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test2/source/blender/render/intern/source/shadeinput.c
Matt Ebb b89138564e Changes to Color Management 
After testing and feedback, I've decided to slightly modify the way color 
management works internally. While the previous method worked well for 
rendering, was a smaller transition and had some advantages over this
new method, it was a bit more ambiguous, and was making things difficult 
for other areas such as compositing.

This implementation now considers all color data (with only a couple of 
exceptions such as brush colors) to be stored in linear RGB color space, 
rather than sRGB as previously. This brings it in line with Nuke, which also 
operates this way, quite successfully. Color swatches, pickers, color ramp 
display are now gamma corrected to display gamma so you can see what 
you're doing, but the numbers themselves are considered linear. This 
makes understanding blending modes more clear (a 0.5 value on overlay 
will not change the result now) as well as making color swatches act more 
predictably in the compositor, however bringing over color values from 
applications like photoshop or gimp, that operate in a gamma space, 
will give identical results.

This commit will convert over existing files saved by earlier 2.5 versions to 
work generally the same, though there may be some slight differences with 
things like textures. Now that we're set on changing other areas of shading, 
this won't be too disruptive overall.

I've made a diagram explaining the pipeline here:
http://mke3.net/blender/devel/2.5/25_linear_workflow_pipeline.png

and some docs here:
http://www.blender.org/development/release-logs/blender-250/color-management/
2009-12-02 07:56:34 +00:00

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/**
* $Id:
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2006 Blender Foundation
* All rights reserved.
*
* Contributors: Hos, Robert Wenzlaff.
*
* ***** END GPL LICENSE BLOCK *****
*/
#include <stdio.h>
#include <math.h>
#include <string.h>
#include "BLI_math.h"
#include "BLI_blenlib.h"
#include "DNA_curve_types.h"
#include "DNA_group_types.h"
#include "DNA_lamp_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_material_types.h"
#include "BKE_colortools.h"
#include "BKE_utildefines.h"
#include "BKE_node.h"
/* local include */
#include "raycounter.h"
#include "renderpipeline.h"
#include "render_types.h"
#include "renderdatabase.h"
#include "rendercore.h"
#include "shadbuf.h"
#include "shading.h"
#include "strand.h"
#include "texture.h"
#include "volumetric.h"
#include "zbuf.h"
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
/* defined in pipeline.c, is hardcopy of active dynamic allocated Render */
/* only to be used here in this file, it's for speed */
extern struct Render R;
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
#define VECADDISFAC(v1,v3,fac) {*(v1)+= *(v3)*(fac); *(v1+1)+= *(v3+1)*(fac); *(v1+2)+= *(v3+2)*(fac);}
/* Shade Sample order:
- shade_samples_fill_with_ps()
- for each sample
- shade_input_set_triangle() <- if prev sample-face is same, use shade_input_copy_triangle()
- if vlr
- shade_input_set_viewco() <- not for ray or bake
- shade_input_set_uv() <- not for ray or bake
- shade_input_set_normals()
- shade_samples()
- if AO
- shade_samples_do_AO()
- if shading happens
- for each sample
- shade_input_set_shade_texco()
- shade_samples_do_shade()
- OSA: distribute sample result with filter masking
*/
/* initialise material variables in shadeinput,
* doing inverse gamma correction where applicable */
void shade_input_init_material(ShadeInput *shi)
{
/* note, keep this synced with render_types.h */
memcpy(&shi->r, &shi->mat->r, 23*sizeof(float));
shi->har= shi->mat->har;
}
/* also used as callback for nodes */
/* delivers a fully filled in ShadeResult, for all passes */
void shade_material_loop(ShadeInput *shi, ShadeResult *shr)
{
shade_lamp_loop(shi, shr); /* clears shr */
if(shi->translucency!=0.0f) {
ShadeResult shr_t;
float fac= shi->translucency;
shade_input_init_material(shi);
VECCOPY(shi->vn, shi->vno);
VECMUL(shi->vn, -1.0f);
VECMUL(shi->facenor, -1.0f);
shi->depth++; /* hack to get real shadow now */
shade_lamp_loop(shi, &shr_t);
shi->depth--;
/* a couple of passes */
VECADDISFAC(shr->combined, shr_t.combined, fac);
if(shi->passflag & SCE_PASS_SPEC)
VECADDISFAC(shr->spec, shr_t.spec, fac);
if(shi->passflag & SCE_PASS_DIFFUSE)
VECADDISFAC(shr->diff, shr_t.diff, fac);
