intParams (input): NULL for default values, or 3 integer values:
intParams[0]: line size of the path
intParams[2]: reserved. Set to 0
floatParams (input): NULL for default values, or 3 float values:
floatParams[0]: control point size
floatParams[1]: the angular to linear conversion coefficient
floatParams[2]: the virtual distance scaling factor
color (input): pointer to 4x3 values representing the colors of the path (ambient_diffuse rgb, 3 reserved values (set to zero), specular rgb and emission rgb). Can be NULL for default values
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