kicad/pcbnew/scripting/plugins/FootprintWizardDrawingAids.py

500 lines
14 KiB
Python

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
from __future__ import division
import pcbnew
import math
class FootprintWizardDrawingAids:
"""
Collection of handy functions to simplify drawing shapes from within
footprint wizards
A "drawing context" is provided which can be used to set and retain
settings such as line width and layer
"""
# directions (in degrees, compass-like)
dirN = 0
dirNE = 45
dirE = 90
dirSE = 135
dirS = 180
dirSW = 225
dirW = 270
dirNW = 315
# flip constants
flipNone = 0
flipX = 1 # flip X values, i.e. about Y
flipY = 2 # flip Y valuersabout X
flipBoth = 3
xfrmIDENTITY = [1, 0, 0, 0, 1, 0] # no transform
def __init__(self, module):
self.module = module
# drawing context defaults
self.dc = {
'layer': pcbnew.F_SilkS,
'width': pcbnew.FromMM(0.2),
'transforms': [],
'transform': self.xfrmIDENTITY
}
def PushTransform(self, mat):
"""
Add a transform to the top of the stack and recompute the
overall transform
"""
self.dc['transforms'].append(mat)
self.RecomputeTransforms()
def PopTransform(self, num=1):
"""
Remove a transform from the top of the stack and recompute the
overall transform
"""
for i in range(num):
mat = self.dc['transforms'].pop()
self.RecomputeTransforms()
return mat
def ResetTransform(self):
"""
Reset the transform stack to the identity matrix
"""
self.dc['transforms'] = []
self.RecomputeTransforms()
def _ComposeMatricesWithIdentity(self, mats):
"""
Compose a sequence of matrices together by sequential
pre-mutiplciation with the identity matrix
"""
x = self.xfrmIDENTITY
for mat in mats:
#precompose with each transform in turn
x = [
x[0] * mat[0] + x[1] * mat[3],
x[0] * mat[1] + x[1] * mat[4],
x[0] * mat[2] + x[1] * mat[5] + x[2],
x[3] * mat[0] + x[4] * mat[3],
x[3] * mat[1] + x[4] * mat[4],
x[3] * mat[2] + x[4] * mat[5] + x[5]]
return x
def RecomputeTransforms(self):
"""
Re-compute the transform stack into a single transform and
store in the DC
"""
self.dc['transform'] = self._ComposeMatricesWithIdentity(
self.dc['transforms'])
def TransformTranslate(self, x, y, push=True):
"""
Set up and return a transform matrix representing a translartion
optionally pushing onto the stack
( 1 0 x )
( 0 1 y )
"""
mat = [1, 0, x, 0, 1, y]
if push:
self.PushTransform(mat)
return mat
def TransformFlipOrigin(self, flip, push=True):
"""
Set up and return a transform matrix representing a horizontal,
vertical or both flip about the origin
"""
mat = None
if flip == self.flipX:
mat = [-1, 0, 0, 0, 1, 0]
elif flip == self.flipY:
mat = [1, 0, 0, 0, -1, 0]
elif flip == self.flipBoth:
mat = [-1, 0, 0, 0, -1, 0]
elif flip == self.flipNone:
mat = self.xfrmIDENTITY
else:
raise ValueError
if push:
self.PushTransform(mat)
return mat
def TransformFlip(self, x, y, flip=flipNone, push=True):
"""
Set up and return a transform matrix representing a horizontal,
vertical or both flip about a point (x,y)
This is performed by a translate-to-origin, flip, translate-
back sequence
"""
mats = [self.TransformTranslate(x, y, push=False),
self.TransformFlipOrigin(flip, push=False),
self.TransformTranslate(-x, -y, push=False)]
#distill into a single matrix
mat = self._ComposeMatricesWithIdentity(mats)
if push:
self.PushTransform(mat)
return mat
def TransformRotationOrigin(self, rot, push=True):
"""
Set up and return a transform matrix representing a rotation
about the origin, and optionally push onto the stack
( cos(t) -sin(t) 0 )
( sin(t) cos(t) 0 )
"""
rads = rot * math.pi / 180
mat = [math.cos(rads), -math.sin(rads), 0,
math.sin(rads), math.cos(rads), 0]
if push:
self.PushTransform(mat)
return mat
def TransformRotation(self, x, y, rot, push=True):
"""
Set up and return a transform matrix representing a rotation
about the pooint (x,y), and optionally push onto the stack
