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blender-archive/source/blender/render/intern/source/envmap.c
Alexander Romanov 4aaf5baccf Fix input for Texture node (envmap+world_space_shading) 
This patch fixes shortcoming of D2046.
The original behavior without world_space_shading flag is that Texture node expects the reflected vector in view space. But with world_space_shading it should be in world space.

In attached file you will see a simple material setup and a node material analogue.

Simple material must have the same behavior regardless world_space_shading flag.

{F318866}

Alexander (Blend4Web Team)

Reviewers: brecht

Reviewed By: brecht

Subscribers: campbellbarton, homyachetser, Evgeny_Rodygin, AlexKowel, yurikovelenov

Differential Revision: https://developer.blender.org/D2072
2016-07-04 11:08:48 +03:00

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/*
* ***** 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* Contributors: 2004/2005/2006 Blender Foundation, full recode
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/render/intern/source/envmap.c
* \ingroup render
*/
#include <math.h>
#include <string.h>
/* external modules: */
#include "BLI_math.h"
#include "BLI_blenlib.h"
#include "BLI_threads.h"
#include "BLI_utildefines.h"
#include "BLT_translation.h"
#include "IMB_imbuf_types.h"
#include "IMB_imbuf.h" /* for rectcpy */
#include "DNA_group_types.h"
#include "DNA_image_types.h"
#include "DNA_lamp_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_texture_types.h"
#include "BKE_main.h"
#include "BKE_image.h" /* BKE_imbuf_write */
#include "BKE_texture.h"
#include "BKE_scene.h"
/* this module */
#include "render_types.h"
#include "envmap.h"
#include "renderdatabase.h"
#include "renderpipeline.h"
#include "texture.h"
#include "zbuf.h"
/* ------------------------------------------------------------------------- */
static void envmap_split_ima(EnvMap *env, ImBuf *ibuf)
{
int dx, part;
/* after lock we test cube[1], if set the other thread has done it fine */
BLI_lock_thread(LOCK_IMAGE);
if (env->cube[1] == NULL) {
BKE_texture_envmap_free_data(env);
dx = ibuf->y;
dx /= 2;
if (3 * dx == ibuf->x) {
env->type = ENV_CUBE;
env->ok = ENV_OSA;
}
else if (ibuf->x == ibuf->y) {
env->type = ENV_PLANE;
env->ok = ENV_OSA;
}
else {
printf("Incorrect envmap size\n");
env->ok = 0;
env->ima->ok = 0;
}
if (env->ok) {
if (env->type == ENV_CUBE) {
for (part = 0; part < 6; part++) {
env->cube[part] = IMB_allocImBuf(dx, dx, 24, IB_rect | IB_rectfloat);
}
IMB_float_from_rect(ibuf);
IMB_rectcpy(env->cube[0], ibuf,
0, 0, 0, 0, dx, dx);
IMB_rectcpy(env->cube[1], ibuf,
0, 0, dx, 0, dx, dx);
IMB_rectcpy(env->cube[2], ibuf,
0, 0, 2 * dx, 0, dx, dx);
IMB_rectcpy(env->cube[3], ibuf,
0, 0, 0, dx, dx, dx);
IMB_rectcpy(env->cube[4], ibuf,
0, 0, dx, dx, dx, dx);
IMB_rectcpy(env->cube[5], ibuf,
0, 0, 2 * dx, dx, dx, dx);
}
else { /* ENV_PLANE */
env->cube[1] = IMB_dupImBuf(ibuf);
IMB_float_from_rect(env->cube[1]);
}
}
}
BLI_unlock_thread(LOCK_IMAGE);
}
/* ------------------------------------------------------------------------- */
/* ****************** RENDER ********************** */
