# 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 tickness 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 # these values come from our KiCad Library Convention 0.11 defaultLineThickness = pcbnew.FromMM(0.15) def DefaultGraphicLayer(self): return pcbnew.F_SilkS def DefaultTextValueLayer(self): return pcbnew.F_Fab def __init__(self, module): self.module = module # drawing context defaults self.dc = { 'layer': self.DefaultGraphicLayer(), 'lineThickness': self.defaultLineThickness, '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 point (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 SetLineTickness(self, lineThickness): """ Set the current pen lineThickness used for subsequent drawing operations """ self.dc['lineThickness'] = lineThickness def GetLineTickness(self): """ Get the current drawing context line tickness """ return self.dc['lineThickness'] def SetLayer(self, layer): """ Set the current drawing layer, used for subsequent drawing operations """ self.dc['layer'] = layer def GetLayer(self): """ return the current drawing layer, used drawing operations """ return self.dc['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.GetLineTickness()) outline.SetLayer(self.GetLayer()) 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 thickness 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['lineThickness']) 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['lineThickness']) 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, orientation_degree = 0): """ 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) self.module.Reference().SetOrientation(orientation_degree*10) # internal angles are in 0.1 deg def Value(self, x, y, size, orientation_degree = 0): """ 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) self.module.Value().SetLayer(self.DefaultTextValueLayer()) self.module.Value().SetOrientation(orientation_degree*10) # internal angles are in 0.1 deg 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, rotate=0): """ 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 """ self.TransformRotation(x, y, rotate) # 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) self.PopTransform() def NotchedBox(self, x, y, w, h, notchW, notchH, rotate=0): """ Draw a box with a notch in the top edge """ self.TransformRotation(x, y, rotate) # 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) ]) self.PopTransform() 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)