if(shi->passflag & SCE_PASS_SHADOW)
VECADDISFAC(shr->shad, shr_t.shad, fac);
VECMUL(shi->vn, -1.0f);
VECMUL(shi->facenor, -1.0f);
}
/* depth >= 1 when ray-shading */
if(shi->depth==0) {
if(R.r.mode & R_RAYTRACE) {
if(shi->ray_mirror!=0.0f || ((shi->mat->mode & MA_TRANSP) && (shi->mat->mode & MA_RAYTRANSP) && shr->alpha!=1.0f)) {
/* ray trace works on combined, but gives pass info */
ray_trace(shi, shr);
}
}
/* disable adding of sky for raytransp */
if((shi->mat->mode & MA_TRANSP) && (shi->mat->mode & MA_RAYTRANSP))
if((shi->layflag & SCE_LAY_SKY) && (R.r.alphamode==R_ADDSKY))
shr->alpha= 1.0f;
}
if(R.r.mode & R_RAYTRACE) {
if (R.render_volumes_inside.first)
shade_volume_inside(shi, shr);
}
}
/* do a shade, finish up some passes, apply mist */
void shade_input_do_shade(ShadeInput *shi, ShadeResult *shr)
{
float alpha;
/* ------ main shading loop -------- */
#ifdef RE_RAYCOUNTER
memset(&shi->raycounter, 0, sizeof(shi->raycounter));
#endif
if(shi->mat->nodetree && shi->mat->use_nodes) {
ntreeShaderExecTree(shi->mat->nodetree, shi, shr);
}
else {
/* copy all relevant material vars, note, keep this synced with render_types.h */
shade_input_init_material(shi);
if (shi->mat->material_type == MA_TYPE_VOLUME) {
if(R.r.mode & R_RAYTRACE)
shade_volume_outside(shi, shr);
} else { /* MA_TYPE_SURFACE, MA_TYPE_WIRE */
shade_material_loop(shi, shr);
}
}
/* copy additional passes */
if(shi->passflag & (SCE_PASS_VECTOR|SCE_PASS_NORMAL|SCE_PASS_RADIO)) {
QUATCOPY(shr->winspeed, shi->winspeed);
VECCOPY(shr->nor, shi->vn);
}
/* MIST */
if((shi->passflag & SCE_PASS_MIST) || ((R.wrld.mode & WO_MIST) && (shi->mat->mode & MA_NOMIST)==0)) {
if(R.r.mode & R_ORTHO)
shr->mist= mistfactor(-shi->co[2], shi->co);
else
shr->mist= mistfactor(len_v3(shi->co), shi->co);
}
else shr->mist= 0.0f;
if((R.wrld.mode & WO_MIST) && (shi->mat->mode & MA_NOMIST)==0 ) {
alpha= shr->mist;
}
else alpha= 1.0f;
/* add mist and premul color */
if(shr->alpha!=1.0f || alpha!=1.0f) {
float fac= alpha*(shr->alpha);
shr->combined[3]= fac;
if (shi->mat->material_type!= MA_TYPE_VOLUME)
mul_v3_fl(shr->combined, fac);
}
else
shr->combined[3]= 1.0f;
/* add z */
shr->z= -shi->co[2];
/* RAYHITS */
/*
if(1 || shi->passflag & SCE_PASS_RAYHITS)
{
shr->rayhits[0] = (float)shi->raycounter.faces.test;
shr->rayhits[1] = (float)shi->raycounter.bb.hit;
shr->rayhits[2] = 0.0;
shr->rayhits[3] = 1.0;
}
*/
RE_RC_MERGE(&re_rc_counter[shi->thread], &shi->raycounter);
}
/* **************************************************************************** */
/* ShadeInput */
/* **************************************************************************** */
void vlr_set_uv_indices(VlakRen *vlr, int *i1, int *i2, int *i3)
{
/* to prevent storing new tfaces or vcols, we check a split runtime */
/* 4---3 4---3 */
/* |\ 1| or |1 /| */
/* |0\ | |/ 0| */
/* 1---2 1---2 0 = orig face, 1 = new face */
/* Update vert nums to point to correct verts of original face */
if(vlr->flag & R_DIVIDE_24) {
if(vlr->flag & R_FACE_SPLIT) {
(*i1)++; (*i2)++; (*i3)++;
}
else {
(*i3)++;
}
}
else if(vlr->flag & R_FACE_SPLIT) {
(*i2)++; (*i3)++;
}
}
/* copy data from face to ShadeInput, general case */
/* indices 0 1 2 3 only */
void shade_input_set_triangle_i(ShadeInput *shi, ObjectInstanceRen *obi, VlakRen *vlr, short i1, short i2, short i3)
{
VertRen **vpp= &vlr->v1;
shi->vlr= vlr;
shi->obi= obi;
shi->obr= obi->obr;
shi->v1= vpp[i1];
shi->v2= vpp[i2];
shi->v3= vpp[i3];
shi->i1= i1;
shi->i2= i2;
shi->i3= i3;
/* note, shi->mat is set in node shaders */
shi->mat= shi->mat_override?shi->mat_override:vlr->mat;
shi->osatex= (shi->mat->texco & TEXCO_OSA);
shi->mode= shi->mat->mode_l; /* or-ed result for all nodes */
/* facenormal copy, can get flipped */
shi->flippednor= RE_vlakren_get_normal(&R, obi, vlr, shi->facenor);
/* copy of original pre-flipped normal, for geometry->front/back node output */
VECCOPY(shi->orignor, shi->facenor);
if(shi->flippednor)
VECMUL(shi->orignor, -1.0f);
/* calculate vertexnormals */
if(vlr->flag & R_SMOOTH) {
VECCOPY(shi->n1, shi->v1->n);
VECCOPY(shi->n2, shi->v2->n);
VECCOPY(shi->n3, shi->v3->n);
if(obi->flag & R_TRANSFORMED) {
mul_m3_v3(obi->nmat, shi->n1);
mul_m3_v3(obi->nmat, shi->n2);
mul_m3_v3(obi->nmat, shi->n3);
}
if(!(vlr->flag & (R_NOPUNOFLIP|R_TANGENT))) {
if(INPR(shi->facenor, shi->n1) < 0.0f) {
shi->n1[0]= -shi->n1[0];
shi->n1[1]= -shi->n1[1];
shi->n1[2]= -shi->n1[2];
}
if(INPR(shi->facenor, shi->n2) < 0.0f) {
shi->n2[0]= -shi->n2[0];
shi->n2[1]= -shi->n2[1];
