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Joystick axes can get initialized to extreme values, at least on Linux. Hold of working with the axis values until all values have become sane at least once

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This commit is contained in:
Erik Hofman 2020-01-26 14:10:07 +01:00
parent 973bf32074
commit 3405ea2aaa
2 changed files with 19 additions and 2 deletions
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20
src/Input/FGJoystickInput.cxx
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@ -30,6 +30,8 @@
# include <windows.h>
#endif
#include <cmath>
#include <simgear/props/props_io.hxx>
#include "FGDeviceConfigurationMap.hxx"
#include <Main/fg_props.hxx>
@ -118,6 +120,7 @@ void FGJoystickInput::init()
for (int i = 0; i < MAX_JOYSTICKS; i++) {
jsJoystick * js = new jsJoystick(i);
joysticks[i].plibJS.reset(js);
initializing[i] = true;
if (js->notWorking()) {
SG_LOG(SG_INPUT, SG_DEBUG, "Joystick " << i << " not found");
@ -337,12 +340,25 @@ void FGJoystickInput::updateJoystick(int index, FGJoystickInput::joystick* joy,
float delay;
jsJoystick * js = joy->plibJS.get();
if (js == 0 || js->notWorking())
if (js == 0 || js->notWorking()) {
initializing[index] = true;
return;
}
js->read(&buttons, axis_values);
if (js->notWorking()) // If js is disconnected
if (js->notWorking()) { // If js is disconnected
initializing[index] = true;
return;
}
// Joystick axes can get initialized to extreme values, at least on Linux.
// https://sourceforge.net/p/flightgear/codetickets/2185/
if (initializing[index]) {
for (int j = 0; j < joy->naxes; j++) {
if (fabsf(axis_values[j] > 0.5f)) return;
}
initializing[index] = false;
}
// Update device status
SGPropertyNode_ptr status = status_node->getChild("joystick", index, true);

1
src/Input/FGJoystickInput.hxx
View file

@ -105,6 +105,7 @@ private:
void clearAxesAndButtons();
};
bool initializing[MAX_JOYSTICKS];
joystick joysticks[MAX_JOYSTICKS];
void updateJoystick(int index, joystick* joy, double dt);
};