// CL_KeyState
//
// Returns 0.25 if a key was pressed and released during the frame,
// 0.5 if it was pressed and held
// 0 if held then released, and
// 1.0 if held for the entire time
static float KeyState(ref kbutton_t key)
{
bool impulsedown = (key.state & 2) != 0;
bool impulseup = (key.state & 4) != 0;
bool down = key.IsDown;// ->state & 1;
float val = 0;
if (impulsedown && !impulseup)
{
if (down)
{
val = 0.5f; // pressed and held this frame
}
else
{
val = 0; // I_Error ();
}
}
if (impulseup && !impulsedown)
{
if (down)
{
val = 0; // I_Error ();
}
else
{
val = 0; // released this frame
}
}
if (!impulsedown && !impulseup)
{
if (down)
{
val = 1.0f; // held the entire frame
}
else
{
val = 0; // up the entire frame
}
}
if (impulsedown && impulseup)
{
if (down)
{
val = 0.75f; // released and re-pressed this frame
}
else
{
val = 0.25f; // pressed and released this frame
}
}
key.state &= 1; // clear impulses
return(val);
}
static void KeyUp(ref kbutton_t b)
{
int k;
string c = Cmd.Argv(1);
if (!String.IsNullOrEmpty(c))
{
k = int.Parse(c);
}
else
{
// typed manually at the console, assume for unsticking, so clear all
b.down0 = b.down1 = 0;
b.state = 4; // impulse up
return;
}
if (b.down0 == k)
{
b.down0 = 0;
}
else if (b.down1 == k)
{
b.down1 = 0;
}
else
{
return; // key up without coresponding down (menu pass through)
}
if (b.down0 != 0 || b.down1 != 0)
{
return; // some other key is still holding it down
}
if ((b.state & 1) == 0)
{
return; // still up (this should not happen)
}
b.state &= ~1; // now up
b.state |= 4; // impulse up
}
static void KeyDown(ref kbutton_t b)
{
int k;
string c = Cmd.Argv(1);
if (!String.IsNullOrEmpty(c))
{
k = int.Parse(c);
}
else
{
k = -1; // typed manually at the console for continuous down
}
if (k == b.down0 || k == b.down1)
{
return; // repeating key
}
if (b.down0 == 0)
{
b.down0 = k;
}
else if (b.down1 == 0)
{
b.down1 = k;
}
else
{
Con.Print("Three keys down for a button!\n");
return;
}
if ((b.state & 1) != 0)
{
return; // still down
}
b.state |= 1 + 2; // down + impulse down
}