This is performed by a translate-to-origin, rotate, translate-
back sequence
"""
mats = [self.TransformTranslate(x, y, push=False),
self.TransformRotationOrigin(rot, push=False),
self.TransformTranslate(-x, -y, push=False)]
#distill into a single matrix
mat = self._ComposeMatricesWithIdentity(mats)
if push:
self.PushTransform(mat)
return mat
def TransformScaleOrigin(self, sx, sy=None, push=True):
"""
Set up and return a transform matrix representing a scale about
the origin, and optionally push onto the stack
( sx 0 0 )
( 0 sy 0 )
"""
if sy is None:
sy = sx
mat = [sx, 0, 0, 0, sy, 0]
if push:
self.PushTransform(mat)
return mat
def TransformPoint(self, x, y, mat=None):
"""
Return a point (x, y) transformed by the given matrix, or if
that is not given, the drawing context transform
"""
if not mat:
mat = self.dc['transform']
return pcbnew.wxPoint(x * mat[0] + y * mat[1] + mat[2],
x * mat[3] + y * mat[4] + mat[5])
def SetWidth(self, width):
"""
Set the current pen width used for subsequent drawing
operations
"""
self.dc['width'] = width
def GetWidth(self):
"""
Get the current drawing context width
"""
return self.dc['width']
def SetLayer(self, layer):
"""
Set the current drawing layer, used for subsequent drawing
operations
"""
self.dc['layer'] = layer
def Line(self, x1, y1, x2, y2):
"""
Draw a line from (x1, y1) to (x2, y2)
"""
outline = pcbnew.EDGE_MODULE(self.module)
outline.SetWidth(self.dc['width'])
outline.SetLayer(self.dc['layer'])
outline.SetShape(pcbnew.S_SEGMENT)
start = self.TransformPoint(x1, y1)
end = self.TransformPoint(x2, y2)
outline.SetStartEnd(start, end)
self.module.Add(outline)
def Circle(self, x, y, r, filled=False):
"""
Draw a circle at (x,y) of radius r
If filled is true, the width and radius of the line will be set
such that the circle appears filled
"""
circle = pcbnew.EDGE_MODULE(self.module)
start = self.TransformPoint(x, y)
if filled:
circle.SetWidth(r)
end = self.TransformPoint(x, y + r/2)
else:
circle.SetWidth(self.dc['width'])
end = self.TransformPoint(x, y + r)
circle.SetLayer(self.dc['layer'])
circle.SetShape(pcbnew.S_CIRCLE)
circle.SetStartEnd(start, end)
self.module.Add(circle)
def Arc(self, cx, cy, sx, sy, a):
"""
Draw an arc based on centre, start and angle
The transform matrix is applied
Note that this won't work properly if the result is not a
circular arc (eg a horzontal scale)
"""
circle = pcbnew.EDGE_MODULE(self.module)
circle.SetWidth(self.dc['width'])
center = self.TransformPoint(cx, cy)
start = self.TransformPoint(sx, sy)
circle.SetLayer(self.dc['layer'])
circle.SetShape(pcbnew.S_ARC)
# check if the angle needs to be reverse (a flip scaling)
if cmp(self.dc['transform'][0], 0) != cmp(self.dc['transform'][4], 0):
a = -a
circle.SetAngle(a)
circle.SetStartEnd(center, start)
self.module.Add(circle)
# extends from (x1,y1) right
def HLine(self, x, y, l):
"""
Draw a horizontal line from (x,y), rightwards
"""
self.Line(x, y, x + l, y)
def VLine(self, x, y, l):
"""
Draw a vertical line from (x1,y1), downwards
"""
self.Line(x, y, x, y + l)
def Polyline(self, pts, mirrorX=None, mirrorY=None):
"""
Draw a polyline, optinally mirroring around the given points
"""
def _PolyLineInternal(pts):
if len(pts) < 2:
return
for i in range(0, len(pts) - 1):
self.Line(pts[i][0], pts[i][1], pts[i+1][0], pts[i+1][1])
_PolyLineInternal(pts) # original
if mirrorX is not None:
self.TransformFlip(mirrorX, 0, self.flipX)
_PolyLineInternal(pts)
self.PopTransform()
if mirrorY is not None:
self.TransformFlipOrigin(0, mirrorY, self.flipY)
_PolyLineInternal(pts)
self.PopTransform()
if mirrorX is not None and mirrorY is not None:
self.TransformFlip(mirrorX, mirrorY, self.flipBoth) # both
_PolyLineInternal(pts)
self.PopTransform()
def Reference(self, x, y, size):
"""
Draw the module's reference as the given point.
