protected virtual void SP(IObjReaderState state, ObjToken token, string[] values)
{
if (state.FreeFormElement == default)
{
return;
}
if (values.Length < 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify at least 1 value. Line: {1}.", token, state.LineNumber));
}
for (int i = 1; i < values.Length; i++)
{
var vp = int.Parse(values[i], CultureInfo.InvariantCulture);
if (vp == 0)
{
throw new InvalidDataException(string.Format("The <{0}> statement contains an invalid parameter space vertex index. Line: {1}.", token, state.LineNumber));
}
if (vp < 0)
{
vp = state.Obj.SpaceVertices.Count + vp + 1;
}
if (vp <= 0 || vp > state.Obj.SpaceVertices.Count)
{
throw new IndexOutOfRangeException();
}
state.FreeFormElement.SpecialPoints.Add(vp);
}
}
protected virtual void Surf(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 6)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify at least 5 values. Line: {1}.", token, state.LineNumber));
}
var surface = new Surface()
{
StartU = float.Parse(values[1], CultureInfo.InvariantCulture),
EndU = float.Parse(values[2], CultureInfo.InvariantCulture),
StartV = float.Parse(values[3], CultureInfo.InvariantCulture),
EndV = float.Parse(values[4], CultureInfo.InvariantCulture)
};
for (int i = 5; i < values.Length; i++)
{
surface.Vertices.Add(Triplet(state, token, values[i]));
}
state.ApplyAttributesToElement(surface);
state.ApplyAttributesToFreeFormElement(surface);
state.FreeFormElement = surface;
state.Obj.Surfaces.Add(surface);
foreach (var group in state.GetCurrentGroups())
{
group.Surfaces.Add(surface);
}
}
protected virtual Triplet Triplet(IObjReaderState state, ObjToken token, string value)
{
var values = value.Split('/');
if (values.Length > 3)
{
throw new InvalidDataException(string.Format("The <{0}> has too many values. Line: {1}.", token, state.LineNumber));
}
var v = !string.IsNullOrEmpty(values[0]) ? int.Parse(values[0], CultureInfo.InvariantCulture) : 0;
if (v == 0)
{
throw new InvalidDataException(string.Format("The <{0}> must specify a vertex index. Line: {1}.", token, state.LineNumber));
}
if (v < 0)
{
v = state.Obj.Vertices.Count + v + 1;
}
if (v <= 0 || v > state.Obj.Vertices.Count)
{
throw new IndexOutOfRangeException();
}
var vt = values.Length > 1 && !string.IsNullOrEmpty(values[1]) ? int.Parse(values[1], CultureInfo.InvariantCulture) : 0;
if (vt != 0)
{
if (vt < 0)
{
vt = state.Obj.TextureVertices.Count + vt + 1;
}
if (vt <= 0 || vt > state.Obj.TextureVertices.Count)
{
throw new IndexOutOfRangeException();
}
}
var vn = values.Length > 2 && !string.IsNullOrEmpty(values[2]) ? int.Parse(values[2], CultureInfo.InvariantCulture) : 0;
if (vn != 0)
{
if (vn < 0)
{
vn = state.Obj.VertexNormals.Count + vn + 1;
}
if (vn <= 0 || vn > state.Obj.VertexNormals.Count)
{
throw new IndexOutOfRangeException();
}
}
return(new Triplet(v, vt, vn));
}
protected virtual void Con(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 9)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify 8 values. Line: {1}.", token, state.LineNumber));
}
if (values.Length != 9)
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many values. Line: {1}.", token, state.LineNumber));
}
var surface1 = int.Parse(values[1], CultureInfo.InvariantCulture);
if (surface1 == 0)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify a surface index. Line: {1}.", token, state.LineNumber));
}
if (surface1 < 0)
{
surface1 = state.Obj.Surfaces.Count + surface1 + 1;
}
if (surface1 <= 0 || surface1 > state.Obj.Surfaces.Count)
{
throw new IndexOutOfRangeException();
}
var curve1 = CurveIndex(state, values, 2);
var surface2 = int.Parse(values[5], CultureInfo.InvariantCulture);
if (surface2 == 0)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify a surface index. Line: {1}.", token, state.LineNumber));
}
if (surface2 < 0)
{
surface2 = state.Obj.Surfaces.Count + surface2 + 1;
}
if (surface2 <= 0 || surface2 > state.Obj.Surfaces.Count)
{
throw new IndexOutOfRangeException();
}
var curve2 = CurveIndex(state, values, 6);
state.Obj.SurfaceConnections.Add(new SurfaceConnection
{
Surface1 = surface1,
Curve2D1 = curve1,
