node_composite_normal.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) 2006 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "node_composite_util.h"


/* **************** NORMAL  ******************** */
static bNodeSocketTemplate cmp_node_normal_in[]= {
    {   SOCK_VECTOR, 1, "Normal",   0.0f, 0.0f, 0.0f, 1.0f, -1.0f, 1.0f, PROP_DIRECTION},
    {   -1, 0, ""   }
};

static bNodeSocketTemplate cmp_node_normal_out[]= {
    {   SOCK_VECTOR, 0, "Normal"},
    {   SOCK_FLOAT, 0, "Dot"},
    {   -1, 0, ""   }
};

static void do_normal(bNode *node, float *out, float *in)
{
    bNodeSocket *sock= node->outputs.first;
    float *nor= ((bNodeSocketValueVector*)sock->default_value)->value;
    
    /* render normals point inside... the widget points outside */
    out[0]= -INPR(nor, in);
}

/* generates normal, does dot product */
static void node_composit_exec_normal(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
{
    bNodeSocket *sock= node->outputs.first;
    float *nor= ((bNodeSocketValueVector*)sock->default_value)->value;
    /* stack order input:  normal */
    /* stack order output: normal, value */
    
    /* input no image? then only vector op */
    if(in[0]->data==NULL) {
        copy_v3_v3(out[0]->vec, nor);
        /* render normals point inside... the widget points outside */
        out[1]->vec[0]= -dot_v3v3(out[0]->vec, in[0]->vec);
    }
    else if(out[1]->hasoutput) {
        /* make output size of input image */
        CompBuf *cbuf= in[0]->data;
        CompBuf *stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_VAL, 1); /* allocs */
        
        composit1_pixel_processor(node, stackbuf, in[0]->data, in[0]->vec, do_normal, CB_VEC3);
        
        out[1]->data= stackbuf;
    }
    
    
}

static void init(bNodeTree *UNUSED(ntree), bNode *node, bNodeTemplate *UNUSED(ntemp))
{
    bNodeSocket *sock= node->outputs.first;
    float *nor= ((bNodeSocketValueVector*)sock->default_value)->value;
    
    nor[0] = 0.0f;
    nor[1] = 0.0f;
    nor[2] = 1.0f;
}

void register_node_type_cmp_normal(bNodeTreeType *ttype)
{
    static bNodeType ntype;

    node_type_base(ttype, &ntype, CMP_NODE_NORMAL, "Normal", NODE_CLASS_OP_VECTOR, NODE_OPTIONS);
    node_type_socket_templates(&ntype, cmp_node_normal_in, cmp_node_normal_out);
    node_type_init(&ntype, init);
    node_type_size(&ntype, 100, 60, 200);
    node_type_exec(&ntype, node_composit_exec_normal);

    nodeRegisterType(ttype, &ntype);
}