mirror of https://github.com/stella-emu/stella.git
128 lines
4.2 KiB
C++
128 lines
4.2 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 MINDLINK_HXX
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#define MINDLINK_HXX
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#include "bspf.hxx"
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#include "Control.hxx"
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/**
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The Atari Mindlink was an unreleased video game controller intended for
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release in 1984. The Mindlink was unique in that one had to move the
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muscles in one's head to control the game. These movements would be read by
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infrared sensors and transferred as movement in the game. For more
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information, see the following link:
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http://www.atarimuseum.com/videogames/consoles/2600/mindlink.html
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This code was heavily borrowed from z26, and uses conventions defined
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there. Specifically, IOPortA is treated as a complete uInt8, whereas
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the Stella core actually stores this information in boolean arrays
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addressable by DigitalPin number.
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@author Stephen Anthony & z26 team
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*/
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class MindLink : public Controller
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{
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public:
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/**
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Create a new MindLink 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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MindLink(Jack jack, const Event& event, const System& system);
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virtual ~MindLink() = default;
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public:
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/**
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Write the given value to the specified digital pin for this
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controller. Writing is only allowed to the pins associated
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with the PIA. Therefore you cannot write to pin six.
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@param pin The pin of the controller jack to write to
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@param value The value to write to the pin
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*/
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void write(DigitalPin pin, bool value) override { setPin(pin, value); }
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/**
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Called after *all* digital pins have been written on Port A.
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*/
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void controlWrite(uInt8) override { nextMindlinkBit(); }
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/**
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Update the entire digital and analog pin state according to the
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events currently set.
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*/
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void update() override;
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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 "MindLink"; }
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/**
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Answers whether the controller is intrinsically an analog controller.
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*/
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bool isAnalog() const override { return true; }
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/**
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Determines how this controller will treat values received from the
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X/Y axis and left/right buttons of the mouse. Since not all controllers
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use the mouse the same way (or at all), it's up to the specific class to
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decide how to use this data.
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In the current implementation, the left button is tied to the X axis,
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and the right one tied to the Y axis.
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@param xtype The controller to use for x-axis data
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@param xid The controller ID to use for x-axis data (-1 for no id)
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@param ytype The controller to use for y-axis data
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@param yid The controller ID to use for y-axis data (-1 for no id)
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@return Whether the controller supports using the mouse
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*/
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bool setMouseControl(
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Controller::Type xtype, int xid, Controller::Type ytype, int yid) override;
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private:
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void nextMindlinkBit();
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private:
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// Position value in Mindlink controller
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// Gets transferred bitwise (16 bits)
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int myMindlinkPos{0x2800};
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// Which bit to transfer next
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int myMindlinkShift{1};
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// Whether to use the mouse to emulate this controller
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int myMouseEnabled{false};
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private:
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// Following constructors and assignment operators not supported
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MindLink() = delete;
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MindLink(const MindLink&) = delete;
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MindLink(MindLink&&) = delete;
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MindLink& operator=(const MindLink&) = delete;
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MindLink& operator=(MindLink&&) = delete;
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};
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#endif
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