server-side message position validation with o3d

api/api.py

@@ -4,8 +4,11 @@ from uuid import uuid4
 import sqlite3
 import numbers
 from flask import g
+import open3d
+import numpy
 
 DATABASE = './forum.db'
+TERRAIN_MODEL = './terrain.glb'
 
 def get_db():
     db = getattr(g, '__database', None)
@@ -15,6 +18,13 @@ def get_db():
 
 app = Flask(__name__)
 
+terrain_mesh = open3d.io.read_triangle_mesh('./terrain.glb')
+terrain_mesh = open3d.t.geometry.TriangleMesh.from_legacy(terrain_mesh)
+print('loaded terrain mesh')
+scene = open3d.t.geometry.RaycastingScene()
+_ = scene.add_triangles(terrain_mesh)
+print('created raycasting scene')
+
 @app.teardown_appcontext
 def close_connection(_):
     db = getattr(g, '__database', None)
@@ -41,6 +51,11 @@ def new_message():
     for elem in position:
         if not isinstance(elem, numbers.Number):
             return Response(status=HTTPStatus.BAD_REQUEST)
+    query_point = open3d.core.Tensor([position], dtype=open3d.core.Dtype.Float32)
+    unsigned_distance = scene.compute_distance(query_point)
+    print(unsigned_distance)
+    if unsigned_distance > 0.25:
+        return Response(status=HTTPStatus.BAD_REQUEST)
     position = json.dumps(position)
     message = str(request.form['message'])
     token = request.form['token']

src/components/ground.jsx

@@ -5,14 +5,15 @@ import { useGLTF } from '@react-three/drei';
 import terrainModelURL from '../assets/terrain.glb';
 
 export default function Ground() {
-    const meshRef = useRef();
-    const { nodes } = useGLTF(terrainModelURL);
-    
+    const { nodes, materials } = useGLTF(terrainModelURL);
     return (
         <RigidBody type='fixed' colliders="trimesh">
-            <mesh ref={meshRef} position={[0, 0, 0]} rotation={[-Math.PI / 2, 0, 0]} geometry={nodes.Plane.geometry} name='ground'>
+            <mesh position={[0, 0, 0]} geometry={nodes.ground.geometry} name='ground'>
                 <meshStandardMaterial color={everforest.yellow}/>
             </mesh>
+            <mesh geometry={nodes.pyramid.geometry} name='ground'>
+                <meshStandardMaterial color={everforest.bg2}/>
+            </mesh>
         </RigidBody>
     );
 }