gamepad_input.c File Reference

#include "gamepad_input.h"
#include "bool_utils.h"
#include "gamepad_context.h"
#include "log.h"
#include <GLFW/glfw3.h>
#include <math.h>

Include dependency graph for gamepad_input.c:

Macros
#define	GLFW_INCLUDE_NONE
#define	TRIGGER_NORM_FACTOR   0.5F

Functions
void	gamepad_input_init (GamepadState *state)
	Initializes gamepad state with default values.
float	gamepad_apply_deadzone (float value, float deadzone)
	Applies a dead-zone filter to an axis value.
static void	gamepad_poll_buttons (GamepadState *state, const GLFWgamepadstate *pad, GamepadActions *actions)
	Detects edge-triggered button presses and saves state.
void	gamepad_input_poll (GamepadState *state, GamepadActions *actions)
	Polls GLFW gamepad state and detects button events.
void	gamepad_write_input (const GamepadState *state, GamepadContext *ctx)
	Writes gamepad axes into a GamepadContext.

Macro Definition Documentation

GLFW_INCLUDE_NONE

#define GLFW_INCLUDE_NONE

TRIGGER_NORM_FACTOR

#define TRIGGER_NORM_FACTOR   0.5F

Factor to convert GLFW trigger range [-1,1] to normalised [0,1].

Function Documentation

gamepad_apply_deadzone()

float gamepad_apply_deadzone	(	float	value,
		float	deadzone
	)

Applies a dead-zone filter to an axis value.

Returns 0.0 if |value| < deadzone, otherwise rescales linearly so the usable range is [0, 1] (preserving sign).

Parameters

value	Raw axis value in [-1, 1].
deadzone	Dead-zone threshold in [0, 1).

Returns

Filtered axis value.

gamepad_input_init()

void gamepad_input_init

(

GamepadState *

state

)

Initializes gamepad state with default values.

Parameters

state

Pointer to the gamepad state to initialize.

gamepad_input_poll()

void gamepad_input_poll	(	GamepadState *	state,
		GamepadActions *	actions
	)

Polls GLFW gamepad state and detects button events.

Reads axes (with deadzone) into state->axes for later use by gamepad_write_input. Detects edge-triggered button presses. Call once per frame, before the physics accumulator loop.

Parameters

state	Pointer to the persistent gamepad state.
actions	Output struct for edge-detected button events (may be NULL).

Here is the call graph for this function:

gamepad_poll_buttons()

static void gamepad_poll_buttons ( GamepadState *  state, const GLFWgamepadstate *  pad, GamepadActions *  actions  )

static

Detects edge-triggered button presses and saves state.

gamepad_write_input()

void gamepad_write_input	(	const GamepadState *	state,
		GamepadContext *	ctx
	)

Writes gamepad axes into a GamepadContext.

Overlays analog stick values onto move_input and applies look (yaw/pitch). The caller bridges Camera ↔ GamepadContext.

Parameters

state	Pointer to the gamepad state (with cached axes).
ctx	Pointer to the context to write into.