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/*
* ***** 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) 2015 Blender Foundation.
* All rights reserved.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file manipulator_library_utils.c
* \ingroup wm
*
* \name Manipulator Library Utilities
*
* \brief This file contains functions for common behaviors of manipulators.
*/
#include "BKE_context.h"
#include "BLI_math.h"
#include "BLI_listbase.h"
#include "RNA_access.h"
#include "WM_api.h"
#include "WM_types.h"
/* own includes */
#include "manipulator_library_intern.h"
/* factor for precision tweaking */
#define MANIPULATOR_PRECISION_FAC 0.05f
BLI_INLINE float manipulator_offset_from_value_constr(
const float range_fac, const float min, const float range, const float value,
const bool inverted)
{
return inverted ? (range_fac * (min + range - value) / range) : (range_fac * (value / range));
}
BLI_INLINE float manipulator_value_from_offset_constr(
const float range_fac, const float min, const float range, const float value,
const bool inverted)
{
return inverted ? (min + range - (value * range / range_fac)) : (value * range / range_fac);
}
float manipulator_offset_from_value(
ManipulatorCommonData *data, const float value, const bool constrained, const bool inverted)
{
if (constrained)
return manipulator_offset_from_value_constr(data->range_fac, data->min, data->range, value, inverted);
return value;
}
float manipulator_value_from_offset(
ManipulatorCommonData *data, ManipulatorInteraction *inter, const float offset,
const bool constrained, const bool inverted, const bool use_precision)
{
const float max = data->min + data->range;
if (use_precision) {
/* add delta offset of this step to total precision_offset */
inter->precision_offset += offset - inter->prev_offset;
}
inter->prev_offset = offset;
float ofs_new = inter->init_offset + offset - inter->precision_offset * (1.0f - MANIPULATOR_PRECISION_FAC);
float value;
if (constrained) {
value = manipulator_value_from_offset_constr(data->range_fac, data->min, data->range, ofs_new, inverted);
}
else {
value = ofs_new;
}
/* clamp to custom range */
if (data->flag & MANIPULATOR_CUSTOM_RANGE_SET) {
CLAMP(value, data->min, max);
}
return value;
}
void manipulator_property_data_update(
wmManipulator *mpr, ManipulatorCommonData *data, wmManipulatorProperty *mpr_prop,
const bool constrained, const bool inverted)
{
if (mpr_prop->custom_func.value_get_fn != NULL) {
/* pass */
}
else if (mpr_prop->prop != NULL) {
/* pass */
}
else {
data->offset = 0.0f;
return;
}
float value = WM_manipulator_property_value_get(mpr, mpr_prop);
if (constrained) {
if ((data->flag & MANIPULATOR_CUSTOM_RANGE_SET) == 0) {
float range[2];
WM_manipulator_property_range_get(mpr, mpr_prop, range);
data->range = range[1] - range[0];
data->min = range[0];
}
data->offset = manipulator_offset_from_value_constr(data->range_fac, data->min, data->range, value, inverted);
}
else {
data->offset = value;
}
}
void manipulator_property_value_reset(
bContext *C, const wmManipulator *mpr, ManipulatorInteraction *inter,
wmManipulatorProperty *mpr_prop)
{
WM_manipulator_property_value_set(C, mpr, mpr_prop, inter->init_value);
}
/* -------------------------------------------------------------------- */
void manipulator_color_get(
const wmManipulator *mpr, const bool highlight,
float r_col[4])
{
if (highlight && !(mpr->flag & WM_MANIPULATOR_DRAW_HOVER)) {
copy_v4_v4(r_col, mpr->color_hi);
}
else {
copy_v4_v4(r_col, mpr->color);
}
}
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