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use proper scaled radial deadzone calculation

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This commit is contained in:
Brad Parker 2019-03-29 14:07:35 -04:00
parent 306653d069
commit 8639018976
1 changed files with 34 additions and 2 deletions
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36
input/input_driver.c
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@ -18,12 +18,14 @@
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include <compat/strl.h>
#include <file/file_path.h>
#include <file/config_file.h>
#include <encodings/utf.h>
#include <string/stdstring.h>
#include <math/float_minmax.h>
#include <retro_assert.h>
@ -881,18 +883,48 @@ static int16_t input_joypad_axis(const input_device_driver_t *drv, unsigned port
{
int16_t val = 0;
settings_t *settings = config_get_ptr();
bool left = true;
if (!drv || !drv->axis)
return 0;
val = drv->axis(port, joyaxis);
if (AXIS_POS_GET(joyaxis) == AXIS_DIR_NONE)
{
/* current axis is negative */
if (AXIS_NEG_GET(joyaxis) < 2)
{
/* current stick is the left */
left = true;
}
else
left = false;
}
else
{
/* current axis is positive */
if (AXIS_POS_GET(joyaxis) < 2)
{
/* current stick is the left */
left = true;
}
else
left = false;
}
if (settings->floats.input_analog_deadzone)
{
/* 0/1 are the left analog X/Y axes, 2/3 are the right analog X/Y axes */
int16_t x = input_joypad_axis_raw(drv, port, left ? 0 : 2);
int16_t y = input_joypad_axis_raw(drv, port, left ? 1 : 3);
int mag = sqrt(x * x + y * y);
float normalized;
float normal_mag = (1.0f / 0x7fff) * mag;
/* if analog value is below the deadzone, ignore it */
val = ((float)abs(val) / 0x7fff) < settings->floats.input_analog_deadzone ? 0 : val;
val = normal_mag <= settings->floats.input_analog_deadzone ? 0 : val;
if (val == 0)
return 0;
@ -900,7 +932,7 @@ static int16_t input_joypad_axis(const input_device_driver_t *drv, unsigned port
normalized = (1.0f / 0x7fff) * val;
/* now scale the "good" analog range appropriately, so we don't start out way above 0 */
val = 0x7fff * ((normalized - settings->floats.input_analog_deadzone) / (1.0f - settings->floats.input_analog_deadzone));
val = 0x7fff * normalized * MIN(1.0f, ((normal_mag - settings->floats.input_analog_deadzone) / (1.0f - settings->floats.input_analog_deadzone)));
}
if (settings->floats.input_analog_sensitivity != 1.0f)