pillow-technical-drawing

name	pillow-technical-drawing
description	Creating technical diagrams and exploded-view illustrations using Python Pillow with geometric primitives and text annotations.

Technical Drawing with Pillow

Setup

pip install Pillow

Key Patterns

Rounded Rectangles (component layers)

from PIL import Image, ImageDraw, ImageFont

img = Image.new('RGB', (1800, 2400), '#F5F4ED')
draw = ImageDraw.Draw(img)

# Rounded rectangle for a component layer
draw.rounded_rectangle([x1, y1, x2, y2], radius=12, fill='#D97757', outline='#141413', width=2)

Exploded-View Layout

• Stack layers vertically with consistent vertical gaps (60-100px)
• Offset each layer slightly on the X-axis for 3D depth illusion
• Use isometric-style parallelogram shapes for depth perception

Annotation Leader Lines

# Thin annotation line from component to label
draw.line([(comp_x, comp_y), (label_x, label_y)], fill='#B0ADA5', width=1)
# Small circle at the component end
draw.ellipse([comp_x-3, comp_y-3, comp_x+3, comp_y+3], fill='#B0ADA5')

Text Labels

font_heading = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf", 72)
font_label = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf", 24)
draw.text((x, y), "NOVA", fill='#141413', font=font_heading)

Isometric 3D Effect with Polygons

# Create parallelogram for isometric top face
top_face = [(x, y), (x+w, y-skew), (x+w+d, y-skew+d), (x+d, y+d)]
draw.polygon(top_face, fill=color, outline='#141413', width=1)

Saving

img.save('output.png', dpi=(300, 300))