Change Details

This implements the main unsubdivide algorithm which rebuilds a base mesh and extracts the grid's data from a high resolution mesh. It includes the Rebuild Subdivisions operator, which generates all subdivision levels down to the level 0 base mesh. What works: - Rebuilding an arbitrary number of levels or as many levels as possible down to level 0 in a single step (not available in the main function, but very easy to enable).- - Meshes with n-gons and triangles - Base mesh made completely out of triangles - Meshes without poles - Meshes with multiple disconnected elements at the same subdivision level What does not work: - It is still not copying the data to the original grids, so it does nothing. - The mesh should not have higher level grids. Merging the existing grids into the new ones should not be hard, but not a priority right now for importing. It can also be implemented with a delete lower operator. - On meshes with quads sharing 2 edges it can't reconstruct level 0, it will stop at level 1 with two triangles (like Suzane). This is something that should not happen that often in a real use case. The main function of the algorithm is ##multires_unsubdivide_to_basemesh## It expects an already subdivided mesh (original_mesh) and it will output the level 0 base mesh and an array of ##MultiresUnsubdivideGrid## indexed per base mesh loop. These structs contain the coordinates in object space in the correct order to build the grid for each loop.

This implements the main unsubdivide algorithm which rebuilds a base mesh and extracts the grid's data from a high resolution mesh. It includes the Rebuild Subdivisions operator, which generates all subdivision levels down to the level 0 base mesh. {F8464719} What works: - Rebuilding an arbitrary number of levels or as many levels as possible down to level 0 in a single step (not available in the main function, but very easy to enable).- - Meshes with n-gons and triangles - Base mesh made completely out of triangles - Meshes without poles - Meshes with multiple disconnected elements at the same subdivision level What does not work: - It seems to fail in some cases when the base mesh has triangles or ngons. The base mesh reconstruction is correct and the grids coordinates extraction also seems correct, but the mesh explodes when changing subdivision levels. - The mesh should not have higher level grids. Merging the existing grids into the new ones should not be hard, but not a priority right now for importing. It can also be implemented with a delete lower operator. - On meshes with quads sharing 2 edges it can't reconstruct level 0, it will stop at level 1 with two triangles (like Suzane). This is something that should not happen that often in a real use case. The main function of the algorithm is ##multires_unsubdivide_to_basemesh## It expects an already subdivided mesh (original_mesh) and it will output the level 0 base mesh and an array of ##MultiresUnsubdivideGrid## indexed per base mesh loop. These structs contain the coordinates in object space in the correct order to build the grid for each loop.

This implements the main unsubdivide algorithm which rebuilds a base mesh and extracts the grid's data from a high resolution mesh. It includes the Rebuild Subdivisions operator, which generates all subdivision levels down to the level 0 base mesh. {F8464719} What works: - Rebuilding an arbitrary number of levels or as many levels as possible down to level 0 in a single step (not available in the main function, but very easy to enable).- - Meshes with n-gons and triangles - Base mesh made completely out of triangles - Meshes without poles - Meshes with multiple disconnected elements at the same subdivision level What does not work: - It is still not copying the data to the original gridsseems to fail in some cases when the base mesh has triangles or ngons. The base mesh reconstruction is correct and the grids coordinates extraction also seems correct, so it does nothing.but the mesh explodes when changing subdivision levels. - The mesh should not have higher level grids. Merging the existing grids into the new ones should not be hard, but not a priority right now for importing. It can also be implemented with a delete lower operator. - On meshes with quads sharing 2 edges it can't reconstruct level 0, it will stop at level 1 with two triangles (like Suzane). This is something that should not happen that often in a real use case. The main function of the algorithm is ##multires_unsubdivide_to_basemesh## It expects an already subdivided mesh (original_mesh) and it will output the level 0 base mesh and an array of ##MultiresUnsubdivideGrid## indexed per base mesh loop. These structs contain the coordinates in object space in the correct order to build the grid for each loop.