project "Datums at an angle"
level L1 elev 0'
level L2 elev 12'
level L3 elev 24'
grid A vertical at 0'
grid B vertical at 30'
grid 1 horizontal at 0'
grid 2 horizontal at 30'
grid 3 horizontal at 60'
walltype EXT-1 layers [brick 4", air 1", core: stud 6", gyp 5/8"]
grid C bearing 23deg at 30' # oblique gridline, bubble on it; N23°E through (27.6', -11.7')
grid D bearing 45° at 40' # ° accepted on input; prints as 45deg
refplane RP0 bearing 23deg at 50' # vertical, parallel to C, 20' to its right; green line, id at the ends
refplane RV bearing 23deg at (grid.A, grid.1) # vertical, through the A/1 corner
wall EXT-1 W1 from grid.1 to grid.2 along grid.C base level.L1 top level.L3 # a wall along a skewed datum, two stories tall so S1 reaches the deck
wall EXT-1 W2 from grid.A to refplane.RP0 along grid.2 base level.L1 # a wall that STOPS at a skewed refplane
refplane BW bearing 0deg tilt 1:12 at (grid.A, grid.1, level.L1) # a battered wall's west face: x = z/12; S1 shows it leaning east 1:12
refplane LN bearing 90deg lean 1:12 at (grid.A + 1', grid.1, level.L1) # the same wall's east face, 1'-0" east of BW at the base: x = 12" + z/12; written column-style
refplane R1 bearing 180deg slope 4:12 at (grid.A, grid.1, level.L2) # a 4:12 roof plane: z = 12' + y/3; falls south
refplane RM bearing 90deg rise 1:12 at (grid.A, grid.1, level.L1) # a ramp plane: z = x/12; rises east
refplane USDECK elev level.L3 - 1'-6" # flat, z = 22'-6"
refplane HG through (grid.B, level.L2) tilt 1:12 # hinge on grid B at L2: BW slid east to B and up to L2
refplane RP2 through (grid.B, grid.2, level.L1) (grid.B, grid.3, level.L1) (grid.A, grid.2, level.L2) # surveyor's three shots: z = 12' - 0.4x