Surface2 = surface2,
Curve2D2 = curve2
});
}
protected virtual void Hole(IObjReaderState state, ObjToken token, string[] values)
{
if (state.FreeFormElement == default)
{
return;
}
CurveIndex(state.FreeFormElement.InnerTrimmingCurves, state, token, values);
}
protected virtual void Scrv(IObjReaderState state, ObjToken token, string[] values)
{
if (state.FreeFormElement == default)
{
return;
}
CurveIndex(state.FreeFormElement.SequenceCurves, state, token, values);
}
protected void LOD(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify a value. Line: {1}.", token, state.LineNumber));
}
if (values.Length != 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many values. Line: {1}.", token, state.LineNumber));
}
state.LevelOfDetail = int.Parse(values[1], CultureInfo.InvariantCulture);
}
protected virtual void O(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length == 1)
{
state.ObjectName = default;
return;
}
if (values.Length != 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many values. Line: {1}.", token, state.LineNumber));
}
state.ObjectName = values[1];
}
protected virtual void V(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 4)
{
throw new InvalidDataException(string.Format("The <{0}> statement must have at least 3 values. Line: {1}.", token, state.LineNumber));
}
var x = float.Parse(values[1], CultureInfo.InvariantCulture);
var y = float.Parse(values[2], CultureInfo.InvariantCulture);
var z = float.Parse(values[3], CultureInfo.InvariantCulture);
var w = 1.0f;
var hasColor = false;
var r = 0.0f;
var g = 0.0f;
var b = 0.0f;
var a = 1.0f;
if (values.Length == 4 || values.Length == 5)
{
if (values.Length == 5)
{
w = float.Parse(values[4], CultureInfo.InvariantCulture);
}
}
else if (values.Length == 7 || values.Length == 8)
{
hasColor = true;
r = float.Parse(values[4], CultureInfo.InvariantCulture);
g = float.Parse(values[5], CultureInfo.InvariantCulture);
b = float.Parse(values[6], CultureInfo.InvariantCulture);
if (values.Length == 8)
{
a = float.Parse(values[7], CultureInfo.InvariantCulture);
}
}
else
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many values. Line: {1}.", token, state.LineNumber));
}
state.Obj.Vertices.Add(new Vertex(new XYZW(x, y, z, w))
{
Color = hasColor ? new XYZW(r, g, b, a) : default
});
protected virtual void CurveIndex(IList <CurveIndex> curves, IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 4)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify at least 3 value. Line: {1}.", token, state.LineNumber));
}
if ((values.Length - 1) % 3 != 0)
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many values. Line: {1}.", token, state.LineNumber));
}
for (int i = 1; i < values.Length; i += 3)
{
curves.Add(CurveIndex(state, values, i));
}
}
protected virtual void G(IObjReaderState state, ObjToken token, string[] values)
{
state.GroupNames.Clear();
for (int i = 1; i < values.Length; i++)
{
var name = values[i];
if (!string.Equals(name, "default", StringComparison.OrdinalIgnoreCase))
{
state.GroupNames.Add(name);
}
}
state.GetCurrentGroups();
}
protected virtual void Curv(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 5)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify at least 4 values. Line: {1}.", token, state.LineNumber));
}
var curve = new Curve()
{
Start = float.Parse(values[1], CultureInfo.InvariantCulture),
End = float.Parse(values[2], CultureInfo.InvariantCulture)
};
for (int i = 3; i < values.Length; i++)
{
var v = int.Parse(values[i], CultureInfo.InvariantCulture);
if (v == 0)
{
throw new InvalidDataException(string.Format("The <{0}> statement contains an invalid vertex index. Line: {1}.", token, state.LineNumber));
}
if (v < 0)
{
v = state.Obj.Vertices.Count + v + 1;
}
if (v <= 0 || v > state.Obj.Vertices.Count)
{
throw new IndexOutOfRangeException();
}
curve.Vertices.Add(v);
}
state.ApplyAttributesToElement(curve);
state.ApplyAttributesToFreeFormElement(curve);
state.FreeFormElement = curve;
state.Obj.Curves.Add(curve);
foreach (var group in state.GetCurrentGroups())
{
group.Curves.Add(curve);
}
}
