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- Improve mouse movement interpolation by recording input events at the beginning of a frame

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This commit is contained in:
Magnus Norddahl 2018-03-25 01:40:09 +01:00
parent 8f1bc32d12
commit 1d35a2320b
2 changed files with 53 additions and 36 deletions
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6
src/d_event.h
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@ -119,17 +119,13 @@ typedef enum
// Called by IO functions when input is detected.
void D_PostEvent (const event_t* ev);
void D_RemoveNextCharEvent();
void D_AddPostedEvents();
//
// GLOBAL VARIABLES
//
#define MAXEVENTS 128
extern event_t events[MAXEVENTS];
extern int eventhead;
extern int eventtail;
extern gameaction_t gameaction;

43
src/d_main.cpp
View file

@ -144,7 +144,6 @@ const FIWADInfo *D_FindIWAD(TArray<FString> &wadfiles, const char *iwad, const c
// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
void D_ProcessEvents ();
ticcmd_t G_BuildTiccmd ();
void D_DoAdvanceDemo ();
void D_AddWildFile (TArray<FString> &wadfiles, const char *pattern);
void D_LoadWadSettings ();
@ -237,9 +236,10 @@ FString StoredWarp;
bool advancedemo;
FILE *debugfile;
FILE *hashfile;
event_t events[MAXEVENTS];
int eventhead;
int eventtail;
static TArray<event_t> FrameStartInputEvents;
static event_t events[MAXEVENTS];
static int eventhead;
static int eventtail;
gamestate_t wipegamestate = GS_DEMOSCREEN; // can be -1 to force a wipe
bool PageBlank;
FTexture *Page;
@ -319,10 +319,20 @@ void D_ProcessEvents (void)
void D_PostEvent (const event_t *ev)
{
FrameStartInputEvents.Push(*ev);
}
void D_AddPostedEvents()
{
unsigned int c = FrameStartInputEvents.Size();
for (unsigned int i = 0; i < c; i++)
{
const event_t *ev = &FrameStartInputEvents[i];
// Do not post duplicate consecutive EV_DeviceChange events.
if (ev->type == EV_DeviceChange && events[eventhead].type == EV_DeviceChange)
{
return;
continue;
}
events[eventhead] = *ev;
if (ev->type == EV_Mouse && menuactive == MENU_Off && ConsoleState != c_down && ConsoleState != c_falling && !E_Responder(ev) && !paused)
@ -332,20 +342,23 @@ void D_PostEvent (const event_t *ev)
int look = int(ev->y * m_pitch * mouse_sensitivity * 16.0);
if (invertmouse)
look = -look;
G_AddViewPitch (look, true);
G_AddViewPitch(look, true);
events[eventhead].y = 0;
}
if (!Button_Strafe.bDown && !lookstrafe)
{
G_AddViewAngle (int(ev->x * m_yaw * mouse_sensitivity * 8.0), true);
G_AddViewAngle(int(ev->x * m_yaw * mouse_sensitivity * 8.0), true);
events[eventhead].x = 0;
}
if ((events[eventhead].x | events[eventhead].y) == 0)
{
return;
continue;
}
}
eventhead = (eventhead+1)&(MAXEVENTS-1);
eventhead = (eventhead + 1)&(MAXEVENTS - 1);
}
FrameStartInputEvents.Clear();
}
//==========================================================================
@ -1042,11 +1055,19 @@ void D_DoomLoop ()
}
I_SetFrameTime();
// Grab input events at the beginning of the frame.
// This ensures the mouse movement matches I_GetTimeFrac precisely.
I_StartTic();
// Tick the playsim
network.TryRunTics();
// Update display, next frame, with current state.
I_StartTic ();
// Apply the events we recorded in I_StartTic as the events for the next frame.
D_AddPostedEvents();
// Render frame and present
D_Display ();
if (wantToRestart)
{
wantToRestart = false;