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feature/text - Add text library #4

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feature/text - Add text library #4

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a326464
Create script
cessnahat Sep 16, 2021
82b96b1
Start adding fetools.text.Text class
cessnahat Oct 15, 2021
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313 changes: 313 additions & 0 deletions fetools/_text.py
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Original file line number Diff line number Diff line change
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from math import radians, sin, cos


def _getchar(c: str) -> tuple:
'''
Get the points for a character.
Returns tuple in the form (paths, width)
'''
alphanum = {
"A": [
[(-3, -5), (0,5), (3, -5)],
[(-1.5,0), (1.5,0)]
],
"B": [
[(-3,5), (1,5), (3,4), (3,1), (1,0), (3,-1), (3,-4), (1,-5), (-3,-5), (-3,5)],
[(-3,0), (1,0)]
],
"C": [
[(3,5), (-1,5), (-3,3), (-3,-3), (-1,-5), (3,-5)]
],
"D": [
[(-3,-5), (-3,5), (1,5), (3,3), (3,-3), (1,-5), (-3,-5)]
],
"E": [
[(3,5), (-3,5), (-3,-5), (3,-5)],
[(-3,0), (2, 0)]
],
"F": [
[(3,5), (-3,5), (-3,-5)],
[(-3,0), (3,0)]
],
"G": [
[(3,5), (-1,5), (-3,3), (-3,-3), (-1,-5), (3,-5), (3,0), (0,0)]
],
"H": [
[(-3,5), (-3,-5)],
[(-3,0), (3,0)],
[(3,5), (3,-5)]
],
"I": [
[(-3,5), (3,5)],
[(0,5), (0,-5)],
[(-3,-5), (3,-5)]
],
"J": [
[(-3,5), (3,5)],
[(-3,-3), (-2,-5), (0,-5), (1,-3), (1,5)]
],
"K": [
[(-3,5), (-3,-5)],
[(3,5), (-3,0), (3,-5)]
],
"L": [
[(-3,5), (-3,-5), (3,-5)]
],
"M": [
[(-3,-5), (-3,5), (0,-1), (3,5), (3,-5)]
],
"N": [
[(-3,-5), (-3,5), (3,-5), (3,5)]
],
"O": [
[(-1,-5), (-3,-3), (-3,3), (-1,5), (1,5), (3,3), (3,-3), (1,-5), (-1,-5)]
],
"P": [
[(-3,-5), (-3,5), (2,5), (3,4), (3,1), (2,0), (-3,0)]
],
"Q": [
[(-1,-5), (-3,-3), (-3,3), (-1,5), (1,5), (3,3), (3,-3), (1,-5), (-1,-5)],
[(0,0), (3,-5)]
],
"R": [
[(-3,-5), (-3,5), (2,5), (3,4), (3,1), (2,0), (-3,0), (3,-5)]
],
"S": [
[(3,5), (-1,5), (-3,3), (-3,2), (-1,0), (1,0), (3,-2), (3,-3), (1,-5), (-3,-5)]
],
"T": [
[(-3,5), (3,5)],
[(0,5), (0,-5)]
],
"U": [
[(-3,5), (-3,-3), (-1,-5), (1,-5), (3,-3), (3,5)]
],
"V": [
[(-3,5), (0,-5), (3,5)]
],
"W": [
[(-3,5), (-2,-5), (0,1), (2,-5), (3,5)]
],
"X": [
[(-3,5), (3,-5)],
[(-3,-5), (3,5)]
],
"Y": [
[(-3,5), (0,0), (3,5)],
[(0,0), (0,-5)]
],
"Z": [
[(-3,5), (3,5), (-3,-5), (3,-5)]
],
"1": [
[(-2,2), (0,5), (0,-5)],
[(-3,-5), (3,-5)]
],
"2": [
[(-3,4), (-2,5), (2,5), (3,4), (3,1), (2,0), (-2,-1), (-3,-2), (-3,-5), (3,-5)]
],
"3":[
[(-3,5), (2,5), (3,4), (3,1), (2,0), (3,-1), (3,-4), (2,-5), (-3,-5)],
[(2,0), (-2,0)]
],
"4": [
[(-3,5), (-3,0), (3,0)],
[(3,5), (3,-5)]
],
"5": [
[(3,5), (-3,5), (-3,0), (2,0), (3,-1), (3,-4), (2,-5), (-3,-5)]
],
"6": [
[(3,5), (-2,5), (-3,4), (-3,-4), (-2,-5), (2,-5), (3,-4), (3,-1), (2,0), (-3,0)]
],
"7": [
[(-3,5), (3,5), (-2,-5)]
],
"8": [
[(-2,0), (-3,1), (-3,4), (-2,5), (2,5), (3,4), (3,1), (2,0), (3,-1), (3,-4), (2,-5), (-2,-5), (-3,-4), (-3,-1), (-2,0)],
[(-2,0), (2,0)]
],
"9": [
[(-3,-5), (2,-5), (3,-4), (3,4), (2,5), (-2,5), (-3,4), (-3,1), (-2,0), (3,0)]
],
"0": [
[(-1,-5), (-3,-3), (-3,3), (-1,5), (1,5), (3,3), (3,-3), (1,-5), (-1,-5)],
[(-3,-3), (3,3)]
]
}
punc4 = {
".": [
[(-0.5,-3), (-0.5,-5), (0.5,-5), (0.5,-3), (-0.5,-3)]
# [(0,-5), (0,-2)]
],
",": [
[(0,-3), (0,-5), (-2,-8)]
],
"-": [
[(-2,0), (2,0)]
],
"(": [
[(1,6), (0,5), (-1,0), (0,-5), (1,-6)]
],
")": [
[(-1,6), (0,5), (1,0), (0,-5), (-1,-6)]
],
"!": [
[(-0.5,-3), (-0.5,-5), (0.5,-5), (0.5,-3), (-0.5,-3)],
[(0,-1), (0,6)]
],
'"': [
[(-1,5), (-1,1)],
[(1,5), (1,1)]
],
"'": [
[(0,5), (0,1)]
],
"/": [
[(2,5), (-2,-5)]
],
"\\": [
[(-2,5), (2,-5)]
],
"*": [
[(-2,5), (2,1)],
[(-2,1), (2,5)],
[(-2,3), (2,3)],
[(0,5), (0,1)]
],
":": [
[(0,3), (0,1)],
[(0,-3), (0,-1)]
]
}
punc6 = {
"_": [
[(-3,-5), (3,-5)]
],
"#": [
[(-3,3), (3,3)],
[(-3,-1), (3,-1)],
[(-1,5), (-1,-3)],
[(1,5), (1,-3)]
],
"=": [
[(-3,1), (3,1)],
[(-3,-1), (3,-1)]
],
}
if c in alphanum:
return (alphanum[c], 6)
elif c in punc4:
return (punc4[c], 4)
elif c in punc6:
return (punc6[c], 6)
else:
raise ValueError(f"{repr(c)} isn't a recognized character")


