DrTAD 4 Blender Software. Subdivide and Un-Subdivide
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The document provides an overview of Blender software, detailing its functionalities as a free and open-source 3D creation suite that supports various aspects of the 3D pipeline. It explains the processes of subdividing and un-subdividing meshes, including the rules and options available during these operations. Additionally, it includes references to the Blender manual and related research publications.
DrTAD 4 Blender Software. Subdivide and Un-Subdivide
- 1. 4. Blender software. Subdivide & Un-Subdivide Assoc. Prof. Dr. Eng. Tihomir Dovramadjiev Technical University of Varna MTF, Department Industrial Design tihomir.dovramadjiev@tu-varna.bg DOI: 10.13140/RG.2.2.23771.62242 https://www.researchgate.net/publication/328569541_4_Blender_software_Subdivide_Un-Subdivide
- 2. 2018 DrTAD 2 About Blender software ● Blender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing and motion tracking, even video editing and game creation. https://www.blender.org/ ● Modern accessible application of the system Blender in 3D de- sign practice. https://www.researchgate.net/publication/312033613_Modern_a ccessible_application_of_the_system_Blender_in_3D_design_p ractice
- 3. 2018 DrTAD 3 Subdivide Subdividing splits selected edges and faces by cutting them in half or more, adding new vertices, and subdividing accord- ingly the faces involved. It adds resolution to the mesh by divide faces or edges into smaller units. ● This process follows a few rules, depending on the settings: ● When only one edge of a face is selected (Triangle mode), triangles are subdivided into two triangles, and quads, into three triangles. ● When two edges of a face are selected: ● If the face is a triangle, a new edge is created between the two new vertices, subdividing the triangle in a triangle and a quad. ● If the face is a quad, and the edges are neighbors, we have three possible behaviors, depending on the setting of Corner Cut Type (the select menu next to the Subdivide button, in Mesh Tools panel). See below for details. ● If the face is a quad, and the edges are opposite, the quad is just subdivided in two quads by the edge linking the two new vertices. ● When three edges of a face are selected: ● If the face is a triangle, this means the whole face is selected and it is then subdivided in four smaller triangles. ● If the face is a quad, first the two opposite edges are subdivided as described above. Then, the “middle” edge is subdivid- ed, affecting its new “sub-quad” as described above for only one edge. ● When four edges of a face (a quad) are selected, the face is subdivided into four smaller quads. ● Blender User Manual.Release 2.78. Blender Community. Mar 08, 2017 ● https://docs.blender.org/manual/en/dev/modeling/meshes/editing/subdividing/subdivide.html - CC-BY-SA 4.0 Int. License
- 4. 2018 DrTAD 4 Subdivide / Options These options are available in the Tool Panel after running the tool; Number of Cuts ● Specifies the number of cuts per edge to make. By default this is 1, cutting edges in half. A value of 2 will cut it into thirds, and so on. Smoothness ● Displaces subdivisions to maintain approximate curvature. The effect is similar to the way the Subdivision Surface Modifier might deform the mesh. ● Blender User Manual.Release 2.78. Blender Community. Mar 08, 2017 ● https://docs.blender.org/manual/en/dev/modeling/meshes/editing/subdividing/subdivide.html - CC-BY-SA 4.0 Int. License
- 5. 2018 DrTAD 5 Subdivide / Options Quad/Tri Mode. Forces subdivide to create triangles or quads instead of n-gons (see examples below). This mode doesn’t allow the use of Straight Cut on quad corners. Corner Cut Type. This select menu controls the way quads with only two adjacent selected edges are subdivided. ● Fan. The quad is subdivided in a fan of four triangles, the common vertex being the one opposite to the selected edges. ● Inner vertices. The selected edges are subdivided, then an edge is created between the two new vertices, creating a small triangle. This edge is also subdivided, and the “inner vertex” thus created is linked by another edge to the one opposite to the original selected edges. All this results in a quad subdivided in a triangle and two quads. ● Path. First an edge is created between the two opposite ends of the selected edges, dividing the quad in two triangles. Then, the same goes for the involved triangle as described above. ● Straight Cut. The selected edges are subdivided, then an edge is created between the two new vertices, creating a small triangle and n- gon. ● Blender User Manual.Release 2.78. Blender Community. Mar 08, 2017 ● https://docs.blender.org/manual/en/dev/modeling/meshes/editing/subdividing/subdivide.html - CC-BY-SA 4.0 Int. License
- 6. 2018 DrTAD 6 Subdivide / Options Fractal. Displaces the vertices in random directions after the mesh is subdivided. Along Normal. Causes the vertices to move along their normals, instead of random directions. Random Seed. Changes the random seed of the Fractal noise function, producing a different result for each seed value. ● Blender User Manual.Release 2.78. Blender Community. Mar 08, 2017 ● https://docs.blender.org/manual/en/dev/modeling/meshes/editing/subdividing/subdivide.html - CC-BY-SA 4.0 Int. License
- 7. 2018 DrTAD 7 Subdivide / Example 1 Edit Mode ● Select All (Key “A” + Subdivide) ● From left to right : Default Cube Mesh, + 1 Subdivide, + 2 Subdivide
- 8. 2018 DrTAD 8 Subdivide / Example 2 Edit Mode ● Select Top Face + Subdivide ● From left to right : Default Cube Mesh + selected face, + 1 Subdivide, + 2 Subdivide
- 9. 2018 DrTAD 9 Un – Subdivide / Example 3 Unsubdivide functions as the reverse of subdivide by attempting to remove edges that were the result of a subdivide operation. If additional editing has been done after the sub- divide operation, unexpected results may occur. ● Blender User Manual.Release 2.78. Blender Community. Mar 08, 2017 ● https://docs.blender.org/manual/en/dev/modeling/meshes/editing/subdividing/subdivide.html - CC-BY-SA 4.0 Int. License Edit Mode Sellect All and 1 Un-subdivide
- 10. 2018 DrTAD 10 References ● Blender Software https://www.blender.org/ ● Tihomir Dovramadjiev PhD. Modern accessible application of the system Blender in 3D design practice. https://www.researchgate.net/publication/312033613_Modern_accessible_application_of_the_system_Blender_in_3D_design_practice ● Blender User Manual.Release 2.78. Blender Community. Mar 08, 2017 ● Blender / Subdivide https://docs.blender.org/manual/en/dev/modeling/meshes/editing/subdividing/subdivide.html - CC-BY-SA 4.0 Int. License ● Apace OpenOffice http://www.openoffice.org/download/