def midLineExtended(self):
line = self.midLine
maxxp = max(self.treble.end.x, self.bass.start.x)
minxp = min(self.treble.start.x, self.bass.end.x)
return linexy(
lineIntersection(linexy(vxy(maxxp, 0), vxy(maxxp, 1)), line).point,
lineIntersection(linexy(vxy(minxp, 0), vxy(minxp, 1)), line).point
)
def calc_virt_frame():
# String spread
spread = (inst.bridge.stringDistanceProj - inst.nut.stringDistanceProj) / 2.0
# Bass string length from nut to bridge (include nut offset before zero fret)
length = inst.scale.max + inst.nut.offset
# Side angle
angle = math.asin(spread / length)
bass = line(vxy(0, 0), vxy(-length, 0)).rotate(-angle)
bass.translateTo(bass.lerpPointAt(-inst.nut.offset))
bridge = line(bass.end, vxy(0, - inst.bridge.stringDistanceProj))
treble = line(bridge.end, vxy(length, 0)).rotate(angle)
nut = lineTo(treble.end, bass.start)
return FretboardBox(bass, treble, nut, bridge)
def lineIntersection(line1, line2):
# ! Credits: justin_c_rounds https://stackoverflow.com/a/60368757/1524027
# if the lines intersect, the result contains the x and y of the intersection
# (treating the lines as infinite) and booleans for whether line segment 1 or line segment 2 contain the point
result = Intersection()
denominator = ((line2.end.y - line2.start.y) *
(line1.end.x - line1.start.x)) - (
(line2.end.x - line2.start.x) *
(line1.end.y - line1.start.y))
if denominator == 0:
return result
a = line1.start.y - line2.start.y
b = line1.start.x - line2.start.x
numerator1 = ((line2.end.x - line2.start.x) * a) - (
(line2.end.y - line2.start.y) * b)
numerator2 = ((line1.end.x - line1.start.x) * a) - (
(line1.end.y - line1.start.y) * b)
a = numerator1 / denominator
b = numerator2 / denominator
# if we cast these lines infinitely in both directions, they intersect here:
result.point = vxy(line1.start.x + (a * (line1.end.x - line1.start.x)),
line1.start.y + (a * (line1.end.y - line1.start.y)))
# if line1 is a segment and line2 is infinite, they intersect if:
if 0 < a < 1:
result.onLine1 = True
# if line2 is a segment and line1 is infinite, they intersect if:
if 0 < b < 1:
result.onLine2 = True
# if line1 and line2 are segments, they intersect if both of the above are true
return result
def calc_neck_frame():
x = max(frame.bass.start.x, frame.treble.end.x)
perp = linexy(vxy(x, 0), vxy(x, 1))
p = lineIntersection(frame.bass, perp)
q = lineIntersection(frame.treble, perp)
nut = linexy(p.point, q.point)
if inst.neck.joint is NeckJoint.THROUHG:
x = min(frame.bass.end.x, frame.treble.start.x) - inst.body.length
else:
x = min(frame.bass.end.x, frame.treble.start.x)
perp = linexy(vxy(x, 0), vxy(x, 1))
p = lineIntersection(frame.bass, perp)
q = lineIntersection(frame.treble, perp)
bridge = linexy(q.point, p.point)
bass = linexy(bridge.end.clone(), nut.start.clone())
treble = linexy(nut.end.clone(), bridge.start.clone())
return FretboardBox(bass, treble, nut, bridge)
def calc_fretboard_frame():
# Bass include nut and margin
bassRef = lineTo(fret0.start, frets[1].start)
s = bassRef.lerpPointAt(-inst.nut.offset - inst.nut.thickness - inst.fretboard.startMargin)
e = lineFrom(fretz.start, bassRef.vector, inst.fretboard.endMargin).end
bass = lineTo(s, e)
# Treble
trebRef = lineTo(fret0.end, frets[1].end)
if (inst.nut.position is NutPosition.PARALLEL):
s = trebRef.lerpPointAt(-inst.nut.offset - inst.nut.thickness - inst.fretboard.startMargin)
e = lineFrom(fretz.end, trebRef.vector, inst.fretboard.endMargin).end
treble = lineTo(e, s)
else:
"""if inst.nut.position is NutPosition.PERPENDICULAR"""
tmp = lineFrom(bass.start, vxy(0, -1), 100)
i = lineIntersection(tmp, trebRef).point or trebRef.lerpPointAt(
