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420: Combine speed and duration logic for fade lighting

This commit is contained in:
mazmazz 2018-09-15 19:00:50 -04:00
parent 714464993e
commit ab4a825385
3 changed files with 21 additions and 48 deletions
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61
src/p_lights.c
View File

@ -13,6 +13,7 @@
/// Fire flicker, light flash, strobe flash, lightning flash, glow, and fade.
#include "doomdef.h"
#include "doomstat.h"
#include "p_local.h"
#include "r_state.h"
#include "z_zone.h"
@ -327,7 +328,8 @@ glow_t *P_SpawnAdjustableGlowingLight(sector_t *minsector, sector_t *maxsector,
*
* \param sector Target sector
* \param destvalue The final light value in these sectors.
* \param speed Speed of the fade; the change to the ligh
* \param speed If tic-based: total duration of effect.
* If speed-based: Speed of the fade; the change to the ligh
* level in each sector per tic.
* \param ticbased Use a specific duration for the fade, defined by speed
* \sa T_LightFade
@ -357,13 +359,13 @@ void P_FadeLightBySector(sector_t *sector, INT32 destvalue, INT32 speed, boolean
if (ticbased)
{
ll->ticbased = true;
ll->timer = ll->speed = abs(speed); // use ll->speed for total duration
ll->timer = ll->duration = abs(speed); // speed means duration
}
else
{
ll->ticbased = false;
ll->timer = -1;
ll->speed = abs(speed);
ll->timer = abs(ll->destlevel - ll->sourcelevel);
ll->duration = abs(speed); // ll->duration is used as speed
}
}
@ -382,49 +384,20 @@ void P_FadeLight(INT16 tag, INT32 destvalue, INT32 speed, boolean ticbased)
*/
void T_LightFade(lightlevel_t *ll)
{
if (ll->ticbased)
if ((ll->ticbased && --ll->timer <= 0)
|| (!ll->ticbased && (ll->timer -= ll->duration) <= 0))
{
if (--ll->timer <= 0)
{
ll->sector->lightlevel = ll->destlevel; // set to dest lightlevel
P_RemoveLighting(ll->sector); // clear lightingdata, remove thinker
}
else
{
INT16 delta = abs(ll->destlevel - ll->sourcelevel);
fixed_t factor = min(FixedDiv(ll->speed - ll->timer, ll->speed), 1*FRACUNIT);
if (ll->destlevel < ll->sourcelevel)
ll->sector->lightlevel = max(min(ll->sector->lightlevel, ll->sourcelevel - (INT16)FixedMul(delta, factor)), ll->destlevel);
else if (ll->destlevel > ll->sourcelevel)
ll->sector->lightlevel = min(max(ll->sector->lightlevel, ll->sourcelevel + (INT16)FixedMul(delta, factor)), ll->destlevel);
}
return;
}
if (ll->sector->lightlevel < ll->destlevel)
{
// increase the lightlevel
if (ll->sector->lightlevel + ll->speed >= ll->destlevel)
{
// stop changing light level
ll->sector->lightlevel = ll->destlevel; // set to dest lightlevel
P_RemoveLighting(ll->sector); // clear lightingdata, remove thinker
}
else
ll->sector->lightlevel += ll->speed; // move lightlevel
ll->sector->lightlevel = ll->destlevel; // set to dest lightlevel
P_RemoveLighting(ll->sector); // clear lightingdata, remove thinker
}
else
{
// decrease lightlevel
if (ll->sector->lightlevel - ll->speed <= ll->destlevel)
{
// stop changing light level
ll->sector->lightlevel = ll->destlevel; // set to dest lightlevel
P_RemoveLighting(ll->sector); // clear lightingdata, remove thinker
}
else
ll->sector->lightlevel -= ll->speed; // move lightlevel
INT16 delta = abs(ll->destlevel - ll->sourcelevel);
INT32 duration = ll->ticbased ? ll->duration : delta; // speed-based: timer's initial value is equal to delta
fixed_t factor = min(FixedDiv(duration - ll->timer, duration), 1*FRACUNIT);
if (ll->destlevel < ll->sourcelevel)
ll->sector->lightlevel = max(min(ll->sector->lightlevel, ll->sourcelevel - (INT16)FixedMul(delta, factor)), ll->destlevel);
else if (ll->destlevel > ll->sourcelevel)
ll->sector->lightlevel = min(max(ll->sector->lightlevel, ll->sourcelevel + (INT16)FixedMul(delta, factor)), ll->destlevel);
}
}

4
src/p_saveg.c
View File

@ -1561,8 +1561,8 @@ static void SaveLightlevelThinker(const thinker_t *th, const UINT8 type)
WRITEUINT32(save_p, SaveSector(ht->sector));
WRITEINT16(save_p, ht->sourcelevel);
WRITEINT16(save_p, ht->destlevel);
WRITEINT16(save_p, ht->speed);
WRITEUINT8(save_p, (UINT8)ht->ticbased);
WRITEINT16(save_p, ht->duration);
WRITEINT32(save_p, ht->timer);
}
@ -2537,8 +2537,8 @@ static inline void LoadLightlevelThinker(actionf_p1 thinker)
ht->sector = LoadSector(READUINT32(save_p));
ht->sourcelevel = READINT16(save_p);
ht->destlevel = READINT16(save_p);
ht->speed = READINT16(save_p);
ht->ticbased = (boolean)READUINT8(save_p);
ht->duration = READINT16(save_p);
ht->timer = READINT32(save_p);
if (ht->sector)
ht->sector->lightingdata = ht;

4
src/p_spec.h
View File

@ -138,11 +138,11 @@ typedef struct
sector_t *sector; ///< Sector where action is taking place.
INT16 sourcelevel; ///< Light level we're fading from.
INT16 destlevel; ///< Light level we're fading to.
INT16 speed; ///< Speed at which to change light level. OR: Tic-based duration
// Tic-based behavior
boolean ticbased; ///< Tic-based logic
INT32 timer; ///< Tic-based timer
INT16 duration; ///< If tic-based: duration of effect. If speed-based: amount to increment
INT32 timer; ///< Internal timer
} lightlevel_t;
#define GLOWSPEED 8