first try for calculate from stl

backend/calculator.py

@@ -0,0 +1,63 @@
+import trimesh
+import sys
+
+def calcola_volumi(volume_totale, superficie, wall_line_width=0.4, wall_line_count=3,
+                   layer_height=0.2, infill_percentage=0.15):
+    # Volume perimetrale stimato = superficie * spessore parete
+    spessore_parete = wall_line_width * wall_line_count
+    volume_pareti = superficie * spessore_parete
+
+    # Volume interno (infill)
+    volume_infill = (volume_totale - volume_pareti) * infill_percentage
+    volume_effettivo = volume_pareti + max(volume_infill, 0)
+
+    return volume_effettivo, volume_pareti, max(volume_infill, 0)
+
+def calcola_peso(volume_mm3, densita_g_cm3=1.24):
+    densita_g_mm3 = densita_g_cm3 / 1000
+    return volume_mm3 * densita_g_mm3
+
+def calcola_costo(peso_g, prezzo_kg=20.0):
+    return round((peso_g / 1000) * prezzo_kg, 2)
+
+def stima_tempo(volume_mm3 ):
+    velocita_mm3_min = 0.4 *0.2 * 100 *60 # mm/s * mm * 60 s/min
+    tempo_minuti = volume_mm3 / velocita_mm3_min
+    return round(tempo_minuti, 1)
+
+def main(percorso_stl):
+    try:
+        mesh = trimesh.load(percorso_stl)
+        volume_modello = mesh.volume
+        superficie = mesh.area
+
+        volume_stampa, volume_pareti, volume_infill = calcola_volumi(
+            volume_totale=volume_modello,
+            superficie=superficie,
+            wall_line_width=0.4,
+            wall_line_count=3,
+            layer_height=0.2,
+            infill_percentage=0.15
+        )
+
+        peso = calcola_peso(volume_stampa)
+        costo = calcola_costo(peso)
+        tempo = stima_tempo(volume_stampa)
+
+        print(f"Volume STL: {volume_modello:.2f} mm³")
+        print(f"Superficie esterna: {superficie:.2f} mm²")
+        print(f"Volume stimato pareti: {volume_pareti:.2f} mm³")
+        print(f"Volume stimato infill: {volume_infill:.2f} mm³")
+        print(f"Volume totale da stampare: {volume_stampa:.2f} mm³")
+        print(f"Peso stimato: {peso:.2f} g")
+        print(f"Costo stimato: CHF {costo}")
+        print(f"Tempo stimato: {tempo} min")
+
+    except Exception as e:
+        print("Errore durante l'elaborazione:", e)
+
+if __name__ == "__main__":
+    if len(sys.argv) != 2:
+        print("Uso: python calcolatore_stl.py modello.stl")
+    else:
+        main(sys.argv[1])

backend/main.py

@@ -1,16 +1,72 @@
-from fastapi import FastAPI
+import io
+import trimesh
+from fastapi import FastAPI, UploadFile, File, HTTPException
 from fastapi.middleware.cors import CORSMiddleware
 
 app = FastAPI()
 
 app.add_middleware(
     CORSMiddleware,
-    allow_origins=["*"],  # oppure ["http://localhost:4200"] se vuoi essere più restrittivo
+    allow_origins=["*"],
     allow_credentials=True,
     allow_methods=["*"],
     allow_headers=["*"],
 )
 
-@app.get("/api/hello")
+def calculate_volumes(total_volume_mm3: float,
-def hello():
+                      surface_area_mm2: float,
-    return {"message": "Hello from Python API"}
+                      nozzle_width_mm: float = 0.4,
+                      wall_line_count: int = 3,
+                      layer_height_mm: float = 0.2,
+                      infill_fraction: float = 0.15):
+    wall_thickness_mm = nozzle_width_mm * wall_line_count
+    wall_volume_mm3 = surface_area_mm2 * wall_thickness_mm
+    infill_volume_mm3 = max(total_volume_mm3 - wall_volume_mm3, 0) * infill_fraction
+    total_print_volume_mm3 = wall_volume_mm3 + infill_volume_mm3
+    return total_print_volume_mm3, wall_volume_mm3, infill_volume_mm3
+
+def calculate_weight(volume_mm3: float, density_g_cm3: float = 1.24):
+    density_g_mm3 = density_g_cm3 / 1000.0
+    return volume_mm3 * density_g_mm3
+
+def calculate_cost(weight_g: float, price_per_kg: float = 20.0):
+    return round((weight_g / 1000.0) * price_per_kg, 2)
+
+def estimate_time(volume_mm3: float,
+                  nozzle_width_mm: float = 0.4,
+                  layer_height_mm: float = 0.2,
+                  print_speed_mm_per_s: float = 100.0):
+    volumetric_speed_mm3_per_min = nozzle_width_mm * layer_height_mm * print_speed_mm_per_s * 60.0
+    return round(volume_mm3 / volumetric_speed_mm3_per_min, 1)
+
+@app.post("/calculate/stl")
+async def calculate_from_stl(file: UploadFile = File(...)):
+    if not file.filename.lower().endswith(".stl"):
+        raise HTTPException(status_code=400, detail="Please upload an STL file.")
+    try:
+        contents = await file.read()
+        mesh = trimesh.load(io.BytesIO(contents), file_type="stl")
+        model_volume_mm3 = mesh.volume
+        model_surface_area_mm2 = mesh.area
+
+        print_volume, wall_volume, infill_volume = calculate_volumes(
+            total_volume_mm3=model_volume_mm3,
+            surface_area_mm2=model_surface_area_mm2
+        )
+
+        weight_g = calculate_weight(print_volume)
+        cost_chf = calculate_cost(weight_g)
+        time_min = estimate_time(print_volume)
+
+        return {
+            "stl_volume_mm3": round(model_volume_mm3, 2),
+            "surface_area_mm2": round(model_surface_area_mm2, 2),
+            "wall_volume_mm3": round(wall_volume, 2),
+            "infill_volume_mm3": round(infill_volume, 2),
+            "print_volume_mm3": round(print_volume, 2),
+            "weight_g": round(weight_g, 2),
+            "cost_chf": cost_chf,
+            "time_min": time_min
+        }
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))

