raymarchcl

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• thi.ng/raymarchcl

[[./assets/gyroid-metal75.jpg]]

Experimental OpenCL voxel rendering/raymarching via Clojure REPL.

** Usage

#+BEGIN_SRC shell git clone [email protected]:thi-ng/raymarchcl.git cd raymarchcl lein repl #+END_SRC

*** Prepare test voxel data

#+BEGIN_SRC clojure (require '[thi.ng.raymarchcl.core :as rm]) (require '[thi.ng.raymarchcl.generators :as gen]) (require '[thi.ng.raymarchcl.io :as vio])

;; generates a 134MB binary file in project root for later reference (vio/save-volume "gyroid-512.vox" 512 (gen/make-gyroid-volume {:vres [512 512 512]})) #+END_SRC

*** Rendering from the REPL

#+BEGIN_SRC clojure (rm/test-render :width 640 :height 360 :iter 1 :vres 512 :vname "gyroid-512.vox" :mat :orange-stripes :theta -45 :dist 2.25 :dof 1e-5 :out-path "out.jpg") #+END_SRC

Important note: Increase the =:iter= count for better quality images!

Material presets are defined in the [[./src/thi/ng/raymarchcl/materials.clj][materials namespace]], currently only:

• =:orange-stripes=
• =:metal=
• =:metal2=
• =:ao=

Different voxel value bands are mapped to different materials within each preset.

** Gallery of selected experiments

*** Stanford Dragon

[[./assets/dragon-refl16.jpg]]

[[./assets/dragon2.jpg]]

*** Stanford bunny

[[./assets/bunny-normsmooth-16spp-2.jpg]]

*** Gyroid isosurface

The next two images were rendered w/ 100 iteration to reduce DOF noise

[[./assets/gyroid-100spp-2.jpg]]

[[./assets/gyroid-100spp.jpg]]

[[./assets/gyroid-2.jpg]]

[[./assets/gyroid-25spp.jpg]]

[[./assets/gyroid-dof-corner.jpg]]

[[./assets/gyroid-dof0.025.jpg]]

[[./assets/gyroid-res224-dof0.025.jpg]]

*** NVidia Tesla on EC2

These images were rendered using Tesla instances on AWS EC2 (back in 2013)

[[./assets/gyroid-metal-dof8.jpg]]

[[./assets/gyroid-tesla.jpg]]

** License

Copyright © 2013 - 2015 Karsten Schmidt

Distributed under the Apache Software License 2.0