Multires: Update and add comments
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@ -52,6 +52,11 @@
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/** \name Local Structs
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* \{ */
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/* Surface refers to a simplified and lower-memory footprint representation of the limit surface.
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*
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* Used to store pre-calculated information which is expensive or impossible to evaluate when
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* travesing the final limit surface. */
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typedef struct SurfacePoint {
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float P[3];
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float tangent_matrix[3][3];
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@ -61,6 +66,9 @@ typedef struct SurfaceGrid {
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SurfacePoint *points;
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} SurfaceGrid;
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/* Geometry elements which are used to simplify creation of topology refiner at the sculpt level.
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* Contains a limited subset of information needed to construct topology refiner. */
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typedef struct Vertex {
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/* All grid coordinates which the vertex corresponding to.
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* For a vertices which are created from inner points of grids there is always one coordinate. */
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@ -87,6 +95,8 @@ typedef struct Edge {
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float sharpness;
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} Edge;
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/* Context which holds all information eeded during propagation and smoothing. */
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typedef struct MultiresReshapeSmoothContext {
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const MultiresReshapeContext *reshape_context;
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@ -118,8 +128,14 @@ typedef struct MultiresReshapeSmoothContext {
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/* Subdivision surface created for geometry at a reshape level. */
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Subdiv *reshape_subdiv;
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/* Grids allocated at the top level storing state of the base mesh,
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* Basically, lower memory footprint version of the base mesh limit surface. */
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/* Limit surface of the base mesh with original sculpt level details on it, subdivided up to the
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* top level.
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* Is used as a base point to calculate how much displacement has been made in the sculpt mode.
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*
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* NOTE: Referring to sculpt as it is the main user of this functionality and it is clear to
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* understand what it actually means in a concrete example. This is a generic code which is also
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* used by Subdivide operation, but the idea is exactly the same as propagation in the sculpt
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* mode. */
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SurfaceGrid *base_surface_grids;
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/* Defines how displacement is interpolated on the higher levels (for example, whether
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