pygfx.materials.VolumeIsoMaterial

class pygfx.materials.VolumeIsoMaterial(threshold: float = 0.5, step_size: float = 1.0, substep_size: float = 0.1, emissive: Color = '#000', shininess: float = 30, **kwargs)

Bases: VolumeRayMaterial

A material rendering a volume using isosurface rendering.

Parameters:

threshold (float) – The threshold texture value at which the surface is rendered. The default value is 0.5.
step_size (float) – The size of the initial ray marching step for the initial surface finding. Smaller values will result in more accurate surfaces but slower rendering. Default value is 1.0.
substep_size (float) – The size of the raymarching step for the refined surface finding. Smaller values will result in more accurate surfaces but slower rendering. Default value is 0.1.
emissive (Color) – The emissive color of the surface. I.e. the color that the object emits even when not lit by a light source. This color is added to the final color and unaffected by lighting. The alpha channel is ignored. Default value is (0, 0, 0, 1).
shininess (int) – How shiny the specular highlight is; a higher value gives a sharper highlight. Default value is 30.

property threshold: float: The threshold texture value at which the surface is rendered.

property step_size: float

The size of the initial ray marching step for finding the surface.

Smaller values will result in more accurate surfaces but slower rendering.

property substep_size: float

The size of the raymarching step for the refined surface finding.

Smaller values will result in more accurate surfaces but slower rendering.

property emissive: The emissive (light) color of the surface. This color is added to the final color and is unaffected by lighting. The alpha channel of this color is ignored.

property shininess: How shiny the specular highlight is; a higher value gives a sharper highlight. Default is 30.