shi->n2[2]= -shi->n2[2];
}
if(INPR(shi->facenor, shi->n3) < 0.0f) {
shi->n3[0]= -shi->n3[0];
shi->n3[1]= -shi->n3[1];
shi->n3[2]= -shi->n3[2];
}
}
}
}
/* note, facenr declared volatile due to over-eager -O2 optimizations
* on cygwin (particularly -frerun-cse-after-loop)
*/
/* copy data from face to ShadeInput, scanline case */
void shade_input_set_triangle(ShadeInput *shi, volatile int obi, volatile int facenr, int normal_flip)
{
if(facenr>0) {
shi->obi= &R.objectinstance[obi];
shi->obr= shi->obi->obr;
shi->facenr= (facenr-1) & RE_QUAD_MASK;
if( shi->facenr < shi->obr->totvlak ) {
VlakRen *vlr= RE_findOrAddVlak(shi->obr, shi->facenr);
if(facenr & RE_QUAD_OFFS)
shade_input_set_triangle_i(shi, shi->obi, vlr, 0, 2, 3);
else
shade_input_set_triangle_i(shi, shi->obi, vlr, 0, 1, 2);
}
else
shi->vlr= NULL; /* general signal we got sky */
}
else
shi->vlr= NULL; /* general signal we got sky */
}
/* full osa case: copy static info */
void shade_input_copy_triangle(ShadeInput *shi, ShadeInput *from)
{
/* not so nice, but works... warning is in RE_shader_ext.h */
memcpy(shi, from, sizeof(struct ShadeInputCopy));
}
/* copy data from strand to shadeinput */
void shade_input_set_strand(ShadeInput *shi, StrandRen *strand, StrandPoint *spoint)
{
/* note, shi->mat is set in node shaders */
shi->mat= shi->mat_override? shi->mat_override: strand->buffer->ma;
shi->osatex= (shi->mat->texco & TEXCO_OSA);
shi->mode= shi->mat->mode_l; /* or-ed result for all nodes */
/* shade_input_set_viewco equivalent */
VECCOPY(shi->co, spoint->co);
VECCOPY(shi->view, shi->co);
normalize_v3(shi->view);
shi->xs= (int)spoint->x;
shi->ys= (int)spoint->y;
if(shi->osatex || (R.r.mode & R_SHADOW)) {
VECCOPY(shi->dxco, spoint->dtco);
VECCOPY(shi->dyco, spoint->dsco);
}
/* dxview, dyview, not supported */
/* facenormal, simply viewco flipped */
VECCOPY(shi->facenor, spoint->nor);
VECCOPY(shi->orignor, shi->facenor);
/* shade_input_set_normals equivalent */
if(shi->mat->mode & MA_TANGENT_STR) {
VECCOPY(shi->vn, spoint->tan)
}
else {
float cross[3];
cross_v3_v3v3(cross, spoint->co, spoint->tan);
cross_v3_v3v3(shi->vn, cross, spoint->tan);
normalize_v3(shi->vn);
if(INPR(shi->vn, shi->view) < 0.0f)
negate_v3(shi->vn);
}
VECCOPY(shi->vno, shi->vn);
}
void shade_input_set_strand_texco(ShadeInput *shi, StrandRen *strand, StrandVert *svert, StrandPoint *spoint)
{
StrandBuffer *strandbuf= strand->buffer;
ObjectRen *obr= strandbuf->obr;
StrandVert *sv;
int mode= shi->mode; /* or-ed result for all nodes */
short texco= shi->mat->texco;
if((shi->mat->texco & TEXCO_REFL)) {
/* shi->dxview, shi->dyview, not supported */
}
if(shi->osatex && (texco & (TEXCO_NORM|TEXCO_REFL))) {
/* not supported */
}
if(mode & (MA_TANGENT_V|MA_NORMAP_TANG)) {
VECCOPY(shi->tang, spoint->tan);
VECCOPY(shi->nmaptang, spoint->tan);
}
if(mode & MA_STR_SURFDIFF) {
float *surfnor= RE_strandren_get_surfnor(obr, strand, 0);
if(surfnor)
VECCOPY(shi->surfnor, surfnor)
else
VECCOPY(shi->surfnor, shi->vn)
if(shi->mat->strand_surfnor > 0.0f) {
shi->surfdist= 0.0f;
for(sv=strand->vert; sv!=svert; sv++)
shi->surfdist+=len_v3v3(sv->co, (sv+1)->co);
shi->surfdist += spoint->t*len_v3v3(sv->co, (sv+1)->co);
}
}
if(R.r.mode & R_SPEED) {
float *speed;
speed= RE_strandren_get_winspeed(shi->obi, strand, 0);
if(speed)
QUATCOPY(shi->winspeed, speed)
else
shi->winspeed[0]= shi->winspeed[1]= shi->winspeed[2]= shi->winspeed[3]= 0.0f;
}
/* shade_input_set_shade_texco equivalent */
if(texco & NEED_UV) {
if(texco & TEXCO_ORCO) {
VECCOPY(shi->lo, strand->orco);
/* no shi->osatex, orco derivatives are zero */
}
if(texco & TEXCO_GLOB) {
VECCOPY(shi->gl, shi->co);
mul_m4_v3(R.viewinv, shi->gl);
if(shi->osatex) {
VECCOPY(shi->dxgl, shi->dxco);
mul_m3_v3(R.imat, shi->dxco);
VECCOPY(shi->dygl, shi->dyco);
mul_m3_v3(R.imat, shi->dyco);
}
}
if(texco & TEXCO_STRAND) {
shi->strandco= spoint->strandco;
if(shi->osatex) {
shi->dxstrand= spoint->dtstrandco;
shi->dystrand= 0.0f;
}
}
if((texco & TEXCO_UV) || (mode & (MA_VERTEXCOL|MA_VERTEXCOLP|MA_FACETEXTURE))) {
MCol *mcol;
float *uv;
char *name;
int i;
shi->totuv= 0;
shi->totcol= 0;
shi->actuv= obr->actmtface;
shi->actcol= obr->actmcol;
if(mode & (MA_VERTEXCOL|MA_VERTEXCOLP)) {
for (i=0; (mcol=RE_strandren_get_mcol(obr, strand, i, &name, 0)); i++) {
ShadeInputCol *scol= &shi->col[i];
char *cp= (char*)mcol;
shi->totcol++;
scol->name= name;
scol->col[0]= cp[3]/255.0f;
scol->col[1]= cp[2]/255.0f;
scol->col[2]= cp[1]/255.0f;
}
if(shi->totcol) {
