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import os
import numpy as np
from PIL import Image
from stl import mesh
import plotly.graph_objects as go
from flask import Flask, render_template_string, request, send_file
from werkzeug.utils import secure_filename
app = Flask(__name__)
UPLOAD_FOLDER = 'uploads'
OUTPUT_FOLDER = 'outputs'
os.makedirs(UPLOAD_FOLDER, exist_ok=True)
os.makedirs(OUTPUT_FOLDER, exist_ok=True)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
app.config['OUTPUT_FOLDER'] = OUTPUT_FOLDER
HTML_TEMPLATE = """
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>3D Model Generator for 3D Printing</title>
</head>
<body>
<h1>Upload Image to Generate 3D Printable Model</h1>
<form action="/upload" method="post" enctype="multipart/form-data">
<label>Image:</label><input type="file" name="image" required><br><br>
<input type="submit" value="Upload & Generate 3D Model">
</form>
{% if plot_div %}
<h2>3D Model Preview:</h2>
{{ plot_div|safe }}
<br>
<a href="{{ download_link }}" download>Download STL File</a>
{% endif %}
</body>
</html>
"""
def generate_3d_model(image_path, output_stl_path, scale=1.0, height_scale=5.0):
image = Image.open(image_path).convert('L')
img_array = np.array(image)
height, width = img_array.shape
x, y = np.meshgrid(np.linspace(0, width * scale, width), np.linspace(0, height * scale, height))
z = (img_array / 255.0) * height_scale
# Create vertices and faces
vertices = np.column_stack((x.flatten(), y.flatten(), z.flatten()))
faces = []
for i in range(height - 1):
for j in range(width - 1):
idx = i * width + j
faces.append([idx, idx + 1, idx + width])
faces.append([idx + 1, idx + width + 1, idx + width])
# Create STL mesh
model_mesh = mesh.Mesh(np.zeros(len(faces), dtype=mesh.Mesh.dtype))
for i, f in enumerate(faces):
for j in range(3):
model_mesh.vectors[i][j] = vertices[f[j], :]
model_mesh.save(output_stl_path)
fig = go.Figure(data=[go.Surface(z=z, x=x, y=y, colorscale='Gray')])
fig.update_layout(scene=dict(aspectratio=dict(x=1, y=1, z=0.3)), margin=dict(l=0, r=0, b=0, t=0))
return fig.to_html(full_html=False)
@app.route('/', methods=['GET'])
def index():
return render_template_string(HTML_TEMPLATE, plot_div=None, download_link=None)
@app.route('/upload', methods=['POST'])
def upload():
image = request.files['image']
image_path = os.path.join(app.config['UPLOAD_FOLDER'], secure_filename(image.filename))
image.save(image_path)
stl_filename = os.path.splitext(image.filename)[0] + '.stl'
output_stl_path = os.path.join(app.config['OUTPUT_FOLDER'], stl_filename)
plot_div = generate_3d_model(image_path, output_stl_path)
download_link = f"/download/{stl_filename}"
return render_template_string(HTML_TEMPLATE, plot_div=plot_div, download_link=download_link)
@app.route('/download/<filename>')
def download_file(filename):
return send_file(os.path.join(app.config['OUTPUT_FOLDER'], filename), as_attachment=True)
if __name__ == '__main__':
app.run(debug=True)
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