-inst.nut.offset - inst.nut.thickness - inst.fretboard.startMargin)
e = lineFrom(fretz.end, trebRef.vector, inst.fretboard.endMargin).end
treble = lineTo(e, i)
# Custom cut
if (inst.fretboard.cut is FretboardCut.CUSTOM):
bass = bass.lerpLineTo(inst.fretboard.cutBassDistance)
treble = treble.cloneInverted().lerpLineTo(inst.fretboard.cutTrebleDistance).cloneInverted()
elif (inst.fretboard.cut is FretboardCut.PERPENDICULAR):
if (inst.fretboard.cutBassDistance):
bass = bass.lerpLineTo(inst.fretboard.cutBassDistance)
tmp = lineFrom(bass.end, vxy(0, -1), 100)
i = lineIntersection(tmp, treble)
if (i.point):
treble = lineTo(i.point, treble.end)
bridge = lineTo(bass.end, treble.start)
nut = lineTo(treble.end, bass.start)
return FretboardBox(bass, treble, nut, bridge)
def makeTenon(fbd, neckAngleRad, posXY, h, tenonThickness, tenonLength,
tenonOffset, joint):
if tenonThickness > 0 \
and tenonLength > 0 \
and joint is NeckJoint.SETIN:
naLineDir = linexy(vxy(0, 0),
angleVxy(math.pi + neckAngleRad, tenonLength))
naAp = geom.vecxz(naLineDir.start)
naBp = geom.vecxz(naLineDir.end)
refp = geom.vec(posXY, tenonOffset - h + tenonThickness)
naSidePs = [
naAp,
Vector(naAp.x, naAp.y, naAp.z - tenonThickness),
Vector(naBp.x, naBp.y, naBp.z - tenonThickness), naBp, naAp
]
naSidePs = [v.add(refp) for v in naSidePs]
naSide = Part.Face(Part.makePolygon(naSidePs)).extrude(
Vector(0, fbd.neckFrame.bridge.length, 0))
return naSide
def buildFretboardData(inst):
"""
Create Fretboard reference constructions
"""
# Virtual String Frame (String projection)
def calc_virt_frame():
# String spread
spread = (inst.bridge.stringDistanceProj - inst.nut.stringDistanceProj) / 2.0
# Bass string length from nut to bridge (include nut offset before zero fret)
length = inst.scale.max + inst.nut.offset
# Side angle
angle = math.asin(spread / length)
bass = line(vxy(0, 0), vxy(-length, 0)).rotate(-angle)
bass.translateTo(bass.lerpPointAt(-inst.nut.offset))
bridge = line(bass.end, vxy(0, - inst.bridge.stringDistanceProj))
treble = line(bridge.end, vxy(length, 0)).rotate(angle)
nut = lineTo(treble.end, bass.start)
return FretboardBox(bass, treble, nut, bridge)
virtStrFrame = calc_virt_frame()
# Scale Frame
def calc_scale_frame():
s = virtStrFrame.bass.lerpPointAt(inst.nut.offset)
bass = lineTo(s, virtStrFrame.bass.end)
bassPF = fret(inst.fretboard.perpendicularFret, inst.scale.bass)
trebPF = fret(inst.fretboard.perpendicularFret, inst.scale.treble)
scaleOffset = bassPF - trebPF
vtreb = virtStrFrame.treble.cloneInverted()
nut = lineTo(vtreb.lerpPointAt(scaleOffset + inst.nut.offset), bass.start)
treble = lineTo(vtreb.lerpPointAt(scaleOffset + inst.nut.offset + inst.scale.treble), nut.start)
bridge = lineTo(bass.end, treble.start)
return FretboardBox(bass, treble, nut, bridge)
scaleFrame = calc_scale_frame()
bassSideMargin = inst.fretboard.sideMargin + inst.stringSet.last / 2.0
trebSideMargin = inst.fretboard.sideMargin + inst.stringSet.first / 2.0
# Frets
def calc_frets():
frets = []
vtreb = scaleFrame.treble.cloneInverted()
for i in range(inst.fretboard.frets + 1):
s = fret(i, inst.scale.bass)
e = fret(i, inst.scale.treble)
ps = scaleFrame.bass.lerpPointAt(s)
pe = vtreb.lerpPointAt(e)
bfret = lineTo(ps, pe)
bassMargin = bassSideMargin / math.sin(-bfret.vector.angle())
trebleMargin = trebSideMargin / math.sin(-bfret.vector.angle())
ps = bfret.lerpPointAt(-bassMargin)
pe = bfret.lerpPointAt(bfret.vector.length + bassMargin + trebleMargin)
frets.append(lineTo(ps, pe))
return frets
frets = calc_frets()
fret0 = frets[0]
fretz = frets[-1]
# Fretboard Frame
def calc_fretboard_frame():
