e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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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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* \note dials act similar to old rotation based phones and output an angle.
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*
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* They just are initialized with the center of the dial and a threshold value as input.
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*
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* When the distance of the current position of the dial from the center
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* exceeds the threshold, this position is used to calculate the initial direction.
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* After that, the angle from the initial direction is calculated based on
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* current and previous directions of the digit, and returned to the user.
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*
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* Usage examples:
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*
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* \code{.c}
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* float start_position[2] = {0.0f, 0.0f};
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* float current_position[2];
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* float threshold = 0.5f;
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* float angle;
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* Dial *dial;
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*
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* dial = BLI_dial_init(start_position, threshold);
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*
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* angle = BLI_dial_angle(dial, current_position);
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*
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* MEM_freeN(dial);
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* \endcode
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct Dial Dial;
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Dial *BLI_dial_init(const float start_position[2], float threshold);
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float BLI_dial_angle(Dial *dial, const float current_position[2]);
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#ifdef __cplusplus
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}
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#endif
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