86 lines
1.8 KiB
C++
86 lines
1.8 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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#include <cmath>
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#include "BLI_assert.h"
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#include "BLI_math_base.h"
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#include "BLI_struct_equality_utils.hh"
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namespace blender {
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/**
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* Contains an integer frame number and a subframe float in the range [0, 1).
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*/
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struct SubFrame {
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private:
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int frame_;
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float subframe_;
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public:
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SubFrame(const int frame = 0, float subframe = 0.0f) : frame_(frame), subframe_(subframe)
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{
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BLI_assert(subframe >= 0.0f);
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BLI_assert(subframe < 1.0f);
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}
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SubFrame(const float frame) : SubFrame(int(floorf(frame)), fractf(frame)) {}
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int frame() const
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{
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return frame_;
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}
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float subframe() const
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{
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return subframe_;
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}
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explicit operator float() const
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{
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return float(frame_) + float(subframe_);
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}
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explicit operator double() const
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{
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return double(frame_) + double(subframe_);
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}
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static SubFrame min()
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{
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return {INT32_MIN, 0.0f};
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}
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static SubFrame max()
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{
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return {INT32_MAX, std::nexttowardf(1.0f, 0.0)};
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}
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BLI_STRUCT_EQUALITY_OPERATORS_2(SubFrame, frame_, subframe_)
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friend bool operator<(const SubFrame &a, const SubFrame &b)
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{
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return a.frame_ < b.frame_ || (a.frame_ == b.frame_ && a.subframe_ < b.subframe_);
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}
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friend bool operator<=(const SubFrame &a, const SubFrame &b)
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{
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return a.frame_ <= b.frame_ || (a.frame_ == b.frame_ && a.subframe_ <= b.subframe_);
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}
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friend bool operator>(const SubFrame &a, const SubFrame &b)
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{
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return a.frame_ > b.frame_ || (a.frame_ == b.frame_ && a.subframe_ > b.subframe_);
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}
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friend bool operator>=(const SubFrame &a, const SubFrame &b)
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{
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return a.frame_ >= b.frame_ || (a.frame_ == b.frame_ && a.subframe_ >= b.subframe_);
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}
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};
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} // namespace blender
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