Purpose
Ecount When count is zero, a two-byte extended count follows. This allows for polylines with vertices 256 through 65,791 which are encoded as an integer in the range 0 to 65,535.
X1,Y1 The first vertex (in logical coordinates) of the first line segment in the list.
R1,G1,B1,A1 The color of the first vertex of the first triangle in the list (interpreted as intensities of the red, green, blue, and alpha channels, respectively). Legal intensity values range from zero to 255 for each channel.
C1 The color of the first vertex of the first line segment in the list (interpreted as 4 bytes representing an RGBA color).
Xi,Yi A vertex (in logical coordinates) in the list that, when combined with the previous vertex, defines the ith line segment in the list.
Ri,Gi,Bi,Ai The color of the the ith vertex in the list.
Ci The color of the ith vertex in the list (interpreted as 4 bytes representing an RGBA color).
Details
The polylines are rendered as Gouraud shaded lines in accordance with the current "Line Weight", "Line Cap", "Line Pattern", and "Visibility" attributes.
Notes