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update comment. use sqrtf.

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Eric Wasylishen 2016-03-01 11:55:02 -07:00
parent 52c67ac35d
commit 6c2152f384
1 changed files with 6 additions and 5 deletions
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11
quakespasm/Quake/in_sdl.c
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@ -417,7 +417,7 @@ assumes axis values are in [-1, 1]. Raises the axis values to the given exponent
*/
static joyaxis_t IN_ApplyEasing(joyaxis_t axis, float exponent)
{
joyaxis_t result = {0};
joyaxis_t result;
float magnitude, eased_magnitude;
magnitude = sqrtf( (axis.x * axis.x) + (axis.y * axis.y) );
@ -440,13 +440,14 @@ static joyaxis_t IN_ApplyEasing(joyaxis_t axis, float exponent)
IN_ApplyMoveEasing
clamps coordinates to a square with coordinates +/- sqrt(2)/2, then scales them to +/- 1.
This is so when the stick is on a diagonal, it will have coordinates (1,1).
This wastes a bit of stick range, but gives the diagonals coordinates of (+/-1,+/-1),
so holding the stick on a diagonal gives the same speed boost as holding the forward and strafe keyboard keys.
================
*/
static joyaxis_t IN_ApplyMoveEasing(joyaxis_t axis)
{
joyaxis_t result = {0};
const float v = sqrt(2)/2;
joyaxis_t result;
const float v = sqrtf(2.0f) / 2.0f;
result.x = q_max(-v, q_min(v, axis.x));
result.y = q_max(-v, q_min(v, axis.y));
@ -468,7 +469,7 @@ and adapted from http://www.third-helix.com/2013/04/12/doing-thumbstick-dead-zon
*/
static joyaxis_t IN_ApplyDeadzone(joyaxis_t axis, float deadzone)
{
joyaxis_t result = {0};
joyaxis_t result;
float magnitude = sqrtf( (axis.x * axis.x) + (axis.y * axis.y) );
if ( magnitude < deadzone ) {