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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2011 by Bastien Montagne. All rights reserved. */
/** \file
* \ingroup modifiers
*/
#pragma once
struct CurveMapping;
struct MDeformVert;
struct MDeformWeight;
struct Mesh;
struct ModifierEvalContext;
struct Object;
struct PointerRNA;
struct RNG;
struct Scene;
struct Tex;
struct uiLayout;
/*
* XXX I'd like to make modified weights visible in WeightPaint mode,
* but couldn't figure a way to do this...
* Maybe this will need changes in mesh_calc_modifiers?
* Or the WeightPaint mode code itself?
*/
/**************************************
* Util functions. *
**************************************/
/**
* We cannot divide by zero (what a surprise...).
* So if `-MOD_WEIGHTVGROUP_DIVMODE_ZEROFLOOR < weightf < MOD_WEIGHTVGROUP_DIVMODE_ZEROFLOOR`,
* we clamp weightf to this value (or its negative version).
* Also used to avoid null power factor.
*/
#define MOD_WVG_ZEROFLOOR 1.0e-32f
/**
* Maps new_w weights in place, using either one of the predefined functions, or a custom curve.
* Return values are in new_w.
* If indices is not NULL, it must be a table of same length as org_w and new_w,
* mapping to the real vertex index (in case the weight tables do not cover the whole vertices...).
* cmap might be NULL, in which case curve mapping mode will return unmodified data.
*/
void weightvg_do_map(int num,
float *new_w,
short falloff_type,
bool do_invert,
struct CurveMapping *cmap,
struct RNG *rng);
/**
* Applies new_w weights to org_w ones, using either a texture, vgroup or constant value as factor.
* Return values are in org_w.
* If indices is not NULL, it must be a table of same length as org_w and new_w,
* mapping to the real vertex index (in case the weight tables do not cover the whole vertices...).
* XXX The standard "factor" value is assumed in [0.0, 1.0] range.
* Else, weird results might appear.
*/
void weightvg_do_mask(const ModifierEvalContext *ctx,
int num,
const int *indices,
float *org_w,
const float *new_w,
Object *ob,
struct Mesh *mesh,
float fact,
const char defgrp_name[MAX_VGROUP_NAME],
struct Scene *scene,
Tex *texture,
int tex_use_channel,
int tex_mapping,
Object *tex_map_object,
const char *text_map_bone,
const char *tex_uvlayer_name,
bool invert_vgroup_mask);
/**
* Applies weights to given vgroup (defgroup), and optionally add/remove vertices from the group.
* If dws is not NULL, it must be an array of #MDeformWeight pointers of same length as weights
* (and defgrp_idx can then have any value).
* If indices is not NULL, it must be an array of same length as weights, mapping to the real
* vertex index (in case the weight array does not cover the whole vertices...).
*/
void weightvg_update_vg(struct MDeformVert *dvert,
int defgrp_idx,
struct MDeformWeight **dws,
int num,
const int *indices,
const float *weights,
bool do_add,
float add_thresh,
bool do_rem,
float rem_thresh,
bool do_normalize);
/**
* Common vertex weight mask interface elements for the modifier panels.
*/
void weightvg_ui_common(const bContext *C, PointerRNA *ob_ptr, PointerRNA *ptr, uiLayout *layout);
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