SHD_vectMath.c

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/*
 * $Id: SHD_vectMath.c 35237 2011-02-27 20:13:22Z jesterking $
 *
 * ***** 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 *****
 */

#include "../SHD_util.h"


/* **************** VECTOR MATH ******************** */ 
static bNodeSocketType sh_node_vect_math_in[]= { 
        { SOCK_VECTOR, 1, "Vector", 0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 1.0f}, 
        { SOCK_VECTOR, 1, "Vector", 0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 1.0f}, 
        { -1, 0, "" } 
};

static bNodeSocketType sh_node_vect_math_out[]= {
        { SOCK_VECTOR, 0, "Vector", 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f}, 
        { SOCK_VALUE, 0, "Value", 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
        { -1, 0, "" } 
};

static void node_shader_exec_vect_math(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out) 
{ 
        float vec1[3], vec2[3];
        
        nodestack_get_vec(vec1, SOCK_VECTOR, in[0]);
        nodestack_get_vec(vec2, SOCK_VECTOR, in[1]);
        
        if(node->custom1 == 0) {        /* Add */
                out[0]->vec[0]= vec1[0] + vec2[0];
                out[0]->vec[1]= vec1[1] + vec2[1];
                out[0]->vec[2]= vec1[2] + vec2[2];
                
                out[1]->vec[0]= (fabs(out[0]->vec[0]) + fabs(out[0]->vec[0]) + fabs(out[0]->vec[0])) / 3;
        }
        else if(node->custom1 == 1) {   /* Subtract */
                out[0]->vec[0]= vec1[0] - vec2[0];
                out[0]->vec[1]= vec1[1] - vec2[1];
                out[0]->vec[2]= vec1[2] - vec2[2];
                
                out[1]->vec[0]= (fabs(out[0]->vec[0]) + fabs(out[0]->vec[0]) + fabs(out[0]->vec[0])) / 3;
        }
        else if(node->custom1 == 2) {   /* Average */
                out[0]->vec[0]= vec1[0] + vec2[0];
                out[0]->vec[1]= vec1[1] + vec2[1];
                out[0]->vec[2]= vec1[2] + vec2[2];
                
                out[1]->vec[0] = normalize_v3( out[0]->vec );
        }
        else if(node->custom1 == 3) {   /* Dot product */
                out[1]->vec[0]= (vec1[0] * vec2[0]) + (vec1[1] * vec2[1]) + (vec1[2] * vec2[2]);
        }
        else if(node->custom1 == 4) {   /* Cross product */
                out[0]->vec[0]= (vec1[1] * vec2[2]) - (vec1[2] * vec2[1]);
                out[0]->vec[1]= (vec1[2] * vec2[0]) - (vec1[0] * vec2[2]);
                out[0]->vec[2]= (vec1[0] * vec2[1]) - (vec1[1] * vec2[0]);
                
                out[1]->vec[0] = normalize_v3( out[0]->vec );
        }
        else if(node->custom1 == 5) {   /* Normalize */
                if(in[0]->hasinput || !in[1]->hasinput) {       /* This one only takes one input, so we've got to choose. */
                        out[0]->vec[0]= vec1[0];
                        out[0]->vec[1]= vec1[1];
                        out[0]->vec[2]= vec1[2];
                }
                else {
                        out[0]->vec[0]= vec2[0];
                        out[0]->vec[1]= vec2[1];
                        out[0]->vec[2]= vec2[2];
                }
                
                out[1]->vec[0] = normalize_v3( out[0]->vec );
        }
        
}

static int gpu_shader_vect_math(GPUMaterial *mat, bNode *node, GPUNodeStack *in, GPUNodeStack *out)
{
        static const char *names[] = {"vec_math_add", "vec_math_sub",
                "vec_math_average", "vec_math_dot", "vec_math_cross",
                "vec_math_normalize"};

        switch (node->custom1) {
                case 0:
                case 1:
                case 2:
                case 3:
                case 4:
                        GPU_stack_link(mat, names[node->custom1], NULL, out,
                                GPU_socket(&in[0]), GPU_socket(&in[1]));
                        break;
                case 5:
                        if(in[0].hasinput || !in[1].hasinput)
                                GPU_stack_link(mat, names[node->custom1], NULL, out, GPU_socket(&in[0]));
                        else
                                GPU_stack_link(mat, names[node->custom1], NULL, out, GPU_socket(&in[1]));
                        break;
                default:
                        return 0;
        }
        
        return 1;
}

void register_node_type_sh_vect_math(ListBase *lb)
{
        static bNodeType ntype;

        node_type_base(&ntype, SH_NODE_VECT_MATH, "Vector Math", NODE_CLASS_CONVERTOR, NODE_OPTIONS,
                sh_node_vect_math_in, sh_node_vect_math_out);
        node_type_size(&ntype, 80, 75, 140);
        node_type_label(&ntype, node_vect_math_label);
        node_type_storage(&ntype, "node_vect_math", NULL, NULL);
        node_type_exec(&ntype, node_shader_exec_vect_math);
        node_type_gpu(&ntype, gpu_shader_vect_math);

        nodeRegisterType(lb, &ntype);
}