shi->vcol[0]= shi->col[shi->actcol].col[0];
shi->vcol[1]= shi->col[shi->actcol].col[1];
shi->vcol[2]= shi->col[shi->actcol].col[2];
}
else {
shi->vcol[0]= 0.0f;
shi->vcol[1]= 0.0f;
shi->vcol[2]= 0.0f;
}
}
for (i=0; (uv=RE_strandren_get_uv(obr, strand, i, &name, 0)); i++) {
ShadeInputUV *suv= &shi->uv[i];
shi->totuv++;
suv->name= name;
if(strandbuf->overrideuv == i) {
suv->uv[0]= -1.0f;
suv->uv[1]= spoint->strandco;
suv->uv[2]= 0.0f;
}
else {
suv->uv[0]= -1.0f + 2.0f*uv[0];
suv->uv[1]= -1.0f + 2.0f*uv[1];
suv->uv[2]= 0.0f; /* texture.c assumes there are 3 coords */
}
if(shi->osatex) {
suv->dxuv[0]= 0.0f;
suv->dxuv[1]= 0.0f;
suv->dyuv[0]= 0.0f;
suv->dyuv[1]= 0.0f;
}
if((mode & MA_FACETEXTURE) && i==obr->actmtface) {
if((mode & (MA_VERTEXCOL|MA_VERTEXCOLP))==0) {
shi->vcol[0]= 1.0f;
shi->vcol[1]= 1.0f;
shi->vcol[2]= 1.0f;
}
}
}
if(shi->totuv == 0) {
ShadeInputUV *suv= &shi->uv[0];
suv->uv[0]= 0.0f;
suv->uv[1]= spoint->strandco;
suv->uv[2]= 0.0f; /* texture.c assumes there are 3 coords */
if(mode & MA_FACETEXTURE) {
/* no tface? set at 1.0f */
shi->vcol[0]= 1.0f;
shi->vcol[1]= 1.0f;
shi->vcol[2]= 1.0f;
}
}
}
if(texco & TEXCO_NORM) {
shi->orn[0]= -shi->vn[0];
shi->orn[1]= -shi->vn[1];
shi->orn[2]= -shi->vn[2];
}
if(texco & TEXCO_REFL) {
/* mirror reflection color textures (and envmap) */
calc_R_ref(shi); /* wrong location for normal maps! XXXXXXXXXXXXXX */
}
if(texco & TEXCO_STRESS) {
/* not supported */
}
if(texco & TEXCO_TANGENT) {
if((mode & MA_TANGENT_V)==0) {
/* just prevent surprises */
shi->tang[0]= shi->tang[1]= shi->tang[2]= 0.0f;
shi->nmaptang[0]= shi->nmaptang[1]= shi->nmaptang[2]= 0.0f;
}
}
}
/* this only avalailable for scanline renders */
if(shi->depth==0) {
if(texco & TEXCO_WINDOW) {
shi->winco[0]= -1.0f + 2.0f*spoint->x/(float)R.winx;
shi->winco[1]= -1.0f + 2.0f*spoint->y/(float)R.winy;
shi->winco[2]= 0.0f;
/* not supported */
if(shi->osatex) {
shi->dxwin[0]= 0.0f;
shi->dywin[1]= 0.0f;
shi->dxwin[0]= 0.0f;
shi->dywin[1]= 0.0f;
}
}
if(texco & TEXCO_STICKY) {
/* not supported */
}
}
if (R.r.color_mgt_flag & R_COLOR_MANAGEMENT) {
if(mode & (MA_VERTEXCOL|MA_VERTEXCOLP|MA_FACETEXTURE)) {
srgb_to_linearrgb_v3_v3(shi->vcol, shi->vcol);
}
}
}
/* from scanline pixel coordinates to 3d coordinates, requires set_triangle */
void shade_input_calc_viewco(ShadeInput *shi, float x, float y, float z, float *view, float *dxyview, float *co, float *dxco, float *dyco)
{
/* returns not normalized, so is in viewplane coords */
calc_view_vector(view, x, y);
if(shi->mat->material_type == MA_TYPE_WIRE) {
/* wire cannot use normal for calculating shi->co, so
* we reconstruct the coordinate less accurate */
if(R.r.mode & R_ORTHO)
calc_renderco_ortho(co, x, y, z);
else
calc_renderco_zbuf(co, view, z);
}
else {
/* for non-wire, intersect with the triangle to get the exact coord */
float fac, dface, v1[3];
VECCOPY(v1, shi->v1->co);
if(shi->obi->flag & R_TRANSFORMED)
mul_m4_v3(shi->obi->mat, v1);
dface= v1[0]*shi->facenor[0]+v1[1]*shi->facenor[1]+v1[2]*shi->facenor[2];
/* ortho viewplane cannot intersect using view vector originating in (0,0,0) */
if(R.r.mode & R_ORTHO) {
/* x and y 3d coordinate can be derived from pixel coord and winmat */
float fx= 2.0f/(R.winx*R.winmat[0][0]);
float fy= 2.0f/(R.winy*R.winmat[1][1]);
co[0]= (x - 0.5f*R.winx)*fx - R.winmat[3][0]/R.winmat[0][0];
co[1]= (y - 0.5f*R.winy)*fy - R.winmat[3][1]/R.winmat[1][1];
/* using a*x + b*y + c*z = d equation, (a b c) is normal */
if(shi->facenor[2]!=0.0f)
co[2]= (dface - shi->facenor[0]*co[0] - shi->facenor[1]*co[1])/shi->facenor[2];
else
co[2]= 0.0f;
if(dxco && dyco) {
dxco[0]= fx;
dxco[1]= 0.0f;
if(shi->facenor[2]!=0.0f)
dxco[2]= (shi->facenor[0]*fx)/shi->facenor[2];
else
dxco[2]= 0.0f;
dyco[0]= 0.0f;
dyco[1]= fy;
if(shi->facenor[2]!=0.0f)
dyco[2]= (shi->facenor[1]*fy)/shi->facenor[2];
else
dyco[2]= 0.0f;
if(dxyview) {
if(co[2]!=0.0f) fac= 1.0f/co[2]; else fac= 0.0f;
dxyview[0]= -R.viewdx*fac;
dxyview[1]= -R.viewdy*fac;
}
}
}
else {
float div;
div= shi->facenor[0]*view[0] + shi->facenor[1]*view[1] + shi->facenor[2]*view[2];
if (div!=0.0f) fac= dface/div;
else fac= 0.0f;
co[0]= fac*view[0];
co[1]= fac*view[1];
co[2]= fac*view[2];
/* pixel dx/dy for render coord */
if(dxco && dyco) {
float u= dface/(div - R.viewdx*shi->facenor[0]);
float v= dface/(div - R.viewdy*shi->facenor[1]);
dxco[0]= co[0]- (view[0]-R.viewdx)*u;
dxco[1]= co[1]- (view[1])*u;
dxco[2]= co[2]- (view[2])*u;
dyco[0]= co[0]- (view[0])*v;
dyco[1]= co[1]- (view[1]-R.viewdy)*v;
dyco[2]= co[2]- (view[2])*v;