def _movept(x, y, angle, xoff, yoff):
# Rotate the point
rotx = x*cos(angle) + y*sin(angle)
roty = -x*sin(angle) + y*cos(angle)
# Translate the point
transx = rotx + xoff
transy = roty + yoff
return (transx, transy)


def _test(text, height, hdg, startx, starty):
import turtle

WIDTH = 800
angle = radians(hdg)
x, y = 0, 0
scl = height / 10

turtle.setup(WIDTH, 400)
turtle.tracer(0)
turtle.penup()
turtle.goto(x, y)

for c in text.upper():
if c == " ":
x += 10*scl
continue
paths, width = _getchar(c)
for line in paths:
# x and y for first point of next line
targx = x + line[0][0]*scl
targy = y + line[0][1]*scl
# Transform point
nextx, nexty = _movept(targx, targy, angle, startx, starty)
turtle.goto(nextx, nexty)
turtle.pendown()
for pt in line[1:]:
# x and y for next point of line
targx = x + pt[0]*scl
targy = y + pt[1]*scl
# Transform point
nextx, nexty = _movept(targx, targy, angle, startx, starty)
turtle.goto(nextx, nexty)
turtle.penup()
x += scl*(width + 4)

# turtle.goto(startx-4*scl, starty-5*scl)
# turtle.pendown()
# turtle.goto(startx-4*scl, starty+height-5*scl)
# turtle.penup()

turtle.goto(startx, starty)
turtle.tracer(1)
turtle.mainloop()


class Text:
""" Stores text as lat/lon line segments """

def __init__(self, text, height, lat=0, lon=0, heading=0):
self.text = text
self.height = height
self.lat = lat
self.lon = lon
self.heading = heading

@property
def heading(self):
return self._heading

@heading.setter
def heading(self, val):
self._heading = val % 360

def coords(self):
angle = radians(self.heading)
x, y = 0, 0
scl = self.height / 10 # (desired height / character height)
# Generate each character
coords = []
for c in self.text.upper():
# Skip spaces
if c == " ":
x += 10*scl
continue
# Get the offsets for the char
paths, width = _getchar(c)
for line in paths:
# Generate each line segment
segment = []
for pt in line:
# x and y for point of line
targx = x + pt[0]*scl
targy = y + pt[1]*scl
# Transform point
nextx, nexty = _movept(targx, targy, angle, self.lat, self.lon)
segment.append((nextx, nexty))
coords.append(segment)
x += scl*(width + 4)
return coords


if __name__ == "__main__":
_test("Testing 123", height=25, hdg=0, startx=-300, starty=0)
text = Text("A", 10)
print(text.heading)