diff options
Diffstat (limited to 'source/blender/nodes/texture/node_texture_util.c')
| -rw-r--r-- | source/blender/nodes/texture/node_texture_util.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/source/blender/nodes/texture/node_texture_util.c b/source/blender/nodes/texture/node_texture_util.c new file mode 100644 index 00000000000..7b8f42aa925 --- /dev/null +++ b/source/blender/nodes/texture/node_texture_util.c @@ -0,0 +1,173 @@ +/* + * $Id$ + * + * ***** 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * The Original Code is Copyright (C) 2005 Blender Foundation. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): none yet. + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file blender/nodes/texture/node_texture_util.c + * \ingroup nodes + */ + + +/* + HOW TEXTURE NODES WORK + + In contrast to Shader nodes, which place a color into the output + stack when executed, Texture nodes place a TexDelegate* there. To + obtain a color value from this, a node further up the chain reads + the TexDelegate* from its input stack, and uses tex_call_delegate to + retrieve the color from the delegate. + + comments: (ton) + + This system needs recode, a node system should rely on the stack, and + callbacks for nodes only should evaluate own node, not recursively go + over other previous ones. +*/ + +#include <assert.h> +#include "node_texture_util.h" + +#define PREV_RES 128 /* default preview resolution */ + +static void tex_call_delegate(TexDelegate *dg, float *out, TexParams *params, short thread) +{ + if(dg->node->need_exec) { + dg->fn(out, params, dg->node, dg->in, thread); + + if(dg->cdata->do_preview) + tex_do_preview(dg->node, params->previewco, out); + } +} + +static void tex_input(float *out, int sz, bNodeStack *in, TexParams *params, short thread) +{ + TexDelegate *dg = in->data; + if(dg) { + tex_call_delegate(dg, in->vec, params, thread); + + if(in->hasoutput && in->sockettype == SOCK_FLOAT) + in->vec[1] = in->vec[2] = in->vec[0]; + } + memcpy(out, in->vec, sz * sizeof(float)); +} + +void tex_input_vec(float *out, bNodeStack *in, TexParams *params, short thread) +{ + tex_input(out, 3, in, params, thread); +} + +void tex_input_rgba(float *out, bNodeStack *in, TexParams *params, short thread) +{ + tex_input(out, 4, in, params, thread); + + if(in->hasoutput && in->sockettype == SOCK_FLOAT) + { + out[1] = out[2] = out[0]; + out[3] = 1; + } + + if(in->hasoutput && in->sockettype == SOCK_VECTOR) { + out[0] = out[0] * .5f + .5f; + out[1] = out[1] * .5f + .5f; + out[2] = out[2] * .5f + .5f; + out[3] = 1; + } +} + +float tex_input_value(bNodeStack *in, TexParams *params, short thread) +{ + float out[4]; + tex_input_vec(out, in, params, thread); + return out[0]; +} + +void params_from_cdata(TexParams *out, TexCallData *in) +{ + out->co = in->co; + out->dxt = in->dxt; + out->dyt = in->dyt; + out->previewco = in->co; + out->osatex = in->osatex; + out->cfra = in->cfra; + out->shi = in->shi; + out->mtex = in->mtex; +} + +void tex_do_preview(bNode *node, float *co, float *col) +{ + bNodePreview *preview= node->preview; + + if(preview) { + int xs= ((co[0] + 1.0f)*0.5f)*preview->xsize; + int ys= ((co[1] + 1.0f)*0.5f)*preview->ysize; + + nodeAddToPreview(node, col, xs, ys, 0); /* 0 = no color management */ + } +} + +void tex_output(bNode *node, bNodeStack **in, bNodeStack *out, TexFn texfn, TexCallData *cdata) +{ + TexDelegate *dg; + if(!out->data) + /* Freed in tex_end_exec (node.c) */ + dg = out->data = MEM_mallocN(sizeof(TexDelegate), "tex delegate"); + else + dg = out->data; + + dg->cdata= cdata; + dg->fn = texfn; + dg->node = node; + memcpy(dg->in, in, MAX_SOCKET * sizeof(bNodeStack*)); + dg->type = out->sockettype; +} + +void ntreeTexCheckCyclics(struct bNodeTree *ntree) +{ + bNode *node; + for(node= ntree->nodes.first; node; node= node->next) { + + if(node->type == TEX_NODE_TEXTURE && node->id) + { + /* custom2 stops the node from rendering */ + if(node->custom1) { + node->custom2 = 1; + node->custom1 = 0; + } else { + Tex *tex = (Tex *)node->id; + + node->custom2 = 0; + + node->custom1 = 1; + if(tex->use_nodes && tex->nodetree) { + ntreeTexCheckCyclics(tex->nodetree); + } + node->custom1 = 0; + } + } + + } +} |