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/* SPDX-License-Identifier: GPL-2.0-or-later */
#pragma once
#include "BLI_sys_types.h" /* for intptr_t support */
/** \file
* \ingroup geo
*/
#ifdef __cplusplus
extern "C" {
#endif
typedef struct ParamHandle ParamHandle; /* Handle to an array of charts. */
typedef intptr_t ParamKey; /* Key (hash) for identifying verts and faces. */
#define PARAM_KEY_MAX INTPTR_MAX
/* -------------------------------------------------------------------- */
/** \name Chart Construction:
*
* Faces and seams may only be added between #GEO_uv_parametrizer_construct_begin and
* #GEO_uv_parametrizer_construct_end.
*
* The pointers to `co` and `uv` are stored, rather than being copied. Vertices are implicitly
* created.
*
* In #GEO_uv_parametrizer_construct_end the mesh will be split up according to the seams. The
* resulting charts must be manifold, connected and open (at least one boundary loop). The output
* will be written to the `uv` pointers.
*
* \{ */
ParamHandle *GEO_uv_parametrizer_construct_begin(void);
void GEO_uv_parametrizer_aspect_ratio(ParamHandle *handle, float aspx, float aspy);
void GEO_uv_prepare_pin_index(ParamHandle *handle, const int bmvertindex, const float uv[2]);
ParamKey GEO_uv_find_pin_index(ParamHandle *handle, const int bmvertindex, const float uv[2]);
void GEO_uv_parametrizer_face_add(ParamHandle *handle,
const ParamKey key,
const int nverts,
const ParamKey *vkeys,
const float **co,
float **uv, /* Output will eventually be written to `uv`. */
const bool *pin,
const bool *select);
void GEO_uv_parametrizer_edge_set_seam(ParamHandle *handle, ParamKey *vkeys);
void GEO_uv_parametrizer_construct_end(ParamHandle *handle,
bool fill,
bool topology_from_uvs,
int *count_fail);
void GEO_uv_parametrizer_delete(ParamHandle *handle);
/** \} */
/* -------------------------------------------------------------------- */
/** \name Least Squares Conformal Maps:
*
* Charts with less than two pinned vertices are assigned two pins. LSCM is divided to three steps:
*
* 1. Begin: compute matrix and its factorization (expensive).
* 2. Solve using pinned coordinates (cheap).
* 3. End: clean up.
*
* UV coordinates are allowed to change within begin/end, for quick re-solving.
*
* \{ */
void GEO_uv_parametrizer_lscm_begin(ParamHandle *handle, bool live, bool abf);
void GEO_uv_parametrizer_lscm_solve(ParamHandle *handle, int *count_changed, int *count_failed);
void GEO_uv_parametrizer_lscm_end(ParamHandle *handle);
/** \} */
/* -------------------------------------------------------------------- */
/** \name Stretch
* \{ */
void GEO_uv_parametrizer_stretch_begin(ParamHandle *handle);
void GEO_uv_parametrizer_stretch_blend(ParamHandle *handle, float blend);
void GEO_uv_parametrizer_stretch_iter(ParamHandle *handle);
void GEO_uv_parametrizer_stretch_end(ParamHandle *handle);
/** \} */
/* -------------------------------------------------------------------- */
/** \name Packing
* \{ */
void GEO_uv_parametrizer_pack(ParamHandle *handle,
float margin,
bool do_rotate,
bool ignore_pinned);
/** \} */
/* -------------------------------------------------------------------- */
/** \name Average area for all charts
* \{ */
void GEO_uv_parametrizer_average(ParamHandle *handle, bool ignore_pinned);
/** \} */
/* -------------------------------------------------------------------- */
/** \name Simple x,y scale
* \{ */
void GEO_uv_parametrizer_scale(ParamHandle *handle, float x, float y);
/** \} */
/* -------------------------------------------------------------------- */
/** \name Flushing
* \{ */
void GEO_uv_parametrizer_flush(ParamHandle *handle);
void GEO_uv_parametrizer_flush_restore(ParamHandle *handle);
/** \} */
#ifdef __cplusplus
}
#endif
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