mirror of https://github.com/stella-emu/stella.git
61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
//============================================================================
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//
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// SSSS tt lll lll
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// SS SS tt ll ll
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// SS tttttt eeee ll ll aaaa
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// SSSS tt ee ee ll ll aa
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// SS tt eeeeee ll ll aaaaa -- "An Atari 2600 VCS Emulator"
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// SS SS tt ee ll ll aa aa
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// SSSS ttt eeeee llll llll aaaaa
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//
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// Copyright (c) 1995-2020 by Bradford W. Mott, Stephen Anthony
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// and the Stella Team
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//
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// See the file "License.txt" for information on usage and redistribution of
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// this file, and for a DISCLAIMER OF ALL WARRANTIES.
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//============================================================================
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#ifndef TRAKBALL_HXX
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#define TRAKBALL_HXX
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#include "PointingDevice.hxx"
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class TrakBall : public PointingDevice
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{
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public:
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/**
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Create a new trakball controller plugged into the specified jack
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@param jack The jack the controller is plugged into
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@param event The event object to use for events
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@param system The system using this controller
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*/
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TrakBall(Jack jack, const Event& event, const System& system)
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: PointingDevice(jack, event, system, Controller::Type::TrakBall,
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trackballSensitivity) { }
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~TrakBall() override = default;
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/**
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Returns the name of this controller.
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*/
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string name() const override { return "TrakBall"; }
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protected:
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uInt8 ioPortA(uInt8 countH, uInt8 countV, uInt8 left, uInt8 down) override
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{
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static constexpr BSPF::array2D<uInt32, 2, 2> ourTableH = {{
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{ 0b00, 0b01 }, { 0b10, 0b11 }
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}};
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static constexpr BSPF::array2D<uInt32, 2, 2> ourTableV = {{
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{ 0b0100, 0b0000 }, { 0b1100, 0b1000 }
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}};
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return ourTableH[countH & 0b1][left] | ourTableV[countV & 0b1][down];
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}
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// 50% of Atari and Amiga mouse
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static constexpr float trackballSensitivity = 0.4F;
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};
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#endif // TRAKBALL_HXX
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