/// <summary>
/// Calculates the insertion rotation matrix.
/// </summary>
/// <param name="insertionUnits">The insertion units.</param>
/// <returns>The insert transformation matrix.</returns>
public Matrix3 GetTransformation(DrawingUnits insertionUnits)
{
double docScale = UnitHelper.ConversionFactor(this.Block.Record.Units, insertionUnits);
Matrix3 trans = MathHelper.ArbitraryAxis(this.Normal);
trans *= Matrix3.RotationZ(this.rotation * MathHelper.DegToRad);
trans *= Matrix3.Scale(this.scale * docScale);
return(trans);
}
/// <summary>
/// Calculates the insertion rotation matrix.
/// </summary>
/// <returns>The insert transformation matrix.</returns>
/// <remarks>
/// This method uses the DefaultInsUnits defined by the Insert class to obtain the scale between the drawing and the block units.
/// Additionally, if the insert belongs to a block the units to use are the ones defined in the BlockRecord,
/// and if the insert belongs to a layout the units to use are the ones defined in the document drawing variable InsUnits.
/// </remarks>
public Matrix3 GetTransformation()
{
DrawingUnits insUnits;
if (this.Owner == null)
{
insUnits = DefaultInsUnits;
}
else
{
insUnits = this.Owner.Record.Layout == null ? this.Owner.Record.Units : this.Owner.Record.Owner.Owner.DrawingVariables.InsUnits;
}
double docScale = UnitHelper.ConversionFactor(this.Block.Record.Units, insUnits);
Matrix3 trans = MathHelper.ArbitraryAxis(this.Normal);
trans *= Matrix3.RotationZ(this.rotation * MathHelper.DegToRad);
trans *= Matrix3.Scale(this.scale * docScale);
return(trans);
}
/// <summary>
/// Recalculate the attributes position, normal, rotation, text height, width factor, and oblique angle from the values applied to the insertion.
/// </summary>
/// <remarks>
/// Changes to the insert, the block, or the document insertion units will require this method to be called manually.<br />
/// The attributes position, normal, rotation, text height, width factor, and oblique angle values includes the transformations applied to the insertion,
/// if required this method will calculate the proper values according to the ones defined by the attribute definition.<br />
/// All the attribute values can be changed manually independently to its definition,
/// but, usually, you will want them to be transformed with the insert based on the local values defined by the attribute definition.<br />
/// This method only applies to attributes that have a definition, some dxf files might generate attributes that have no definition in the block.<br />
/// At the moment the attribute width factor and oblique angle are not calculated, this is applied to inserts with non uniform scaling.
/// </remarks>
public void TransformAttributes()
{
// if the insert does not contain attributes there is nothing to do
if (this.attributes.Count == 0)
{
return;
}
DrawingUnits insUnits;
if (this.Owner == null)
{
insUnits = DrawingUnits.Unitless;
}
else
{
// if the insert belongs to a block the units to use are the ones defined in the BlockRecord
// if the insert belongs to a layout the units to use are the ones defined in the Document
insUnits = this.Owner.Record.Layout == null ? this.Owner.Record.Units : this.Owner.Record.Owner.Owner.DrawingVariables.InsUnits;
}
Vector3 insScale = this.scale * UnitHelper.ConversionFactor(this.block.Record.Units, insUnits);
Matrix3 insTrans = this.GetTransformation(insUnits);
foreach (Attribute att in this.attributes)
{
AttributeDefinition attdef = att.Definition;
if (attdef == null)
{
continue;
}
Vector3 wcsAtt = insTrans * (attdef.Position - this.block.Origin);
att.Position = this.position + wcsAtt;
Vector2 txtU = new Vector2(attdef.WidthFactor, 0.0);
txtU = MathHelper.Transform(txtU, attdef.Rotation * MathHelper.DegToRad, CoordinateSystem.Object, CoordinateSystem.World);
Vector3 ocsTxtU = MathHelper.Transform(new Vector3(txtU.X, txtU.Y, 0.0), attdef.Normal, CoordinateSystem.Object, CoordinateSystem.World);
Vector3 wcsTxtU = insTrans * ocsTxtU;
Vector2 txtV = new Vector2(0.0, attdef.Height);
txtV = MathHelper.Transform(txtV, attdef.Rotation * MathHelper.DegToRad, CoordinateSystem.Object, CoordinateSystem.World);
Vector3 ocsTxtV = MathHelper.Transform(new Vector3(txtV.X, txtV.Y, 0.0), attdef.Normal, CoordinateSystem.Object, CoordinateSystem.World);
Vector3 wcsTxtV = insTrans * ocsTxtV;
Vector3 txtNormal = Vector3.CrossProduct(wcsTxtU, wcsTxtV);
att.Normal = txtNormal;
double txtHeight = MathHelper.PointLineDistance(wcsTxtV, Vector3.Zero, Vector3.Normalize(wcsTxtU));
att.Height = txtHeight;
double txtAng = Vector2.Angle(new Vector2(txtU.X * insScale.X, txtU.Y * insScale.Y)) * MathHelper.RadToDeg;
if (Vector3.Equals(attdef.Normal, Vector3.UnitZ))
{
att.Rotation = this.rotation + txtAng;
//double txtWidth = MathHelper.PointLineDistance(wcsTxtU, Vector3.Zero, Vector3.Normalize(wcsTxtV));
//att.WidthFactor = txtWidth;
att.WidthFactor = attdef.WidthFactor;
//double a1d1Ang = Vector2.Angle(new Vector2(txtV.X * insScale.X, txtV.Y * insScale.Y)) * MathHelper.RadToDeg;
//double oblique = 90 - (a1d1Ang - txtAng);
//if (oblique < -85.0 || oblique > 85.0) oblique = Math.Sign(oblique) * 85;
//att.ObliqueAngle = oblique;
att.ObliqueAngle = attdef.ObliqueAngle;
}
else
{
att.Rotation = txtAng;
att.WidthFactor = attdef.WidthFactor;
att.ObliqueAngle = attdef.ObliqueAngle;
}
}
}
