Class: SDL2::GameController
- Inherits:
-
Object
- Object
- SDL2::GameController
- Defined in:
- gamecontroller.c,
gamecontroller.c
Overview
This class represents a “Game Controller”.
In SDL2, there is a gamecontroller framework to hide the details of joystick types. This framework is built on the existing joystick API.
The framework consists of two parts:
- Mapping joysticks to game controllers
- Aquire input from game controllers
Mapping information is a string, and described as:
GUID,name,mapping
GUID is a unique ID of a type of joystick and given by Joystick#GUID. name is the human readable string for the device, and mappings are contorller mappings to joystick ones.
This mappings abstract the details of joysticks, for exmaple, the number of buttons, the number of axes, and the position of these buttons a on pad. You can use unified interface with this framework theoretically. Howerver, we need to prepare the database of many joysticks that users will use. A database is available at https://github.com/gabomdq/SDL_GameControllerDB, but perhaps this is not sufficient for your usage. In fact, Steam prepares its own database for Steam games, so if you will create a game for Steam, this framework is useful. Otherwise, it is a better way to use joystick API directly.
Defined Under Namespace
Class Method Summary collapse
-
.add_mapping(string) ⇒ Integer
Add suuport for controolers that SDL is unaware of or to cause an existing controller to have a different binding.
-
.axis_from_name(name) ⇒ Integer
Get a integer representation of the axis whose string representation is name.
-
.axis_name_of(axis) ⇒ String
Get a string representing axis.
-
.button_from_name(name) ⇒ Integer
Get a integer representation of the button whose string representation is name.
-
.button_name_of(button) ⇒ String
Get a string representing button.
-
.device_names ⇒ Array<String,nil>
Get the implementation dependent name for the game controllers connected to the machine.
-
.mapping_for(guid_string) ⇒ String
Get the game controller mapping string for a given GUID.
-
.open(index) ⇒ SDL2::GameController
Open a game controller and return the opened GameController object.
Instance Method Summary collapse
-
#attached? ⇒ Boolean
Return true if self is opened and attached.
-
#axis(axis) ⇒ Integer
Get the state of an axis control.
-
#button_pressed?(button) ⇒ Boolean
Return true if a button is pressed.
-
#destroy ⇒ Object
Close the game controller.
-
#destroy? ⇒ Boolean
Return true if the gamecontroller is already closed.
-
#mapping ⇒ String
Get the mapping string of self.
-
#name ⇒ String
Get the name of an opened game controller.
Class Method Details
.add_mapping(string) ⇒ Integer
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# File 'gamecontroller.c', line 96
static VALUE GameController_s_add_mapping(VALUE self, VALUE string)
{
int ret = HANDLE_ERROR(SDL_GameControllerAddMapping(StringValueCStr(string)));
return INT2NUM(ret);
}
|
.axis_from_name(name) ⇒ Integer
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# File 'gamecontroller.c', line 149
static VALUE GameController_s_axis_from_name(VALUE self, VALUE name)
{
int axis = SDL_GameControllerGetAxisFromString(StringValueCStr(name));
if (axis < 0) {
SDL_SetError("Unknown axis name \"%s\"", StringValueCStr(name));
SDL_ERROR();
}
return INT2FIX(axis);
}
|
.axis_name_of(axis) ⇒ String
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# File 'gamecontroller.c', line 110
static VALUE GameController_s_axis_name_of(VALUE self, VALUE axis)
{
const char* name = SDL_GameControllerGetStringForAxis(NUM2INT(axis));
if (!name) {
SDL_SetError("Unknown axis %d", NUM2INT(axis));
SDL_ERROR();
}
return utf8str_new_cstr(name);
}
|
.button_from_name(name) ⇒ Integer
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# File 'gamecontroller.c', line 170
static VALUE GameController_s_button_from_name(VALUE self, VALUE name)
{
int button = SDL_GameControllerGetButtonFromString(StringValueCStr(name));
if (button < 0) {
SDL_SetError("Unknown button name \"%s\"", StringValueCStr(name));
SDL_ERROR();
}
return INT2FIX(button);
}
|
.button_name_of(button) ⇒ String
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# File 'gamecontroller.c', line 128
static VALUE GameController_s_button_name_of(VALUE self, VALUE button)
{
const char* name = SDL_GameControllerGetStringForButton(NUM2INT(button));
if (!name) {
SDL_SetError("Unknown axis %d", NUM2INT(button));
SDL_ERROR();
}
return utf8str_new_cstr(name);
}
|
.device_names ⇒ Array<String,nil>
Get the implementation dependent name for the game controllers connected to the machine.