/* copy current render */
static Render *envmap_render_copy(Render *re, EnvMap *env)
{
Render *envre;
float viewscale;
int cuberes;
envre = RE_NewRender("Envmap");
env->lastsize = re->r.size;
cuberes = (env->cuberes * re->r.size) / 100;
cuberes &= 0xFFFC;
/* this flag has R_ZTRA in it for example */
envre->flag = re->flag;
/* set up renderdata */
render_copy_renderdata(&envre->r, &re->r);
envre->r.mode &= ~(R_BORDER | R_PANORAMA | R_ORTHO | R_MBLUR);
BLI_listbase_clear(&envre->r.layers);
BLI_listbase_clear(&envre->r.views);
envre->r.filtertype = 0;
envre->r.tilex = envre->r.xsch / 2;
envre->r.tiley = envre->r.ysch / 2;
envre->r.size = 100;
envre->r.yasp = envre->r.xasp = 1;
RE_InitState(envre, NULL, &envre->r, NULL, cuberes, cuberes, NULL);
envre->main = re->main;
envre->scene = re->scene; /* unsure about this... */
envre->scene_color_manage = re->scene_color_manage;
envre->lay = re->lay;
/* view stuff in env render */
viewscale = (env->type == ENV_PLANE) ? env->viewscale : 1.0f;
RE_SetEnvmapCamera(envre, env->object, viewscale, env->clipsta, env->clipend);
copy_m4_m4(envre->viewmat_orig, re->viewmat_orig);
/* callbacks */
envre->display_update = re->display_update;
envre->duh = re->duh;
envre->test_break = re->test_break;
envre->tbh = re->tbh;
envre->current_scene_update = re->current_scene_update;
envre->suh = re->suh;
/* and for the evil stuff; copy the database... */
envre->totvlak = re->totvlak;
envre->totvert = re->totvert;
envre->tothalo = re->tothalo;
envre->totstrand = re->totstrand;
envre->totlamp = re->totlamp;
envre->sortedhalos = re->sortedhalos;
envre->lights = re->lights;
envre->objecttable = re->objecttable;
envre->customdata_names = re->customdata_names;
envre->raytree = re->raytree;
envre->totinstance = re->totinstance;
envre->instancetable = re->instancetable;
envre->objectinstance = re->objectinstance;
envre->qmcsamplers = re->qmcsamplers;
return envre;
}
static void envmap_free_render_copy(Render *envre)
{
envre->totvlak = 0;
envre->totvert = 0;
envre->tothalo = 0;
envre->totstrand = 0;
envre->totlamp = 0;
envre->totinstance = 0;
envre->sortedhalos = NULL;
BLI_listbase_clear(&envre->lights);
BLI_listbase_clear(&envre->objecttable);
BLI_listbase_clear(&envre->customdata_names);
envre->raytree = NULL;
BLI_listbase_clear(&envre->instancetable);
envre->objectinstance = NULL;
envre->qmcsamplers = NULL;
RE_FreeRender(envre);
}
/* ------------------------------------------------------------------------- */
static void envmap_transmatrix(float mat[4][4], int part)
{
float tmat[4][4], eul[3], rotmat[4][4];
eul[0] = eul[1] = eul[2] = 0.0;
if (part == 0) { /* neg z */
/* pass */
}
else if (part == 1) { /* pos z */
eul[0] = M_PI;
}
else if (part == 2) { /* pos y */
eul[0] = M_PI / 2.0;
}
else if (part == 3) { /* neg x */
eul[0] = M_PI / 2.0;
eul[2] = M_PI / 2.0;
}
else if (part == 4) { /* neg y */
eul[0] = M_PI / 2.0;
eul[2] = M_PI;
}
else { /* pos x */
eul[0] = M_PI / 2.0;
eul[2] = -M_PI / 2.0;
}
copy_m4_m4(tmat, mat);
eul_to_mat4(rotmat, eul);
mul_m4_m4m4(mat, tmat, rotmat);
}
/* ------------------------------------------------------------------------- */
