Campbell Barton
3d3bc74884
MSVC used to warn about const mismatch for arguments passed by value. Remove these as newer versions of MSVC no longer show this warning.
138 lines
4.2 KiB
C++
138 lines
4.2 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*/
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#pragma once
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/** \file
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* \ingroup bli
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*/
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struct ScanFillVert;
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct ScanFillContext {
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ListBase fillvertbase;
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ListBase filledgebase;
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ListBase fillfacebase;
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/* increment this value before adding each curve to skip having to calculate
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* 'poly_nr' for edges and verts (which can take approx half scan-fill time) */
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unsigned short poly_nr;
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/* private */
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struct MemArena *arena;
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} ScanFillContext;
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#define BLI_SCANFILL_ARENA_SIZE MEM_SIZE_OPTIMAL(1 << 14)
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/**
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* \note this is USHRT_MAX so incrementing will set to zero
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* which happens if callers choose to increment #ScanFillContext.poly_nr before adding each curve.
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* Nowhere else in scan-fill do we make use of intentional overflow like this.
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*/
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#define SF_POLY_UNSET ((unsigned short)-1)
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typedef struct ScanFillVert {
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struct ScanFillVert *next, *prev;
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union {
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struct ScanFillVert *v;
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void *p;
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int i;
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unsigned int u;
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} tmp;
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/** vertex location */
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float co[3];
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/** 2D projection of vertex location */
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float xy[2];
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/** index, caller can use how it likes to match the scan-fill result with own data */
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unsigned int keyindex;
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unsigned short poly_nr;
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/** number of edges using this vertex */
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unsigned char edge_tot;
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/** vert status */
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unsigned int f : 4;
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/** flag callers can use as they like */
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unsigned int user_flag : 4;
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} ScanFillVert;
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typedef struct ScanFillEdge {
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struct ScanFillEdge *next, *prev;
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struct ScanFillVert *v1, *v2;
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unsigned short poly_nr;
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unsigned int f : 4; /* edge status */
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unsigned int user_flag : 4; /* flag callers can use as they like */
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union {
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unsigned char c;
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} tmp;
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} ScanFillEdge;
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typedef struct ScanFillFace {
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struct ScanFillFace *next, *prev;
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struct ScanFillVert *v1, *v2, *v3;
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} ScanFillFace;
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/* scanfill.c */
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struct ScanFillVert *BLI_scanfill_vert_add(ScanFillContext *sf_ctx, const float vec[3]);
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struct ScanFillEdge *BLI_scanfill_edge_add(ScanFillContext *sf_ctx,
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struct ScanFillVert *v1,
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struct ScanFillVert *v2);
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enum {
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/* NOTE(campbell): using BLI_SCANFILL_CALC_REMOVE_DOUBLES
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* Assumes ordered edges, otherwise we risk an eternal loop
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* removing double verts. */
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BLI_SCANFILL_CALC_REMOVE_DOUBLES = (1 << 1),
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/* calculate isolated polygons */
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BLI_SCANFILL_CALC_POLYS = (1 << 2),
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/* NOTE: This flag removes checks for overlapping polygons.
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* when this flag is set, we'll never get back more faces than (totvert - 2) */
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BLI_SCANFILL_CALC_HOLES = (1 << 3),
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/* checks valid edge users - can skip for simple loops */
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BLI_SCANFILL_CALC_LOOSE = (1 << 4),
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};
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void BLI_scanfill_begin(ScanFillContext *sf_ctx);
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unsigned int BLI_scanfill_calc(ScanFillContext *sf_ctx, int flag);
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unsigned int BLI_scanfill_calc_ex(ScanFillContext *sf_ctx, int flag, const float nor_proj[3]);
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void BLI_scanfill_end(ScanFillContext *sf_ctx);
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void BLI_scanfill_begin_arena(ScanFillContext *sf_ctx, struct MemArena *arena);
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void BLI_scanfill_end_arena(ScanFillContext *sf_ctx, struct MemArena *arena);
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/* scanfill_utils.c */
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/**
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* Call before scan-fill to remove self intersections.
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*
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* \return false if no changes were made.
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*/
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bool BLI_scanfill_calc_self_isect(ScanFillContext *sf_ctx,
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ListBase *fillvertbase,
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ListBase *filledgebase);
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#ifdef __cplusplus
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}
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#endif
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