1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/*
* ***** 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"
int tex_node_poll_default(bNodeType *UNUSED(ntype), bNodeTree *ntree)
{
return STREQ(ntree->idname, "TextureNodeTree");
}
void tex_node_type_base(struct bNodeType *ntype, int type, const char *name, short nclass, short flag)
{
node_type_base(ntype, type, name, nclass, flag);
ntype->poll = tex_node_poll_default;
ntype->update_internal_links = node_update_internal_links_default;
}
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->preview, params->previewco, out, dg->cdata->do_manage);
}
}
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] * 0.5f + 0.5f;
out[1] = out[1] * 0.5f + 0.5f;
out[2] = out[2] * 0.5f + 0.5f;
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(bNodePreview *preview, const float coord[2], const float col[4], bool do_manage)
{
if (preview) {
int xs = ((coord[0] + 1.0f) * 0.5f) * preview->xsize;
int ys = ((coord[1] + 1.0f) * 0.5f) * preview->ysize;
BKE_node_preview_set_pixel(preview, col, xs, ys, do_manage);
}
}
void tex_output(bNode *node, bNodeExecData *execdata, 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;
dg->preview = execdata->preview;
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;
}
}
}
}
|