static void env_set_imats(Render *re)
{
Base *base;
float mat[4][4];
base = re->scene->base.first;
while (base) {
mul_m4_m4m4(mat, re->viewmat, base->object->obmat);
invert_m4_m4(base->object->imat, mat);
base = base->next;
}
}
/* ------------------------------------------------------------------------- */
void env_rotate_scene(Render *re, float mat[4][4], int do_rotate)
{
ObjectRen *obr;
ObjectInstanceRen *obi;
LampRen *lar = NULL;
HaloRen *har = NULL;
float imat[3][3], mat_inverse[4][4], smat[4][4], tmat[4][4], cmat[3][3], tmpmat[4][4];
int a;
if (do_rotate == 0) {
invert_m4_m4(tmat, mat);
copy_m3_m4(imat, tmat);
copy_m4_m4(mat_inverse, mat);
}
else {
copy_m4_m4(tmat, mat);
copy_m3_m4(imat, mat);
invert_m4_m4(mat_inverse, tmat);
}
for (obi = re->instancetable.first; obi; obi = obi->next) {
/* append or set matrix depending on dupli */
if (obi->flag & R_DUPLI_TRANSFORMED) {
copy_m4_m4(tmpmat, obi->mat);
mul_m4_m4m4(obi->mat, tmat, tmpmat);
}
else if (do_rotate == 1)
copy_m4_m4(obi->mat, tmat);
else
unit_m4(obi->mat);
copy_m3_m4(cmat, obi->mat);
invert_m3_m3(obi->nmat, cmat);
transpose_m3(obi->nmat);
/* indicate the renderer has to use transform matrices */
if (do_rotate == 0)
obi->flag &= ~R_ENV_TRANSFORMED;
else {
obi->flag |= R_ENV_TRANSFORMED;
copy_m4_m4(obi->imat, mat_inverse);
}
}
for (obr = re->objecttable.first; obr; obr = obr->next) {
for (a = 0; a < obr->tothalo; a++) {
if ((a & 255) == 0) har = obr->bloha[a >> 8];
else har++;
mul_m4_v3(tmat, har->co);
}
/* imat_ren is needed for correct texture coordinates */
mul_m4_m4m4(obr->ob->imat_ren, re->viewmat, obr->ob->obmat);
invert_m4(obr->ob->imat_ren);
}
for (lar = re->lampren.first; lar; lar = lar->next) {
float lamp_imat[4][4];
/* copy from add_render_lamp */
if (do_rotate == 1)
mul_m4_m4m4(tmpmat, re->viewmat, lar->lampmat);
else
mul_m4_m4m4(tmpmat, re->viewmat_orig, lar->lampmat);
invert_m4_m4(lamp_imat, tmpmat);
copy_m3_m4(lar->mat, tmpmat);
copy_m3_m4(lar->imat, lamp_imat);
lar->vec[0]= -tmpmat[2][0];
lar->vec[1]= -tmpmat[2][1];
lar->vec[2]= -tmpmat[2][2];
normalize_v3(lar->vec);
lar->co[0]= tmpmat[3][0];
lar->co[1]= tmpmat[3][1];
lar->co[2]= tmpmat[3][2];
if (lar->type == LA_AREA) {
area_lamp_vectors(lar);
}
else if (lar->type == LA_SPOT) {
normalize_v3(lar->imat[0]);
normalize_v3(lar->imat[1]);
normalize_v3(lar->imat[2]);
lar->sh_invcampos[0] = -lar->co[0];
lar->sh_invcampos[1] = -lar->co[1];
lar->sh_invcampos[2] = -lar->co[2];
mul_m3_v3(lar->imat, lar->sh_invcampos);
lar->sh_invcampos[2] *= lar->sh_zfac;
if (lar->shb) {
if (do_rotate == 1) {
mul_m4_m4m4(smat, lar->shb->viewmat, mat_inverse);
mul_m4_m4m4(lar->shb->persmat, lar->shb->winmat, smat);
}
else mul_m4_m4m4(lar->shb->persmat, lar->shb->winmat, lar->shb->viewmat);
}
}
}
if (do_rotate) {
init_render_world(re);
env_set_imats(re);
}
}
/* ------------------------------------------------------------------------- */
static void env_layerflags(Render *re, unsigned int notlay)
{
ObjectRen *obr;
VlakRen *vlr = NULL;
int a;
/* invert notlay, so if face is in multiple layers it will still be visible,
* unless all 'notlay' bits match the face bits.
