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I have the following code in python using the vedo package
mesh.lighting(style='plastic', ambient=None, diffuse=None, specular=None,
specular_color=None, specular_power=None, metallicity=None, roughness=None)
I know that I need a combination for ambient, diffuse, specular value to creating phong lighting. How do I determine these values? And how do I know I have created phong lighting?
From the manual:
style : (str) preset style, options are [metallic, plastic, shiny,
glossy, ambient, off]
ambient : (float) ambient fraction of emission
[0-1]
diffuse : (float) emission of diffused light in fraction [0-1]
specular : (float) fraction of reflected light [0-1]
specular_power :
(float) precision of reflection [1-100]
specular_color : (color) color that is being reflected by the surface
Set the ambient/diffuse/specular parameters to increasing values one at a time and observe the effect. A Phong model requires a combination of the three components. Also play with specular_power and specular_color (only relevant with nonzero specular).
I could not find any information on metallicity nor roughness. Have a try with values in range [0-1].
It is possible (likely) that the preset styles enforce predefined sets of parameter values, and to use your own the off mode is required.