The number of elements of returning array is same as Joystick.num_connected_joysticks.
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# File 'gamecontroller.c', line 189
static VALUE GameController_s_device_names(VALUE self)
{
int num_joysticks = SDL_NumJoysticks();
int i;
VALUE device_names = rb_ary_new2(num_joysticks);
for (i=0; i<num_joysticks; ++i) {
const char* name = SDL_GameControllerNameForIndex(i);
if (name)
rb_ary_push(device_names, utf8str_new_cstr(name));
else
rb_ary_push(device_names, Qnil);
}
return device_names;
}
|
.mapping_for(guid_string) ⇒ String
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# File 'gamecontroller.c', line 212
static VALUE GameController_s_mapping_for(VALUE self, VALUE guid_string)
{
SDL_JoystickGUID guid = SDL_JoystickGetGUIDFromString(StringValueCStr(guid_string));
return utf8str_new_cstr(SDL_GameControllerMappingForGUID(guid));
}
|
.open(index) ⇒ SDL2::GameController
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# File 'gamecontroller.c', line 228
static VALUE GameController_s_open(VALUE self, VALUE index)
{
SDL_GameController* controller = SDL_GameControllerOpen(NUM2INT(index));
if (!controller)
SDL_ERROR();
return GameController_new(controller);
}
|
Instance Method Details
#attached? ⇒ Boolean
Return true if self is opened and attached.
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# File 'gamecontroller.c', line 253
static VALUE GameController_attached_p(VALUE self)
{
return INT2BOOL(SDL_GameControllerGetAttached(Get_SDL_GameController(self)));
}
|
#axis(axis) ⇒ Integer
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# File 'gamecontroller.c', line 294
static VALUE GameController_axis(VALUE self, VALUE axis)
{
return INT2FIX(SDL_GameControllerGetAxis(Get_SDL_GameController(self),
NUM2INT(axis)));
}
|
#button_pressed?(button) ⇒ Boolean
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# File 'gamecontroller.c', line 306
static VALUE GameController_button_pressed_p(VALUE self, VALUE button)
{
return INT2BOOL(SDL_GameControllerGetButton(Get_SDL_GameController(self),
NUM2INT(button)));
}
|
#destroy ⇒ Object
Close the game controller.
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# File 'gamecontroller.c', line 263
static VALUE GameController_destroy(VALUE self)
{
GameController* g = Get_GameController(self);
if (g->controller)
SDL_GameControllerClose(g->controller);
g->controller = NULL;
return Qnil;
}
|
#destroy? ⇒ Boolean
Return true if the gamecontroller is already closed.
#mapping ⇒ String
Get the mapping string of self.
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# File 'gamecontroller.c', line 279
static VALUE GameController_mapping(VALUE self)
{
return utf8str_new_cstr(SDL_GameControllerMapping(Get_SDL_GameController(self)));
}
|
#name ⇒ String
Get the name of an opened game controller.
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# File 'gamecontroller.c', line 241
static VALUE GameController_name(VALUE self)
{
const char* name = SDL_GameControllerName(Get_SDL_GameController(self));
if (!name)
SDL_ERROR();
return utf8str_new_cstr(name);
}
|