* face: 0110
* not: 0100
* ~not: 1011
* now (face & ~not) is true
*/
notlay = ~notlay;
for (obr = re->objecttable.first; obr; obr = obr->next) {
if ((obr->lay & notlay) == 0) {
for (a = 0; a < obr->totvlak; a++) {
if ((a & 255) == 0) vlr = obr->vlaknodes[a >> 8].vlak;
else vlr++;
vlr->flag |= R_HIDDEN;
}
}
}
}
static void env_hideobject(Render *re, Object *ob)
{
ObjectRen *obr;
VlakRen *vlr = NULL;
int a;
for (obr = re->objecttable.first; obr; obr = obr->next) {
for (a = 0; a < obr->totvlak; a++) {
if ((a & 255) == 0) vlr = obr->vlaknodes[a >> 8].vlak;
else vlr++;
if (obr->ob == ob)
vlr->flag |= R_HIDDEN;
}
}
}
static void env_showobjects(Render *re)
{
ObjectRen *obr;
VlakRen *vlr = NULL;
int a;
for (obr = re->objecttable.first; obr; obr = obr->next) {
for (a = 0; a < obr->totvlak; a++) {
if ((a & 255) == 0) vlr = obr->vlaknodes[a >> 8].vlak;
else vlr++;
vlr->flag &= ~R_HIDDEN;
}
}
}
/* ------------------------------------------------------------------------- */
static void render_envmap(Render *re, EnvMap *env)
{
/* only the cubemap and planar map is implemented */
Render *envre;
ImBuf *ibuf;
float orthmat[4][4];
float oldviewinv[4][4], mat[4][4], tmat[4][4];
short part;
/* need a recalc: ortho-render has no correct viewinv */
invert_m4_m4(oldviewinv, re->viewmat);
envre = envmap_render_copy(re, env);
/* precalc orthmat for object */
copy_m4_m4(orthmat, env->object->obmat);
normalize_m4(orthmat);
/* need imat later for texture imat */
mul_m4_m4m4(mat, re->viewmat, orthmat);
invert_m4_m4(tmat, mat);
copy_m3_m4(env->obimat, tmat);
for (part = 0; part < 6; part++) {
if (env->type == ENV_PLANE && part != 1)
continue;
re->display_clear(re->dch, envre->result);
copy_m4_m4(tmat, orthmat);
envmap_transmatrix(tmat, part);
invert_m4_m4(mat, tmat);
/* mat now is the camera 'viewmat' */
copy_m4_m4(envre->viewmat, mat);
copy_m4_m4(envre->viewinv, tmat);
/* we have to correct for the already rotated vertexcoords */
mul_m4_m4m4(tmat, envre->viewmat, oldviewinv);
invert_m4_m4(env->imat, tmat);
env_rotate_scene(envre, tmat, 1);
project_renderdata(envre, projectverto, 0, 0, 1);
env_layerflags(envre, env->notlay);
env_hideobject(envre, env->object);
if (re->test_break(re->tbh) == 0) {
RE_TileProcessor(envre);
}
/* rotate back */
env_showobjects(envre);
env_rotate_scene(envre, tmat, 0);
if (re->test_break(re->tbh) == 0) {
RenderLayer *rl = envre->result->layers.first;
int y;
float *alpha;
float *rect;
/* envmap is rendered independently of multiview */
rect = RE_RenderLayerGetPass(rl, SCE_PASS_COMBINED, "");
ibuf = IMB_allocImBuf(envre->rectx, envre->recty, 24, IB_rect | IB_rectfloat);
memcpy(ibuf->rect_float, rect, ibuf->channels * ibuf->x * ibuf->y * sizeof(float));
/* envmap renders without alpha */
alpha = ibuf->rect_float + 3;
for (y = ibuf->x * ibuf->y - 1; y >= 0; y--, alpha += 4)
*alpha = 1.0;
env->cube[part] = ibuf;
}
if (re->test_break(re->tbh)) break;
}
if (re->test_break(re->tbh)) BKE_texture_envmap_free_data(env);
else {
if (envre->r.mode & R_OSA) env->ok = ENV_OSA;
else env->ok = ENV_NORMAL;
env->lastframe = re->scene->r.cfra;
}
/* restore */
envmap_free_render_copy(envre);
env_set_imats(re);
}
/* ------------------------------------------------------------------------- */
