Material¶

Data graph nodes (samson.DataModel.DataGraph.Node) in SAMSON may have materials that apply to themselves and their descendants. Materials may be used to modify the visual appearance of data graph nodes. Each material has an associated color scheme to color nodes in a specific way, e.g. color atoms by residue, chain, etc. or based on node properties (e.g. temperature factor, occupancy, etc.).

# get all residues
nodeIndexer = SAMSON.getNodes('node.type sm')

# create a color scheme per residue type
# by providing the node indexer of residues to the color scheme constructor
# we allow it to determine the color range based on the minimal and maximal residue types
colorScheme = sam.DataModel.Color.ColorSchemePerResidueType(nodeIndexer)

# apply the color scheme to nodes
for node in nodeIndexer:
        material = sam.DataModel.DataGraph.Material()
        material.setColorScheme(colorScheme)
        node.setMaterial(material)