node_shader_mapping.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): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "node_shader_util.h"

/* **************** MAPPING  ******************** */
static bNodeSocketTemplate sh_node_mapping_in[]= {
    {   SOCK_VECTOR, 1, "Vector",   0.0f, 0.0f, 0.0f, 1.0f, -1.0f, 1.0f, PROP_NONE},
    {   -1, 0, ""   }
};

static bNodeSocketTemplate sh_node_mapping_out[]= {
    {   SOCK_VECTOR, 0, "Vector"},
    {   -1, 0, ""   }
};

/* do the regular mapping options for blender textures */
static void node_shader_exec_mapping(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
{
    TexMapping *texmap= node->storage;
    float *vec= out[0]->vec;
    
    /* stack order input:  vector */
    /* stack order output: vector */
    nodestack_get_vec(vec, SOCK_VECTOR, in[0]);
    mul_m4_v3(texmap->mat, vec);
    
    if(texmap->flag & TEXMAP_CLIP_MIN) {
        if(vec[0]<texmap->min[0]) vec[0]= texmap->min[0];
        if(vec[1]<texmap->min[1]) vec[1]= texmap->min[1];
        if(vec[2]<texmap->min[2]) vec[2]= texmap->min[2];
    }
    if(texmap->flag & TEXMAP_CLIP_MAX) {
        if(vec[0]>texmap->max[0]) vec[0]= texmap->max[0];
        if(vec[1]>texmap->max[1]) vec[1]= texmap->max[1];
        if(vec[2]>texmap->max[2]) vec[2]= texmap->max[2];
    }
}


static void node_shader_init_mapping(bNodeTree *UNUSED(ntree), bNode* node, bNodeTemplate *UNUSED(ntemp))
{
    node->storage= add_tex_mapping();
}

static int gpu_shader_mapping(GPUMaterial *mat, bNode *node, GPUNodeStack *in, GPUNodeStack *out)
{
    TexMapping *texmap= node->storage;
    float domin= (texmap->flag & TEXMAP_CLIP_MIN) != 0;
    float domax= (texmap->flag & TEXMAP_CLIP_MAX) != 0;
    GPUNodeLink *tmat = GPU_uniform((float*)texmap->mat);
    GPUNodeLink *tmin = GPU_uniform(texmap->min);
    GPUNodeLink *tmax = GPU_uniform(texmap->max);
    GPUNodeLink *tdomin = GPU_uniform(&domin);
    GPUNodeLink *tdomax = GPU_uniform(&domax);

    return GPU_stack_link(mat, "mapping", in, out, tmat, tmin, tmax, tdomin, tdomax);
}

void register_node_type_sh_mapping(bNodeTreeType *ttype)
{
    static bNodeType ntype;
    
    node_type_base(ttype, &ntype, SH_NODE_MAPPING, "Mapping", NODE_CLASS_OP_VECTOR, NODE_OPTIONS);
    node_type_compatibility(&ntype, NODE_OLD_SHADING|NODE_NEW_SHADING);
    node_type_socket_templates(&ntype, sh_node_mapping_in, sh_node_mapping_out);
    node_type_size(&ntype, 240, 160, 320);
    node_type_init(&ntype, node_shader_init_mapping);
    node_type_storage(&ntype, "TexMapping", node_free_standard_storage, node_copy_standard_storage);
    node_type_exec(&ntype, node_shader_exec_mapping);
    node_type_gpu(&ntype, gpu_shader_mapping);
    
    nodeRegisterType(ttype, &ntype);
}