void make_envmaps(Render *re)
{
Tex *tex;
bool do_init = false;
int depth = 0, trace;
if (!(re->r.mode & R_ENVMAP)) return;
/* we don't raytrace, disabling the flag will cause ray_transp render solid */
trace = (re->r.mode & R_RAYTRACE);
re->r.mode &= ~R_RAYTRACE;
re->i.infostr = IFACE_("Creating Environment maps");
re->stats_draw(re->sdh, &re->i);
/* 5 = hardcoded max recursion level */
while (depth < 5) {
tex = re->main->tex.first;
while (tex) {
if (tex->id.us && tex->type == TEX_ENVMAP) {
if (tex->env && tex->env->object) {
EnvMap *env = tex->env;
if (env->object->lay & re->lay) {
if (env->stype == ENV_LOAD) {
float orthmat[4][4], mat[4][4], tmat[4][4];
/* precalc orthmat for object */
copy_m4_m4(orthmat, env->object->obmat);
normalize_m4(orthmat);
/* need imat later for texture imat */
mul_m4_m4m4(mat, re->viewmat, orthmat);
invert_m4_m4(tmat, mat);
copy_m3_m4(env->obimat, tmat);
}
else {
/* decide if to render an envmap (again) */
if (env->depth >= depth) {
/* set 'recalc' to make sure it does an entire loop of recalcs */
if (env->ok) {
/* free when OSA, and old one isn't OSA */
if ((re->r.mode & R_OSA) && env->ok == ENV_NORMAL)
BKE_texture_envmap_free_data(env);
/* free when size larger */
else if (env->lastsize < re->r.size)
BKE_texture_envmap_free_data(env);
/* free when env is in recalcmode */
else if (env->recalc)
BKE_texture_envmap_free_data(env);
}
if (env->ok == 0 && depth == 0) env->recalc = 1;
if (env->ok == 0) {
do_init = true;
render_envmap(re, env);
if (depth == env->depth) env->recalc = 0;
}
}
}
}
}
}
tex = tex->id.next;
}
depth++;
}
if (do_init) {
re->display_init(re->dih, re->result);
re->display_clear(re->dch, re->result);
// re->flag |= R_REDRAW_PRV;
}
/* restore */
re->r.mode |= trace;
}
/* ------------------------------------------------------------------------- */
static int envcube_isect(EnvMap *env, const float vec[3], float answ[2])
{
float lambda;
int face;
if (env->type == ENV_PLANE) {
face = 1;
lambda = 1.0f / vec[2];
answ[0] = env->viewscale * lambda * vec[0];
answ[1] = -env->viewscale * lambda * vec[1];
}
else {
/* which face */
if (vec[2] <= -fabsf(vec[0]) && vec[2] <= -fabsf(vec[1]) ) {
face = 0;
lambda = -1.0f / vec[2];
answ[0] = lambda * vec[0];
answ[1] = lambda * vec[1];
}
else if (vec[2] >= fabsf(vec[0]) && vec[2] >= fabsf(vec[1])) {
face = 1;
lambda = 1.0f / vec[2];
answ[0] = lambda * vec[0];
answ[1] = -lambda * vec[1];
}
else if (vec[1] >= fabsf(vec[0])) {
face = 2;
lambda = 1.0f / vec[1];
answ[0] = lambda * vec[0];
answ[1] = lambda * vec[2];
}
else if (vec[0] <= -fabsf(vec[1])) {
face = 3;
lambda = -1.0f / vec[0];
answ[0] = lambda * vec[1];
answ[1] = lambda * vec[2];
}
else if (vec[1] <= -fabsf(vec[0])) {
face = 4;
lambda = -1.0f / vec[1];
answ[0] = -lambda * vec[0];
answ[1] = lambda * vec[2];
}
else {
face = 5;
lambda = 1.0f / vec[0];
answ[0] = -lambda * vec[1];
answ[1] = lambda * vec[2];
}
}
answ[0] = 0.5f + 0.5f * answ[0];
answ[1] = 0.5f + 0.5f * answ[1];
return face;
}
/* ------------------------------------------------------------------------- */
static void set_dxtdyt(float r_dxt[3], float r_dyt[3], const float dxt[3], const float dyt[3], int face)
{
