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Strand render shadow now only renders lines for shadow instead

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of polygons, to avoid shadow flicker between frames.

Added some code that makes it possible to generate APixbuf's
from strands.
This commit is contained in:
Brecht Van Lommel
2008-01-14 10:00:20 +00:00
parent eebab74464
commit 2262d0a45a
3 changed files with 33 additions and 19 deletions
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2
source/blender/render/intern/include/strand.h
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@@ -86,7 +86,7 @@ typedef struct StrandSegment {
} StrandSegment;
void strand_eval_point(StrandSegment *sseg, StrandPoint *spoint);
void render_strand_segment(struct Render *re, float winmat[][4], struct StrandPart *spart, struct ZSpan *zspan, StrandSegment *sseg);
void render_strand_segment(struct Render *re, float winmat[][4], struct StrandPart *spart, struct ZSpan *zspan, int totzspan, StrandSegment *sseg);
void project_strands(Render *re, void (*projectfunc)(float *, float mat[][4], float *), int do_pano, int do_buckets);
struct RenderBuckets *init_buckets(struct Render *re);

48
source/blender/render/intern/source/strand.c
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@@ -758,7 +758,7 @@ static void do_scanconvert_strand(Render *re, StrandPart *spart, ZSpan *zspan, f
zspan_scanconvert_strand(zspan, spart, jco1, jco3, jco4, do_strand_blend);
}
static void strand_render(Render *re, float winmat[][4], StrandPart *spart, ZSpan *zspan, StrandPoint *p1, StrandPoint *p2)
static void strand_render(Render *re, StrandSegment *sseg, float winmat[][4], StrandPart *spart, ZSpan *zspan, int totzspan, StrandPoint *p1, StrandPoint *p2)
{
if(spart) {
float t= p2->t;
@@ -774,17 +774,27 @@ static void strand_render(Render *re, float winmat[][4], StrandPart *spart, ZSpa
}
else {
float hoco1[4], hoco2[3];
int a, obi, index;
obi= sseg->obi - re->objectinstance;
index= sseg->strand->index;
projectvert(p1->co, winmat, hoco1);
projectvert(p2->co, winmat, hoco2);
/* render both strand and single pixel wire to counter aliasing */
zbufclip4(zspan, 0, 0, p1->hoco2, p1->hoco1, p2->hoco1, p2->hoco2, p1->clip2, p1->clip1, p2->clip1, p2->clip2);
zbufsinglewire(zspan, 0, 0, hoco1, hoco2);
projectvert(p1->co, winmat, hoco1);
projectvert(p2->co, winmat, hoco2);
for(a=0; a<totzspan; a++) {
#if 0
/* render both strand and single pixel wire to counter aliasing */
zbufclip4(re, &zspan[a], obi, index, p1->hoco2, p1->hoco1, p2->hoco1, p2->hoco2, p1->clip2, p1->clip1, p2->clip1, p2->clip2);
#endif
/* only render a line for now, which makes the shadow map more
similiar across frames, and so reduces flicker */
zbufsinglewire(&zspan[a], obi, index, hoco1, hoco2);
}
}
}
static int strand_segment_recursive(Render *re, float winmat[][4], StrandPart *spart, ZSpan *zspan, StrandSegment *sseg, StrandPoint *p1, StrandPoint *p2, int depth)
static int strand_segment_recursive(Render *re, float winmat[][4], StrandPart *spart, ZSpan *zspan, int totzspan, StrandSegment *sseg, StrandPoint *p1, StrandPoint *p2, int depth)
{
StrandPoint p;
StrandBuffer *buffer= sseg->buffer;
@@ -817,21 +827,23 @@ static int strand_segment_recursive(Render *re, float winmat[][4], StrandPart *s
do_strand_point_project(winmat, zspan, p.co2, p.hoco2, p.zco2);
}
else {
#if 0
projectvert(p.co1, winmat, p.hoco1);
projectvert(p.co2, winmat, p.hoco2);
p.clip1= testclip(p.hoco1);
p.clip2= testclip(p.hoco2);
#endif
}
if(!strand_segment_recursive(re, winmat, spart, zspan, sseg, p1, &p, depth+1))
strand_render(re, winmat, spart, zspan, p1, &p);
if(!strand_segment_recursive(re, winmat, spart, zspan, sseg, &p, p2, depth+1))
strand_render(re, winmat, spart, zspan, &p, p2);
if(!strand_segment_recursive(re, winmat, spart, zspan, totzspan, sseg, p1, &p, depth+1))
strand_render(re, sseg, winmat, spart, zspan, totzspan, p1, &p);
if(!strand_segment_recursive(re, winmat, spart, zspan, totzspan, sseg, &p, p2, depth+1))
strand_render(re, sseg, winmat, spart, zspan, totzspan, &p, p2);
return 1;
}
void render_strand_segment(Render *re, float winmat[][4], StrandPart *spart, ZSpan *zspan, StrandSegment *sseg)
void render_strand_segment(Render *re, float winmat[][4], StrandPart *spart, ZSpan *zspan, int totzspan, StrandSegment *sseg)
{
StrandBuffer *buffer= sseg->buffer;
StrandPoint *p1= &sseg->point1;
@@ -852,6 +864,7 @@ void render_strand_segment(Render *re, float winmat[][4], StrandPart *spart, ZSp
do_strand_point_project(winmat, zspan, p2->co2, p2->hoco2, p2->zco2);
}
else {
#if 0
projectvert(p1->co1, winmat, p1->hoco1);
projectvert(p1->co2, winmat, p1->hoco2);
projectvert(p2->co1, winmat, p2->hoco1);
@@ -860,10 +873,11 @@ void render_strand_segment(Render *re, float winmat[][4], StrandPart *spart, ZSp
p1->clip2= testclip(p1->hoco2);
p2->clip1= testclip(p2->hoco1);
p2->clip2= testclip(p2->hoco2);
#endif
}
if(!strand_segment_recursive(re, winmat, spart, zspan, sseg, p1, p2, 0))
strand_render(re, winmat, spart, zspan, p1, p2);
if(!strand_segment_recursive(re, winmat, spart, zspan, totzspan, sseg, p1, p2, 0))
strand_render(re, sseg, winmat, spart, zspan, totzspan, p1, p2);
}
static void zbuffer_strands_filter(Render *re, RenderPart *pa, RenderLayer *rl, StrandPart *spart, float *pass)
@@ -1128,7 +1142,7 @@ unsigned short *zbuffer_strands_shade(Render *re, RenderPart *pa, RenderLayer *r
spart.segment= &sseg;
render_strand_segment(re, winmat, &spart, &zspan, &sseg);
render_strand_segment(re, winmat, &spart, &zspan, 1, &sseg);
}
}

2
source/blender/render/intern/source/zbuf.c
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@@ -2354,7 +2354,7 @@ void zbuffer_shadow(Render *re, float winmat[][4], LampRen *lar, int *rectz, int
c4= zbuf_shadow_project(cache, sseg.v[3]-strand->vert, obwinmat, sseg.v[3]->co, ho4);
if(!(c1 & c2 & c3 & c4))
render_strand_segment(NULL, winmat, NULL, &zspan, &sseg);
render_strand_segment(re, winmat, NULL, &zspan, 1, &sseg);
}
}