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102 lines
2.4 KiB
C++
102 lines
2.4 KiB
C++
#include "touch_joystick.h"
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#include <math.h>
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TouchJoystick::TouchJoystick(int32_t pos_x, int32_t pos_y, int32_t pos_r, int16_t usb_x, int16_t usb_y, int16_t usb_r)
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{
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init(pos_x, pos_y, pos_r, usb_x, usb_y, usb_r);
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}
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void TouchJoystick::init(int32_t pos_x, int32_t pos_y, int32_t pos_r, int16_t usb_x, int16_t usb_y, int16_t usb_r)
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{
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this->pos_x = pos_x;
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this->pos_y = pos_y;
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this->pos_r = pos_r;
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this->pos_r2 = pos_r * pos_r;
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this->usb_x = usb_x;
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this->usb_y = usb_y;
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this->usb_r = usb_r;
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this->pos2usb = (float)usb_r / pos_r;
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this->dead_zone_inner = 0;
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this->dead_zone_inner2 = 0;
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this->dead_zone_outer = pos_r;
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this->dead_zone_outer2 = pos_r2;
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this->invert_x = false;
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this->invert_y = false;
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}
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void TouchJoystick::setDeadZoneInner(int32_t dead_zone_inner)
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{
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this->dead_zone_inner = dead_zone_inner;
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this->dead_zone_inner2 = dead_zone_inner * dead_zone_inner;
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}
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void TouchJoystick::setDeadZoneOuter(int32_t dead_zone_outer)
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{
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this->dead_zone_outer = pos_r - dead_zone_outer; // argument is from the outer edge, atribute is from the center
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this->dead_zone_outer2 = this->dead_zone_outer * this->dead_zone_outer;
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pos2usb = (float)usb_r / this->dead_zone_outer;
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}
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void TouchJoystick::setInvertX(bool invert_x)
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{
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this->invert_x = invert_x;
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}
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void TouchJoystick::setInvertY(bool invert_y)
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{
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this->invert_y = invert_y;
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}
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int8_t TouchJoystick::touch(int32_t tx, int32_t ty, int16_t* rx, int16_t* ry)
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{
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int8_t ret = 2;
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tx -= pos_x;
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ty -= pos_y;
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int32_t t2 = tx * tx + ty * ty;
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x = usb_x;
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y = usb_y;
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// outside the range
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if (t2 > pos_r2)
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{
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ret = 0;
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}
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else // inside inner dead_zone
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if (t2 < dead_zone_inner2)
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{
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ret = 1;
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}
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else // between dead zones
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if (t2 <= dead_zone_outer2)
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{
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x = tx * pos2usb + usb_x;
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y = ty * pos2usb + usb_y;
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}
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else // in bounds outside of outer dead zone
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{
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float len = sqrt(t2);
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x = (tx * dead_zone_outer / len) * pos2usb + usb_x;
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y = (ty * dead_zone_outer / len) * pos2usb + usb_y;
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}
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if (invert_x) x = usb_x + usb_r - x;
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if (invert_y) y = usb_y + usb_r - y;
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if (rx != NULL && ry != NULL)
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{
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*rx = x;
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*ry = y;
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}
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return ret;
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} |