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&quot;Hole&quot; in cityengine

AnaGalego

I have with troubles to enter private buildings thoroughfares.
the cityengine not assume that those playgrounds are empty. anyone have a solution?

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MatthiasBuehler1

Hi !

I just got some feedback from a developer regarding holes and importing them

( Not 100% all of the above was stated correctly by me)

To clarify: holes are supported with following input formats:
??? CityEngine 2013.1: gdb
??? CityEngine 2014.0: gdb, shp
So if you import footprints with holes into CityEngine 2013.1 we recommend to use the gdb format.

All comments

BenLeslie1

Similarly the offset rule also fills holes in 2014.1 if a negative offset value is used.

Is there a way to procedurally remove this unwanted hole-offset-geometry? comp(f) doesn't seem to have necessary options.

MatthiasBuehler

Ha, good catch ..

Matthias Buehler

Head of 3D Technologies

twitter: @MattB3D

-------------------------------

Garsdale Design Limited

matthias.buehler@garsdaledesign.co.uk

www.garsdaledesign.co.uk

BenLeslie1

I'm on version 2014.1 and have found that the Subdivide tool doesn't work with holes.

See attached - behaviour is the same using shp or gdb.

NathanStocker

Hi Matt,

I've got CE 2014.0 now, but the setback issue is still there that we discussed in this post.

Using the parcels and rule from above, it still gets the results that you attached as '2013.1.jpg' rather than the correct '2014.0.jpg', which maintains the holes in both parcels.

Is there something I'm missing?

Thanks
N

MatthiasBuehler1

it works in CE 2014.1 (current version in development here).

seems this issue will be resolved in the next version.

to support holes properly, we had to touch everything in CGA. thus, this was implemented over multiple releases..

hope you understand ..

matt

NathanStocker

Hi Matt,

The problem is effectively the same as for setback operation discussed below and fixed in CE2014.0.

As an example, the attached green image is a simple extruded parcel, which includes a hole. However when innerRect() is applied to the parcel, it fills in the hole (resulting in the red image).

The red image is the result of this code:

Lot -->
extrude(world.y,5)
innerRect()
color(1,0,0)

Ideally, it would not fill in the hole. Instead it would find the largest possible rectangle within the remaining space.

Nathan

I searched this thread for the innerRect issue .. what do you refer to again with this problem ?

matt

NathanStocker

Hi Matt,

Just wondering about the issue with innerRect() not working on polygons with holes. Is this likely to be fixed soon, or is there a workaround until it is?

This is quite crucial for what we're wanting to use CityEngine for, which is analysing infill capacity (i.e. whether a house will fit in a back yard). I was hoping to do this by using cadastral parcels with buildings cut out, but my rule requires innerRect to get a normal shaped house.

Thanks
Nathan

NathanStocker

I thought that might be the case 🙂
Could you also confirm if the update will also fix the similar problem with innerRect() not taking holes into account?

Thanks
Nate

MatthiasBuehler1

sorry, I cannot promise more than 'soon'..

m.

NathanStocker

Thanks Matt - that's fantastic.
I don't suppose you can give any indication of when 2014 will be released?

MatthiasBuehler1

thanks, this was helpful.

my tests:

2013.1 SR:

[ATTACH=CONFIG]33861[/ATTACH]

2014.0 RC:
[ATTACH=CONFIG]33862[/ATTACH]

So the issue seems fixed. Stay tuned for the release soon.

matt

test.zip

The attached .gdb contains the two parcels from the screenshot - the one which works and the other which doesn't. Looking at them, the obvious difference is that the hole in the one which works extends to the edge of the parcel.

The zip also contains the CGA code, although it's just what I posted previously.

Cheers
N

SetbackParcels.gdb.zip

arekshcApgRImmrpWGS-xls-Map.docx

MatthiasBuehler1

hey !

I believe this should not be.

Can you post this single polygon and the CGA code here, so I can repro here ?

Let me know ..

