I am facing an issue while combining two stl.

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Vijay 2024-10-29

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回答： DGM 2025-7-18

I have two 3D geometries along with their associated nodes and faces. I want to combine these two STL geometries by merging their nodes and faces into single geometry.

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Answer 1

Gayatri 2024-10-29

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Hi Vijay,

Below is a MATLAB script that demonstrates how to combine two STL into one single geometry:

% Read the STL files
shape1 = stlread('file1.stl');
shape2 = stlread('file2.stl'); 
% Extract nodes and faces from both geometries
vertices1 = shape1.Points; 
faces1 = shape1.ConnectivityList;
vertices2 = shape2.Points; 
faces2 = shape2.ConnectivityList; 
% Adjust face indices for the second geometry by adding the number of vertices from the first geometry to the second's face indices
updatedFaces2 = faces2 + size(vertices1, 1);
% Combine the vertices and faces
mergedVertices = [vertices1; vertices2];
mergedFaces = [faces1; updatedFaces2]; 
% Create a new triangulation object for the merged geometry
mergedGeometry = triangulation(mergedFaces, mergedVertices);
% Write the merged geometry to a new STL file
stlwrite(mergedGeometry, 'merged_geometry.stl');