48 lines
1.2 KiB
C++
48 lines
1.2 KiB
C++
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// Copyright 2018 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "InputCommon/ControllerEmu/StickGate.h"
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#include <cmath>
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#include "Common/MathUtil.h"
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namespace ControllerEmu
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{
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OctagonStickGate::OctagonStickGate(ControlState radius) : m_radius(radius)
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{
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}
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ControlState OctagonStickGate::GetRadiusAtAngle(double ang) const
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{
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constexpr int sides = 8;
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constexpr double sum_int_angles = (sides - 2) * MathUtil::PI;
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constexpr double half_int_angle = sum_int_angles / sides / 2;
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ang = std::fmod(ang, MathUtil::TAU / sides);
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// Solve ASA triangle using The Law of Sines:
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return m_radius / std::sin(MathUtil::PI - ang - half_int_angle) * std::sin(half_int_angle);
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}
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RoundStickGate::RoundStickGate(ControlState radius) : m_radius(radius)
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{
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}
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ControlState RoundStickGate::GetRadiusAtAngle(double) const
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{
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return m_radius;
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}
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SquareStickGate::SquareStickGate(ControlState half_width) : m_half_width(half_width)
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{
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}
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ControlState SquareStickGate::GetRadiusAtAngle(double ang) const
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{
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constexpr double section_ang = MathUtil::TAU / 4;
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return m_half_width / std::cos(std::fmod(ang + section_ang / 2, section_ang) - section_ang / 2);
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}
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} // namespace ControllerEmu
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