155 lines
5.5 KiB
C++
155 lines
5.5 KiB
C++
//////////////////////////////////////////////////////////////////////////////////////////
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// Project description
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// ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
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// Name: Input Configuration and Calibration
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// Description: Common SDL Input Functions
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//
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// Author: Falcon4ever (nJoy@falcon4ever.com, www.multigesture.net), JPeterson etc
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// Copyright (C) 2003-2008 Dolphin Project.
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//
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//////////////////////////////////////////////////////////////////////////////////////////
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//
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// Licensetype: GNU General Public License (GPL)
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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//
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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//
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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//
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//////////////////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////////////////
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// Include
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// ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
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#include "SDL.h" // Local
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////////////////////////////////////
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namespace InputCommon
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{
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//////////////////////////////////////////////////////////////////////////////////////////
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// Convert stick values
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// ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
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/* Convert stick values.
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The value returned by SDL_JoystickGetAxis is a signed integer s16
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(-32768 to 32767). The value used for the gamecube controller is an unsigned
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char u8 (0 to 255) with neutral at 0x80 (128), so that it's equivalent to a signed
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-128 to 127.
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*/
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// ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
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int Pad_Convert(int _val)
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{
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/* If the limits on PadState[].axis[] actually is a u16 then we don't need this
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but if it's not actually limited to that we need to apply these limits */
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if(_val > 32767) _val = 32767; // upper limit
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if(_val < -32768) _val = -32768; // lower limit
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// Convert the range (-0x8000 to 0x7fff) to (0 to 0xffff)
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_val = 0x8000 +_val;
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// Convert the range (-32768 to 32767) to (-128 to 127)
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_val = _val >> 8;
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//Console::Print("0x%04x %06i\n\n", _val, _val);
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return _val;
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}
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/* Convert the stick raidus from a circular to a square. I don't know what input values
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the actual GC controller produce for the GC, it may be a square, a circle or something
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in between. But one thing that is certain is that PC pads differ in their output (as
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shown in the list below), so it may be beneficiary to convert whatever radius they
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produce to the radius the GC games expect. This is the first implementation of this
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that convert a square radius to a circual radius. Use the advanced settings to enable
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and calibrate it.
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Observed diagonals:
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Perfect circle: 71% = sin(45)
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Logitech Dual Action: 100%
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Dual Shock 2 (Original) with Super Dual Box Pro: 90%
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XBox 360 Wireless: 85%
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GameCube Controller (Third Party) with EMS TrioLinker Plus II: 60%
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*/
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// ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
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float SquareDistance(float deg)
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{
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// See if we have to adjust the angle
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deg = abs(deg);
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if( (deg > 45 && deg < 135) ) deg = deg - 90;
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float rad = deg * M_PI / 180;
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float val = abs(cos(rad));
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float dist = 1 / val; // Calculate distance from center
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//m_frame->m_pStatusBar2->SetLabel(wxString::Format("Deg:%f Val:%f Dist:%f", deg, val, dist));
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return dist;
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}
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std::vector<int> Pad_Square_to_Circle(int _x, int _y, int _pad, CONTROLLER_MAPPING _PadMapping)
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{
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/* Do we need this? */
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if(_x > 32767) _x = 32767; if(_y > 32767) _y = 32767; // upper limit
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if(_x < -32768) _x = -32768; if(_y > 32767) _y = 32767; // lower limit
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// ====================================
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// Convert to circle
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// -----------
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int Tmp = atoi (_PadMapping.SDiagonal.substr(0, _PadMapping.SDiagonal.length() - 1).c_str());
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float Diagonal = Tmp / 100.0;
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// First make a perfect square in case we don't have one already
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float OrigDist = sqrt( pow((float)_y, 2) + pow((float)_x, 2) ); // Get current distance
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float rad = atan2((float)_y, (float)_x); // Get current angle
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float deg = rad * 180 / M_PI;
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// A diagonal of 85% means a distance of 1.20
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float corner_circle_dist = ( Diagonal / sin(45 * M_PI / 180) );
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float SquareDist = SquareDistance(deg);
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float adj_ratio1; // The original-to-square distance adjustment
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float adj_ratio2 = SquareDist; // The circle-to-square distance adjustment
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// float final_ratio; // The final adjustment to the current distance //TODO: This is not used
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float result_dist; // The resulting distance
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// Calculate the corner-to-square adjustment ratio
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if(corner_circle_dist < SquareDist) adj_ratio1 = SquareDist / corner_circle_dist;
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else adj_ratio1 = 1;
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// Calculate the resulting distance
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result_dist = OrigDist * adj_ratio1 / adj_ratio2;
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float x = result_dist * cos(rad); // calculate x
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float y = result_dist * sin(rad); // calculate y
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int int_x = (int)floor(x);
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int int_y = (int)floor(y);
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// Debugging
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//m_frame->m_pStatusBar2->SetLabel(wxString::Format("%f %f %i", corner_circle_dist, Diagonal, Tmp));
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std::vector<int> vec;
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vec.push_back(int_x);
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vec.push_back(int_y);
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return vec;
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}
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/////////////////////////////////////////////////////////////////////
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} |