frontend/angular.json

@@ -32,6 +32,7 @@
               }
             ],
             "styles": [
+              "@angular/material/prebuilt-themes/azure-blue.css",
               "src/styles.scss"
             ],
             "scripts": []
@@ -91,6 +92,7 @@
               }
             ],
             "styles": [
+              "@angular/material/prebuilt-themes/azure-blue.css",
               "src/styles.scss"
             ],
             "scripts": []

frontend/package-lock.json

@@ -8,10 +8,12 @@
       "name": "frontend",
       "version": "0.0.0",
       "dependencies": {
+        "@angular/cdk": "^19.2.16",
         "@angular/common": "^19.2.0",
         "@angular/compiler": "^19.2.0",
         "@angular/core": "^19.2.0",
         "@angular/forms": "^19.2.0",
+        "@angular/material": "^19.2.16",
         "@angular/platform-browser": "^19.2.0",
         "@angular/platform-browser-dynamic": "^19.2.0",
         "@angular/router": "^19.2.0",
@@ -493,6 +495,21 @@
         "node": "^10 || ^12 || >=14"
       }
     },
+    "node_modules/@angular/cdk": {
+      "version": "19.2.16",
+      "resolved": "https://registry.npmjs.org/@angular/cdk/-/cdk-19.2.16.tgz",
+      "integrity": "sha512-67nbWqoiZIBc8nEaCn7GHd02bM5T9qAbJ5w+Zq4V19CL3oCtrCrS4CV3Lsoi5HETSmn4iZcYS/Dph8omCvNkew==",
+      "license": "MIT",
+      "dependencies": {
+        "parse5": "^7.1.2",
+        "tslib": "^2.3.0"
+      },
+      "peerDependencies": {
+        "@angular/common": "^19.0.0 || ^20.0.0",
+        "@angular/core": "^19.0.0 || ^20.0.0",
+        "rxjs": "^6.5.3 || ^7.4.0"
+      }
+    },
     "node_modules/@angular/cli": {
       "version": "19.2.12",
       "resolved": "https://registry.npmjs.org/@angular/cli/-/cli-19.2.12.tgz",
@@ -666,6 +683,23 @@
         "rxjs": "^6.5.3 || ^7.4.0"
       }
     },
+    "node_modules/@angular/material": {
+      "version": "19.2.16",
+      "resolved": "https://registry.npmjs.org/@angular/material/-/material-19.2.16.tgz",
+      "integrity": "sha512-SSky/3MBOTdCBWOEffmVdnnKaCX6T4r3CqK2TJCLqWsHarPz5jovYIacfOe1RJzXijmDxXK5+VYhS64PNJaa6g==",
+      "license": "MIT",
+      "dependencies": {
+        "tslib": "^2.3.0"
+      },
+      "peerDependencies": {
+        "@angular/cdk": "19.2.16",
+        "@angular/common": "^19.0.0 || ^20.0.0",
+        "@angular/core": "^19.0.0 || ^20.0.0",
+        "@angular/forms": "^19.0.0 || ^20.0.0",
+        "@angular/platform-browser": "^19.0.0 || ^20.0.0",
+        "rxjs": "^6.5.3 || ^7.4.0"
+      }
+    },
     "node_modules/@angular/platform-browser": {
       "version": "19.2.11",
       "resolved": "https://registry.npmjs.org/@angular/platform-browser/-/platform-browser-19.2.11.tgz",
@@ -11226,7 +11260,6 @@
       "version": "7.3.0",
       "resolved": "https://registry.npmjs.org/parse5/-/parse5-7.3.0.tgz",
       "integrity": "sha512-IInvU7fabl34qmi9gY8XOVxhYyMyuH2xUNpb2q8/Y+7552KlejkRvqvD19nMoUW/uQGGbqNpA6Tufu5FL5BZgw==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "entities": "^6.0.0"
@@ -11267,7 +11300,6 @@
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/entities/-/entities-6.0.0.tgz",
       "integrity": "sha512-aKstq2TDOndCn4diEyp9Uq/Flu2i1GlLkc6XIDQSDMuaFE3OPW5OphLCyQ5SpSJZTb4reN+kTcYru5yIfXoRPw==",
-      "dev": true,
       "license": "BSD-2-Clause",
       "engines": {
         "node": ">=0.12"

