public static double UnitsPerPixel(Viewport3D viewport, Base3DElement targetModel)
{
Matrix3D matrix3D1 = Matrix3D.Identity;
Base3DElement base3Delement = targetModel.Parent as Base3DElement;
if (base3Delement != null)
{
matrix3D1 = base3Delement.GetComputedTransformFromViewport3DToElement();
}
Point3D point3D = matrix3D1.Transform(new Point3D(0.0, 0.0, 0.0));
double num = (matrix3D1.Transform(new Point3D(0.1, 0.1, 0.1)) - point3D).Length / 0.1;
Matrix3D matrix3D2 = targetModel.Transform.Value * matrix3D1;
Point3D targetPoint = new Point3D(matrix3D2.OffsetX, matrix3D2.OffsetY, matrix3D2.OffsetZ);
return(Helper3D.UnitsPerPixel(viewport, targetPoint) / num);
}
protected void RecomputeTransform()
{
AdornerSet3DContainer adornerSet3Dcontainer = this.adornerSet3DContainer;
Viewport3D viewport = (Viewport3D)this.Element.Viewport.ViewObject.PlatformSpecificObject;
Matrix3D viewport3DtoElement = this.Element.GetComputedTransformFromViewport3DToElement();
Point3D point = new Point3D();
if (this.DoCenterOnSpecifiedCenter)
{
point = (CanonicalTransform3D)this.Element.Transform.Center;
}
Matrix3D source = viewport3DtoElement;
source.TranslatePrepend((Vector3D)point);
if (this.DoRemoveObjectScale)
{
Matrix3D rotation = new Matrix3D();
Vector3D scale = new Vector3D();
Matrix3DOperations.DecomposeIntoRotationAndScale(source, out rotation, out scale);
rotation.OffsetX = source.OffsetX;
rotation.OffsetY = source.OffsetY;
rotation.OffsetZ = source.OffsetZ;
source = rotation;
}
if (this.adornmentLayer == AdornerSet3D.Location.OrthographicLayer && adornerSet3Dcontainer.ShadowAdorningViewport3D.Camera is ProjectionCamera)
{
OrthographicCamera ortho = (OrthographicCamera)adornerSet3Dcontainer.OrthographicAdorningViewport3D.Camera;
Point3D point3D = AdornedToolBehavior3D.ProjectionPoint3DTranslatedToMatchingOrthographicPosition(viewport, viewport3DtoElement, ortho, point);
source.OffsetX = point3D.X;
source.OffsetY = point3D.Y;
source.OffsetZ = point3D.Z;
}
Point3D targetPoint = new Point3D(source.OffsetX, source.OffsetY, source.OffsetZ);
if (this.DoScaleToScreen)
{
double num1 = this.adornmentLayer != AdornerSet3D.Location.OrthographicLayer || !(adornerSet3Dcontainer.ShadowAdorningViewport3D.Camera is ProjectionCamera) ? Helper3D.UnitsPerPixel(viewport, targetPoint) * AdornerSet3D.PixelsPerInch : 6.0 / (this.AdornerSet3DContainer.AdornedViewport.GetComputedTightBounds().Width / 96.0);
Matrix rotation;
Vector scale;
Matrix3DOperations.DecomposeIntoRotationAndScale(ElementUtilities.GetComputedTransform((Visual)viewport, (Visual)(this.View.ViewModel.DefaultView.ViewRoot.PlatformSpecificObject as FrameworkElement)), out rotation, out scale);
double x = scale.X;
double zoom = this.View.Zoom;
double num2 = num1 / zoom * x;
double offsetX = -targetPoint.X * num2 + targetPoint.X;
double offsetY = -targetPoint.Y * num2 + targetPoint.Y;
double offsetZ = -targetPoint.Z * num2 + targetPoint.Z;
Matrix3D matrix3D = new Matrix3D(num2, 0.0, 0.0, 0.0, 0.0, num2, 0.0, 0.0, 0.0, 0.0, num2, 0.0, offsetX, offsetY, offsetZ, 1.0);
((MatrixTransform3D)this.adornerSetVisual.Transform).Matrix = source * matrix3D;
}
else
{
((MatrixTransform3D)this.adornerSetVisual.Transform).Matrix = source;
}
}