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Deleting Excess Mesh Points

Graeme Barr
Newcomer
Hi,
I am new to this excellent site.
After years of working with AC I just found that one can delete excess mesh points! I have often created too many points in a mesh and had to keep all points not knowing how to delete. I would then assign heights to the extra points to make them fit the site profile.
Dragging the extra mesh point outside of the site mesh and dropping seems to delete the points.
This does not seem to be in the AC manuals....or have I missed it?
Graeme Barr
Architect
AC6-17 Imac 3.1 8GB RAM AMD Radeon Graphics HD OSX Yosemite and a PC.
12 REPLIES 12

Karl Ottenstein
Moderator
Graeme wrote:
After years of working with AC I just found that one can delete excess mesh points! I have often created too many points in a mesh and had to keep all points not knowing how to delete. I would then assign heights to the extra points to make them fit the site profile.
Dragging the extra mesh point outside of the site mesh and dropping seems to delete the points.
This does not seem to be in the AC manuals....or have I missed it?
Welcome, Graeme.

This is a new one to me, and would be a great tip if I could get it to work! I'm wondering if it works only with certain mesh points. I just tried to drag an 'extra' mesh point from the middle of a contour as shown in the attached image. Where the rubber band lines crossed the mesh boundary, I ended up with two new points, and the original single contour became two separate ones. I hope I'm doing something wrong, as what you describe would be nice. What I do now to delete a point is to drag it onto an adjacent point.

Thanks,
Karl
One of the forum moderators   •   AC 25 USA and earlier   •   MacOS 11.6, iMac Pro

Graeme Barr
Newcomer
Hi Karl,
The difference is my points are not linked along a contour. I gave up using the magic wand for site levels for this reason, ie that all points are linked.
I like to add points to a mesh often along a contour, but not linked by the magic wand. These points can then be moved around independently and placed along buildings so that finished levels can be created. Also with the edge levels correct around the mesh placing points within the mesh are then averaged between site levels which can be useful.
I suggest setting up a simple mesh, placing some points within the mesh by clicking with the mouse, and then dragging a point outside the mesh and hopefully watch them disappear. I hope it isnt just a fluke of nature/AC on the site I currently working on (which is complex and convoluted).
Regards,
Graeme Barr
Architect
AC6-17 Imac 3.1 8GB RAM AMD Radeon Graphics HD OSX Yosemite and a PC.

Karl Ottenstein
Moderator
Graeme wrote:
I suggest setting up a simple mesh, placing some points within the mesh by clicking with the mouse, and then dragging a point outside the mesh and hopefully watch them disappear.
Hmm. Must be something new to me ... I don't see any way to add a point not connected to a contour by clicking inside a mesh with the mouse. I can only draw closed shapes or contours to get new points ... or add a new point to an existing contour ... and then they are attached to a contour and I cannot drag them off the mesh without the problem noted earlier.

Puzzling.

Karl
One of the forum moderators   •   AC 25 USA and earlier   •   MacOS 11.6, iMac Pro

Graeme Barr
Newcomer
Karl Ottenstein wrote: I don't see any way to add a point not connected to a contour by clicking inside a mesh with the mouse.
The meshes I create have "User Defined Ridges" selected in the dialogue box. Then after a simple mesh is created say a 4 sided rectangle then select the mesh/select the mesh tool/left double click with the mouse within the mesh itself/a dialogue box comes up asking "Add New Points" or "Create Hole"......select "Add New Points"/ also select "Fit to User Ridges"/a new mesh point is then created/select the edge of the mesh/the new point will be then displayed as a dot/this new point can then be selected by a left mouse click/pet pallette comes up and it can be moved or height set/try moving around or setting the height/can be done in 3D or 2D.
From the manual Page 105 Vol 1, AC 8:
"You may continue developing your mesh later by adding new nodes, polygons and editing elevations later as well. When you add new points or create a hole in a mesh, ArchiCAD offers several ways to define the relationship between the newly created points and existing ones.

When you add points to the selected mesh, in the New Mesh Points dialog box you can choose between adding new points and creating a hole. Located below the two radio buttons, the pop-up menu contains three choices that produce different results.

If you choose Fit to User Ridges, the new points will be placed on the current surface of the Mesh, and only user-defined ridges will keep their height. This method is recommended for renderings."

