void TextureBaseOperation::executePixelSampled(float output[4], float x, float y, PixelSampler sampler)
{
TexResult texres = {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0, NULL};
float textureSize[4];
float textureOffset[4];
float vec[3];
int retval;
const float cx = this->getWidth() / 2;
const float cy = this->getHeight() / 2;
const float u = (x - cx) / this->getWidth() * 2;
const float v = (y - cy) / this->getHeight() * 2;
this->m_inputSize->readSampled(textureSize, x, y, sampler);
this->m_inputOffset->readSampled(textureOffset, x, y, sampler);
vec[0] = textureSize[0] * (u + textureOffset[0]);
vec[1] = textureSize[1] * (v + textureOffset[1]);
vec[2] = textureSize[2] * textureOffset[2];
retval = multitex_ext(this->m_texture, vec, NULL, NULL, 0, &texres, m_pool, m_sceneColorManage);
if (texres.talpha)
output[3] = texres.ta;
else
output[3] = texres.tin;
if ((retval & TEX_RGB)) {
output[0] = texres.tr;
output[1] = texres.tg;
output[2] = texres.tb;
}
else {
output[0] = output[1] = output[2] = output[3];
}
}
void TextureBaseOperation::executePixel(float *color, float x, float y, PixelSampler sampler)
{
TexResult texres = {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0, NULL};
float textureSize[4];
float textureOffset[4];
float vec[3];
int retval;
const float cx = this->getWidth() / 2;
const float cy = this->getHeight() / 2;
const float u = (cx - x) / this->getWidth() * 2;
const float v = (cy - y) / this->getHeight() * 2;
this->m_inputSize->read(textureSize, x, y, sampler);
this->m_inputOffset->read(textureOffset, x, y, sampler);
vec[0] = textureSize[0] * (u + textureOffset[0]);
vec[1] = textureSize[1] * (v + textureOffset[1]);
vec[2] = textureSize[2] * textureOffset[2];
retval = multitex_ext(this->m_texture, vec, NULL, NULL, 0, &texres);
if (texres.talpha)
color[3] = texres.ta;
else
color[3] = texres.tin;
if ((retval & TEX_RGB)) {
color[0] = texres.tr;
color[1] = texres.tg;
color[2] = texres.tb;
}
else color[0] = color[1] = color[2] = color[3];
}
void texture_evaluate(struct Tex *tex, float value[3], float color_r[3])
{
TexResult texres= {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0, NULL};
multitex_ext(tex, value, NULL, NULL, 1, &texres);
color_r[0] = texres.tr;
color_r[1] = texres.tg;
color_r[2] = texres.tb;
color_r[3] = texres.tin;
}
static void texture_evaluate(struct Tex *tex, float value[3], float color_r[4])
{
TexResult texres = {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0, NULL};
/* TODO(sergey): always use color management now. */
multitex_ext(tex, value, NULL, NULL, 1, &texres, NULL, true);
color_r[0] = texres.tr;
color_r[1] = texres.tg;
color_r[2] = texres.tb;
color_r[3] = texres.tin;
}
void TextureBaseOperation::executePixelSampled(float output[4],
float x,
float y,
PixelSampler sampler)
{
TexResult texres = {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0, NULL};
float textureSize[4];
float textureOffset[4];
float vec[3];
int retval;
const float cx = this->getWidth() / 2;
const float cy = this->getHeight() / 2;
float u = (x - cx) / this->getWidth() * 2;
float v = (y - cy) / this->getHeight() * 2;
/* When no interpolation/filtering happens in multitex() foce nearest interpolation.
* We do it here because (a) we can't easily say multitex() that we want nearest
* interpolation and (b) in such configuration multitex() sinply floor's the value
* which often produces artifacts.