if(dxyview) {
if(fac!=0.0f) fac= 1.0f/fac;
dxyview[0]= -R.viewdx*fac;
dxyview[1]= -R.viewdy*fac;
}
}
}
}
/* set camera coords - for scanline, it's always 0.0,0.0,0.0 (render is in camera space)
* however for raytrace it can be different - the position of the last intersection */
shi->camera_co[0] = shi->camera_co[1] = shi->camera_co[2] = 0.0f;
/* cannot normalize earlier, code above needs it at viewplane level */
normalize_v3(view);
}
/* from scanline pixel coordinates to 3d coordinates, requires set_triangle */
void shade_input_set_viewco(ShadeInput *shi, float x, float y, float xs, float ys, float z)
{
float *dxyview= NULL, *dxco= NULL, *dyco= NULL;
/* currently in use for dithering (soft shadow), node preview, irregular shad */
shi->xs= (int)xs;
shi->ys= (int)ys;
/* original scanline coordinate without jitter */
shi->scanco[0]= x;
shi->scanco[1]= y;
shi->scanco[2]= z;
/* check if we need derivatives */
if(shi->osatex || (R.r.mode & R_SHADOW)) {
dxco= shi->dxco;
dyco= shi->dyco;
if((shi->mat->texco & TEXCO_REFL))
dxyview= &shi->dxview;
}
shade_input_calc_viewco(shi, xs, ys, z, shi->view, dxyview, shi->co, dxco, dyco);
}
/* calculate U and V, for scanline (silly render face u and v are in range -1 to 0) */
void shade_input_set_uv(ShadeInput *shi)
{
VlakRen *vlr= shi->vlr;
if((vlr->flag & R_SMOOTH) || (shi->mat->texco & NEED_UV) || (shi->passflag & SCE_PASS_UV)) {
float v1[3], v2[3], v3[3];
VECCOPY(v1, shi->v1->co);
VECCOPY(v2, shi->v2->co);
VECCOPY(v3, shi->v3->co);
if(shi->obi->flag & R_TRANSFORMED) {
mul_m4_v3(shi->obi->mat, v1);
mul_m4_v3(shi->obi->mat, v2);
mul_m4_v3(shi->obi->mat, v3);
}
/* exception case for wire render of edge */
if(vlr->v2==vlr->v3) {
float lend, lenc;
lend= len_v3v3(v2, v1);
lenc= len_v3v3(shi->co, v1);
if(lend==0.0f) {
shi->u=shi->v= 0.0f;
}
else {
shi->u= - (1.0f - lenc/lend);
shi->v= 0.0f;
}
if(shi->osatex) {
shi->dx_u= 0.0f;
shi->dx_v= 0.0f;
shi->dy_u= 0.0f;
shi->dy_v= 0.0f;
}
}
else {
/* most of this could become re-used for faces */
float detsh, t00, t10, t01, t11, xn, yn, zn;
int axis1, axis2;
/* find most stable axis to project */
xn= fabs(shi->facenor[0]);
yn= fabs(shi->facenor[1]);
zn= fabs(shi->facenor[2]);
if(zn>=xn && zn>=yn) { axis1= 0; axis2= 1; }
else if(yn>=xn && yn>=zn) { axis1= 0; axis2= 2; }
else { axis1= 1; axis2= 2; }
/* compute u,v and derivatives */
t00= v3[axis1]-v1[axis1]; t01= v3[axis2]-v1[axis2];
t10= v3[axis1]-v2[axis1]; t11= v3[axis2]-v2[axis2];
detsh= 1.0f/(t00*t11-t10*t01);
t00*= detsh; t01*=detsh;
t10*=detsh; t11*=detsh;
shi->u= (shi->co[axis1]-v3[axis1])*t11-(shi->co[axis2]-v3[axis2])*t10;
shi->v= (shi->co[axis2]-v3[axis2])*t00-(shi->co[axis1]-v3[axis1])*t01;
if(shi->osatex) {
shi->dx_u= shi->dxco[axis1]*t11- shi->dxco[axis2]*t10;
shi->dx_v= shi->dxco[axis2]*t00- shi->dxco[axis1]*t01;
shi->dy_u= shi->dyco[axis1]*t11- shi->dyco[axis2]*t10;
shi->dy_v= shi->dyco[axis2]*t00- shi->dyco[axis1]*t01;
}
/* u and v are in range -1 to 0, we allow a little bit extra but not too much, screws up speedvectors */
CLAMP(shi->u, -2.0f, 1.0f);
CLAMP(shi->v, -2.0f, 1.0f);
}
}
}
void shade_input_set_normals(ShadeInput *shi)
{
float u= shi->u, v= shi->v;
float l= 1.0f+u+v;
/* calculate vertexnormals */
if(shi->vlr->flag & R_SMOOTH) {
float *n1= shi->n1, *n2= shi->n2, *n3= shi->n3;
shi->vn[0]= l*n3[0]-u*n1[0]-v*n2[0];
shi->vn[1]= l*n3[1]-u*n1[1]-v*n2[1];
shi->vn[2]= l*n3[2]-u*n1[2]-v*n2[2];
normalize_v3(shi->vn);
}
else
VECCOPY(shi->vn, shi->facenor);
/* used in nodes */
VECCOPY(shi->vno, shi->vn);
}
/* use by raytrace, sss, bake to flip into the right direction */
void shade_input_flip_normals(ShadeInput *shi)
{
shi->facenor[0]= -shi->facenor[0];
shi->facenor[1]= -shi->facenor[1];
shi->facenor[2]= -shi->facenor[2];
shi->vn[0]= -shi->vn[0];
shi->vn[1]= -shi->vn[1];
shi->vn[2]= -shi->vn[2];
shi->vno[0]= -shi->vno[0];
shi->vno[1]= -shi->vno[1];
shi->vno[2]= -shi->vno[2];
shi->flippednor= !shi->flippednor;
}
void shade_input_set_shade_texco(ShadeInput *shi)
{
ObjectInstanceRen *obi= shi->obi;
ObjectRen *obr= shi->obr;
VertRen *v1= shi->v1, *v2= shi->v2, *v3= shi->v3;
float u= shi->u, v= shi->v;
float l= 1.0f+u+v, dl;
int mode= shi->mode; /* or-ed result for all nodes */
short texco= shi->mat->texco;
/* calculate dxno */
if(shi->vlr->flag & R_SMOOTH) {
if(shi->osatex && (texco & (TEXCO_NORM|TEXCO_REFL)) ) {
float *n1= shi->n1, *n2= shi->n2, *n3= shi->n3;
dl= shi->dx_u+shi->dx_v;
shi->dxno[0]= dl*n3[0]-shi->dx_u*n1[0]-shi->dx_v*n2[0];
