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render: factor out iterative drawing of node surfaces

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Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
This commit is contained in:
Kevin Shanahan 2013-01-02 10:17:46 +10:30
parent 371e16cbd8
commit dd8c9132d8
1 changed files with 55 additions and 50 deletions
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105
common/r_bsp.c
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@ -425,6 +425,51 @@ R_DrawSubmodelPolygons(const entity_t *e, model_t *pmodel, int clipflags)
}
}
static void
DrawBackSurfs(const entity_t *e, msurface_t *surf, int count, int clipflags)
{
while (count--) {
if ((surf->flags & SURF_PLANEBACK) && surf->visframe == r_framecount) {
if (r_drawpolys) {
if (r_worldpolysbacktofront) {
if (numbtofpolys < MAX_BTOFPOLYS) {
pbtofpolys[numbtofpolys].clipflags = clipflags;
pbtofpolys[numbtofpolys].psurf = surf;
numbtofpolys++;
}
} else {
R_RenderPoly(e, surf, clipflags);
}
} else {
R_RenderFace(e, surf, clipflags);
}
}
surf++;
}
}
static void
DrawFrontSurfs(const entity_t *e, msurface_t *surf, int count, int clipflags)
{
while (count--) {
if (!(surf->flags & SURF_PLANEBACK) && surf->visframe == r_framecount) {
if (r_drawpolys) {
if (r_worldpolysbacktofront) {
if (numbtofpolys < MAX_BTOFPOLYS) {
pbtofpolys[numbtofpolys].clipflags = clipflags;
pbtofpolys[numbtofpolys].psurf = surf;
numbtofpolys++;
}
} else {
R_RenderPoly(e, surf, clipflags);
}
} else {
R_RenderFace(e, surf, clipflags);
}
}
surf++;
}
}
/*
================
@ -434,7 +479,7 @@ R_RecursiveWorldNode
static void
R_RecursiveWorldNode(const entity_t *e, mnode_t *node, int clipflags)
{
int i, c, side, *pindex;
int i, count, side, *pindex;
vec3_t acceptpt, rejectpt;
mplane_t *plane;
msurface_t *surf, **mark;
@ -488,13 +533,13 @@ R_RecursiveWorldNode(const entity_t *e, mnode_t *node, int clipflags)
pleaf = (mleaf_t *)node;
mark = pleaf->firstmarksurface;
c = pleaf->nummarksurfaces;
count = pleaf->nummarksurfaces;
if (c) {
if (count) {
do {
(*mark)->visframe = r_framecount;
mark++;
} while (--c);
} while (--count);
}
// deal with model fragments in this leaf
@ -528,54 +573,14 @@ R_RecursiveWorldNode(const entity_t *e, mnode_t *node, int clipflags)
R_RecursiveWorldNode(e, node->children[side], clipflags);
// draw stuff
c = node->numsurfaces;
if (c) {
count = node->numsurfaces;
if (count) {
surf = cl.worldmodel->surfaces + node->firstsurface;
if (dot < -BACKFACE_EPSILON)
DrawBackSurfs(e, surf, count, clipflags);
else if (dot > BACKFACE_EPSILON)
DrawFrontSurfs(e, surf, count, clipflags);
if (dot < -BACKFACE_EPSILON) {
do {
if ((surf->flags & SURF_PLANEBACK) &&
(surf->visframe == r_framecount)) {
if (r_drawpolys) {
if (r_worldpolysbacktofront) {
if (numbtofpolys < MAX_BTOFPOLYS) {
pbtofpolys[numbtofpolys].clipflags =
clipflags;
pbtofpolys[numbtofpolys].psurf = surf;
numbtofpolys++;
}
} else {
R_RenderPoly(e, surf, clipflags);
}
} else {
R_RenderFace(e, surf, clipflags);
}
}
surf++;
} while (--c);
} else if (dot > BACKFACE_EPSILON) {
do {
if (!(surf->flags & SURF_PLANEBACK) &&
(surf->visframe == r_framecount)) {
if (r_drawpolys) {
if (r_worldpolysbacktofront) {
if (numbtofpolys < MAX_BTOFPOLYS) {
pbtofpolys[numbtofpolys].clipflags =
clipflags;
pbtofpolys[numbtofpolys].psurf = surf;
numbtofpolys++;
}
} else {
R_RenderPoly(e, surf, clipflags);
}
} else {
R_RenderFace(e, surf, clipflags);
}
}
surf++;
} while (--c);
}
// all surfaces on the same node share the same sequence number
r_currentkey++;
}