*BLENDER*

*Blender*

Blender Python Scripts

AnimationMeshIntersections.py

import bpy
import bmesh
from mathutils.bvhtree import BVHTree


# Set the frame range
start_frame = 100
end_frame = 150

# Get the objects you want to test
obj1 = bpy.data.objects['walkway']
#obj2 = bpy.data.objects['Ex Bridge']
obj2 = bpy.data.objects['Handrail']



def get_bvh(obj):
    mesh = obj.to_mesh()
    bm = bmesh.new()
    bm.from_mesh(mesh)
    bm.transform(obj.matrix_world)
    bvh = BVHTree.FromBMesh(bm)
    bm.free()
    obj.to_mesh_clear()
    return bvh

#check every 2 frames for faster 
for frame in range(start_frame, end_frame, 2):
    print ('analyzing frame ' + str(frame) + '...')
    bpy.context.scene.frame_set(frame)
    
    bvh1 = get_bvh(obj1)
    bvh2 = get_bvh(obj2)
    
    inters = bvh1.overlap(bvh2)
    if inters:
        print(f"⚠️ ⚠️ Intersection detected at frame {frame}")