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- Replaced sprite sorting with a stable sort. Performance at the start of

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nuts.wad seems the same.


SVN r2028 (trunk)
This commit is contained in:
Randy Heit 2009-12-18 03:05:38 +00:00
parent 1c5103c9b1
commit f6428e1cbb
2 changed files with 9 additions and 8 deletions
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4
docs/rh-log.txt
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@ -1,3 +1,7 @@
December 17, 2009
- Replaced sprite sorting with a stable sort. Performance at the start of
nuts.wad seems the same.
December 16, 2009 (Changes by Graf Zahl) December 16, 2009 (Changes by Graf Zahl)
- Fixed: Morphed players tried endlessly to switch to a weapon they picked up. - Fixed: Morphed players tried endlessly to switch to a weapon they picked up.
- fixed: P_DamageMobj just set an ice corpse's velocity to 0 to make it shatter. - fixed: P_DamageMobj just set an ice corpse's velocity to 0 to make it shatter.

13
src/r_things.cpp
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@ -23,6 +23,7 @@
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <algorithm>
#include "templates.h" #include "templates.h"
#include "doomdef.h" #include "doomdef.h"
@ -1883,13 +1884,9 @@ void R_DrawRemainingPlayerSprites()
// gain compared to the old function. // gain compared to the old function.
// //
// Sort vissprites by depth, far to near // Sort vissprites by depth, far to near
static int STACK_ARGS sv_compare (const void *arg1, const void *arg2) static bool sv_compare(vissprite_t *a, vissprite_t *b)
{ {
int diff = (*(vissprite_t **)arg2)->idepth - (*(vissprite_t **)arg1)->idepth; return a->idepth > b->idepth;
// If two sprites are the same distance, then the higher one gets precedence
if (diff == 0)
return (*(vissprite_t **)arg2)->gzt - (*(vissprite_t **)arg1)->gzt;
return diff;
} }
#if 0 #if 0
@ -2023,7 +2020,7 @@ void R_SplitVisSprites ()
} }
#endif #endif
void R_SortVisSprites (int (STACK_ARGS *compare)(const void *, const void *), size_t first) void R_SortVisSprites (bool (*compare)(vissprite_t *, vissprite_t *), size_t first)
{ {
int i; int i;
vissprite_t **spr; vissprite_t **spr;
@ -2046,7 +2043,7 @@ void R_SortVisSprites (int (STACK_ARGS *compare)(const void *, const void *), si
spritesorter[i] = *spr; spritesorter[i] = *spr;
} }
qsort (spritesorter, vsprcount, sizeof (vissprite_t *), compare); std::stable_sort(&spritesorter[0], &spritesorter[vsprcount], compare);
} }