diff options
Diffstat (limited to 'source/blender/editors/object')
-rw-r--r-- | source/blender/editors/object/object_intern.h | 1 | ||||
-rw-r--r-- | source/blender/editors/object/object_lattice.c | 252 | ||||
-rw-r--r-- | source/blender/editors/object/object_ops.c | 3 |
3 files changed, 255 insertions, 1 deletions
diff --git a/source/blender/editors/object/object_intern.h b/source/blender/editors/object/object_intern.h index 727286c3d80..0be9c92897e 100644 --- a/source/blender/editors/object/object_intern.h +++ b/source/blender/editors/object/object_intern.h @@ -138,6 +138,7 @@ void OBJECT_OT_hook_recenter(struct wmOperatorType *ot); /* object_lattice.c */ void LATTICE_OT_select_all(struct wmOperatorType *ot); void LATTICE_OT_make_regular(struct wmOperatorType *ot); +void LATTICE_OT_flip(struct wmOperatorType *ot); /* object_group.c */ void GROUP_OT_create(struct wmOperatorType *ot); diff --git a/source/blender/editors/object/object_lattice.c b/source/blender/editors/object/object_lattice.c index d8974ea677c..ac9c4f7adee 100644 --- a/source/blender/editors/object/object_lattice.c +++ b/source/blender/editors/object/object_lattice.c @@ -46,6 +46,7 @@ #include "DNA_scene_types.h" #include "RNA_access.h" +#include "RNA_define.h" #include "BKE_context.h" #include "BKE_depsgraph.h" @@ -167,7 +168,7 @@ void load_editLatt(Object *obedit) } } -/************************** Operators *************************/ +/************************** Select All Operator *************************/ void ED_setflagsLatt(Object *obedit, int flag) { @@ -254,6 +255,8 @@ void LATTICE_OT_select_all(wmOperatorType *ot) WM_operator_properties_select_all(ot); } +/************************** Make Regular Operator *************************/ + static int make_regular_poll(bContext *C) { Object *ob; @@ -300,6 +303,253 @@ void LATTICE_OT_make_regular(wmOperatorType *ot) ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO; } +/************************** Flip Verts Operator *************************/ + +/* flipping options */ +typedef enum eLattice_FlipAxes { + LATTICE_FLIP_U = 0, + LATTICE_FLIP_V = 1, + LATTICE_FLIP_W = 2 +} eLattice_FlipAxes; + +/* Helper macro for accessing item at index (u, v, w) + * < lt: (Lattice) + * < U: (int) u-axis coordinate of point + * < V: (int) v-axis coordinate of point + * < W: (int) w-axis coordinate of point + * < dimU: (int) number of points per row or number of columns (U-Axis) + * < dimV: (int) number of rows (V-Axis) + * > returns: (BPoint *) pointer to BPoint at this index + */ +#define LATTICE_PT(lt, U, V, W, dimU, dimV) \ + ( (lt)->def + \ + ((dimU) * (dimV)) * (W) + \ + (dimU) * (V) + \ + (U) \ + ) + +/* Flip midpoint value so that relative distances between midpoint and neighbour-pair is maintained + * ! Assumes that uvw <=> xyz (i.e. axis-aligned index-axes with coordinate-axes) + * - Helper for lattice_flip_exec() + */ +static void lattice_flip_point_value(Lattice *lt, int u, int v, int w, float mid, eLattice_FlipAxes axis) +{ + BPoint *bp; + float diff; + + /* just the point in the middle (unpaired) */ + bp = LATTICE_PT(lt, u, v, w, lt->pntsu, lt->pntsv); + + /* flip over axis */ + diff = mid - bp->vec[axis]; + bp->vec[axis] = mid + diff; +} + +/* Swap pairs of lattice points along a specified axis + * - Helper for lattice_flip_exec() + */ +static void lattice_swap_point_pairs(Lattice *lt, int u, int v, int w, float mid, eLattice_FlipAxes axis) +{ + BPoint *bpA, *bpB; + + int numU = lt->pntsu; + int numV = lt->pntsv; + int numW = lt->pntsw; + + int u0 = u, u1 = u; + int v0 = v, v1 = v; + int w0 = w, w1 = w; + + /* get pair index by just overriding the relevant pair-value + * - "-1" else buffer overflow + */ + switch (axis) { + case LATTICE_FLIP_U: + u1 = numU - u - 1; + break; + case LATTICE_FLIP_V: + v1 = numV - v - 1; + break; + case LATTICE_FLIP_W: + w1 = numW - w - 1; + break; + } + + /* get points to operate on */ + bpA = LATTICE_PT(lt, u0, v0, w0, numU, numV); + bpB = LATTICE_PT(lt, u1, v1, w1, numU, numV); + + /* Swap all coordinates, so that flipped coordinates belong to + * the indices on the correct side of the lattice. + * + * Coords: (-2 4) |0| (3 4) --> (3 4) |0| (-2 4) + * Indices: (0,L) (1,R) --> (0,L) (1,R) + */ + swap_v3_v3(bpA->vec, bpB->vec); + + /* However, we need to mirror the coordinate values on the axis we're dealing with, + * otherwise we'd have effectively only rotated the points around. If we don't do this, + * we'd just be reimplementing the naive mirroring algorithm, which causes unwanted deforms + * such as flipped normals, etc. + * + * Coords: (3 4) |0| (-2 4) --\ + * \-> (-3 4) |0| (2 4) + * Indices: (0,L) (1,R) --> (0,L) (1,R) + */ + lattice_flip_point_value(lt, u0, v0, w0, mid, axis); + lattice_flip_point_value(lt, u1, v1, w1, mid, axis); +} + +static int lattice_flip_exec(bContext *C, wmOperator *op) +{ + Object *obedit = CTX_data_edit_object(C); + Lattice *lt; + + eLattice_FlipAxes axis = RNA_enum_get(op->ptr, "axis"); + int numU, numV, numW; + int totP; + + float mid = 0.0f; + short isOdd = 0; + + /* get lattice - we need the "edit lattice" from the lattice... confusing... */ + lt = (Lattice *)obedit->data; + lt = lt->editlatt->latt; + + numU = lt->pntsu; + numV = lt->pntsv; + numW = lt->pntsw; + totP = numU * numV * numW; + + /* First Pass: determine midpoint - used for flipping center verts if there are odd number of points on axis */ + switch (axis) { + case LATTICE_FLIP_U: + isOdd = numU & 1; + break; + case LATTICE_FLIP_V: + isOdd = numV & 1; + break; + case LATTICE_FLIP_W: + isOdd = numW & 1; + break; + + default: + printf("lattice_flip(): Unknown flipping axis (%d)\n", axis); + return OPERATOR_CANCELLED; + } + + if (isOdd) { + BPoint *bp; + float avgInv = 1.0f / (float)totP; + int i; + + /* midpoint calculation - assuming that u/v/w are axis-aligned */ + for (i = 0, bp = lt->def; i < totP; i++, bp++) { + mid += bp->vec[axis] * avgInv; + } + } + + /* Second Pass: swap pairs of vertices per axis, assuming they are all sorted */ + switch (axis) { + case LATTICE_FLIP_U: + { + int u, v, w; + + /* v/w strips - front to back, top to bottom */ + for (w = 0; w < numW; w++) { + for (v = 0; v < numV; v++) { + /* swap coordinates of pairs of vertices on u */ + for (u = 0; u < (numU / 2); u++) { + lattice_swap_point_pairs(lt, u, v, w, mid, axis); + } + + /* flip u-coordinate of midpoint (i.e. unpaired point on u) */ + if (isOdd) { + u = (numU / 2); + lattice_flip_point_value(lt, u, v, w, mid, axis); + } + } + } + } + break; + case LATTICE_FLIP_V: + { + int u, v, w; + + /* u/w strips - front to back, left to right */ + for (w = 0; w < numW; w++) { + for (u = 0; u < numU; u++) { + /* swap coordinates of pairs of vertices on v */ + for (v = 0; v < (numV / 2); v++) { + lattice_swap_point_pairs(lt, u, v, w, mid, axis); + } + + /* flip v-coordinate of midpoint (i.e. unpaired point on v) */ + if (isOdd) { + v = (numV / 2); + lattice_flip_point_value(lt, u, v, w, mid, axis); + } + } + } + } + break; + case LATTICE_FLIP_W: + { + int u, v, w; + + for (v = 0; v < numV; v++) { + for (u = 0; u < numU; u++) { + /* swap coordinates of pairs of vertices on w */ + for (w = 0; w < (numW / 2); w++) { + lattice_swap_point_pairs(lt, u, v, w, mid, axis); + } + + /* flip w-coordinate of midpoint (i.e. unpaired point on w) */ + if (isOdd) { + w = (numW / 2); + lattice_flip_point_value(lt, u, v, w, mid, axis); + } + } + } + } + break; + + default: /* shouldn't happen, but just in case */ + break; + } + + /* updates */ + DAG_id_tag_update(&obedit->id, OB_RECALC_DATA); + WM_event_add_notifier(C, NC_GEOM | ND_DATA, obedit->data); + + return OPERATOR_FINISHED; +} + +void LATTICE_OT_flip(wmOperatorType *ot) +{ + static EnumPropertyItem flip_items[] = { + {LATTICE_FLIP_U, "U", 0, "U (X) Axis", ""}, + {LATTICE_FLIP_V, "V", 0, "V (Y) Axis", ""}, + {LATTICE_FLIP_W, "W", 0, "W (Z) Axis", ""}, + {0, NULL, 0, NULL, NULL}}; + + /* identifiers */ + ot->name = "Flip (Distortion Free)"; + ot->description = "Mirror all control points without inverting the lattice deform"; + ot->idname = "LATTICE_OT_flip"; + + /* api callbacks */ + ot->poll = ED_operator_editlattice; + ot->invoke = WM_menu_invoke; + ot->exec = lattice_flip_exec; + + /* flags */ + ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO; + + /* properties */ + ot->prop = RNA_def_enum(ot->srna, "axis", flip_items, LATTICE_FLIP_U, "Flip Axis", "Coordinates along this axis get flipped"); +} + /****************************** Mouse Selection *************************/ static void findnearestLattvert__doClosest(void *userData, BPoint *bp, const float screen_co[2]) diff --git a/source/blender/editors/object/object_ops.c b/source/blender/editors/object/object_ops.c index 65d0c966dc2..b6d3594c826 100644 --- a/source/blender/editors/object/object_ops.c +++ b/source/blender/editors/object/object_ops.c @@ -211,6 +211,7 @@ void ED_operatortypes_object(void) WM_operatortype_append(LATTICE_OT_select_all); WM_operatortype_append(LATTICE_OT_make_regular); + WM_operatortype_append(LATTICE_OT_flip); WM_operatortype_append(OBJECT_OT_group_add); WM_operatortype_append(OBJECT_OT_group_link); @@ -424,6 +425,8 @@ void ED_keymap_object(wmKeyConfig *keyconf) WM_keymap_add_item(keymap, "OBJECT_OT_vertex_parent_set", PKEY, KM_PRESS, KM_CTRL, 0); + WM_keymap_add_item(keymap, "LATTICE_OT_flip", FKEY, KM_PRESS, KM_CTRL, 0); + /* menus */ WM_keymap_add_menu(keymap, "VIEW3D_MT_hook", HKEY, KM_PRESS, KM_CTRL, 0); |