shi->dxno[1]= dl*n3[1]-shi->dx_u*n1[1]-shi->dx_v*n2[1];
shi->dxno[2]= dl*n3[2]-shi->dx_u*n1[2]-shi->dx_v*n2[2];
dl= shi->dy_u+shi->dy_v;
shi->dyno[0]= dl*n3[0]-shi->dy_u*n1[0]-shi->dy_v*n2[0];
shi->dyno[1]= dl*n3[1]-shi->dy_u*n1[1]-shi->dy_v*n2[1];
shi->dyno[2]= dl*n3[2]-shi->dy_u*n1[2]-shi->dy_v*n2[2];
}
}
/* calc tangents */
if (mode & (MA_TANGENT_V|MA_NORMAP_TANG) || R.flag & R_NEED_TANGENT) {
float *tangent, *s1, *s2, *s3;
float tl, tu, tv;
if(shi->vlr->flag & R_SMOOTH) {
tl= l;
tu= u;
tv= v;
}
else {
/* qdn: flat faces have tangents too,
could pick either one, using average here */
tl= 1.0f/3.0f;
tu= -1.0f/3.0f;
tv= -1.0f/3.0f;
}
shi->tang[0]= shi->tang[1]= shi->tang[2]= 0.0f;
shi->nmaptang[0]= shi->nmaptang[1]= shi->nmaptang[2]= 0.0f;
if(mode & MA_TANGENT_V) {
s1 = RE_vertren_get_tangent(obr, v1, 0);
s2 = RE_vertren_get_tangent(obr, v2, 0);
s3 = RE_vertren_get_tangent(obr, v3, 0);
if(s1 && s2 && s3) {
shi->tang[0]= (tl*s3[0] - tu*s1[0] - tv*s2[0]);
shi->tang[1]= (tl*s3[1] - tu*s1[1] - tv*s2[1]);
shi->tang[2]= (tl*s3[2] - tu*s1[2] - tv*s2[2]);
if(obi->flag & R_TRANSFORMED)
mul_m3_v3(obi->nmat, shi->tang);
normalize_v3(shi->tang);
VECCOPY(shi->nmaptang, shi->tang);
}
}
if(mode & MA_NORMAP_TANG || R.flag & R_NEED_TANGENT) {
tangent= RE_vlakren_get_nmap_tangent(obr, shi->vlr, 0);
if(tangent) {
int j1= shi->i1, j2= shi->i2, j3= shi->i3;
vlr_set_uv_indices(shi->vlr, &j1, &j2, &j3);
s1= &tangent[j1*3];
s2= &tangent[j2*3];
s3= &tangent[j3*3];
shi->nmaptang[0]= (tl*s3[0] - tu*s1[0] - tv*s2[0]);
shi->nmaptang[1]= (tl*s3[1] - tu*s1[1] - tv*s2[1]);
shi->nmaptang[2]= (tl*s3[2] - tu*s1[2] - tv*s2[2]);
if(obi->flag & R_TRANSFORMED)
mul_m3_v3(obi->nmat, shi->nmaptang);
normalize_v3(shi->nmaptang);
}
}
}
if(mode & MA_STR_SURFDIFF) {
float *surfnor= RE_vlakren_get_surfnor(obr, shi->vlr, 0);
if(surfnor) {
VECCOPY(shi->surfnor, surfnor)
if(obi->flag & R_TRANSFORMED)
mul_m3_v3(obi->nmat, shi->surfnor);
}
else
VECCOPY(shi->surfnor, shi->vn)
shi->surfdist= 0.0f;
}
if(R.r.mode & R_SPEED) {
float *s1, *s2, *s3;
s1= RE_vertren_get_winspeed(obi, v1, 0);
s2= RE_vertren_get_winspeed(obi, v2, 0);
s3= RE_vertren_get_winspeed(obi, v3, 0);
if(s1 && s2 && s3) {
shi->winspeed[0]= (l*s3[0] - u*s1[0] - v*s2[0]);
shi->winspeed[1]= (l*s3[1] - u*s1[1] - v*s2[1]);
shi->winspeed[2]= (l*s3[2] - u*s1[2] - v*s2[2]);
shi->winspeed[3]= (l*s3[3] - u*s1[3] - v*s2[3]);
}
else {
shi->winspeed[0]= shi->winspeed[1]= shi->winspeed[2]= shi->winspeed[3]= 0.0f;
}
}
/* pass option forces UV calc */
if(shi->passflag & SCE_PASS_UV)
texco |= (NEED_UV|TEXCO_UV);
/* texture coordinates. shi->dxuv shi->dyuv have been set */
if(texco & NEED_UV) {
if(texco & TEXCO_ORCO) {
if(v1->orco) {
float *o1, *o2, *o3;
o1= v1->orco;
o2= v2->orco;
o3= v3->orco;
shi->lo[0]= l*o3[0]-u*o1[0]-v*o2[0];
shi->lo[1]= l*o3[1]-u*o1[1]-v*o2[1];
shi->lo[2]= l*o3[2]-u*o1[2]-v*o2[2];
if(shi->osatex) {
dl= shi->dx_u+shi->dx_v;
shi->dxlo[0]= dl*o3[0]-shi->dx_u*o1[0]-shi->dx_v*o2[0];
shi->dxlo[1]= dl*o3[1]-shi->dx_u*o1[1]-shi->dx_v*o2[1];
shi->dxlo[2]= dl*o3[2]-shi->dx_u*o1[2]-shi->dx_v*o2[2];
dl= shi->dy_u+shi->dy_v;
shi->dylo[0]= dl*o3[0]-shi->dy_u*o1[0]-shi->dy_v*o2[0];
shi->dylo[1]= dl*o3[1]-shi->dy_u*o1[1]-shi->dy_v*o2[1];
shi->dylo[2]= dl*o3[2]-shi->dy_u*o1[2]-shi->dy_v*o2[2];
}
}
VECCOPY(shi->duplilo, obi->dupliorco);
}
if(texco & TEXCO_GLOB) {
VECCOPY(shi->gl, shi->co);
mul_m4_v3(R.viewinv, shi->gl);
if(shi->osatex) {
VECCOPY(shi->dxgl, shi->dxco);
// TXF: bug was here, but probably should be in convertblender.c, R.imat only valid if there is a world
//mul_m3_v3(R.imat, shi->dxco);
mul_mat3_m4_v3(R.viewinv, shi->dxco);
VECCOPY(shi->dygl, shi->dyco);
//mul_m3_v3(R.imat, shi->dyco);
mul_mat3_m4_v3(R.viewinv, shi->dyco);
}
}
if(texco & TEXCO_STRAND) {
shi->strandco= (l*v3->accum - u*v1->accum - v*v2->accum);
if(shi->osatex) {
dl= shi->dx_u+shi->dx_v;
shi->dxstrand= dl*v3->accum-shi->dx_u*v1->accum-shi->dx_v*v2->accum;
dl= shi->dy_u+shi->dy_v;
shi->dystrand= dl*v3->accum-shi->dy_u*v1->accum-shi->dy_v*v2->accum;
}
}
if((texco & TEXCO_UV) || (mode & (MA_VERTEXCOL|MA_VERTEXCOLP|MA_FACETEXTURE))) {
VlakRen *vlr= shi->vlr;
MTFace *tface;
MCol *mcol;
char *name;
int i, j1=shi->i1, j2=shi->i2, j3=shi->i3;
/* uv and vcols are not copied on split, so set them according vlr divide flag */
vlr_set_uv_indices(vlr, &j1, &j2, &j3);
shi->totuv= 0;
shi->totcol= 0;
shi->actuv= obr->actmtface;
shi->actcol= obr->actmcol;
if(mode & (MA_VERTEXCOL|MA_VERTEXCOLP)) {
