color (e.g. color=”255 0 0 0.5” which specifies the color of the object in red-green-blue enconding (here it is red) and its opacity (a floating point value between 0 and 1).
shader which specifies the name of the shader applied to the object.
size which describes the pixel size of the curve when this is applicable.
It is defining an object of type myobj named “o1”, of size 0.1, of red color and transparency 0.5. If the shader attribute is used, then the color and transparency values are not taken into account.
The following objects can be manipulated with the plugin BSplineTools.
algebraic surfaces in the 3-dimensional space defined by on polynomial equation.