterTrimmingCurves)
{
writer.Write(" {0}", index);
}
writer.WriteLine();
}
if (element.InnerTrimmingCurves.Count != 0)
{
writeEnd = true;
writer.Write("hole");
foreach (var index in element.InnerTrimmingCurves)
{
writer.Write(" {0}", index);
}
writer.WriteLine();
}
if (element.SequenceCurves.Count != 0)
{
writeEnd = true;
writer.Write("scrv");
foreach (var index in element.SequenceCurves)
{
writer.Write(" {0}", index);
}
writer.WriteLine();
}
if (element.SpecialPoints.Count != 0)
{
writeEnd = true;
writer.Write("sp");
foreach (var point in element.SpecialPoints)
{
writer.Write(" {0}", point);
}
writer.WriteLine();
}
if (writeEnd)
{
writer.WriteLine("end");
}
}