/**
 * $Id: SHD_output.c 32517 2010-10-16 14:32:17Z campbellbarton $
 *
 * ***** 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"
#include "SHD_noise.h"

static float noise_texture_value(float vec[3])
{
	float p[3];

	mul_v3_v3fl(p, vec, 1e8f);
	return cellnoise(p);
}

static void noise_texture_color(float rgb[3], float vec[3])
{
	float p[3];

	mul_v3_v3fl(p, vec, 1e8f);
 	cellnoise_color(rgb, p);
}

/* **************** NOISE ******************** */

static bNodeSocketType sh_node_tex_noise_in[]= {
	{	SOCK_VECTOR, 1, "Vector",		0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, SOCK_NO_VALUE},
	{	-1, 0, ""	}
};

static bNodeSocketType sh_node_tex_noise_out[]= {
	{	SOCK_RGBA, 0, "Color",		0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
	{	SOCK_VALUE, 0, "Fac",		0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
	{	-1, 0, ""	}
};

static void node_shader_exec_tex_noise(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
{
	ShaderCallData *scd= (ShaderCallData*)data;
	bNodeSocket *vecsock = node->inputs.first;
	float vec[3];
	
	if(vecsock->link)
		nodestack_get_vec(vec, SOCK_VECTOR, in[0]);
	else
		copy_v3_v3(vec, scd->co);

	noise_texture_color(out[0]->vec, vec);
	out[1]->vec[0]= noise_texture_value(vec);
}

static int node_shader_gpu_tex_noise(GPUMaterial *mat, bNode *UNUSED(node), GPUNodeStack *in, GPUNodeStack *out)
{
	if(!in[0].link)
		in[0].link = GPU_attribute(CD_ORCO, "");

	return GPU_stack_link(mat, "node_tex_noise", in, out);
}

/* node type definition */
void register_node_type_sh_tex_noise(ListBase *lb)
{
	static bNodeType ntype;

	node_type_base(&ntype, SH_NODE_TEX_NOISE, "Noise Texture", NODE_CLASS_TEXTURE, 0,
		sh_node_tex_noise_in, sh_node_tex_noise_out);
	node_type_size(&ntype, 150, 60, 200);
	node_type_init(&ntype, NULL);
	node_type_storage(&ntype, "", NULL, NULL);
	node_type_exec(&ntype, node_shader_exec_tex_noise);
	node_type_gpu(&ntype, node_shader_gpu_tex_noise);

	nodeRegisterType(lb, &ntype);
};

