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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2001-2002 NaN Holding BV. All rights reserved. */
#pragma once
/** \file
* \ingroup bke
* \brief display list (or rather multi purpose list) stuff.
*/
#include "BKE_customdata.h"
#include "DNA_customdata_types.h"
#ifdef __cplusplus
extern "C" {
#endif
/** #DispList.type */
enum {
/** A closed polygon (that can be filled). */
DL_POLY = 0,
/** An open polygon. */
DL_SEGM = 1,
/** A grid surface that respects #DL_CYCL_U & #DL_CYCL_V. */
DL_SURF = 2,
/** Triangles. */
DL_INDEX3 = 4,
/** Quads, with support for triangles (when values of the 3rd and 4th indices match). */
DL_INDEX4 = 5,
// DL_VERTCOL = 6, /* UNUSED */
/** Isolated points. */
DL_VERTS = 7,
};
/** #DispList.type */
enum {
/** U/V swapped here compared with #Nurb.flagu, #Nurb.flagv and #CU_NURB_CYCLIC */
DL_CYCL_U = (1 << 0),
DL_CYCL_V = (1 << 1),
DL_FRONT_CURVE = (1 << 2),
DL_BACK_CURVE = (1 << 3),
};
/* prototypes */
struct Depsgraph;
struct ListBase;
struct Mesh;
struct Object;
struct Scene;
/* Used for curves, nurbs, meta-balls. */
typedef struct DispList {
struct DispList *next, *prev;
short type, flag;
int parts, nr;
short col, rt; /* Currently only used for smooth flag. */
float *verts, *nors;
int *index;
int charidx;
int totindex; /* indexed array drawing surfaces */
} DispList;
void BKE_displist_copy(struct ListBase *lbn, const struct ListBase *lb);
DispList *BKE_displist_find(struct ListBase *lb, int type);
void BKE_displist_normals_add(struct ListBase *lb);
void BKE_displist_count(const struct ListBase *lb, int *totvert, int *totface, int *tottri);
void BKE_displist_free(struct ListBase *lb);
void BKE_displist_make_curveTypes(struct Depsgraph *depsgraph,
const struct Scene *scene,
struct Object *ob,
bool for_render);
void BKE_displist_make_mball(struct Depsgraph *depsgraph, struct Scene *scene, struct Object *ob);
void BKE_curve_calc_modifiers_pre(struct Depsgraph *depsgraph,
const struct Scene *scene,
struct Object *ob,
struct ListBase *source_nurb,
struct ListBase *target_nurb,
bool for_render);
bool BKE_displist_surfindex_get(
const struct DispList *dl, int a, int *b, int *p1, int *p2, int *p3, int *p4);
/**
* \param normal_proj: Optional normal that's used to project the scan-fill verts into 2D coords.
* Pass this along if known since it saves time calculating the normal.
* This is also used to initialize #DispList.nors (one normal per display list).
* \param flip_normal: Flip the normal (same as passing \a normal_proj negated).
*/
void BKE_displist_fill(const struct ListBase *dispbase,
struct ListBase *to,
const float normal_proj[3],
bool flip_normal);
float BKE_displist_calc_taper(struct Depsgraph *depsgraph,
const struct Scene *scene,
struct Object *taperobj,
int cur,
int tot);
void BKE_displist_minmax(const struct ListBase *dispbase, float min[3], float max[3]);
#ifdef __cplusplus
}
#endif
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