if (face == 2 || face == 4) {
r_dxt[0] = dxt[0];
r_dyt[0] = dyt[0];
r_dxt[1] = dxt[2];
r_dyt[1] = dyt[2];
}
else if (face == 3 || face == 5) {
r_dxt[0] = dxt[1];
r_dxt[1] = dxt[2];
r_dyt[0] = dyt[1];
r_dyt[1] = dyt[2];
}
else {
r_dxt[0] = dxt[0];
r_dyt[0] = dyt[0];
r_dxt[1] = dxt[1];
r_dyt[1] = dyt[1];
}
}
/* ------------------------------------------------------------------------- */
int envmaptex(Tex *tex, const float texvec[3], float dxt[3], float dyt[3], int osatex, TexResult *texres, struct ImagePool *pool, const bool skip_load_image)
{
extern Render R; /* only in this call */
/* texvec should be the already reflected normal */
EnvMap *env;
ImBuf *ibuf;
float fac, vec[3], sco[3], dxts[3], dyts[3];
int face, face1;
env = tex->env;
if (env == NULL || (env->stype != ENV_LOAD && env->object == NULL)) {
texres->tin = 0.0;
return 0;
}
if (env->stype == ENV_LOAD) {
env->ima = tex->ima;
if (env->ima && env->ima->ok) {
if (env->cube[1] == NULL) {
ImBuf *ibuf_ima = BKE_image_pool_acquire_ibuf(env->ima, NULL, pool);
if (ibuf_ima)
envmap_split_ima(env, ibuf_ima);
else
env->ok = 0;
if (env->type == ENV_PLANE)
tex->extend = TEX_EXTEND;
BKE_image_pool_release_ibuf(env->ima, ibuf_ima, pool);
}
}
}
if (env->ok == 0) {
texres->tin = 0.0;
return 0;
}
/* rotate to envmap space, if object is set */
copy_v3_v3(vec, texvec);
if (env->object) {
mul_m3_v3(env->obimat, vec);
if (osatex) {
mul_m3_v3(env->obimat, dxt);
mul_m3_v3(env->obimat, dyt);
}
}
else {
if (!BKE_scene_use_world_space_shading(R.scene)) {
// texvec is in view space
mul_mat3_m4_v3(R.viewinv, vec);
if (osatex) {
mul_mat3_m4_v3(R.viewinv, dxt);
mul_mat3_m4_v3(R.viewinv, dyt);
}
}
}
face = envcube_isect(env, vec, sco);
ibuf = env->cube[face];
if (osatex) {
set_dxtdyt(dxts, dyts, dxt, dyt, face);
imagewraposa(tex, NULL, ibuf, sco, dxts, dyts, texres, pool, skip_load_image);
/* edges? */
if (texres->ta < 1.0f) {
TexResult texr1, texr2;
texr1.nor = texr2.nor = NULL;
texr1.talpha = texr2.talpha = texres->talpha; /* boxclip expects this initialized */
add_v3_v3(vec, dxt);
face1 = envcube_isect(env, vec, sco);
sub_v3_v3(vec, dxt);
if (face != face1) {
ibuf = env->cube[face1];
set_dxtdyt(dxts, dyts, dxt, dyt, face1);
imagewraposa(tex, NULL, ibuf, sco, dxts, dyts, &texr1, pool, skip_load_image);
}
else texr1.tr = texr1.tg = texr1.tb = texr1.ta = 0.0;
/* here was the nasty bug! results were not zero-ed. FPE! */
add_v3_v3(vec, dyt);
face1 = envcube_isect(env, vec, sco);
sub_v3_v3(vec, dyt);
if (face != face1) {
ibuf = env->cube[face1];
set_dxtdyt(dxts, dyts, dxt, dyt, face1);
imagewraposa(tex, NULL, ibuf, sco, dxts, dyts, &texr2, pool, skip_load_image);
}
else texr2.tr = texr2.tg = texr2.tb = texr2.ta = 0.0;
fac = (texres->ta + texr1.ta + texr2.ta);
if (fac != 0.0f) {
fac = 1.0f / fac;
texres->tr = fac * (texres->ta * texres->tr + texr1.ta * texr1.tr + texr2.ta * texr2.tr);
texres->tg = fac * (texres->ta * texres->tg + texr1.ta * texr1.tg + texr2.ta * texr2.tg);
texres->tb = fac * (texres->ta * texres->tb + texr1.ta * texr1.tb + texr2.ta * texr2.tb);
}
texres->ta = 1.0;
}
}
else {
imagewrap(tex, NULL, ibuf, sco, texres, pool, skip_load_image);
}
return 1;
}
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