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Author Topic: OpenCL marching cubes source code release  (Read 3995 times)
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folded
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« on: March 12, 2013, 03:21:17 PM »

Hi,

I just thought I'd share the initial release of my OpenCL marching cubes code.

It's available at https://github.com/folded/clemency.

In its current form it's probably not for the faint-of-heart, but it works, and I think it's actually pretty decently functional. It compiles fine on OSX 10.8 (OpenCL is required, so 10.6 is a definite minimum) but it may well compile in other places too. Building is done with cmake.

The image below is a meshlab "render" of the mesh generated by the command:

clmc -g 512 -C "-D ITERATIONS=5"  -a -1.2,-1.2,-1.2:1.2,1.2,1.2 opencl/mandelbulb.cl


Which, in short, does marching cubes on of a power 8 mandelbulb (5 iterations), in the cube bounded by <-1.2,-1.2,-1.2> - <1.2,1.2,1.2>, on a grid size of 512.

The full set of command line arguments is in the README.

The output is a triangle mesh with 8,619,704 faces.

The nice thing about this (IMO) is that it will produce a mesh for anything you can write an OpenCL kernel for. All that's needed is to implement a function
bool inside(float3 pos);


Also, after the initial evaluation on a regular grid, the intersections are refined, so the result is a lot less "stair-steppy" than doing MC on a z-stack of image slices.

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makc
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« Reply #1 on: March 12, 2013, 05:37:15 PM »

there is menger sponge hit test somewhere around here, would be nice to see how it handles sharp angles wink edit: found it http://www.fractalforums.com/ifs-iterated-function-systems/revenge-of-the-half-eaten-menger-sponge/#msg8382
« Last Edit: March 12, 2013, 05:39:38 PM by makc » Logged
Patryk Kizny
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kizny
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« Reply #2 on: May 24, 2015, 06:00:50 PM »

Would you be able to generate poincloud instead of mesh?
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Visual Artist, Director & Cinematographer specialized in emerging imaging techniques.
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« Reply #3 on: May 25, 2015, 05:35:39 AM »

Would you be able to generate poincloud instead of mesh?

Surely that defeats the point of marching cubes ?
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