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refactor comments

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This commit is contained in:
Quinn
2025-07-02 10:08:14 +02:00
parent 00db0cda7e
commit 97f7f05a5c
1 changed files with 9 additions and 7 deletions
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16
src/io/input.c
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@@ -8,7 +8,8 @@
#include "../util/types.h"
#include "window.h"
/* processes an incoming scancode, returns the associated movement data, or performs the close action directly */
/* processes an incoming scancode, returns the associated movement data, or performs the close action directly
* NOTE: if the action is mapped to multiple keys, pressing both and then releasing one, disables the action. Minor issue, won't fix. */
__attribute__((const)) static int procscancode(SDL_Scancode code) {
switch (code) {
case SDL_SCANCODE_Q:
@@ -43,17 +44,18 @@ __attribute__((const)) static int procscancode(SDL_Scancode code) {
static int timeout_mask(time_t time) {
static time_t timeout = 0, timeout_roll = 0;
int msk = 0;
// only add to the mask if time_poll returns `1`, negating becomes `-1`; 0b1111...
// this is masked with the desired movement action.
msk |= ((MOVR | MOVL | MOVD) & -!!time_poll(time, 64, &timeout));
msk |= ((MOVRL | MOVRR) & -!!time_poll(time, 100, &timeout_roll));
return msk;
}
// NOTE: if an action is mapped to multiple keys, pressing both and releasing one will cause the action to be disabled. Minor issue, Won't fix.
int input_getdat(time_t time) {
static u8 movdat = 0, nmovdat = 0, lmovdat = 0;
int mov = movdat, nmov = nmovdat, lmov = lmovdat;
static u8 movdat = 0, nmovdat = 0, lmovdat = 0; // stores the static movement data
int mov = movdat, nmov = nmovdat, lmov = lmovdat; // stores the runtime movement data for easy register access
// process the event
// process the events
SDL_Event e;
while (SDL_PollEvent(&e)) {
switch (e.type) {
@@ -68,8 +70,8 @@ int input_getdat(time_t time) {
// handle releasing of keys
mov &= ~(nmov & lmov & mask); // only remove the keys that have been pressed since lmov
lmov = mov;
nmov &= mov;
lmov = mov; // set the value of lmov to the new value mov
nmov &= mov; // set nmov to only those in mov
int cmov = mov & mask;
// write to static variables (shrinking the values, and memory usage)