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input_common/sdl: add support for binding button to axis

This commit is contained in:
wwylele 2017-04-17 11:49:04 +03:00
parent 6a72bd62b5
commit 4ad82f2e5a
2 changed files with 59 additions and 4 deletions
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6
src/citra/default_ini.h
View File

@ -19,7 +19,13 @@ const char* sdl2_config_file = R"(
# - "joystick": the index of the joystick to bind
# - "button"(optional): the index of the button to bind
# - "hat"(optional): the index of the hat to bind as direction buttons
# - "axis"(optional): the index of the axis to bind
# - "direction"(only used for hat): the direction name of the hat to bind. Can be "up", "down", "left" or "right"
# - "threshould"(only used for axis): a float value in (-1.0, 1.0) which the button is
# triggered if the axis value crosses
# - "direction"(only used for axis): "+" means the button is triggered when the axis value
# is greater than the threshold; "-" means the button is triggered when the axis value
# is smaller than the threshold
button_a=
button_b=
button_x=

57
src/input_common/sdl/sdl.cpp
View File

@ -8,6 +8,7 @@
#include <tuple>
#include <unordered_map>
#include <SDL.h>
#include "common/logging/log.h"
#include "common/math_util.h"
#include "input_common/sdl/sdl.h"
@ -40,12 +41,16 @@ public:
return SDL_JoystickGetButton(joystick.get(), button) == 1;
}
std::tuple<float, float> GetAnalog(int axis_x, int axis_y) const {
float GetAxis(int axis) const {
if (!joystick)
return {};
SDL_JoystickUpdate();
float x = SDL_JoystickGetAxis(joystick.get(), axis_x) / 32767.0f;
float y = SDL_JoystickGetAxis(joystick.get(), axis_y) / 32767.0f;
return SDL_JoystickGetAxis(joystick.get(), axis) / 32767.0f;
}
std::tuple<float, float> GetAnalog(int axis_x, int axis_y) const {
float x = GetAxis(axis_x);
float y = GetAxis(axis_y);
y = -y; // 3DS uses an y-axis inverse from SDL
// Make sure the coordinates are in the unit circle,
@ -97,6 +102,27 @@ private:
Uint8 direction;
};
class SDLAxisButton final : public Input::ButtonDevice {
public:
explicit SDLAxisButton(std::shared_ptr<SDLJoystick> joystick_, int axis_, float threshold_,
bool trigger_if_greater_)
: joystick(joystick_), axis(axis_), threshold(threshold_),
trigger_if_greater(trigger_if_greater_) {}
bool GetStatus() const override {
float axis_value = joystick->GetAxis(axis);
if (trigger_if_greater)
return axis_value > threshold;
return axis_value < threshold;
}
private:
std::shared_ptr<SDLJoystick> joystick;
int axis;
float threshold;
bool trigger_if_greater;
};
class SDLAnalog final : public Input::AnalogDevice {
public:
SDLAnalog(std::shared_ptr<SDLJoystick> joystick_, int axis_x_, int axis_y_)
@ -130,8 +156,14 @@ public:
* - "joystick": the index of the joystick to bind
* - "button"(optional): the index of the button to bind
* - "hat"(optional): the index of the hat to bind as direction buttons
* - "axis"(optional): the index of the axis to bind
* - "direction"(only used for hat): the direction name of the hat to bind. Can be "up",
* "down", "left" or "right"
* "down", "left" or "right"
* - "threshould"(only used for axis): a float value in (-1.0, 1.0) which the button is
* triggered if the axis value crosses
* - "direction"(only used for axis): "+" means the button is triggered when the axis value
* is greater than the threshold; "-" means the button is triggered when the axis value
* is smaller than the threshold
*/
std::unique_ptr<Input::ButtonDevice> Create(const Common::ParamPackage& params) override {
const int joystick_index = params.Get("joystick", 0);
@ -155,6 +187,23 @@ public:
direction);
}
if (params.Has("axis")) {
const int axis = params.Get("axis", 0);
const float threshold = params.Get("threshold", 0.5f);
const std::string direction_name = params.Get("direction", "");
bool trigger_if_greater;
if (direction_name == "+") {
trigger_if_greater = true;
} else if (direction_name == "-") {
trigger_if_greater = false;
} else {
trigger_if_greater = true;
LOG_ERROR(Input, "Unknown direction %s", direction_name.c_str());
}
return std::make_unique<SDLAxisButton>(GetJoystick(joystick_index), axis, threshold,
trigger_if_greater);
}
const int button = params.Get("button", 0);
return std::make_unique<SDLButton>(GetJoystick(joystick_index), button);
}