diff options
author | Bastien Montagne <montagne29@wanadoo.fr> | 2013-09-10 19:26:12 +0400 |
---|---|---|
committer | Bastien Montagne <montagne29@wanadoo.fr> | 2013-09-10 19:26:12 +0400 |
commit | 135f6a72d42d704468dd29c470390df52b905d1b (patch) | |
tree | 99c70d8191e1f22beeb87d3df3a7291af50a138b /source/blender | |
parent | 44c7a87ada3ae260f14bbd25a26bd89341f1543f (diff) |
Split normals API, to get per-vertex per-face normals, useful to export sharp edges in a compatible way.
Many thanks to Campbell and Brecht for reviews.
Diffstat (limited to 'source/blender')
-rw-r--r-- | source/blender/makesrna/intern/rna_mesh.c | 24 | ||||
-rw-r--r-- | source/blender/makesrna/intern/rna_mesh_api.c | 55 |
2 files changed, 77 insertions, 2 deletions
diff --git a/source/blender/makesrna/intern/rna_mesh.c b/source/blender/makesrna/intern/rna_mesh.c index ead702a56a6..2820a7a3aa9 100644 --- a/source/blender/makesrna/intern/rna_mesh.c +++ b/source/blender/makesrna/intern/rna_mesh.c @@ -320,6 +320,20 @@ static void rna_MEdge_crease_set(PointerRNA *ptr, float value) medge->crease = (char)(CLAMPIS(value * 255.0f, 0, 255)); } +static void rna_MeshLoop_normal_get(PointerRNA *ptr, float *values) +{ + Mesh *me = rna_mesh(ptr); + MLoop *ml = (MLoop *)ptr->data; + const float (*vec)[3] = CustomData_get(&me->ldata, (int)(ml - me->mloop), CD_NORMAL); + + if (!vec) { + zero_v3(values); + } + else { + copy_v3_v3(values, (const float *)vec); + } +} + static void rna_MeshPolygon_normal_get(PointerRNA *ptr, float *values) { Mesh *me = rna_mesh(ptr); @@ -1838,6 +1852,16 @@ static void rna_def_mloop(BlenderRNA *brna) RNA_def_property_clear_flag(prop, PROP_EDITABLE); RNA_def_property_int_funcs(prop, "rna_MeshLoop_index_get", NULL, NULL); RNA_def_property_ui_text(prop, "Index", "Index of this loop"); + + prop = RNA_def_property(srna, "normal", PROP_FLOAT, PROP_DIRECTION); + RNA_def_property_array(prop, 3); + RNA_def_property_range(prop, -1.0f, 1.0f); + RNA_def_property_clear_flag(prop, PROP_EDITABLE); + RNA_def_property_float_funcs(prop, "rna_MeshLoop_normal_get", NULL, NULL); + RNA_def_property_ui_text(prop, "Loop Normal", + "Local space unit length split normal vector of this vertex for this polygon " + "(only computed on demand!)"); + } static void rna_def_mpolygon(BlenderRNA *brna) diff --git a/source/blender/makesrna/intern/rna_mesh_api.c b/source/blender/makesrna/intern/rna_mesh_api.c index 7fec4a1ff9c..e1a0a2b428b 100644 --- a/source/blender/makesrna/intern/rna_mesh_api.c +++ b/source/blender/makesrna/intern/rna_mesh_api.c @@ -37,6 +37,7 @@ #include "BLI_sys_types.h" #include "BLI_utildefines.h" +#include "BLI_math.h" #include "BKE_mesh.h" #include "ED_mesh.h" @@ -57,8 +58,48 @@ static const char *rna_Mesh_unit_test_compare(struct Mesh *mesh, bContext *C, st return ret; } -void rna_Mesh_calc_smooth_groups(struct Mesh *mesh, int use_bitflags, int *r_poly_group_len, - int **r_poly_group, int *r_group_total) +static void rna_Mesh_calc_split_normals(Mesh *mesh, float min_angle) +{ + float (*r_loopnors)[3]; + float (*polynors)[3]; + bool free_polynors; + + if (CustomData_has_layer(&mesh->ldata, CD_NORMAL)) { + r_loopnors = CustomData_get_layer(&mesh->ldata, CD_NORMAL); + memset(r_loopnors, 0, sizeof(float[3]) * mesh->totloop); + } + else { + r_loopnors = CustomData_add_layer(&mesh->ldata, CD_NORMAL, CD_CALLOC, NULL, mesh->totloop); + CustomData_set_layer_flag(&mesh->ldata, CD_NORMAL, CD_FLAG_TEMPORARY); + } + + if (CustomData_has_layer(&mesh->pdata, CD_NORMAL)) { + /* This assume that layer is always up to date, not sure this is the case (esp. in Edit mode?)... */ + polynors = CustomData_get_layer(&mesh->pdata, CD_NORMAL); + } + else { + polynors = MEM_mallocN(sizeof(float [3]) * mesh->totpoly, AT); + BKE_mesh_calc_normals_poly(mesh->mvert, mesh->totvert, mesh->mloop, mesh->mpoly, mesh->totloop, mesh->totpoly, + polynors, false); + free_polynors = true; + } + + BKE_mesh_normals_loop_split(mesh->mvert, mesh->totvert, mesh->medge, mesh->totedge, + mesh->mloop, r_loopnors, mesh->totloop, mesh->mpoly, polynors, mesh->totpoly, + min_angle); + + if (free_polynors) { + MEM_freeN(polynors); + } +} + +static void rna_Mesh_free_split_normals(Mesh *mesh) +{ + CustomData_free_layers(&mesh->ldata, CD_NORMAL, mesh->totloop); +} + +static void rna_Mesh_calc_smooth_groups(Mesh *mesh, int use_bitflags, int *r_poly_group_len, + int **r_poly_group, int *r_group_total) { *r_poly_group_len = mesh->totpoly; *r_poly_group = BKE_mesh_calc_smoothgroups( @@ -83,6 +124,16 @@ void RNA_api_mesh(StructRNA *srna) func = RNA_def_function(srna, "calc_normals", "BKE_mesh_calc_normals"); RNA_def_function_ui_description(func, "Calculate vertex normals"); + func = RNA_def_function(srna, "calc_split_normals", "rna_Mesh_calc_split_normals"); + RNA_def_function_ui_description(func, "Calculate split vertex normals, which preserve sharp edges"); + parm = RNA_def_float(func, "split_angle", M_PI, 0.0f, M_PI, "", + "Angle between polys' normals above which an edge is always sharp (180° to disable)", + 0.0f, M_PI); + RNA_def_property_subtype(parm, PROP_UNIT_ROTATION); + + func = RNA_def_function(srna, "free_split_normals", "rna_Mesh_free_split_normals"); + RNA_def_function_ui_description(func, "Free split vertex normals"); + func = RNA_def_function(srna, "calc_tessface", "ED_mesh_calc_tessface"); RNA_def_function_ui_description(func, "Calculate face tessellation (supports editmode too)"); |