frontend/package.json

@@ -10,10 +10,12 @@
   },
   "private": true,
   "dependencies": {
+    "@angular/cdk": "^19.2.16",
     "@angular/common": "^19.2.0",
     "@angular/compiler": "^19.2.0",
     "@angular/core": "^19.2.0",
     "@angular/forms": "^19.2.0",
+    "@angular/material": "^19.2.16",
     "@angular/platform-browser": "^19.2.0",
     "@angular/platform-browser-dynamic": "^19.2.0",
     "@angular/router": "^19.2.0",
@@ -34,4 +36,4 @@
     "karma-jasmine-html-reporter": "~2.1.0",
     "typescript": "~5.7.2"
   }
-}
+}

frontend/src/app/calculator/calculator.component.html

@@ -1,2 +1,37 @@
-<h2>Calculator Component</h2>
+<mat-card>
-<p>{{ message }}</p>
+  <mat-card-title>3D Print Cost Calculator</mat-card-title>
+
+  <input
+    type="file"
+    accept=".stl"
+    (change)="onFileSelected($event)"
+  />
+
+  <button
+    mat-raised-button
+    color="primary"
+    (click)="uploadAndCalculate()"
+    [disabled]="!file || loading"
+  >
+    {{ loading ? 'Calculating...' : 'Calculate' }}
+  </button>
+
+  <mat-progress-spinner
+    *ngIf="loading"
+    diameter="30"
+    mode="indeterminate"
+  ></mat-progress-spinner>
+
+  <p *ngIf="error" class="error">{{ error }}</p>
+
+  <div *ngIf="results">
+    <p>Volume STL: {{ results.stl_volume_mm3 }} mm³</p>
+    <p>Superficie: {{ results.surface_area_mm2 }} mm²</p>
+    <p>Volume pareti: {{ results.wall_volume_mm3 }} mm³</p>
+    <p>Volume infill: {{ results.infill_volume_mm3 }} mm³</p>
+    <p>Volume stampa: {{ results.print_volume_mm3 }} mm³</p>
+    <p>Peso stimato: {{ results.weight_g }} g</p>
+    <p>Costo stimato: CHF {{ results.cost_chf }}</p>
+    <p>Tempo stimato: {{ results.time_min }} min</p>
+  </div>
+</mat-card>

frontend/src/app/calculator/calculator.component.ts

@@ -1,20 +1,62 @@
-import { Component, OnInit } from '@angular/core';
+// calculator.component.ts
+import { Component } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { FormsModule } from '@angular/forms';
 import { HttpClient } from '@angular/common/http';
+import { MatCardModule } from '@angular/material/card';
+import { MatFormFieldModule } from '@angular/material/form-field';
+import { MatButtonModule } from '@angular/material/button';
+import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
 
 @Component({
   selector: 'app-calculator',
+  standalone: true,
+  imports: [
+    CommonModule,
+    FormsModule,
+    MatCardModule,
+    MatFormFieldModule,
+    MatButtonModule,
+    MatProgressSpinnerModule
+  ],
   templateUrl: './calculator.component.html',
-  styleUrls: ['./calculator.component.css']
+  styleUrls: ['./calculator.component.scss']
 })
-export class CalculatorComponent implements OnInit {
+export class CalculatorComponent {
-  message = '';
+  file: File | null = null;
+  results: any = null;
+  error = '';
+  loading = false;
 
   constructor(private http: HttpClient) {}
 
-  ngOnInit(): void {
+  onFileSelected(event: Event): void {
-    this.http.get<{ message: string }>('http://localhost:8000/api/hello')
+    const input = event.target as HTMLInputElement;
-      .subscribe(response => {
+    if (input.files && input.files.length > 0) {
-        this.message = response.message;
+      this.file = input.files[0];
+      this.results = null;
+      this.error = '';
+    }
+  }
+
+  uploadAndCalculate(): void {
+    if (!this.file) {
+      this.error = 'Seleziona un file STL prima di procedere.';
+      return;
+    }
+    const formData = new FormData();
+    formData.append('file', this.file);
+    this.loading = true;
+    this.http.post<any>('http://localhost:8000/calculate/stl', formData)
+      .subscribe({
+        next: res => {
+          this.results = res;
+          this.loading = false;
+        },
+        error: err => {
+          this.error = err.error?.detail || err.message;
+          this.loading = false;
+        }
       });
   }
 }

frontend/src/index.html

@@ -6,6 +6,8 @@
   <base href="/">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <link rel="icon" type="image/x-icon" href="favicon.ico">
+  <link href="https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500&display=swap" rel="stylesheet">
+  <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
 </head>
 <body>
   <app-root></app-root>

frontend/src/styles.scss

@@ -1 +1,4 @@
 /* You can add global styles to this file, and also import other style files */
+
+html, body { height: 100%; }
+body { margin: 0; font-family: Roboto, "Helvetica Neue", sans-serif; }