node_texture_valToNor.c

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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) 2005 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): Jucas.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "node_texture_util.h"
#include "NOD_texture.h"

static bNodeSocketTemplate inputs[]= { 
    { SOCK_FLOAT, 1, "Val",   0.0f,   0.0f, 0.0f, 1.0f,  0.0f,   1.0f, PROP_NONE },
    { SOCK_FLOAT, 1, "Nabla", 0.025f, 0.0f, 0.0f, 0.0f,  0.001f, 0.1f, PROP_UNSIGNED },
    { -1, 0, "" } 
};

static bNodeSocketTemplate outputs[]= { 
    { SOCK_VECTOR, 0, "Normal" }, 
    { -1, 0, "" } 
};

static void normalfn(float *out, TexParams *p, bNode *UNUSED(node), bNodeStack **in, short thread)
{
    float new_co[3];
    float *co = p->co;

    float nabla = tex_input_value(in[1], p, thread);    
    float val;
    float nor[3];
    
    TexParams np = *p;
    np.co = new_co;

    val = tex_input_value(in[0], p, thread);

    new_co[0] = co[0] + nabla;
    new_co[1] = co[1];
    new_co[2] = co[2];
    nor[0] = tex_input_value(in[0], &np, thread);

    new_co[0] = co[0];
    new_co[1] = co[1] + nabla;
    nor[1] = tex_input_value(in[0], &np, thread);
    
    new_co[1] = co[1];
    new_co[2] = co[2] + nabla;
    nor[2] = tex_input_value(in[0], &np, thread);

    out[0] = val-nor[0];
    out[1] = val-nor[1];
    out[2] = val-nor[2];
}
static void exec(void *data, bNode *node, bNodeStack **in, bNodeStack **out) 
{
    tex_output(node, in, out[0], &normalfn, data);
}

void register_node_type_tex_valtonor(bNodeTreeType *ttype)
{
    static bNodeType ntype;
    
    node_type_base(ttype, &ntype, TEX_NODE_VALTONOR, "Value to Normal", NODE_CLASS_CONVERTOR, NODE_OPTIONS);
    node_type_socket_templates(&ntype, inputs, outputs);
    node_type_size(&ntype, 90, 80, 100);
    node_type_exec(&ntype, exec);
    
    nodeRegisterType(ttype, &ntype);
}