290 lines
6.4 KiB
C
290 lines
6.4 KiB
C
/**
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*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The Original Code is Copyright (C) 2005 Blender Foundation.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/*
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HOW TEXTURE NODES WORK
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In contrast to Shader nodes, which place a colour into the output
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stack when executed, Texture nodes place a TexDelegate* there. To
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obtain a colour value from this, a node further up the chain reads
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the TexDelegate* from its input stack, and uses tex_call_delegate to
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retrieve the colour from the delegate.
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comments: (ton)
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This system needs recode, a node system should rely on the stack, and
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callbacks for nodes only should evaluate own node, not recursively go
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over other previous ones.
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*/
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#include <assert.h>
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#include "TEX_util.h"
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#define PREV_RES 128 /* default preview resolution */
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int preview_flag = 0;
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void tex_call_delegate(TexDelegate *dg, float *out, TexParams *params, short thread)
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{
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if(dg->node->need_exec)
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dg->fn(out, params, dg->node, dg->in, thread);
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}
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void tex_input(float *out, int sz, bNodeStack *in, TexParams *params, short thread)
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{
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TexDelegate *dg = in->data;
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if(dg) {
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tex_call_delegate(dg, in->vec, params, thread);
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if(in->hasoutput && in->sockettype == SOCK_VALUE)
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in->vec[1] = in->vec[2] = in->vec[0];
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}
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memcpy(out, in->vec, sz * sizeof(float));
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}
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void tex_input_vec(float *out, bNodeStack *in, TexParams *params, short thread)
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{
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tex_input(out, 3, in, params, thread);
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}
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void tex_input_rgba(float *out, bNodeStack *in, TexParams *params, short thread)
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{
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tex_input(out, 4, in, params, thread);
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if(in->hasoutput && in->sockettype == SOCK_VALUE)
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{
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out[1] = out[2] = out[0];
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out[3] = 1;
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}
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if(in->hasoutput && in->sockettype == SOCK_VECTOR) {
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out[0] = out[0] * .5f + .5f;
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out[1] = out[1] * .5f + .5f;
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out[2] = out[2] * .5f + .5f;
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out[3] = 1;
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}
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}
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float tex_input_value(bNodeStack *in, TexParams *params, short thread)
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{
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float out[4];
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tex_input_vec(out, in, params, thread);
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return out[0];
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}
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static void init_preview(bNode *node)
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{
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int xsize = (int)(node->prvr.xmax - node->prvr.xmin);
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int ysize = (int)(node->prvr.ymax - node->prvr.ymin);
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if(xsize == 0) {
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xsize = PREV_RES;
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ysize = PREV_RES;
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}
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if(node->preview==NULL)
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node->preview= MEM_callocN(sizeof(bNodePreview), "node preview");
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if(node->preview->rect==NULL) {
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node->preview->rect= MEM_callocN(4*xsize + xsize*ysize*sizeof(float)*4, "node preview rect");
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node->preview->xsize= xsize;
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node->preview->ysize= ysize;
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}
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}
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void params_from_cdata(TexParams *out, TexCallData *in)
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{
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out->coord = in->coord;
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out->dxt = in->dxt;
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out->dyt = in->dyt;
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out->cfra = in->cfra;
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}
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void tex_do_preview(bNode *node, bNodeStack *ns, TexCallData *cdata)
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{
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int x, y;
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float *result;
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bNodePreview *preview;
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float coord[3] = {0, 0, 0};
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TexParams params;
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int resolution;
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int xsize, ysize;
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if(!cdata->do_preview)
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return;
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if(!(node->typeinfo->flag & NODE_PREVIEW))
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return;
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init_preview(node);
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preview = node->preview;
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xsize = preview->xsize;
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ysize = preview->ysize;
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params.dxt = 0;
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params.dyt = 0;
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params.cfra = cdata->cfra;
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params.coord = coord;
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resolution = (xsize < ysize) ? xsize : ysize;
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for(x=0; x<xsize; x++)
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for(y=0; y<ysize; y++)
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{
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params.coord[0] = ((float) x / resolution) * 2 - 1;
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params.coord[1] = ((float) y / resolution) * 2 - 1;
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result = preview->rect + 4 * (xsize*y + x);
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tex_input_rgba(result, ns, ¶ms, cdata->thread);
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}
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}
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void tex_output(bNode *node, bNodeStack **in, bNodeStack *out, TexFn texfn)
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{
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TexDelegate *dg;
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if(!out->data)
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/* Freed in tex_end_exec (node.c) */
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dg = out->data = MEM_mallocN(sizeof(TexDelegate), "tex delegate");
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else
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dg = out->data;
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dg->fn = texfn;
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dg->node = node;
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memcpy(dg->in, in, MAX_SOCKET * sizeof(bNodeStack*));
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dg->type = out->sockettype;
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}
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void ntreeTexCheckCyclics(struct bNodeTree *ntree)
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{
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bNode *node;
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for(node= ntree->nodes.first; node; node= node->next) {
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if(node->type == TEX_NODE_TEXTURE && node->id)
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{
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/* custom2 stops the node from rendering */
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if(node->custom1) {
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node->custom2 = 1;
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node->custom1 = 0;
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} else {
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Tex *tex = (Tex *)node->id;
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node->custom2 = 0;
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node->custom1 = 1;
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if(tex->use_nodes && tex->nodetree) {
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ntreeTexCheckCyclics(tex->nodetree);
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}
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node->custom1 = 0;
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}
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}
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}
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}
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void ntreeTexExecTree(
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bNodeTree *nodes,
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TexResult *texres,
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float *coord,
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float *dxt, float *dyt,
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short thread,
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Tex *tex,
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short which_output,
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int cfra
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){
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TexResult dummy_texres;
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TexCallData data;
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/* 0 means don't care, so just use first */
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if(which_output == 0)
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which_output = 1;
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if(!texres) texres = &dummy_texres;
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data.coord = coord;
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data.dxt = dxt;
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data.dyt = dyt;
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data.target = texres;
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data.do_preview = preview_flag;
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data.thread = thread;
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data.which_output = which_output;
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data.cfra= cfra;
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preview_flag = 0;
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ntreeExecTree(nodes, &data, thread);
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}
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void ntreeTexSetPreviewFlag(int doit)
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{
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preview_flag = doit;
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}
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char* ntreeTexOutputMenu(bNodeTree *ntree)
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{
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bNode *node;
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int len = 1;
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char *str;
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char ctrl[4];
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int index = 0;
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for(node= ntree->nodes.first; node; node= node->next)
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if(node->type == TEX_NODE_OUTPUT) {
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len += strlen(
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((TexNodeOutput*)node->storage)->name
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) + strlen(" %xNNN|");
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index ++;
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if(node->custom1 > 999) {
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printf("Error: too many outputs");
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break;
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}
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}
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str = malloc(len * sizeof(char));
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*str = 0;
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for(node= ntree->nodes.first; node; node= node->next)
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if(node->type == TEX_NODE_OUTPUT) {
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strcat(str, ((TexNodeOutput*)node->storage)->name);
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strcat(str, " %x");
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sprintf(ctrl, "%d", node->custom1);
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strcat(str, ctrl);
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if(--index)
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strcat(str, "|");
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else
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break;
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}
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return str;
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}
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