Part comparison script for Materialise 3-matic

compare_part.py

# This script will compare two objects and see if they are similar or not. This is especially useful when setting up a validation environment. 
# Input: String name of the two objects which you would like to compare: object_a and object_b
# Output: Logger messages with the outcome of the part comparison.
#         The tool compares the following criteria:
#         The tool compares the following criteria:
#         - Surface area, volume, amount of nodes, amount of triangles
#         - It compares the x,y,z coordinate of the nodes with the same index 
#         - It compares if each triangle is referring to the same node number. 
# Author: Kristof Godelaine (Materialise)
# Version: 1.0 (25 Aug 2017)


def compare_part(object_a, object_b):
    name_part_a = object_a
    name_part_b = object_b


    #find parts in the object tree
    part_a = trimatic.find_part(name_part_a)
    part_b = trimatic.find_part(name_part_b)

    #list for the part comparison outcome
    part_comp_list = {'surf_area': 'not performed','volume': 'not performed','num_points': 'not performed', 'num_triangles': 'not performed', 'node_comparison': 'not performed', 'triangles_comparison': 'not performed'}

    #get nodes and triangles of the parts
    [points_a, triangles_a] = part_a.get_triangles()
    [points_b, triangles_b] = part_b.get_triangles()

    #Check surface area
    if part_a.surface_area == part_b.surface_area:
        part_comp_list['surf_area'] = 'pass'
    else:
        part_comp_list['surf_area'] = 'fail'

    #Check volume
    if part_a.volume == part_b.volume:
        part_comp_list['volume'] = 'pass'
    else:
        part_comp_list['volume'] = 'fail'

    #check number of nodes
    if len(points_a) == len(points_b):
        part_comp_list['num_points'] = 'pass'
    else:
        part_comp_list['num_points'] = 'fail'

    #check number of triangles
    if len(triangles_a) == len(triangles_b):
        part_comp_list['num_triangles'] = 'pass'
    else:
        part_comp_list['num_triangles'] = 'fail'

    #Compare each node of two parts
    for i in range(0,len(points_a)):
        xa = points_a[i][0]
        ya = points_a[i][1]
        za = points_a[i][2]
        xb = points_b[i][0]
        yb = points_b[i][1]
        zb = points_b[i][2]
        if xa != xb:
            part_comp_list['node_comparison'] = 'fail'
            break
        elif ya != yb:
            part_comp_list['node_comparison'] = 'fail'
            break
        elif za != zb:
            part_comp_list['node_comparison'] = 'fail'
            break
        else:
            part_comp_list['node_comparison'] = 'pass'

    #Compare elements of two parts
    for i in range(0,len(triangles_a)):
        xa = triangles_a[i][0]
        ya = triangles_a[i][1]
        za = triangles_a[i][2]
        xb = triangles_b[i][0]
        yb = triangles_b[i][1]
        zb = triangles_b[i][2]
        if xa != xb:
            part_comp_list['triangles_comparison'] = 'fail'
            break
        elif ya != yb:
            part_comp_list['triangles_comparison'] = 'fail'
            break
        elif za != zb:
            part_comp_list['triangles_comparison'] = 'fail'
            break
        else:
            part_comp_list['triangles_comparison'] = 'pass'


    ###
    #print results
    print("----------------------------------")
    print("----------------------------------")
    print("Part comparison outcome")
    print("----------------------------------")
    print("-surf_area: "+ part_comp_list['surf_area'])
    print("-volume: "+ part_comp_list['volume'])
    print("-num_points: "+ part_comp_list['num_points'])
    print("-num_triangles: "+ part_comp_list['num_triangles'])
    print("-node_comparison: "+ part_comp_list['node_comparison'])
    print("-triangles_comparison: "+ part_comp_list['triangles_comparison'])
    print("----------------------------------")