protected virtual void MtlLib(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify a file name. Line: {1}.", token, state.LineNumber));
}
for (int i = 1; i < values.Length; i++)
{
if (!Path.HasExtension(values[1]))
{
throw new InvalidDataException(string.Format("A file name must have an extension. Value: <{0}>. Line: {1}.", values[1], state.LineNumber));
}
state.Obj.MaterialLibraries.Add(values[i]);
}
}
protected virtual void ShadowObj(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify a file name. Line: {1}", token, state.LineNumber));
}
if (values.Length != 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many values. Line: {1}.", token, state.LineNumber));
}
if (!Path.HasExtension(values[1]))
{
throw new InvalidDataException(string.Format("A file name must have an extension. Value: <{0}>. Line: {1}.", values[1], state.LineNumber));
}
state.Obj.ShadowObjectFileName = values[1];
}
protected virtual void DInterp(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify a name. Line: {1}.", token, state.LineNumber));
}
if (values.Length != 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many values. Line: {1}.", token, state.LineNumber));
}
if (!Enum.TryParse <OnOff>(values[1], true, out var onOff))
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify on or off. Line: {1}.", token, state.LineNumber));
}
state.IsDissolveInterpolationEnabled = onOff == OnOff.On;
}
protected virtual void Curv2(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 3)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify at least 2 values. Line: {1}.", token, state.LineNumber));
}
var curve = new Curve2D();
for (int i = 1; i < values.Length; i++)
{
int vp = int.Parse(values[i], CultureInfo.InvariantCulture);
if (vp == 0)
{
throw new InvalidDataException(string.Format("The <{0}> statement contains an invalid parameter space vertex index. Line: {1}.", token, state.LineNumber));
}
if (vp < 0)
{
vp = state.Obj.SpaceVertices.Count + vp + 1;
}
if (vp <= 0 || vp > state.Obj.SpaceVertices.Count)
{
throw new IndexOutOfRangeException();
}
curve.SpaceVertices.Add(vp);
}
state.ApplyAttributesToElement(curve);
state.ApplyAttributesToFreeFormElement(curve);
state.FreeFormElement = curve;
state.Obj.Curves2D.Add(curve);
foreach (var group in state.GetCurrentGroups())
{
group.Curves2D.Add(curve);
}
}
protected virtual void BMat(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify a direction. Line: {1}.", token, state.LineNumber));
}
if (!Enum.TryParse <UV>(values[1], true, out var uv))
{
throw new InvalidDataException(string.Format("The <{0}> statement has an unknown direction. Line: {1}.", token, state.LineNumber));
}
var count = (state.DegreeU + 1) * (state.DegreeV + 1);
if (values.Length != count + 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many or too few values. Line: {1}.", token, state.LineNumber));
}
var matrix = new float[count];
for (int i = 0; i < count; i++)
{
matrix[i] = float.Parse(values[2 + i], CultureInfo.InvariantCulture);
}
switch (uv)
{
case UV.U:
{
state.BasicMatrixU = matrix;
break;
}
case UV.V:
{
state.BasicMatrixV = matrix;
break;
}
}
}
protected virtual void Step(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify at least 1 value. Line: {1}.", token, state.LineNumber));
}
if (values.Length == 2)
{
state.StepU = float.Parse(values[1], CultureInfo.InvariantCulture);
state.StepV = 1.0f;
}
else if (values.Length == 3)
{
state.StepU = float.Parse(values[1], CultureInfo.InvariantCulture);
state.StepV = float.Parse(values[2], CultureInfo.InvariantCulture);
}
else
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many values. Line: {1}.", token, state.LineNumber));
}
}
protected virtual void S(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify a value. Line: {1}.", token, state.LineNumber));
}
if (values.Length != 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many values. Line: {1}.", token, state.LineNumber));
}
if (Enum.TryParse <OnOff>(values[1], true, out var onOff))
{
if (onOff == OnOff.Off)
{
state.SmoothingGroupNumber = 0;
return;
}
}
state.SmoothingGroupNumber = int.Parse(values[1], CultureInfo.InvariantCulture);
