From c78ebf9f26d01fcc3cf16baa9da922ee183f4b09 Mon Sep 17 00:00:00 2001 From: Campbell Barton Date: Mon, 19 Mar 2018 14:49:59 +0100 Subject: Cleanup: split lattice into own library Was mixed with object functionality. --- source/blender/editors/lattice/editlattice_tools.c | 340 +++++++++++++++++++++ 1 file changed, 340 insertions(+) create mode 100644 source/blender/editors/lattice/editlattice_tools.c (limited to 'source/blender/editors/lattice/editlattice_tools.c') diff --git a/source/blender/editors/lattice/editlattice_tools.c b/source/blender/editors/lattice/editlattice_tools.c new file mode 100644 index 00000000000..c39ba44c1dc --- /dev/null +++ b/source/blender/editors/lattice/editlattice_tools.c @@ -0,0 +1,340 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV. + * All rights reserved. + * + * Contributor(s): Blender Foundation + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file blender/editors/lattice/editlattice_tools.c + * \ingroup edlattice + */ + +#include "BLI_math.h" +#include "BLI_utildefines.h" + +#include "DNA_curve_types.h" +#include "DNA_lattice_types.h" +#include "DNA_object_types.h" +#include "DNA_scene_types.h" + +#include "RNA_access.h" +#include "RNA_define.h" + +#include "BKE_context.h" +#include "BKE_depsgraph.h" +#include "BKE_lattice.h" + +#include "ED_screen.h" + +#include "WM_api.h" +#include "WM_types.h" + +#include "lattice_intern.h" + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Make Regular Operator + * \{ */ + +static int make_regular_poll(bContext *C) +{ + Object *ob; + + if (ED_operator_editlattice(C)) return 1; + + ob = CTX_data_active_object(C); + return (ob && ob->type == OB_LATTICE); +} + +static int make_regular_exec(bContext *C, wmOperator *UNUSED(op)) +{ + Object *ob = CTX_data_edit_object(C); + Lattice *lt; + + if (ob) { + lt = ob->data; + BKE_lattice_resize(lt->editlatt->latt, lt->pntsu, lt->pntsv, lt->pntsw, NULL); + } + else { + ob = CTX_data_active_object(C); + lt = ob->data; + BKE_lattice_resize(lt, lt->pntsu, lt->pntsv, lt->pntsw, NULL); + } + + DAG_id_tag_update(&ob->id, OB_RECALC_DATA); + WM_event_add_notifier(C, NC_GEOM | ND_DATA, ob->data); + + return OPERATOR_FINISHED; +} + +void LATTICE_OT_make_regular(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Make Regular"; + ot->description = "Set UVW control points a uniform distance apart"; + ot->idname = "LATTICE_OT_make_regular"; + + /* api callbacks */ + ot->exec = make_regular_exec; + ot->poll = make_regular_poll; + + /* flags */ + ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO; +} + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Flip Verts Operator + * \{ */ + +/* flipping options */ +typedef enum eLattice_FlipAxes { + LATTICE_FLIP_U = 0, + LATTICE_FLIP_V = 1, + LATTICE_FLIP_W = 2 +} eLattice_FlipAxes; + +/** + * Flip midpoint value so that relative distances between midpoint and neighbor-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 = <->def[BKE_lattice_index_from_uvw(lt, u, v, w)]; + + /* 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 = <->def[BKE_lattice_index_from_uvw(lt, u0, v0, w0)]; + bpB = <->def[BKE_lattice_index_from_uvw(lt, u1, v1, w1)]; + + /* 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 (%u)\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 const 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"); +} + +/** \} */ -- cgit v1.2.3