Matt

NathanStocker

Hi Matt,

Using .gdb did the trick, thanks 🙂

On a related note, I'm having trouble with setback operations on the imported parcels (which have holes from the buildings being cut out). As a simplified example, I've attached a screenshot of the following operation:

Lot -->
Testing1 Testing2

Testing1 -->
color(0,1,0)
extrude(6)

Testing2 -->
setback(3){world.east : NIL | remainder : Testing3}

Testing3 -->
color(1,0,0)
extrude(5)

When I do this, many results (Testing3) fill the hole in as part of the remainder. This is shown in the left parcel of the screenshot, where the red portion is a hole in the original parcel and shouldn't be included in the result.

The parcel on the right has the same rule applied but correctly still excludes the hole.

I'm not sure if this is a remaining issue with holes in imported shapes, or just something with the setback operation.
Is there a way to spatially limit a result to the original shape, so that a result doesn't spill over the boundaries?

Thanks
Nathan

SetbackIssue.jpg

projection.JPG

AleksandarLalovic

Hi Matt,

Sorry for the late responese. I was trying to import shapefiles in 2013 so that was the issue. I guess i will have to wait for 2014 for that.

LeonidKrylov

I've done it, Matthias! By using .gdb. Thank you very much:)

MatthiasBuehler1

Hi !

I just got some feedback from a developer regarding holes and importing them

( Not 100% all of the above was stated correctly by me)

To clarify: holes are supported with following input formats:
??? CityEngine 2013.1: gdb
??? CityEngine 2014.0: gdb, shp
So if you import footprints with holes into CityEngine 2013.1 we recommend to use the gdb format.

MatthiasBuehler1

Hmm.

Interesting ..

Which version of CE are you using ?

Can you post those non-working footprints as e.g. shapeFile or GDB ?

Please let me know ..

Matt

NathanStocker

Hi,

I'm using CityEngine 2013.1 and holes aren't quite working for me either.

I'm importing parcels with the building footprints cut out. For some parcels it works fine (a 'hole' polygon and a surrounding good polygon), but sometimes it doesn't - it creates a hole polygon but the surrounding polygon doesn't have the hole cut out.

The screenshot attached should help explain. The proper polygons are selected and some have vertices around the hole showing the excluded empty area, but others unfortunately include the empty area.

It tends to be that the inner holes are excluded if they touch a boundary, but not if they are entirely within the larger polygon.

Nate

holes.jpg

FeatureLayerViewError.PNG

MatthiasBuehler1

hi !

I tried in CE2013 and it works just fine ..

[ATTACH=CONFIG]33476[/ATTACH]

Let me know ..

m.

hole.jpg

.rar in attach!

Hi,

thanks for the screenshots.. but I need test files too .. 🙂

LeonidKrylov

http://take.ms/5YWu4 ArcScene extrusion
http://take.ms/eWOnC CE 2013.1 extrusion

MatthiasBuehler1

Until CE2012, CityEngine could not interpret holes, thus it created a second shape, with inverted normals.

In 2013, it is supported for shapeFiles and GDB. I'm not sure if it's also working with dxf files.

Alex, can you provide a dxf file with a polygon with a hole ?

AleksandarLalovic

I am experiencing the same problem.

Usually i import DXF files and closed polylines are converted to CE shapes. What usualy happens with the holes is that CE reads it as a second shape. What kind of objects should i export from AutoCAD to preserve the holes?

In VecrorWorks, the same thing hapens both when exporting to DXF or to ShapeFiles, the object with a hole is being impoted as two seperate shapes.

Any ideas?

[ATTACH=CONFIG]33161[/ATTACH]

Untitled-2.jpg

Capture.JPG

MatthiasBuehler1

Hi,

in CE 2013, this should work.

Ana, can you post a shape file or GDB with that specific footprint ?

Let me know ..

matt

LeonidKrylov

It's the only reason we do not use CE in my company. Unfortunately, we had to write Python and Max scripts to export from ArcGIS to 3dsmax. I tested each CE release from 2008 version but every time this problem remains unsolved.

AnaGalego

In arcgis i have image1 but in city i have image2..
i need the hole in center..

2.PNG

1.png

MapError.jpg

while.png

MatthiasBuehler1

Hi,

I'm sorry, but I don't understand what you mean ..

Please post screenshots .. Ok ?

matt

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