Fresnel.jl

Fresnel.jl is a simple wrapper around the fresnel raytracer (v0.13.5). The Julia interface here closely follows the Python version, the only difference being that object attributes are accessed using methods: Use attribute(object) to retrieve an attribute and attribute!(object, value) to modify it. Keeping this minor difference in mind, the original Python docs should largely apply to this Julia wrapper as well.

Example

This is a recreation of the original introduction notebook in Julia.

Import Fresnel and create a scene with Scene:

using Fresnel
scene = Scene()

Add a geometry object to the scene

spheres = add_geometry!(scene, :sphere, N=8, radius=1.0)
# Alternatively:
# spheres = Sphere(scene, N=8, radius=1.0)

Note that to avoid collisions with Base.position, methods to access position attributes are named pos / pos!. Below we set the positions of the eight spheres using pos!:

pos!(spheres, [ 1  1  1;
		1  1 -1;
		1 -1  1;
		1 -1 -1;
               -1  1  1;
	       -1  1 -1;
               -1 -1  1;
               -1 -1 -1])

Other attributes are set similarly. Note the use of the color_linear function to convert color scales.

material!(spheres, Material(color=color_linear([0.25,0.5,0.9]), roughness=0.8))

Creating a camera fit to the scene is achieved with the function fit_camera, which takes the type of camera as the first argument (although only Orthographic is currently implemented):

camera!(scene, fit_camera(Orthographic, scene))

We can then render an image of our scene with preview or pathtrace:

image = preview(scene)

Rendering functions like preview and pathtrace return an ImageArray, which is displayed as an image in most Julia environments. The value of the array can be accessed via image_array(image). If your environment does not automatically display an image, you can use the array data to manually create one.