Thickness AA Dimension

Thickness Dimensions
horizontal 0°	horizontal 180°	vertical 90°	vertical 270°

Properties Thickness AA Dimension

The properties are similar to the inner dimension, but the thickness and angle have now been added and the finishing point removed.

Show/Hide thickness_dim_aa Attributes

• im

  PIL image handle, link to the calling program

• ptA

  Start coordinates

• thick

  Thickness of item

• angle

  Slope of Dimension, changes text position, default horizontal 0°

• text

  Text to be written next to the dimension

• font

  Font of the text

• fill

  Line colour, RGB tuple

• arrowhead

  Three integer tuple describing the shape and size of the arrow

• arrow

  position of the arrow on the line, which influences the direction it points.

• back

  Background colour, RGB tuple

The thickness dimension draws a small line between the inner and outer surfaces, two inward pointing arrows are added to the ends of the connecting line. Text is added that lies along the outer surface, dimension_aa provides the arrows.

If the distance between the surfaces is large then use the inner dimension and the arrows then point outwards.

Show/Hide Code test_thick_aa_dim.py

import sys
sys.path.append('../dims')

from PIL import Image, ImageDraw, ImageFont
from math import cos, sin, radians
from DimLinesPIL import polar2cart, angled_text
from DimLinesAA import dimension_aa


def thickness_dim_aa(im, dr, ptA, thick, angle=0, text=None, font=None, fill=(0,0,0),
              arrowhead=(8, 10, 3), back=(255,255,221)):
    phir = radians(angle)
    ptB = int(ptA[0] + thick * cos(phir) + 0.5), \
          int(ptA[1] + thick * sin(phir) + 0.5)

    dr.line([ptA, ptB], width=1, fill=fill)

    dimension_aa(im, dr, ptA, angle=angle, arrow='last',fill=fill,back=back)
    dimension_aa(im, dr, ptB, angle=angle, arrow='first',fill=fill,back=back)

    # thickness of item
    # (wide, height) = font.getsize(text)
    unused1, unused2, wide, height = font.getbbox(text)
    h = height // 2
    dx = - (h + arrowhead[1] + 5) * cos(phir)
    dy = - (h + arrowhead[1] + 5) * sin(phir)

    # stop upside down text
    if 0 <= angle <= 180:
        angle = 90-angle
    elif 180 < angle < 360:
        angle = 270-angle

    at = (ptA[0] + int(dx), ptA[1] + int(dy))
    angled_text(im, at, text=text, angle=angle, font=font)


if __name__ == "__main__":
    Text = 'Test'
    Angle = 0
    At = (40, 40)
    Thick = 20
    Font = ImageFont.truetype('consola.ttf', 15)

    image2 = Image.new('RGB', (80, 80), '#FFFFDD')

    draw = ImageDraw.Draw(image2)

    a = polar2cart(At, Angle+90, 30)
    b = polar2cart(At, Angle-90, 30)
    c = polar2cart(polar2cart(At, Angle, Thick), Angle+90, 30)
    d = polar2cart(polar2cart(At, Angle, Thick), Angle-90, 30)
    draw.line([a,b], width=2, fill='blue')
    draw.line([c,d], width=2, fill='blue')

    thickness_dim_aa(image2, draw, At, Thick, angle=Angle, text=Text, font=Font)

    image2.show()
    #image2.save('../figures/thick_dim_'+str(angle)+'.png') #show()