for (i=0; (mcol=RE_vlakren_get_mcol(obr, vlr, i, &name, 0)); i++) {
ShadeInputCol *scol= &shi->col[i];
char *cp1, *cp2, *cp3;
shi->totcol++;
scol->name= name;
cp1= (char *)(mcol+j1);
cp2= (char *)(mcol+j2);
cp3= (char *)(mcol+j3);
scol->col[0]= (l*((float)cp3[3]) - u*((float)cp1[3]) - v*((float)cp2[3]))/255.0f;
scol->col[1]= (l*((float)cp3[2]) - u*((float)cp1[2]) - v*((float)cp2[2]))/255.0f;
scol->col[2]= (l*((float)cp3[1]) - u*((float)cp1[1]) - v*((float)cp2[1]))/255.0f;
}
if(shi->totcol) {
shi->vcol[0]= shi->col[shi->actcol].col[0];
shi->vcol[1]= shi->col[shi->actcol].col[1];
shi->vcol[2]= shi->col[shi->actcol].col[2];
shi->vcol[3]= 1.0f;
}
else {
shi->vcol[0]= 0.0f;
shi->vcol[1]= 0.0f;
shi->vcol[2]= 0.0f;
shi->vcol[3]= 1.0f;
}
}
for (i=0; (tface=RE_vlakren_get_tface(obr, vlr, i, &name, 0)); i++) {
ShadeInputUV *suv= &shi->uv[i];
float *uv1, *uv2, *uv3;
shi->totuv++;
suv->name= name;
uv1= tface->uv[j1];
uv2= tface->uv[j2];
uv3= tface->uv[j3];
suv->uv[0]= -1.0f + 2.0f*(l*uv3[0]-u*uv1[0]-v*uv2[0]);
suv->uv[1]= -1.0f + 2.0f*(l*uv3[1]-u*uv1[1]-v*uv2[1]);
suv->uv[2]= 0.0f; /* texture.c assumes there are 3 coords */
if(shi->osatex) {
float duv[2];
dl= shi->dx_u+shi->dx_v;
duv[0]= shi->dx_u;
duv[1]= shi->dx_v;
suv->dxuv[0]= 2.0f*(dl*uv3[0]-duv[0]*uv1[0]-duv[1]*uv2[0]);
suv->dxuv[1]= 2.0f*(dl*uv3[1]-duv[0]*uv1[1]-duv[1]*uv2[1]);
dl= shi->dy_u+shi->dy_v;
duv[0]= shi->dy_u;
duv[1]= shi->dy_v;
suv->dyuv[0]= 2.0f*(dl*uv3[0]-duv[0]*uv1[0]-duv[1]*uv2[0]);
suv->dyuv[1]= 2.0f*(dl*uv3[1]-duv[0]*uv1[1]-duv[1]*uv2[1]);
}
if((mode & MA_FACETEXTURE) && i==obr->actmtface) {
if((mode & (MA_VERTEXCOL|MA_VERTEXCOLP))==0) {
shi->vcol[0]= 1.0f;
shi->vcol[1]= 1.0f;
shi->vcol[2]= 1.0f;
shi->vcol[3]= 1.0f;
}
if(tface && tface->tpage)
render_realtime_texture(shi, tface->tpage);
}
}
shi->dupliuv[0]= -1.0f + 2.0f*obi->dupliuv[0];
shi->dupliuv[1]= -1.0f + 2.0f*obi->dupliuv[1];
shi->dupliuv[2]= 0.0f;
if(shi->totuv == 0) {
ShadeInputUV *suv= &shi->uv[0];
suv->uv[0]= 2.0f*(u+.5f);
suv->uv[1]= 2.0f*(v+.5f);
suv->uv[2]= 0.0f; /* texture.c assumes there are 3 coords */
if(mode & MA_FACETEXTURE) {
/* no tface? set at 1.0f */
shi->vcol[0]= 1.0f;
shi->vcol[1]= 1.0f;
shi->vcol[2]= 1.0f;
shi->vcol[3]= 1.0f;
}
}
}
if(texco & TEXCO_NORM) {
shi->orn[0]= -shi->vn[0];
shi->orn[1]= -shi->vn[1];
shi->orn[2]= -shi->vn[2];
}
if(texco & TEXCO_REFL) {
/* mirror reflection color textures (and envmap) */
calc_R_ref(shi); /* wrong location for normal maps! XXXXXXXXXXXXXX */
}
if(texco & TEXCO_STRESS) {
float *s1, *s2, *s3;
s1= RE_vertren_get_stress(obr, v1, 0);
s2= RE_vertren_get_stress(obr, v2, 0);
s3= RE_vertren_get_stress(obr, v3, 0);
if(s1 && s2 && s3) {
shi->stress= l*s3[0] - u*s1[0] - v*s2[0];
if(shi->stress<1.0f) shi->stress-= 1.0f;
else shi->stress= (shi->stress-1.0f)/shi->stress;
}
else shi->stress= 0.0f;
}
if(texco & TEXCO_TANGENT) {
if((mode & MA_TANGENT_V)==0) {
/* just prevent surprises */
shi->tang[0]= shi->tang[1]= shi->tang[2]= 0.0f;
shi->nmaptang[0]= shi->nmaptang[1]= shi->nmaptang[2]= 0.0f;
}
}
}
/* this only avalailable for scanline renders */
if(shi->depth==0) {
float x= shi->xs;
float y= shi->ys;
if(texco & TEXCO_WINDOW) {
shi->winco[0]= -1.0f + 2.0f*x/(float)R.winx;
shi->winco[1]= -1.0f + 2.0f*y/(float)R.winy;
shi->winco[2]= 0.0f;
if(shi->osatex) {
shi->dxwin[0]= 2.0f/(float)R.winx;
shi->dywin[1]= 2.0f/(float)R.winy;
shi->dxwin[1]= shi->dxwin[2]= 0.0f;
shi->dywin[0]= shi->dywin[2]= 0.0f;
}
}
if(texco & TEXCO_STICKY) {
float *s1, *s2, *s3;
s1= RE_vertren_get_sticky(obr, v1, 0);
s2= RE_vertren_get_sticky(obr, v2, 0);
s3= RE_vertren_get_sticky(obr, v3, 0);
if(s1 && s2 && s3) {
float obwinmat[4][4], winmat[4][4], ho1[4], ho2[4], ho3[4];
float Zmulx, Zmuly;
float hox, hoy, l, dl, u, v;
float s00, s01, s10, s11, detsh;
/* old globals, localized now */
Zmulx= ((float)R.winx)/2.0f; Zmuly= ((float)R.winy)/2.0f;
zbuf_make_winmat(&R, winmat);
if(shi->obi->flag & R_TRANSFORMED)
mul_m4_m4m4(obwinmat, obi->mat, winmat);
else
copy_m4_m4(obwinmat, winmat);
zbuf_render_project(obwinmat, v1->co, ho1);
zbuf_render_project(obwinmat, v2->co, ho2);
zbuf_render_project(obwinmat, v3->co, ho3);
s00= ho3[0]/ho3[3] - ho1[0]/ho1[3];
s01= ho3[1]/ho3[3] - ho1[1]/ho1[3];
s10= ho3[0]/ho3[3] - ho2[0]/ho2[3];
s11= ho3[1]/ho3[3] - ho2[1]/ho2[3];
detsh= s00*s11-s10*s01;
s00/= detsh; s01/=detsh;
s10/=detsh; s11/=detsh;
/* recalc u and v again */
hox= x/Zmulx -1.0f;
hoy= y/Zmuly -1.0f;
u= (hox - ho3[0]/ho3[3])*s11 - (hoy - ho3[1]/ho3[3])*s10;
v= (hoy - ho3[1]/ho3[3])*s00 - (hox - ho3[0]/ho3[3])*s01;
