VRML allows to define a polyline which has a starting coordinate, several intermediate coordinates, and an ending coordinate. The VRML browser draws a straight line from the strarting coordinate to the first intermediate coordinate, from there to the second intermediate coordinate, and so on, finishing the polyline or the ending coordinate.
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IndexedLineSet {
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set_colorIndex # eventIn MFInt32
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set_coordIndex # eventIn MFInt32
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color NULL # exposedField SFNode
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coord NULL # exposedField SFNode
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colorIndex [] # field MFInt32
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colorPerVertex TRUE # field SFBool
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coordIndex [] # field MFInt32
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}
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