Hope this helps. I dont know how to post a picture yet but I will if I learn how to do this.

Regards,
Graeme Barr
Architect
AC6-17 Imac 3.1 8GB RAM AMD Radeon Graphics HD OSX Yosemite and a PC.

Karl Ottenstein
Moderator
Graeme wrote:
Then after a simple mesh is created say a 4 sided rectangle then select the mesh/select the mesh tool/left double click with the mouse within the mesh itself/a dialogue box comes up asking "Add New Points" or "Create Hole"......
You originally said 'click'; now you say 'double click'. Neither creates a point for me. I only get the dialogs that you and the manual mention if I drag and create a new rectangle which adds a minimum of 4 new hotspots. (Or, as I wrote before, a new point can be added along an existing contour via the pet pallete.) I'm trying this in 8.1R1...looks like you're in 8R3. Tried it there as well with the same result.

AHA / EUREKA! What you're describing only happens (double clicking to create a point) if the polygonal geometry is selected for the mesh tool. This is a revelation to me.

Finally figured that out after reading for the 10th time the part of the manual on adding new points that starts "Draw an open line or a closed polygon..." ... and with rectangular geometry selected, only rectangles could be drawn ... so of course, polygonal geometry would allow drawing of lines. The manual talks about double clicking the last point of the line, but doesn't mention that you could simply double click.

Am I the only one that didn't know this, or should we nominate Graeme for a tip: both the creation of single mesh points, and their deletion (by dragging off the mesh)?

Thanks, Graeme!

Karl
One of the forum moderators   •   AC 25 USA and earlier   •   MacOS 11.6, iMac Pro

Graeme Barr
Newcomer

Pleased it worked for you Karl. AC is a complex program with many features and no doubt you and others will be able assist me with my difficulties in the future.

Regards,
Graeme Barr
Architect
AC6-17 Imac 3.1 8GB RAM AMD Radeon Graphics HD OSX Yosemite and a PC.

dorebe
Newcomer
Over 11 years later and you guys just made my life sooooo much easier. Someone should make this into a tutorial video. Editing meshes have been the bane of my Archicad work. But I think you guys just changed that!! Cheers!
Brad Doré
Residential Designer
Vancouver BC
iMac 2021 132GB

Doug66
Newcomer
As a new user and student - I've been trying to delete nodes from the mesh, I stumbled on this post.

After some thought - I realised that the nodes where grouped.

Where I highlighted the mesh, selected the contour and ungrouped it. Where upon I was then able to complete the process Karl described in which you simply drag the node off the mesh to remove it.

Also you can then select the final polyline on the mesh if needed and delete it.

marietta516
Newcomer
Another way is to drag a point in mesh on top of another point.. seems to work.

artisttheking
Newcomer
Found this ancient post and wanted to add a tip in case someone comes looking with the similar question on how to delete individual mesh points.

In addition to the methods mentioned before you can delete mesh points, ridges or holes in the mesh without dragging or other similar manipulations:
1.) Make sure the mesh tool is active.
2.) Select the mesh.
3.) Right click on the point you wish to delete. The mouse context menu will appear.
4.) Press escape once to close the mouse menu. Now you have mesh still selected but only the point (or hole) active and pressing backspace will delete just that point leaving the rest of the mesh intact.

Same procedure allows you to delete holes from slabs or roofs etc.
AC18 // Windows 7 Professional // CPU Intel 4/8 I7-4770 3.4GHz // RAM DDR3 Kingston HyperX blu 16GB 1600MHz // GPU HP NVIDIA Quadro K2000 2GB GDDR5 // SSD SATA2.5" 180GB // HDD WD CAVIAR BLACK 1TB 3.5" SATA3.

Podolsky
Newcomer
Well, you can do it even much easier - just select the single point (that is not connected with another points), make sure that only the point is selected and not the whole mesh - and press delete. How to select the only point - first select the whole mesh and after click again - but only on the point - black dots on the mesh counter will disappear, showing only one black dot.
The same way you can delete connected points - make sure that only they are selected and press delete.

Podolsky
Newcomer
I think it worked this way since Mesh was introduced in ArchiCAD 6.0
I just realised - how many people didn't know that for how many years!

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