# Bass include nut and margin
bassRef = lineTo(fret0.start, frets[1].start)
s = bassRef.lerpPointAt(-inst.nut.offset - inst.nut.thickness - inst.fretboard.startMargin)
e = lineFrom(fretz.start, bassRef.vector, inst.fretboard.endMargin).end
bass = lineTo(s, e)
# Treble
trebRef = lineTo(fret0.end, frets[1].end)
if (inst.nut.position is NutPosition.PARALLEL):
s = trebRef.lerpPointAt(-inst.nut.offset - inst.nut.thickness - inst.fretboard.startMargin)
e = lineFrom(fretz.end, trebRef.vector, inst.fretboard.endMargin).end
treble = lineTo(e, s)
else:
"""if inst.nut.position is NutPosition.PERPENDICULAR"""
tmp = lineFrom(bass.start, vxy(0, -1), 100)
i = lineIntersection(tmp, trebRef).point or trebRef.lerpPointAt(
-inst.nut.offset - inst.nut.thickness - inst.fretboard.startMargin)
e = lineFrom(fretz.end, trebRef.vector, inst.fretboard.endMargin).end
treble = lineTo(e, i)
# Custom cut
if (inst.fretboard.cut is FretboardCut.CUSTOM):
bass = bass.lerpLineTo(inst.fretboard.cutBassDistance)
treble = treble.cloneInverted().lerpLineTo(inst.fretboard.cutTrebleDistance).cloneInverted()
elif (inst.fretboard.cut is FretboardCut.PERPENDICULAR):
if (inst.fretboard.cutBassDistance):
bass = bass.lerpLineTo(inst.fretboard.cutBassDistance)
tmp = lineFrom(bass.end, vxy(0, -1), 100)
i = lineIntersection(tmp, treble)
if (i.point):
treble = lineTo(i.point, treble.end)
bridge = lineTo(bass.end, treble.start)
nut = lineTo(treble.end, bass.start)
return FretboardBox(bass, treble, nut, bridge)
frame = calc_fretboard_frame()
# Nut Frame
def calc_nut_frame():
vtreb = frame.treble.cloneInverted()
s = frame.bass.lerpPointAt(inst.fretboard.startMargin)
bass = lineFrom(s, frame.bass.vector, inst.nut.thickness)
s = vtreb.lerpPointAt(inst.fretboard.startMargin)
treble = lineFrom(s, vtreb.vector, inst.nut.thickness).flipDirection()
return FretboardBox(bass, treble, lineTo(treble.end, bass.start), lineTo(bass.end, treble.start))
nutFrame = calc_nut_frame()
# Adjust ScaleFrame ans virtStrFrame (Center in Fretboard)
def adjust_scale_frame():
diff = frets[0].mid().sub(scaleFrame.nut.mid())
return (scaleFrame.translate(diff), virtStrFrame.translate(diff))
(scaleFrame, virtStrFrame) = adjust_scale_frame()
# Bridge position line with compensation
def cal_bridge_pos():
a = scaleFrame.treble.lerpPointAt(-inst.bridge.trebleCompensation)
b = scaleFrame.bass.lerpPointAt(scaleFrame.bass.length + inst.bridge.bassCompensation)
return linexy(a, b)
bridgePos = cal_bridge_pos()
# Neck Frame
def calc_neck_frame():
x = max(frame.bass.start.x, frame.treble.end.x)
perp = linexy(vxy(x, 0), vxy(x, 1))
p = lineIntersection(frame.bass, perp)
q = lineIntersection(frame.treble, perp)
nut = linexy(p.point, q.point)
if inst.neck.joint is NeckJoint.THROUHG:
x = min(frame.bass.end.x, frame.treble.start.x) - inst.body.length
else:
x = min(frame.bass.end.x, frame.treble.start.x)
perp = linexy(vxy(x, 0), vxy(x, 1))
p = lineIntersection(frame.bass, perp)
q = lineIntersection(frame.treble, perp)
bridge = linexy(q.point, p.point)
bass = linexy(bridge.end.clone(), nut.start.clone())
treble = linexy(nut.end.clone(), bridge.start.clone())
return FretboardBox(bass, treble, nut, bridge)
neckFrame = calc_neck_frame()
fbd = FretboardData(frame, virtStrFrame, scaleFrame, nutFrame, frets, bridgePos, neckFrame)
fbd = fbd.translate(vxy(0, 0).sub(neckFrame.nut.mid()))
return fbd
def makeHeel(neckd, line, angle, joint, backThickness, topThickness, topOffset,
neckPocketDepth, neckPocketLength, jointFret, transitionLength,
transitionTension, bodyLength, tenonThickness, tenonLength,
tenonOffset, forPocket):
"""
Create heel shape.
