Support body generation method, 3D printer, computer device and storage medium

Abstract

The invention provides a support body generation method, a 3D printer, a computer device and a computer readable storage medium. The support body generation method comprises the following steps: determining the length, the width and the minimum point coordinate of a bounding rectangle in an XY-axis plane according to the bounding box size of a triangular mesh model; constructing a 2D grid parallel to an X-axis plane and a Y-axis plane; calculating an XY direction threshold value of each square block in the 2D mesh and an XY direction threshold value of each triangular surface in the triangular mesh model; comparing the XY-direction boundary value of the triangular facet with the XY-direction boundary value of the square block, and adding the index information of the triangular facet falling into the square block to an index list of the triangular facet; and when the collision condition of a straight line parallel to the Z axis and the triangular mesh model is detected, carrying out intersection operation on the straight line and the triangular surface in the index list of the square block to which the straight line belongs, and determining the triangular surface needing to be supported. According to the method, collision detection is carried out by converting a 3D triangular mesh model into a 2D triangular mesh model, and the detection speed is increased by constructing a 2D mesh.

Description

technical field [0001] The present invention relates to the field of three-dimensional (Three Dimensions, 3D) printing, and in particular to a method for generating a support body, a 3D printer, a computer device, and a computer-readable storage medium. Background technique [0002] 3D printing is rapid prototyping technology, which is a cumulative manufacturing technology, also known as additive manufacturing. It is based on a digital model file, using special wax, powdered metal or plastic, etc. Layers of bonding material to create three-dimensional objects. Commonly used 3D printing technologies include Fused Deposition Modeling (Fused Deposition Modeling, FDM), Digital Light Processing (Digital Light Processing, DLP) and so on. These technologies generally cut the model into many parallel layers in a discrete manner, and then solidify the entire model layer by layer. The molding effect of the current layer will depend on the molding of the previous layer, and there is g...

AI Technical Summary

Problems solved by technology

These technologies generally cut the model into many parallel layers in a discrete manner, and then solidify the entire model layer by layer. The molding effect of the current layer will depend on the molding of the previous layer, and there is generally a gap between each layer. A process of continuous change, if there is a sudden change in some parts between the two layers, it may cause printing failure

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