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[input] Add logical axes
Like logical buttons, logical axes are engine-defined destinations to which input ("physical") axes can be bound.
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3 changed files with 131 additions and 1 deletions
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@ -80,7 +80,41 @@ typedef struct in_device_s {
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const char *id;
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} in_device_t;
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/*** Current state of the button.
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/*** Recipe for converting an axis to a floating point value.
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Recipes apply only to absolute axes.
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\a deadzone applies only to balanced axes, thus it doubles as a flag
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for balanced (>= 0) or unbalanced (< 0).
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\a curve is applied after the input has been converted
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*/
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typedef struct in_recipe_s {
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int minzone; ///< Size of deadzone near axis minimum
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int maxzone; ///< Size of deadzone near axis maximum
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int deadzone; ///< Size of deadzone near axis center (balanced)
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float curve; ///< Power factor for absolute axes
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} in_recipe_t;
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typedef enum {
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ina_set, ///< write the axis value to the destination
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ina_accumulate, ///< add the axis value to the destination
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} in_axis_mode;
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/*** Logical axis.
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Logical axes are the inputs defined by the game on which axis inputs
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(usually "physical" axes) can act. Depending on the mode, the physical
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axis value is either written as-is, or added to the existing value. It is
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the responsibility of the code using the axis to clear the value for
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accumulated inputs.
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*/
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typedef struct in_axis_s {
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float value; ///< converted value of the axis
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in_axis_mode mode; ///< method used for updating the destination
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} in_axis_t;
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/*** Current state of the logical button.
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Captures the current state and any transitions during the last frame.
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Not all combinations are valid (inb_edge_up|inb_down and inb_edge_down
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@ -94,6 +128,14 @@ typedef enum {
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inb_edge_up = 1<<2, ///< button released this frame
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} in_button_state;
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/*** Logical button.
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Logical buttons are the inputs defined by the game on which button inputs
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(usually "physical" buttons) can act. Up to two button inputs can be
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bound to a logical button. The logical button acts as an or gate where
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either input will put the logical button in the pressed state, and both
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inputs must be inactive for the logical button to be released.
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*/
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typedef struct in_button_s {
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int down[2]; ///< button ids holding this button down
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int state; ///< in_button_state
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@ -222,6 +264,8 @@ void IN_ClearStates (void);
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int IN_RegisterButton (in_button_t *button, const char *name,
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const char *description);
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int IN_RegisterAxis (in_axis_t *axis, const char *name,
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const char *description);
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void IN_Move (void); // FIXME: was cmduser_t?
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// add additional movement on top of the keyboard move cmd
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@ -20,6 +20,7 @@ libs_input_libQFinput_la_DEPENDENCIES= $(input_deps)
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libs_input_libQFinput_la_SOURCES= \
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libs/input/keys.c \
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libs/input/old_keys.c \
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libs/input/in_axis.c \
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libs/input/in_button.c \
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libs/input/in_common.c \
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libs/input/in_event.c
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85
libs/input/in_axis.c
Normal file
85
libs/input/in_axis.c
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@ -0,0 +1,85 @@
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/*
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in_axis.c
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Logical axis support
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Copyright (C) 2021 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2021/10/1
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include "QF/cmd.h"
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#include "QF/hash.h"
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#include "QF/input.h"
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#include "QF/sys.h"
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typedef struct regaxis_s {
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const char *name;
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const char *description;
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in_axis_t *axis;
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} regaxis_t;
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static hashtab_t *axis_tab;
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static const char *
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axis_get_key (const void *b, void *data)
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{
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__auto_type regaxis = (const regaxis_t *) b;
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return regaxis->name;
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}
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static void
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axis_free (void *b, void *data)
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{
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free (b);
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}
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VISIBLE int
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IN_RegisterAxis (in_axis_t *axis, const char *name, const char *description)
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{
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if (Hash_Find (axis_tab, name)) {
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return 0;
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}
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regaxis_t *regaxis = malloc (sizeof (regaxis_t));
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regaxis->name = name;
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regaxis->description = description;
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regaxis->axis = axis;
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return 1;
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}
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static void __attribute__((constructor))
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in_axis_init (void)
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{
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axis_tab = Hash_NewTable (127, axis_get_key, axis_free, 0, 0);
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}
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