*/
if (m_texture != NULL && (m_texture->imaflag & TEX_INTERPOL) == 0) {
u += 0.5f / cx;
v += 0.5f / cy;
}
this->m_inputSize->readSampled(textureSize, x, y, sampler);
this->m_inputOffset->readSampled(textureOffset, x, y, sampler);
vec[0] = textureSize[0] * (u + textureOffset[0]);
vec[1] = textureSize[1] * (v + textureOffset[1]);
vec[2] = textureSize[2] * textureOffset[2];
const int thread_id = WorkScheduler::current_thread_id();
retval = multitex_ext(
this->m_texture, vec, NULL, NULL, 0, &texres, thread_id, m_pool, m_sceneColorManage, false);
if (texres.talpha) {
output[3] = texres.ta;
}
else {
output[3] = texres.tin;
}
if ((retval & TEX_RGB)) {
output[0] = texres.tr;
output[1] = texres.tg;
output[2] = texres.tb;
}
else {
output[0] = output[1] = output[2] = output[3];
}
}
float paint_get_tex_pixel(Brush* br, float u, float v)
{
TexResult texres;
float co[3];
int hasrgb;
co[0] = u;
co[1] = v;
co[2] = 0;
memset(&texres, 0, sizeof(TexResult));
hasrgb = multitex_ext(br->mtex.tex, co, NULL, NULL, 0, &texres);
if (hasrgb & TEX_RGB)
texres.tin = (0.35f*texres.tr + 0.45f*texres.tg + 0.2f*texres.tb)*texres.ta;
return texres.tin;
}
/* TODO: should probably be unified with BrushPainter stuff? */
unsigned int *brush_gen_texture_cache(Brush *br, int half_side)
{
unsigned int *texcache = NULL;
MTex *mtex = &br->mtex;
TexResult texres= {0};
int hasrgb, ix, iy;
int side = half_side * 2;
if(mtex->tex) {
float x, y, step = 2.0 / side, co[3];
texcache = MEM_callocN(sizeof(int) * side * side, "Brush texture cache");
BKE_image_get_ibuf(mtex->tex->ima, NULL);
/*do normalized cannonical view coords for texture*/
for (y=-1.0, iy=0; iy<side; iy++, y += step) {
for (x=-1.0, ix=0; ix<side; ix++, x += step) {
co[0]= x;
co[1]= y;
co[2]= 0.0f;
/* This is copied from displace modifier code */
hasrgb = multitex_ext(mtex->tex, co, NULL, NULL, 0, &texres);
/* if the texture gave an RGB value, we assume it didn't give a valid
* intensity, so calculate one (formula from do_material_tex).
* if the texture didn't give an RGB value, copy the intensity across
*/
if(hasrgb & TEX_RGB)
texres.tin = (0.35f * texres.tr + 0.45f *
texres.tg + 0.2f * texres.tb);
texres.tin = texres.tin * 255.0f;
((char*)texcache)[(iy*side+ix)*4] = (char)texres.tin;
((char*)texcache)[(iy*side+ix)*4+1] = (char)texres.tin;
((char*)texcache)[(iy*side+ix)*4+2] = (char)texres.tin;
((char*)texcache)[(iy*side+ix)*4+3] = (char)texres.tin;
}
}
}
return texcache;
}
/* TODO: should probably be unified with BrushPainter stuff? */
unsigned int *BKE_brush_gen_texture_cache(Brush *br, int half_side, bool use_secondary)
{
unsigned int *texcache = NULL;
MTex *mtex = (use_secondary) ? &br->mask_mtex : &br->mtex;
TexResult texres = {0};
int hasrgb, ix, iy;
int side = half_side * 2;
if (mtex->tex) {
float x, y, step = 2.0 / side, co[3];
texcache = MEM_callocN(sizeof(int) * side * side, "Brush texture cache");
/* do normalized cannonical view coords for texture */
for (y = -1.0, iy = 0; iy < side; iy++, y += step) {
for (x = -1.0, ix = 0; ix < side; ix++, x += step) {
co[0] = x;
co[1] = y;
co[2] = 0.0f;
/* This is copied from displace modifier code */
/* TODO(sergey): brush are always cacheing with CM enabled for now. */
hasrgb = multitex_ext(mtex->tex, co, NULL, NULL, 0, &texres, NULL, true);
/* if the texture gave an RGB value, we assume it didn't give a valid
* intensity, so calculate one (formula from do_material_tex).