l= 1.0f+u+v;
shi->sticky[0]= l*s3[0]-u*s1[0]-v*s2[0];
shi->sticky[1]= l*s3[1]-u*s1[1]-v*s2[1];
shi->sticky[2]= 0.0f;
if(shi->osatex) {
float dxuv[2], dyuv[2];
dxuv[0]= s11/Zmulx;
dxuv[1]= - s01/Zmulx;
dyuv[0]= - s10/Zmuly;
dyuv[1]= s00/Zmuly;
dl= dxuv[0] + dxuv[1];
shi->dxsticky[0]= dl*s3[0] - dxuv[0]*s1[0] - dxuv[1]*s2[0];
shi->dxsticky[1]= dl*s3[1] - dxuv[0]*s1[1] - dxuv[1]*s2[1];
dl= dyuv[0] + dyuv[1];
shi->dysticky[0]= dl*s3[0] - dyuv[0]*s1[0] - dyuv[1]*s2[0];
shi->dysticky[1]= dl*s3[1] - dyuv[0]*s1[1] - dyuv[1]*s2[1];
}
}
}
} /* else {
Note! For raytracing winco is not set, important because thus means all shader input's need to have their variables set to zero else in-initialized values are used
*/
if (R.r.color_mgt_flag & R_COLOR_MANAGEMENT) {
if(mode & (MA_VERTEXCOL|MA_VERTEXCOLP|MA_FACETEXTURE)) {
srgb_to_linearrgb_v3_v3(shi->vcol, shi->vcol);
}
}
}
/* ****************** ShadeSample ************************************** */
/* initialize per part, not per pixel! */
void shade_input_initialize(ShadeInput *shi, RenderPart *pa, RenderLayer *rl, int sample)
{
memset(shi, 0, sizeof(ShadeInput));
shi->sample= sample;
shi->thread= pa->thread;
shi->do_preview= (R.r.scemode & R_MATNODE_PREVIEW) != 0;
shi->lay= rl->lay;
shi->layflag= rl->layflag;
shi->passflag= rl->passflag;
shi->combinedflag= ~rl->pass_xor;
shi->mat_override= rl->mat_override;
shi->light_override= rl->light_override;
// shi->rl= rl;
/* note shi.depth==0 means first hit, not raytracing */
}
/* initialize per part, not per pixel! */
void shade_sample_initialize(ShadeSample *ssamp, RenderPart *pa, RenderLayer *rl)
{
int a, tot;
tot= R.osa==0?1:R.osa;
for(a=0; a<tot; a++) {
shade_input_initialize(&ssamp->shi[a], pa, rl, a);
memset(&ssamp->shr[a], 0, sizeof(ShadeResult));
}
get_sample_layers(pa, rl, ssamp->rlpp);
}
/* Do AO or (future) GI */
void shade_samples_do_AO(ShadeSample *ssamp)
{
ShadeInput *shi;
int sample;
if(!(R.r.mode & R_SHADOW))
return;
if(!(R.r.mode & R_RAYTRACE) && !(R.wrld.ao_gather_method == WO_AOGATHER_APPROX))
return;
if(R.wrld.mode & WO_AMB_OCC) {
shi= &ssamp->shi[0];
if(((shi->passflag & SCE_PASS_COMBINED) && (shi->combinedflag & SCE_PASS_AO))
|| (shi->passflag & SCE_PASS_AO))
for(sample=0, shi= ssamp->shi; sample<ssamp->tot; shi++, sample++)
if(!(shi->mode & MA_SHLESS))
ambient_occlusion(shi); /* stores in shi->ao[] */
}
}
void shade_samples_fill_with_ps(ShadeSample *ssamp, PixStr *ps, int x, int y)
{
ShadeInput *shi;
float xs, ys;
ssamp->tot= 0;
for(shi= ssamp->shi; ps; ps= ps->next) {
shade_input_set_triangle(shi, ps->obi, ps->facenr, 1);
if(shi->vlr) { /* NULL happens for env material or for 'all z' */
unsigned short curmask= ps->mask;
/* full osa is only set for OSA renders */
if(shi->vlr->flag & R_FULL_OSA) {
short shi_cp= 0, samp;
for(samp=0; samp<R.osa; samp++) {
if(curmask & (1<<samp)) {
/* zbuffer has this inverse corrected, ensures xs,ys are inside pixel */
xs= (float)x + R.jit[samp][0] + 0.5f;
ys= (float)y + R.jit[samp][1] + 0.5f;
if(shi_cp)
shade_input_copy_triangle(shi, shi-1);
shi->mask= (1<<samp);
// shi->rl= ssamp->rlpp[samp];
shi->samplenr= R.shadowsamplenr[shi->thread]++; /* this counter is not being reset per pixel */
shade_input_set_viewco(shi, x, y, xs, ys, (float)ps->z);
shade_input_set_uv(shi);
shade_input_set_normals(shi);
shi_cp= 1;
shi++;
}
}
}
else {
if(R.osa) {
short b= R.samples->centmask[curmask];
xs= (float)x + R.samples->centLut[b & 15] + 0.5f;
ys= (float)y + R.samples->centLut[b>>4] + 0.5f;
}
else {
xs= (float)x + 0.5f;
ys= (float)y + 0.5f;
}
shi->mask= curmask;
shi->samplenr= R.shadowsamplenr[shi->thread]++;
shade_input_set_viewco(shi, x, y, xs, ys, (float)ps->z);
shade_input_set_uv(shi);
shade_input_set_normals(shi);
shi++;
}
/* total sample amount, shi->sample is static set in initialize */
if(shi!=ssamp->shi)
ssamp->tot= (shi-1)->sample + 1;
}
}
}
/* shades samples, returns true if anything happened */
int shade_samples(ShadeSample *ssamp, PixStr *ps, int x, int y)
{
shade_samples_fill_with_ps(ssamp, ps, x, y);
if(ssamp->tot) {
ShadeInput *shi= ssamp->shi;
ShadeResult *shr= ssamp->shr;
int samp;
/* if shadow or AO? */
shade_samples_do_AO(ssamp);
/* if shade (all shadepinputs have same passflag) */
if(ssamp->shi[0].passflag & ~(SCE_PASS_Z|SCE_PASS_INDEXOB)) {
for(samp=0; samp<ssamp->tot; samp++, shi++, shr++) {
shade_input_set_shade_texco(shi);
shade_input_do_shade(shi, shr);
}
}
return 1;
}
return 0;
}
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