Args:
fbd : FredboardData
line : linexy, reference line
"""
fbd = neckd.fbd
neckAngleRad = deg(angle)
if joint is NeckJoint.THROUHG:
h = backThickness + topThickness + topOffset
else:
h = neckPocketDepth + topOffset
if forPocket:
jointFret = 0
start_p = lineIntersection(fbd.frets[jointFret], line).point
start_d = linexy(line.start, start_p).length
# Curved Part
if not forPocket:
transitionJob = Task.execute(heelTransition, neckd, line, start_d, h,
transitionLength, transitionTension)
xperp = line.lerpLineTo(
start_d + transitionLength).perpendicularCounterClockwiseEnd()
a = lineIntersection(xperp, fbd.neckFrame.treble).point
b = lineIntersection(xperp, fbd.neckFrame.bass).point
c = fbd.neckFrame.bridge.end
d = fbd.neckFrame.bridge.start
# Rect Part
def heelBase():
segments = [
Part.LineSegment(geom.vec(b), geom.vec(c)),
Part.LineSegment(geom.vec(c), geom.vec(d)),
Part.LineSegment(geom.vec(d), geom.vec(a)),
Part.LineSegment(geom.vec(a), geom.vec(b)),
]
part = Part.Face(Part.Wire(Part.Shape(segments).Edges)).extrude(
Vector(0, 0, -100))
return part
partJob = Task.execute(heelBase)
if not forPocket:
transition = transitionJob.get()
else:
transition = None
part = partJob.get()
if transition:
part = transition.fuse(part)
# Neck Angle Cut (Bottom)
extrusionDepth = 100
lengthDelta = max(neckPocketLength,
(fbd.neckFrame.midLine.length -
start_d)) #- inst.neck.transitionLength/2
naLineDir = linexy(vxy(0, 0), angleVxy(neckAngleRad, lengthDelta))
naLineDir = naLineDir.flipDirection().lerpLineTo(naLineDir.length +
30).flipDirection()
naAp = geom.vecxz(naLineDir.start)
naBp = geom.vecxz(naLineDir.end)
refp = geom.vec(fbd.frame.bridge.end,
-h).add(Vector(0, -fbd.neckFrame.bridge.length / 2, 0))
if joint is NeckJoint.THROUHG:
refp = refp.add(
Vector(-bodyLength * math.cos(neckAngleRad), 0,
-bodyLength * math.sin(neckAngleRad)))
naSidePs = [
naAp,
Vector(naAp.x, naAp.y, naAp.z - extrusionDepth),
Vector(naBp.x, naBp.y, naBp.z - extrusionDepth), naBp, naAp
]
naSidePs = [v.add(refp) for v in naSidePs]
naSide = Part.Face(Part.makePolygon(naSidePs)).extrude(
Vector(0, fbd.neckFrame.bridge.length * 2, 0))
# Cut bottom
part = part.cut(naSide)
# Then move and cut top (Remove Top thickness)
cutThickness = extrusionDepth * math.cos(neckAngleRad)
naSide.translate(
Vector((backThickness + cutThickness) * math.sin(neckAngleRad), 0,
(backThickness + cutThickness) * math.cos(neckAngleRad)))
naSide.translate(
Vector((bodyLength - lengthDelta) * math.cos(neckAngleRad), 0,
(bodyLength - lengthDelta) * math.sin(neckAngleRad)))
part = part.cut(naSide)
# Tenon
tenon = makeTenon(fbd, neckAngleRad, d, h,
tenonThickness + 100 if forPocket else tenonThickness,
tenonLength, tenonOffset, joint)
if tenon:
part = part.fuse(tenon)
return part.removeSplitter()
def lerp(self, alpha):
return vxy().lerpVectors(self.v1, self.v2, alpha)
def vector(self):
return vxy().subVectors(self.v2, self.v1)
def line(start, vector):
return linexy(start.clone(), vxy().addVectors(start, vector))