The actual setting of the reference is not done in this drawing
aid - that is up to the wizard
"""
text_size = pcbnew.wxSize(size, size)
self.module.Reference().SetPos0(self.TransformPoint(x, y))
self.module.Reference().SetTextPosition(
self.module.Reference().GetPos0())
self.module.Reference().SetSize(text_size)
def Value(self, x, y, size):
"""
As for references, draw the module's value
"""
text_size = pcbnew.wxSize(size, size)
self.module.Value().SetPos0(self.TransformPoint(x, y))
self.module.Value().SetTextPosition(self.module.Value().GetPos0())
self.module.Value().SetSize(text_size)
def Box(self, x, y, w, h):
"""
Draw a rectangular box, centred at (x,y), with given width and
height
"""
pts = [[x - w/2, y - h/2], # left
[x + w/2, y - h/2], # right
[x + w/2, y + h/2], # bottom
[x - w/2, y + h/2], # top
[x - w/2, y - h/2]] # close
self.Polyline(pts)
def NotchedCircle(self, x, y, r, notch_w, notch_h):
"""
Circle radus r centred at (x, y) with a raised or depressed notch
at the top
Notch height is measured from the top of the circle radius
"""
# find the angle where the notch vertical meets the circle
angle_intercept = math.asin(notch_w/(2 * r))
# and find the co-ords of this point
sx = math.sin(angle_intercept) * r
sy = -math.cos(angle_intercept) * r
# NOTE: this may be out by a factor of ten one day
arc_angle = (math.pi * 2 - angle_intercept * 2) * (1800/math.pi)
self.Arc(x,y, sx, sy, arc_angle)
pts = [[sx, sy],
[sx, -r - notch_h],
[-sx, -r - notch_h],
[-sx, sy]]
self.Polyline(pts)
def NotchedBox(self, x, y, w, h, notchW, notchH):
"""
Draw a box with a notch in the top edge
"""
# limit to half the overall width
notchW = min(x + w/2, notchW)
# draw notch
self.Polyline([ # three sides of box
(x - w/2, y - h/2),
(x - w/2, y + h/2),
(x + w/2, y + h/2),
(x + w/2, y - h/2),
# the notch
(notchW/2, y - h/2),
(notchW/2, y - h/2 + notchH),
(-notchW/2, y - h/2 + notchH),
(-notchW/2, y - h/2),
(x - w/2, y - h/2)
])
def BoxWithDiagonalAtCorner(self, x, y, w, h,
setback=pcbnew.FromMM(1.27), flip=flipNone):
"""
Draw a box with a diagonal at the top left corner
"""
self.TransformFlip(x, y, flip, push=True)
pts = [[x - w/2 + setback, y - h/2],
[x - w/2, y - h/2 + setback],
[x - w/2, y + h/2],
[x + w/2, y + h/2],
[x + w/2, y - h/2],
[x - w/2 + setback, y - h/2]]
self.Polyline(pts)
self.PopTransform()
def BoxWithOpenCorner(self, x, y, w, h,
setback=pcbnew.FromMM(1.27), flip=flipNone):
"""
Draw a box with an opening at the top left corner
"""
self.TransformTranslate(x, y)
self.TransformFlipOrigin(flip)
pts = [[- w/2, - h/2 + setback],
[- w/2, + h/2],
[+ w/2, + h/2],
[+ w/2, - h/2],
[- w/2 + setback, - h/2]]
self.Polyline(pts)
self.PopTransform(num=2)
def MarkerArrow(self, x, y, direction=dirN, width=pcbnew.FromMM(1)):
"""
Draw a marker arrow facing in the given direction, with the
point at (x,y)
Direction of 0 is north
"""
self.TransformTranslate(x, y)
self.TransformRotationOrigin(direction)
pts = [[0, 0],
[width / 2, width / 2],
[-width / 2, width / 2],
[0, 0]]
self.Polyline(pts)
self.PopTransform(2)