}
protected virtual void Parm(IObjReaderState state, ObjToken token, string[] values)
{
if (state.FreeFormElement == default)
{
return;
}
if (values.Length < 4)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify at least 3 values. Line: {1}.", token, state.LineNumber));
}
var parameters = default(IList <float>);
if (!Enum.TryParse <UV>(values[1], true, out var uv))
{
throw new InvalidDataException(string.Format("The <{0}> statement has an unknown direction. Line: {1}.", token, state.LineNumber));
}
switch (uv)
{
case UV.U:
{
parameters = state.FreeFormElement.U;
break;
}
case UV.V:
{
parameters = state.FreeFormElement.V;
break;
}
}
for (int i = 2; i < values.Length; i++)
{
parameters.Add(float.Parse(values[i], CultureInfo.InvariantCulture));
}
}
protected virtual void UseMtl(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify a value. Line: {1}.", token, state.LineNumber));
}
if (values.Length != 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many values. Line: {1}.", token, state.LineNumber));
}
if (Enum.TryParse <OnOff>(values[1], true, out var onOff))
{
if (onOff == OnOff.Off)
{
state.MaterialName = default;
return;
}
}
state.MaterialName = values[1];
}
protected virtual void MG(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify a value. Line: {1}.", token, state.LineNumber));
}
if (Enum.TryParse <OnOff>(values[1], true, out var onOff))
{
if (onOff == OnOff.Off)
{
state.MergingGroupNumber = 0;
}
}
else
{
state.MergingGroupNumber = int.Parse(values[1], CultureInfo.InvariantCulture);
}
if (state.MergingGroupNumber == 0)
{
if (values.Length > 3)
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many values. Line: {1}.", token, state.LineNumber));
}
}
else
{
if (values.Length != 3)
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many or too few values. Line: {1}.", token, state.LineNumber));
}
var res = float.Parse(values[2], CultureInfo.InvariantCulture);
state.Obj.MergingGroupResolutions[state.MergingGroupNumber] = res;
}
}
protected virtual CurveIndex CurveIndex(IObjReaderState state, string[] values, int index)
{
var start = float.Parse(values[index], CultureInfo.InvariantCulture);
var end = float.Parse(values[index + 1], CultureInfo.InvariantCulture);
var curve2D = int.Parse(values[index + 2], CultureInfo.InvariantCulture);
if (curve2D == 0)
{
throw new InvalidDataException(string.Format("The curve index must specify an index. Line: {0}.", state.LineNumber));
}
if (curve2D < 0)
{
curve2D = state.Obj.Curves2D.Count + curve2D + 1;
}
if (curve2D <= 0 || curve2D > state.Obj.Curves2D.Count)
{
throw new IndexOutOfRangeException();
}
return(new CurveIndex(start, end, curve2D));
}
protected virtual void P(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify at least 1 value. Line: {1}.", token, state.LineNumber));
}
var point = new Point();
for (int i = 1; i < values.Length; i++)
{
point.Vertices.Add(Triplet(state, token, values[i]));
}
state.ApplyAttributesToElement(point);
state.ApplyAttributesToPolygonalElement(point);
state.Obj.Points.Add(point);
foreach (var group in state.GetCurrentGroups())
{
group.Points.Add(point);
}
}
protected virtual void STech(IObjReaderState state, ObjToken token, string[] values)
{
state.SurfaceApproximationTechnique = ApproximationTechnique(state, token, values);
}
protected virtual void CSType(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify a value. Line: {1}.", token, state.LineNumber));
}
var type = string.Empty;
if (values.Length == 2)
{
state.IsRationalForm = false;
type = values[1];
}
else if (values.Length == 3 && string.Equals(values[1], "rat", StringComparison.OrdinalIgnoreCase))
{
state.IsRationalForm = true;
type = values[2];
}
else
{
throw new InvalidDataException(string.Format("The <{0}> statement has too many values. Line: {1}.", token, state.LineNumber));
}
if (!Enum.TryParse <CurveSurfaceToken>(type, true, out var cstype))
{
throw new InvalidDataException(string.Format("The <{0}> statement has an unknown type value. Value: {1}. Line: {2}.", token, type, state.LineNumber));
}
switch (cstype)
{
case CurveSurfaceToken.BMatrix:
