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By default the Extension TIG-shadowProjector is set to be active when it is first installed, but it may be switched on/off later as desired.
Tools > ShadowProjector > submenu items
New Shadow Projection
1. Select the Face[s] to be processed.
Note that all other Objects in the Selection are ignored.
2. Run the tool from the submenu item.
3. The Options dialog opens.
Choose the Shadow 'Type' from the drop-down list.
'Lines' draws just lines along each shadow's perimeter [the default Type].
'Faces' draws shadows as 'gray' faces, with edges hidden/visible.
'Faces[Edged]' draws shadows as 'gray' faces, edges visible.
'Faces[Edged]%' draws each shadow as a 'gray' face, edges visible, with a text-tag at the center of the 'Shadow' group showing the % of that Face in shade.
'Faces[Edged]%sq…' is similar, but it also appends the Shaded:Total Area, in either ft² or m² depending on your Model Units settings.
In this Options dialog you can also enter a 'Text Height', in current units.
Note that this is only used if a '%' Type is chosen.
The default text-height is 2" or 50mm depending on your Model Units settings.
These Options are remembered with the Model across sessions.
4. OK to continue, Cancel to abort.
Selected Faces that are oriented away from the sun are ignored.
All qualifying Faces are now processed in turn.
All Faces are analyzed for shading, so it is much quicker to Select only those Faces you know to be shaded [or just those which you are interesting in].
Remember that an unshaded Face will take time to analyze and produce no 'Shadow' !
'Shadows' are drawn over the Face showing the extent on any shadows cast on it by all other Faces in the Model [including any within Groups/Components] located between it and the sun.
Note that a Surface's 'Shadows' are processed as separate facets, so it is much quicker to have hidden geometry 'on' and then Select only those Surface Faces which you know to be shaded...
All Faces within the Model that fall within a face's reversed-umbra will be included in any shadow-casting analysis.
Hidden Objects, those on 'off' Layers, Faces with transparent-materials [<70% opacity] - or faces assigned the default-material within a group/instance that itself has a transparent-material [so it displays 'transparent' and casts no shadow] - and Objects with 'casts shadows' unchecked are ignored in the analysis.
Each 'Shadow-Group' is named after the Model's ShadowTime and the Face's ID:
Those with % or %sq have the text-group similarly named, but with those values appended to the name:
The 'Shadow-Groups' are put on a Layer named 'SHAD'.
The 'Shadows' 'gray' material is named 'Shadows'; once it has been made you can change its color/transparency etc as desired.
Any text is colored 'Black'.
Later on the text-group can be moved within the shadow-group for clarity etc.
The text-group goes on a Layer named 'SHAD-TEXT'.
The tool beeps when it has finished processing.
The processing/shadow-group is one step undoable.
Note that if the 'Shadows' have Faces then it is moved 0.1mm off the original Face to avoid 'z-fighting' between surfaces.
Similarly any text-group is slightly offset upwards too to be above the Faces.
It is best to process a few faces at a time because Sketchup slows up almost 'exponentially' as it processes larger collections...
If you process a lot at once be prepared to have lunch and come back when it has done !
Remember that although it might 'white-out', it is still processing.
It is recommended that you keep the Outliner window closed when using this tool, although it can be useful for selecting shadow/text-groups later on.
Shadow Report to File
Writes a report of all Shadows to a txt file.
Shadow Report in Ruby Console
Prints the report in the Ruby Console.
Shadow Options for Model
Opens the Options dialog - this lets you change the settings for that Model without having to run an analysis.
The Options are saved with the Model across sessions.
Opens the Help document.
You can make your own locale translations of the tool's .strings file as your own locale copy.
There are detailed instructions at the start of the standard file:
You can also make a translated copy of the Help .doc file:
Get the latest version from the SCF PluginStore
Just idea : makes the "solid shadow" volume from the object to the ground shadow casted
So that will obtain a funny volume that you can colorize as you want !
So you can calculate its volume for any process
For example compare 2 objects for know what the object who makes the biggest shadow volume!
Or the one who makes the more beauty shadow volume!
Poetic isn't it ?
Or another funny problem of reverse ingeneering
What is the object who create this shadow volume
Is beautiful that please without concept!
Not the same thing, this shows shadows cast on selected faces by objects, I don't have that tool but I think 1001shadows projects all onto the 'ground' [of course if you have a ground-plane face selected my tool does the same]. My tool also has options of displaying the shadows - from a line, to a face, to a face with statistics...
Select the objects you don't want to cast shadows and temporarily group them, then either put the group onto an 'off' layer or hide that group OR simply Edit>Cut the unwanted items. Then do the shadows and the unseen grouped/cut objects are ignored; then unhide the temporary group and explode it OR Edit>PastInPlace to restore the objects ?
That's pretty cool, TIG.
It's as useful as you think up uses for it...
For example, checking the % of solar shading on some selected glazing at a certain Date/Time.
Getting the area [sq'/sqm] of perhaps some selected glazing or a solar-panel that's receiving [or not receiving] direct sunlight...
Because faces using a translucent material don't show normal shadows you can now use this tool to add a visible translucent 'gray' shadow-group face [with no edges] onto selected window-glass etc, to fake these shadows in a Sup render...
DAE files etc don't contain shadow info but you can now include a faced snapshot of the shadows if desired.
I only invented the tool - you lot need to come up with uses for it...
That was exactly what I wanted to experiment: colored glasses and their colored shadows...
Glasses and bottle are drawn , but I can't make to "ShadowProjector" draw their shadows.. Probably too complex shapes.
Is the orange face 'reversed' - view in Monochrome mode to see.
Shadows are only cast onto front faces.
Also there is an issue with tiny faces/holes and groups/instances placed exactly onto a face and casting a shadow.
I'm doing a fix now...
This tool is a great idea ++
I'm very sorry The updated rb doesn't work at all and anymore for me (and the first version is overwrited arghhh!).
Please can you pick an eye on my following SketchUp 7 model ?
Sorry for trouble
I can get it to work with reduced complexity [removing the 'glass']...
I don't have v1.0 either [lost it!]
As I can conclude , ShadowProjector not only take in account the geometry casted by the shadowed selected face, but also the entire geometry of the model.
Alas ShadowProjector is stopped by the first model
PS1: I am not happy to be the one who show the tool limitations
PS: [Plugin] Teapot (1.0.0) — 01 December 2009
You are right.
It would be better/quicker if it found only the objects potentially casting shadows on the face...
BUT the algorithm to do that robustly is beyond me [at the moment].
So at the moment it checks everything that's active for shadow casting even when it doesn't even cast a shadow on the face.
So I suggest that keep the 'active entities' simple [using temporary grouping?] and do small sets of shadows...