Sergey Sharybin
991eac85ff
Sculpt data shouldn't be lost when making topology changes without quads<->tris face converison. General idea: - Go through all grid points of each corner and convert per-corner coordiante to per-face cooredinate - Apply weights and convert new point to per-corner coordinate - Use bilinear interpolation to get needed displacement vector Some additional work was necessery: - Two neighbour corners could have different displacements along common boundary. multires_mdisp_smooth_bounds() makes displacement "symmetrical" - Point could change it's corner, so displacement vector should be flipped in some way. In some cases it's not only flipping, because corner could be mapped with some rotation. It's not solved for triangular faces yet, so only z-axis displacement would be interpolated for tris. More limitations: - Interpolation will give incorrect result after quad<->triangle face conversion. - When face normal was fillped displacement would change it's direction too.