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Improve asteroids keyboard input handling.

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This commit is contained in:
Jonas 'Sortie' Termansen 2014-02-14 00:11:48 +01:00
parent 3c160977bf
commit 33b9417a25
1 changed files with 48 additions and 17 deletions
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65
games/asteroids.cpp
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@ -1,6 +1,6 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013, 2014.
This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
@ -23,18 +23,19 @@
#include <sys/keycodes.h>
#include <sys/termmode.h>
#include <stdint.h>
#include <unistd.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <assert.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <math.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <timespec.h>
#include <unistd.h>
#include <dispd.h>
@ -84,12 +85,36 @@ void GenerateStarfield(uint32_t* bitmap, size_t width, size_t height)
const size_t MAXKEYNUM = 512UL;
bool keysdown[MAXKEYNUM] = { false };
bool keyspending[MAXKEYNUM] = { false };
struct timespec key_handled_last[MAXKEYNUM];
bool pop_is_key_just_down(int abskbkey)
{
assert(0 <= abskbkey);
if ( MAXKEYNUM <= (size_t) abskbkey )
return false;
if ( keyspending[abskbkey] )
{
keyspending[abskbkey] = false;
clock_gettime(CLOCK_MONOTONIC, &key_handled_last[abskbkey]);
return true;
}
if ( !keysdown[abskbkey] )
return false;
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
struct timespec elapsed = timespec_sub(now, key_handled_last[abskbkey]);
struct timespec repress_delay = timespec_make(0, 100 * 1000 * 1000);
if ( timespec_lt(elapsed, repress_delay) )
return false;
clock_gettime(CLOCK_MONOTONIC, &key_handled_last[abskbkey]);
return true;
}
void FetchKeyboardInput()
{
// Read the keyboard input from the user.
const unsigned termmode = TERMMODE_KBKEY
| TERMMODE_UNICODE
| TERMMODE_SIGNAL
| TERMMODE_NONBLOCK;
if ( settermmode(0, termmode) ) { error(1, errno, "settermmode"); }
@ -98,9 +123,15 @@ void FetchKeyboardInput()
while ( 0 < (numbytes = read(0, &codepoint, sizeof(codepoint))) )
{
int kbkey = KBKEY_DECODE(codepoint);
if( !kbkey )
continue;
int abskbkey = (kbkey < 0) ? -kbkey : kbkey;
if ( MAXKEYNUM <= (size_t) abskbkey ) { continue; }
keysdown[abskbkey] = 0 < kbkey;
if ( MAXKEYNUM <= (size_t) abskbkey )
continue;
bool is_key_down_event = 0 < kbkey;
if ( !keysdown[abskbkey] && is_key_down_event )
keyspending[abskbkey] = true;
keysdown[abskbkey] = is_key_down_event;
}
}
@ -999,14 +1030,14 @@ void GameLogic()
Object* first = firstobject;
Object* obj;
for ( obj = first; obj; obj = obj->NextObj() ) { obj->GCBirth(); }
bool key_a = pop_is_key_just_down(KBKEY_A);
bool key_b = pop_is_key_just_down(KBKEY_B);
bool key_space = pop_is_key_just_down(KBKEY_SPACE);
bool key_lctrl = pop_is_key_just_down(KBKEY_LCTRL);
playership->SetThrust(keysdown[KBKEY_UP], keysdown[KBKEY_DOWN]);
playership->SetTurn(keysdown[KBKEY_LEFT], keysdown[KBKEY_RIGHT]);
playership->SetFiring(keysdown[KBKEY_SPACE], keysdown[KBKEY_LCTRL], keysdown[KBKEY_A]);
bool makebot = keysdown[KBKEY_B];
keysdown[KBKEY_A] = false;
keysdown[KBKEY_B] = false;
keysdown[KBKEY_SPACE] = false;
keysdown[KBKEY_LCTRL] = false;
playership->SetFiring(key_space, key_lctrl, key_a);
bool makebot = key_b;
if ( makebot )
new Botship(RandomAngle(), playership->pos, playership->vel);
for ( obj = first; obj; obj = obj->NextObj() )