* if the texture didn't give an RGB value, copy the intensity across
*/
if (hasrgb & TEX_RGB)
texres.tin = rgb_to_grayscale(&texres.tr);
((char *)texcache)[(iy * side + ix) * 4] =
((char *)texcache)[(iy * side + ix) * 4 + 1] =
((char *)texcache)[(iy * side + ix) * 4 + 2] =
((char *)texcache)[(iy * side + ix) * 4 + 3] = (char)(texres.tin * 255.0f);
}
}
}
return texcache;
}
static void colorfn(float *out, TexParams *p, bNode *node, bNodeStack **in, short thread)
{
static float red[] = {1,0,0,1};
static float white[] = {1,1,1,1};
float *coord = p->coord;
Tex *nodetex = (Tex *)node->id;
if(node->custom2 || node->need_exec==0) {
/* this node refers to its own texture tree! */
QUATCOPY(
out,
(fabs(coord[0] - coord[1]) < .01) ? white : red
);
}
else if(nodetex) {
TexResult texres;
int textype;
float nor[] = {0,0,0};
float col1[4], col2[4];
tex_input_rgba(col1, in[0], p, thread);
tex_input_rgba(col2, in[1], p, thread);
texres.nor = nor;
textype = multitex_ext(nodetex, coord, 0, 0, 0, &texres);
if(textype & TEX_RGB) {
QUATCOPY(out, &texres.tr);
}
else {
QUATCOPY(out, col1);
ramp_blend(MA_RAMP_BLEND, out, out+1, out+2, texres.tin, col2);
}
}
}
static void do_texture_effector(EffectorCache *eff, EffectorData *efd, EffectedPoint *point, float *total_force)
{
TexResult result[4];
float tex_co[3], strength, force[3];
float nabla = eff->pd->tex_nabla;
int hasrgb;
short mode = eff->pd->tex_mode;
bool scene_color_manage;
if (!eff->pd->tex)
return;
result[0].nor = result[1].nor = result[2].nor = result[3].nor = NULL;
strength= eff->pd->f_strength * efd->falloff;
copy_v3_v3(tex_co, point->loc);
if (eff->pd->flag & PFIELD_TEX_2D) {
float fac=-dot_v3v3(tex_co, efd->nor);
madd_v3_v3fl(tex_co, efd->nor, fac);
}
if (eff->pd->flag & PFIELD_TEX_OBJECT) {
mul_m4_v3(eff->ob->imat, tex_co);
}
scene_color_manage = BKE_scene_check_color_management_enabled(eff->scene);
hasrgb = multitex_ext(eff->pd->tex, tex_co, NULL, NULL, 0, result, NULL, scene_color_manage, false);
if (hasrgb && mode==PFIELD_TEX_RGB) {
force[0] = (0.5f - result->tr) * strength;
force[1] = (0.5f - result->tg) * strength;
force[2] = (0.5f - result->tb) * strength;
}
else {
strength/=nabla;
tex_co[0] += nabla;
multitex_ext(eff->pd->tex, tex_co, NULL, NULL, 0, result+1, NULL, scene_color_manage, false);
tex_co[0] -= nabla;
tex_co[1] += nabla;
multitex_ext(eff->pd->tex, tex_co, NULL, NULL, 0, result+2, NULL, scene_color_manage, false);
tex_co[1] -= nabla;
tex_co[2] += nabla;
multitex_ext(eff->pd->tex, tex_co, NULL, NULL, 0, result+3, NULL, scene_color_manage, false);
if (mode == PFIELD_TEX_GRAD || !hasrgb) { /* if we don't have rgb fall back to grad */
/* generate intensity if texture only has rgb value */
if (hasrgb & TEX_RGB) {
int i;
for (i=0; i<4; i++)
