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add comment about the necessary matrix calc

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Michael Kirsch 2019-07-07 15:08:04 +02:00 committed by Joseph Lenox
parent 2a476e1742
commit f695e6b668
1 changed files with 3 additions and 0 deletions
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3
xs/src/libslic3r/IO/TMF.cpp
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@ -818,6 +818,9 @@ TMFParserContext::apply_transformation(ModelInstance *instance, const Transforma
instance->offset.x = single_transformations[0];
instance->offset.y = single_transformations[1];
// Complete = Instance * Additional
// -> Instance^-1 * Complete = (Instance^-1 * Instance) * Additional
// -> Instance^-1 * Complete = Additional
instance->additional_trafo = TransformationMatrix::multiply(
instance->get_trafo_matrix().inverse(),
complete_trafo);