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Geom cleanup - what do you use? [message #60241]

Wed, 25 October 2023 12:50

mirek
Messages: 14255
Registered: November 2005

Ultimate Member

Geom package is one of last instances of "old code that needs cleaning / moving to upphub".

There is some very useful code in there, some code that needs polishing and some code that is perhaps too specialised and/or obsolete.

So I have an intention to split Geom, move part to Core (3D geometry stuff mostly, also some geomtric algos like line distance), rest to UppHub.

Before I do, I wanted to ask general community: Which part of Geom do you use?

Mirek

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Re: Geom cleanup - what do you use? [message #60243 is a reply to message #60241]

Wed, 25 October 2023 13:57

koldo
Messages: 3432
Registered: August 2008

Senior Veteran

Hi Mirek

In my case I use geometry.h (to see if a point is inside a polygon) and delaunay.h (to get a triangular mesh from a set of points).

Best regards
Iñaki

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Re: Geom cleanup - what do you use? [message #60265 is a reply to message #60241]

Sat, 28 October 2023 06:56

deep
Messages: 266
Registered: July 2011
Location: Bangalore

Experienced Member

Hi Mirek,

I am using it for various line-line line-arc intersection point calculations.

use geometry.h

Warm Regards

Deepak

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Re: Geom cleanup - what do you use? [message #60272 is a reply to message #60241]

Mon, 30 October 2023 07:59

Tom1
Messages: 1301
Registered: March 2007

Ultimate Contributor

Hi Mirek,

I'm using Matrixf and functions related to that.

Best regards,

Tom

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Re: Geom cleanup - what do you use? [message #60275 is a reply to message #60241]

Mon, 30 October 2023 13:31

Oblivion
Messages: 1202
Registered: August 2007

Senior Contributor

Hi Mirek,

Quote:

So I have an intention to split Geom, move part to Core (3D geometry stuff mostly, also some geomtric algos like line distance), rest to UppHub.

Incidentally, I had already moved and refactored/cleaned up most of the 3D code of geom package into Point3D, Xform3D (inspired by and similar to the Painter's Xform2D) structures and to their related functions (as part of a very lightweight software-based 3D renderer called Sculptor package, which I needed at the time).

I can send in a pull request next weekend, if you'd like to review. (to speed up)

Best regards,
Oblivion

Github page: https://github.com/ismail-yilmaz
upp-components: https://github.com/ismail-yilmaz/upp-components
Bobcat the terminal emulator: https://github.com/ismail-yilmaz/Bobcat

[Updated on: Mon, 30 October 2023 13:33]

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Re: Geom cleanup - what do you use? [message #60637 is a reply to message #60241]

Mon, 17 June 2024 10:23

Oblivion
Messages: 1202
Registered: August 2007

Senior Contributor

Hi

As I wrote in my previous message, there is a light-weight XForm3D package I had written some time ago. You can find it attached.

1) It is a single header file.
2) It contains Point3D, Point4D, Matrix3D and Matrix4D classes (API is very similar to XForm2D).
3) These classes are aliases for templates that accept floating point types. So it allows for both single and double precision points (classes are templated)
4) It has an IsEqual() function for fuzzy comparing of matrices.

If you find it useful enough, feel free to review and/or adopt it.

P.s. There is also a simple demo app, rendering the famous 3D teapot model, using Upp::Painter with this XForm3D. I will also upload that (but first I need to clean-up its code).

Best regards,
Oblivion

Attachment: Xform3D.h
(Size: 35.35KB, Downloaded 66 times)

Github page: https://github.com/ismail-yilmaz
upp-components: https://github.com/ismail-yilmaz/upp-components
Bobcat the terminal emulator: https://github.com/ismail-yilmaz/Bobcat

[Updated on: Mon, 17 June 2024 11:23]

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Re: Geom cleanup - what do you use? [message #60642 is a reply to message #60241]

Tue, 18 June 2024 10:36

Oblivion
Messages: 1202
Registered: August 2007

Senior Contributor

XForm3D rendering code:

Attached simple example renders the teapot object, using the XForm3D api + Upp:Painter.

Screenshot:

Edit: Fixed layout file path.

Best regards,
Oblivion

Attachment: XForm3DExample.zip
(Size: 60.38KB, Downloaded 87 times)

Github page: https://github.com/ismail-yilmaz
upp-components: https://github.com/ismail-yilmaz/upp-components
Bobcat the terminal emulator: https://github.com/ismail-yilmaz/Bobcat

[Updated on: Tue, 18 June 2024 10:40]

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Re: Geom cleanup - what do you use? [message #60643 is a reply to message #60642]

Tue, 18 June 2024 15:58

koldo
Messages: 3432
Registered: August 2008

Senior Veteran

Hi Oblivion

Although I think the original post was not devoted to show this code, it is very interesting.

To run it in Windows and CLANG as deployed in U++, I have had to do a couple of changes:

- Set 'struct' instead of 'class' in 'template<typename T> struct Point3_;'
- In 'Perspective', 'Frustum' and 'Ortographic', replace 'near' and 'far' with other names. Maybe they are reserved.

The speed is right, even moving >15000 panels. I have opened the teapot four times, moving it to different positions to avoid overlapping.

There are minor details that can be added, such as the definition of background colour, object colour, location and lighting intensity, but, overall, this demo has the highest interest versus size ratio I've seen in a long time Smile

A question: the broken panels selected in red, are they a defect from the original model, or are a defect in rendering?

index.php?t=getfile&id=6946&private=0

Attachment: image.png
(Size: 109.61KB, Downloaded 283 times)

Best regards
Iñaki

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Re: Geom cleanup - what do you use? [message #60654 is a reply to message #60643]

Sun, 23 June 2024 10:03

koldo
Messages: 3432
Registered: August 2008

Senior Veteran

It seems that the original mesh doesn't fit well in that area.

index.php?t=getfile&id=6948&private=0

Attachment: image.jpg
(Size: 129.65KB, Downloaded 261 times)

Best regards
Iñaki

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Re: Geom cleanup - what do you use? [message #60662 is a reply to message #60642]

Thu, 27 June 2024 15:13

Tom1
Messages: 1301
Registered: March 2007

Ultimate Contributor

Hi Oblivion,

Very nice, indeed!

Just like Iñaki (Koldo) pointed out, I also had to do the following changes on Windows:
Quote:

To run it in Windows and CLANG as deployed in U++, I have had to do a couple of changes:

- Set 'struct' instead of 'class' in 'template<typename T> struct Point3_;'
- In 'Perspective', 'Frustum' and 'Ortographic', replace 'near' and 'far' with other names. Maybe they are reserved.

The same changes are also required on Windows when compiling with MSBT.

Thanks and best regards,

Tom

[Updated on: Thu, 27 June 2024 15:14]

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