Methods and systems for modeling apertures for additive manufacturing

A method comprising:

• generating a computational model of a three-dimensional structure, the three-dimensional structure comprising:
• a first group of slats comprising a first plurality of slats parallel to each other along a first axis;
• and
• a second group of slats comprising a second plurality of slats parallel to each other along a second axis, wherein the second group of slats intersects the first group of slats such that the second axis intersects the first axis at an angle between 30 degrees and 150 degrees relative to the first axis;
• and
• outputting instructions readable by an additive manufacturing apparatus for fabricating a substrate in accordance with the generated computation model of the three-dimensional structure, wherein the computational model of the three-dimensional structure includes overlapping areas where the first group of slats intersect with the second group of slats;
• and
• determining by the additive manufacturing apparatus, from the computational model for each layer to be deposited, whether there is material or empty space, wherein the additive manufacturing apparatus does not distinguish overlapping areas from the computational model, and wherein the computational model does not model a substrate having individual perforations without overlapping slats.

A non-transitory computer-readable media storing instructions executable by one or more signal processors, wherein the instructions, when executed, cause the one or more signal processors to perform functions comprising:

• generating a computational model of a three-dimensional structure, the three-dimensional structure comprising:
• a first group of slats comprising a first plurality of slats parallel to each other along a first axis;
• and
• a second group of slats comprising a second plurality of slats parallel to each other along a second axis, wherein the second group of slats intersects the first group of slats such that the second axis intersects the first axis at an angle between 30 degrees and 150 degrees relative to the first axis;
• outputting instructions readable by an additive manufacturing apparatus for fabricating a substrate in accordance with the generated computation model of the three-dimensional structure, wherein the computational model of the three-dimensional structure includes overlapping areas where the first group of slats intersect with the second group of slats;
• and
• determining by the additive manufacturing apparatus, from the computational model for each layer to be deposited, whether there is material or empty space, wherein the additive manufacturing apparatus does not distinguish overlapping areas from the computational model, and wherein the computational model does not model a substrate having individual perforations without overlapping slat.