Add a logo to object via a .TGA import and extrude

[thsmit]

Hi, I am experimenting with the code. It is going well. Complements about the code and open-sourcing it!

I want to add a logo to a part by importing a logo.tga file and extruding it. I can import the TGA with:

TgaIo.LoadTga("logo.tga", out Image logo);

Now I am struggling with transforming the .tga file to a voxel field and maybe extruding the logo.
Can you help me out?

Best, Thijs

[LinKayser]

The ShapeKernel has a surface modulation function that takes an image as an input, this is the easiest way to do it (we don't have embossing on the Voxel level directly).

https://github.com/leap71/LEAP71_ShapeKernel/blob/main/ShapeKernel/Modulations/SurfaceModulation(2D).cs

Maybe @josefinelissner can show us an example :)

Lin

[josefinelissner]

Hi Thijs!

Images can be used as 2D-SurfaceModulation objects and inputed into any base shape that can do SurfaceModulations.
However, there is a base shape called "BaseLogoBox" that is specifically designed for the use as a Logo plate. It's internal meshing strategy will copy the pixel resolution of your image.

I am attaching a example code that showcases how to use this base shape:
Ex_LogoShowCase.txt

Here is the output of Step 1, which is the simples case.

Note that there is a mapping function which correlates pixel grayscale value (normalized between 0 and 1) to an "emboss" height. A different function (e.g. Option 2) will allow you to invert the image emboss.

As a Step 2 you can add a transformation to the BaseLogoBox (just like any other base shape) that allows you to e.g. transform this plate into a cylindrical coordinate space.

The trafo function can also be used to flip the image relative to your base shape coordinate system or to do some more elaborate / conformal geometries. If you toggle Option 2 in the trafo function you will also have an example of how to make the "emboss" overhang conformal for 3D-printing. Note that the embossed structure does not depart perfectly perpendicular from the cylinder, but at a printable angle.

Hope this give you some background and initial direction.
Best,
Josefine

[josefinelissner]

Remember to update the TGA Filename in my code snippet, I just put a dummy name in! @thsmit

[thsmit]

Thank you @LinKayser and @josefinelissner for the quick reply. This works perfectly.