result[i].tin = (1.0f / 3.0f) * (result[i].tr + result[i].tg + result[i].tb);
}
force[0] = (result[0].tin - result[1].tin) * strength;
force[1] = (result[0].tin - result[2].tin) * strength;
force[2] = (result[0].tin - result[3].tin) * strength;
}
else { /*PFIELD_TEX_CURL*/
float dbdy, dgdz, drdz, dbdx, dgdx, drdy;
dbdy = result[2].tb - result[0].tb;
dgdz = result[3].tg - result[0].tg;
drdz = result[3].tr - result[0].tr;
dbdx = result[1].tb - result[0].tb;
dgdx = result[1].tg - result[0].tg;
drdy = result[2].tr - result[0].tr;
force[0] = (dbdy - dgdz) * strength;
force[1] = (drdz - dbdx) * strength;
force[2] = (dgdx - drdy) * strength;
}
}
if (eff->pd->flag & PFIELD_TEX_2D) {
float fac = -dot_v3v3(force, efd->nor);
madd_v3_v3fl(force, efd->nor, fac);
}
add_v3_v3(total_force, force);
}
static void do_texture_effector(EffectorCache *eff, EffectorData *efd, EffectedPoint *point, float *total_force)
{
TexResult result[4];
float tex_co[3], strength, force[3];
float nabla = eff->pd->tex_nabla;
int hasrgb;
short mode = eff->pd->tex_mode;
if(!eff->pd->tex)
return;
result[0].nor = result[1].nor = result[2].nor = result[3].nor = NULL;
strength= eff->pd->f_strength * efd->falloff;
copy_v3_v3(tex_co,point->loc);
if(eff->pd->flag & PFIELD_TEX_2D) {
float fac=-dot_v3v3(tex_co, efd->nor);
VECADDFAC(tex_co, tex_co, efd->nor, fac);
}
if(eff->pd->flag & PFIELD_TEX_OBJECT) {
mul_m4_v3(eff->ob->imat, tex_co);
}
hasrgb = multitex_ext(eff->pd->tex, tex_co, NULL,NULL, 0, result);
if(hasrgb && mode==PFIELD_TEX_RGB) {
force[0] = (0.5f - result->tr) * strength;
force[1] = (0.5f - result->tg) * strength;
force[2] = (0.5f - result->tb) * strength;
}
else {
strength/=nabla;
tex_co[0] += nabla;
multitex_ext(eff->pd->tex, tex_co, NULL, NULL, 0, result+1);
tex_co[0] -= nabla;
tex_co[1] += nabla;
multitex_ext(eff->pd->tex, tex_co, NULL, NULL, 0, result+2);
tex_co[1] -= nabla;
tex_co[2] += nabla;
multitex_ext(eff->pd->tex, tex_co, NULL, NULL, 0, result+3);
if(mode == PFIELD_TEX_GRAD || !hasrgb) { /* if we dont have rgb fall back to grad */
force[0] = (result[0].tin - result[1].tin) * strength;
force[1] = (result[0].tin - result[2].tin) * strength;
force[2] = (result[0].tin - result[3].tin) * strength;
}
else { /*PFIELD_TEX_CURL*/
float dbdy, dgdz, drdz, dbdx, dgdx, drdy;
dbdy = result[2].tb - result[0].tb;
dgdz = result[3].tg - result[0].tg;
drdz = result[3].tr - result[0].tr;
dbdx = result[1].tb - result[0].tb;
dgdx = result[1].tg - result[0].tg;
drdy = result[2].tr - result[0].tr;
force[0] = (dbdy - dgdz) * strength;
force[1] = (drdz - dbdx) * strength;
force[2] = (dgdx - drdy) * strength;
}
}
if(eff->pd->flag & PFIELD_TEX_2D){
float fac = -dot_v3v3(force, efd->nor);
VECADDFAC(force, force, efd->nor, fac);
}
add_v3_v3(total_force, force);
}