Layout Descriptors

These are the structures for describing a track layout graphically. It uses a integer coordinate system (grid):

Origin at the top left corner
Only one primitive in each grid point, except for Signal Light and Presence
Primitive SVG graphic is centered in square (0,0:1,1)
Positioning SVG origin: center of primitive (0.5,0.5)

Primitives: (footprint)

Straight: (0,0:1,1)
Corner: (0,0:1,1)
Diagonal: (0,0.5:1,1.5)
Switch Left: Straight | Left, (0,-1:1,1)
Switch Right: Straight | Right, (0,0:1,2)
Signal Light: Green | Red, (0,0:1,1)
Train Presence: On | Off, (0,0:1,1)

Layout Descriptor

ID
PlacedPrimitive[]

PlacedPrimitive

ID
FromPos: x, y
ToPos: x, y
Rotation: 0 | 90 | 180 | 270
PrimitiveID
DataID
SegmentID