skidl.geometry module

class skidl.geometry.BBox(*pts)

Bases: object

add(*objs)

Update the bounding box size by adding Point/BBox objects.

property area

Return area of bounding box.

property ctr

Return center point of bounding box.

property h

Return the bounding box height.

intersection(bbox)

Return the bounding box of the intersection between the two bounding boxes.

intersects(bbox)

Return True if the two bounding boxes intersect.

is_inside(pt)

Return True if point is inside bounding box.

property ll

Return lower-left point of bounding box.

property lr

Return lower-right point of bounding box.

resize(vector)

Expand/contract the bounding box by applying vector to its corner points.

round()

snap_resize(grid_spacing)

Resize bbox so max and min points are on grid.

Parameters:

grid_spacing (float) – Grid spacing.

property ul

Return upper-left point of bounding box.

property ur

Return upper-right point of bounding box.

property w

Return the bounding box width.

class skidl.geometry.Point(x, y)

Bases: object

flip_xy()

Flip X-Y coordinates of point.

property magnitude

Get the distance of the point from the origin.

mask(msk)

Multiply the X & Y coords by the elements of msk.

max(pt)

Return a Point with coords that are the max x,y of both points.

min(pt)

Return a Point with coords that are the min x,y of both points.

property norm

Return a unit vector pointing from the origin to the point.

round()

snap(grid_spacing)

Snap point x,y coords to the given grid spacing.

xprod(pt)

Cross-product of two 2D vectors returns scalar in Z coord.

class skidl.geometry.Segment(p1, p2)

Bases: object

flip_xy()

Flip the X-Y coordinates of the segment.

intersects(other)

Return true if the segments intersect.

round()

shadows(other)

Return true if two segments overlap each other even if they aren’t on the same horiz or vertical track.

class skidl.geometry.Tx(a=1, b=0, c=0, d=1, dx=0, dy=0)

Bases: object

flip_x()

Return Tx with X coords flipped around (0, 0).

flip_y()

Return Tx with Y coords flipped around (0, 0).

classmethod from_symtx(symtx)

Return a Tx() object that implements the “HVLR” geometric operation sequence.

Parameters:

symtx (str) – A string of H, V, L, R operations that are applied in sequence left-to-right.

Returns:

A transformation matrix that implements the sequence of geometric operations.

Return type:

Tx

move(vec)

Return Tx with movement vector applied.

no_translate()

Return Tx with translation set to (0,0).

property origin

Return the (dx, dy) translation as a Point.

rot(degs)

Return Tx rotated by the given angle (in degrees).

rot_90cw()

Return Tx with 90-deg clock-wise rotation around (0, 0).

property scale

Return the scaling factor.

skidl.geometry.Vector

alias of Point

skidl.geometry.to_mils(mm)

Convert millimeters to thousandths-of-inch and return.

skidl.geometry.to_mms(mils)

Convert thousandths-of-inch to millimeters and return.