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Gallery / Re: learning program.
« Last post by vknw123 on May 19, 2013, 02:17:01 AM »
Recent Posts
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Questions & Troubleshooting / Re: Need Help making Watertight
« Last post by Darque1 on May 15, 2013, 02:33:38 AM »Hi, thanks for the great replies. I will give your suggestions a go. Sorry for the late response - got distracted by the 3d printer.
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Gallery / Re: learning program.
« Last post by vknw123 on May 13, 2013, 01:00:55 PM »Used three programs.
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Questions & Troubleshooting / Re: Need Help making Watertight
« Last post by RMS on May 11, 2013, 02:21:03 PM »ugh...there must be a better way than this =)
Will try to spend some time with this file when I get the chance. Maybe there is a way to make this easier.
Will try to spend some time with this file when I get the chance. Maybe there is a way to make this easier.
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Questions & Troubleshooting / Re: Need Help making Watertight
« Last post by MagWeb on May 11, 2013, 03:25:42 AM »Hey welcome in Europe - hope the bad wifi isn´t your only experience here!
(imagine two close by surfaces with inverse normals and connected via Bridge/Handle )
You are right, up to a certain degree a highly set CreaseAngle (75+) acts similar. As long as your mesh is pretty smooth that works fine.
But on the other hand, that makes it hard to get regions with narrow cavities or structured topology of the first surface selected. One could expand the selection X-times until there are no holes in the selection any more and shrink it X-times again...
I tried another thing (I often use to get rid of self intersections) that may be used for such a problem too: I inverted the normals of the whole mesh (in Meshlab). Now in MM/Select with AllowBackFaces disabled I tried to select the second skin which is of FrontFaces now (use transparent material) . This works as long there´s a possibiliy to get in touch with it . Means there has to be a self intersection - otherwise backfaces block the SelectBrush. Now one can set the CreaseAngle pretty high and Erase. Due to the highly set CreaseAngle there still may be some isolated surfaces of the inner shell but those can easily be removed:
Invert the normals again.
Select a piece of the first skin and expand ("E") to connected. Invert selection and delete the result.
(imagine two close by surfaces with inverse normals and connected via Bridge/Handle )
You are right, up to a certain degree a highly set CreaseAngle (75+) acts similar. As long as your mesh is pretty smooth that works fine.
But on the other hand, that makes it hard to get regions with narrow cavities or structured topology of the first surface selected. One could expand the selection X-times until there are no holes in the selection any more and shrink it X-times again...
I tried another thing (I often use to get rid of self intersections) that may be used for such a problem too: I inverted the normals of the whole mesh (in Meshlab). Now in MM/Select with AllowBackFaces disabled I tried to select the second skin which is of FrontFaces now (use transparent material) . This works as long there´s a possibiliy to get in touch with it . Means there has to be a self intersection - otherwise backfaces block the SelectBrush. Now one can set the CreaseAngle pretty high and Erase. Due to the highly set CreaseAngle there still may be some isolated surfaces of the inner shell but those can easily be removed:
Invert the normals again.
Select a piece of the first skin and expand ("E") to connected. Invert selection and delete the result.
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Questions & Troubleshooting / Re: Need Help making Watertight
« Last post by RMS on May 10, 2013, 02:31:55 PM »I can't see this file because I am on terrible hotel wifi in Europe...but MagWeb wouldn't it be possible to do something similar in meshmixer with the angle threshold in the selection tool?
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Questions & Troubleshooting / Re: Need Help making Watertight
« Last post by MagWeb on May 10, 2013, 01:16:32 PM »You're right, your mesh owns no holes but a second skin with normals oriented inverse.
MM does not have a tool to repair such a second skin connected to the first easily.
The best way to fix that I found until now:
Meshlab owns a Paint tool (brush icon). In this tool there is a brush selection tool (Icon: Brush with a red tip).
Clicking on it you can set it to paint (= select) on backfaces or hidden faces. Disable both checkboxes.
Now, you may use a pretty big brush size, paint all the regions of your first skin (these regions will become red if selection rendering is enabled : Toggle icon with a diagonal red stripe in the main tool bar).
Now invert your selection (Filters/selection/InvertSelection)
Erase the inverted selection (crossed face+vertices icon in the main toolbar)
Now you should got rid of your second skin and got "true" holes that can be fixed by MM's Anaysis/inspector.
@RMS: Such a restriction to exlude hidden tris would be a multi-useful feature for the SelectMode (as an option in the tool properties "Allow Hidden Faces")
MM does not have a tool to repair such a second skin connected to the first easily.
The best way to fix that I found until now:
Meshlab owns a Paint tool (brush icon). In this tool there is a brush selection tool (Icon: Brush with a red tip).
Clicking on it you can set it to paint (= select) on backfaces or hidden faces. Disable both checkboxes.
Now, you may use a pretty big brush size, paint all the regions of your first skin (these regions will become red if selection rendering is enabled : Toggle icon with a diagonal red stripe in the main tool bar).
Now invert your selection (Filters/selection/InvertSelection)
Erase the inverted selection (crossed face+vertices icon in the main toolbar)
Now you should got rid of your second skin and got "true" holes that can be fixed by MM's Anaysis/inspector.
@RMS: Such a restriction to exlude hidden tris would be a multi-useful feature for the SelectMode (as an option in the tool properties "Allow Hidden Faces")
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Bug Reports / Re: Parts library display problem
« Last post by RMS on May 06, 2013, 11:46:18 AM »I have nearly finished a new way to handle these icons, which will avoid these problems. It happens because each time you load the program, the part meshes are being rendered off-screen, and that doesn't work on some GPUs.
One thing you could try is seeing if you have a dual-GPU system, and if so forcing it to use the discrete (ie fast) GPU. That has helped in other threads: http://meshmixer.com/forum/index.php?topic=1570.msg3056#msg3056
Otherwise, you will have to wait...but a fix is coming!
One thing you could try is seeing if you have a dual-GPU system, and if so forcing it to use the discrete (ie fast) GPU. That has helped in other threads: http://meshmixer.com/forum/index.php?topic=1570.msg3056#msg3056
Otherwise, you will have to wait...but a fix is coming!
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Questions & Troubleshooting / Re: Need Help making Watertight
« Last post by Darque1 on May 06, 2013, 04:18:38 AM »Hi Philo,
Thanks for the reply, it took me a while to find the attach file option - Doh. I had to decimate the mesh a fair bit to make it small enough to upload.
I played with the file some more and found if I remove the mesh around the lip and inside the hole the program will fill the hole. It seems as though the mesh is double skinned so the program thinks it is watertight.
Basically I want to be able to get to the stage of being able to print the scans but at the moment that is along way off.
Any advice is much appreciated.
Thanks for the reply, it took me a while to find the attach file option - Doh. I had to decimate the mesh a fair bit to make it small enough to upload.
I played with the file some more and found if I remove the mesh around the lip and inside the hole the program will fill the hole. It seems as though the mesh is double skinned so the program thinks it is watertight.
Basically I want to be able to get to the stage of being able to print the scans but at the moment that is along way off.
Any advice is much appreciated.
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Bug Reports / Re: Parts library display problem
« Last post by tstusr on May 05, 2013, 02:20:19 PM »same here.
Fresh meshmixer08 installation on new machine (Windos 7, 32bit).
Reinstall did not help.
Any ideas?
Fresh meshmixer08 installation on new machine (Windos 7, 32bit).
Reinstall did not help.
Any ideas?