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[model] Make firstmarksurface an int instead of pointer

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While it takes one extra step to grab the marksurface pointer,
R_MarkLeaves and R_MarkLights (the two actual users) seem to be either
the same speed or fractionally faster (by a few microseconds). I imagine
the loss gone to the extra fetch is made up for by better bandwidth
while traversing the leafs array (mleaf_t now fits in a single cache
line, so leafs are cache-aligned since hunk allocations are aligned).
This commit is contained in:
Bill Currie 2022-05-10 14:30:48 +09:00
parent 8ce463cbed
commit 0f7e6734f7
4 changed files with 17 additions and 9 deletions
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2
include/QF/model.h
View file

@ -199,7 +199,7 @@ typedef struct mleaf_s {
byte *compressed_vis;
efrag_t *efrags;
msurface_t **firstmarksurface;
int firstmarksurface;
int nummarksurfaces;
int key; // BSP sequence number for leaf's contents
byte ambient_sound_level[NUM_AMBIENTS];

19
libs/models/brush/model_brush.c
View file

@ -683,8 +683,9 @@ Mod_SetLeafFlags (mod_brush_t *brush)
for (unsigned i = 0; i < brush->modleafs; i++) {
int flags = 0;
mleaf_t *leaf = &brush->leafs[i];
msurface_t **msurf = brush->marksurfaces + leaf->firstmarksurface;
for (int j = 0; j < leaf->nummarksurfaces; j++) {
msurface_t *surf = leaf->firstmarksurface[j];
msurface_t *surf = *msurf++;
flags |= surf->flags;
}
brush->leaf_flags[i] = flags;
@ -780,7 +781,7 @@ Mod_LoadLeafs (model_t *mod, bsp_t *bsp)
p = in->contents;
out->contents = p;
out->firstmarksurface = brush->marksurfaces + in->firstmarksurface;
out->firstmarksurface = in->firstmarksurface;
out->nummarksurfaces = in->nummarksurfaces;
p = in->visofs;
@ -795,12 +796,18 @@ Mod_LoadLeafs (model_t *mod, bsp_t *bsp)
// gl underwater warp
if (out->contents != CONTENTS_EMPTY) {
for (j = 0; j < out->nummarksurfaces; j++)
out->firstmarksurface[j]->flags |= SURF_UNDERWATER;
msurface_t **msurf = brush->marksurfaces + out->firstmarksurface;
for (j = 0; j < out->nummarksurfaces; j++) {
msurface_t *surf = *msurf++;
surf->flags |= SURF_UNDERWATER;
}
}
if (isnotmap) {
for (j = 0; j < out->nummarksurfaces; j++)
out->firstmarksurface[j]->flags |= SURF_DONTWARP;
msurface_t **msurf = brush->marksurfaces + out->firstmarksurface;
for (j = 0; j < out->nummarksurfaces; j++) {
msurface_t *surf = *msurf++;
surf->flags |= SURF_DONTWARP;
}
}
}
}

2
libs/video/renderer/r_bsp.c
View file

@ -79,7 +79,7 @@ R_MarkLeaves (mleaf_t *viewleaf)
if (set_is_member (vis, i)) {
leaf = &brush->leafs[i + 1];
if ((c = leaf->nummarksurfaces)) {
mark = leaf->firstmarksurface;
mark = brush->marksurfaces + leaf->firstmarksurface;
do {
(*mark)->visframe = r_visframecount;
mark++;

3
libs/video/renderer/r_light.c
View file

@ -304,8 +304,9 @@ R_MarkLights (const vec3_t lightorigin, dlight_t *light, int lightnum,
continue;
if (R_CullBox (r_refdef.frustum, leaf->mins, leaf->maxs))
continue;
msurface_t **msurf = brush->marksurfaces + leaf->firstmarksurface;
for (m = 0; m < leaf->nummarksurfaces; m++) {
msurface_t *surf = leaf->firstmarksurface[m];
msurface_t *surf = *msurf++;
if (surf->visframe != r_visframecount)
continue;
mark_surfaces (surf, lightorigin, light, lightnum);