{
state.FreeFormType = FreeFormType.BasisMatrix;
break;
}
case CurveSurfaceToken.Bezier:
{
state.FreeFormType = FreeFormType.Bezier;
break;
}
case CurveSurfaceToken.Bspline:
{
state.FreeFormType = FreeFormType.BSpline;
break;
}
case CurveSurfaceToken.Cardinal:
{
state.FreeFormType = FreeFormType.Cardinal;
break;
}
case CurveSurfaceToken.Taylor:
{
state.FreeFormType = FreeFormType.Taylor;
break;
}
}
}
protected virtual void Res(IObjReaderState state, ObjToken token, string[] values)
{
throw new NotImplementedException(string.Format("The <{0}> statement have been replaced by free-form geometry statements.", token));
}
protected virtual IApproximationTechnique ApproximationTechnique(IObjReaderState state, ObjToken token, string[] values)
{
if (values.Length < 2)
{
throw new InvalidDataException(string.Format("The <{0}> statement must specify a technique. Line: {1}.", token, state.LineNumber));
}
if (!Enum.TryParse <ApproximationTechniqueToken>(values[1], true, out var approximationToken))
{
throw new InvalidDataException(string.Format("The <{0}> statement contains an unknown technique <{1}>.", token, values[1]));
}
switch (approximationToken)
{
case ApproximationTechniqueToken.CParm:
{
if (values.Length < 3)
{
throw new InvalidDataException(string.Format("The <{0}> <{1}> statement must specify a value. Line: {2}.", token, approximationToken, state.LineNumber));
}
if (values.Length != 3)
{
throw new InvalidDataException(string.Format("The <{0}> <{1}> statement has too many values. Line: {2}.", token, approximationToken, state.LineNumber));
}
return(new ConstantParametricSubDivisionTechnique(float.Parse(values[2], CultureInfo.InvariantCulture)));
}
case ApproximationTechniqueToken.CParmA:
{
if (values.Length < 4)
{
throw new InvalidDataException(string.Format("The <{0}> <{1}> statement must specify a value. Line: {2}.", token, approximationToken, state.LineNumber));
}
if (values.Length != 4)
{
throw new InvalidDataException(string.Format("The <{0}> <{1}> statement has too many values. Line: {2}.", token, approximationToken, state.LineNumber));
}
return(new ConstantParametricSubDivisionTechnique(float.Parse(values[2], CultureInfo.InvariantCulture), float.Parse(values[3], CultureInfo.InvariantCulture)));
}
case ApproximationTechniqueToken.CParmB:
{
if (values.Length < 3)
{
throw new InvalidDataException(string.Format("The <{0}> <{1}> statement must specify a value. Line: {2}.", token, approximationToken, state.LineNumber));
}
if (values.Length != 3)
{
throw new InvalidDataException(string.Format("The <{0}> <{1}> statement has too many values. Line: {2}.", token, approximationToken, state.LineNumber));
}
return(new ConstantParametricSubDivisionTechnique(float.Parse(values[2], CultureInfo.InvariantCulture)));
}
case ApproximationTechniqueToken.CSpace:
{
if (values.Length < 3)
{
throw new InvalidDataException(string.Format("The <{0}> <{1}> statement must specify a value. Line: {2}.", token, approximationToken, state.LineNumber));
}
if (values.Length != 3)
{
throw new InvalidDataException(string.Format("The <{0}> <{1}> statement has too many values. Line: {2}.", token, approximationToken, state.LineNumber));
}
return(new ConstantSpatialSubDivisionTechnique(float.Parse(values[2], CultureInfo.InvariantCulture)));
}
case ApproximationTechniqueToken.Curv:
{
if (values.Length < 4)
{
throw new InvalidDataException(string.Format("The <{0}> <{1}> statement must specify a value. Line: {2}.", token, approximationToken, state.LineNumber));
}
if (values.Length != 4)
{
throw new InvalidDataException(string.Format("The <{0}> <{1}> statement has too many values. Line: {2}.", token, approximationToken, state.LineNumber));
}
return(new CurvatureDependentSubDivisionTechnique(float.Parse(values[2], CultureInfo.InvariantCulture), float.Parse(values[3], CultureInfo.InvariantCulture)));
}
}
throw new InvalidDataException(string.Format("The <{0}> statement contains an unknown technique <{1}>.", token, values[1]));
}
protected virtual void End(IObjReaderState state, ObjToken token, string[] values)
{
state.FreeFormElement = default;
}