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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): Robin Allen
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/nodes/intern/TEX_nodes/TEX_math.c
* \ingroup texnodes
*/
#include "../TEX_util.h"
#include "TEX_node.h"
/* **************** SCALAR MATH ******************** */
static bNodeSocketType inputs[]= {
{ SOCK_VALUE, 1, "Value", 0.5f, 0.5f, 0.5f, 1.0f, -100.0f, 100.0f},
{ SOCK_VALUE, 1, "Value", 0.5f, 0.5f, 0.5f, 1.0f, -100.0f, 100.0f},
{ -1, 0, "" }
};
static bNodeSocketType outputs[]= {
{ SOCK_VALUE, 0, "Value", 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
{ -1, 0, "" }
};
static void valuefn(float *out, TexParams *p, bNode *node, bNodeStack **in, short thread)
{
float in0 = tex_input_value(in[0], p, thread);
float in1 = tex_input_value(in[1], p, thread);
switch(node->custom1){
case 0: /* Add */
*out= in0 + in1;
break;
case 1: /* Subtract */
*out= in0 - in1;
break;
case 2: /* Multiply */
*out= in0 * in1;
break;
case 3: /* Divide */
{
if(in1==0) /* We don't want to divide by zero. */
*out= 0.0;
else
*out= in0 / in1;
}
break;
case 4: /* Sine */
{
*out= sin(in0);
}
break;
case 5: /* Cosine */
{
*out= cos(in0);
}
break;
case 6: /* Tangent */
{
*out= tan(in0);
}
break;
case 7: /* Arc-Sine */
{
/* Can't do the impossible... */
if( in0 <= 1 && in0 >= -1 )
*out= asin(in0);
else
*out= 0.0;
}
break;
case 8: /* Arc-Cosine */
{
/* Can't do the impossible... */
if( in0 <= 1 && in0 >= -1 )
*out= acos(in0);
else
*out= 0.0;
}
break;
case 9: /* Arc-Tangent */
{
*out= atan(in0);
}
break;
case 10: /* Power */
{
/* Only raise negative numbers by full integers */
if( in0 >= 0 ) {
out[0]= pow(in0, in1);
} else {
float y_mod_1 = fmod(in1, 1);
if (y_mod_1 > 0.999f || y_mod_1 < 0.001f) {
*out = pow(in0, floor(in1 + 0.5f));
} else {
*out = 0.0;
}
}
}
break;
case 11: /* Logarithm */
{
/* Don't want any imaginary numbers... */
if( in0 > 0 && in1 > 0 )
*out= log(in0) / log(in1);
else
*out= 0.0;
}
break;
case 12: /* Minimum */
{
if( in0 < in1 )
*out= in0;
else
*out= in1;
}
break;
case 13: /* Maximum */
{
if( in0 > in1 )
*out= in0;
else
*out= in1;
}
break;
case 14: /* Round */
{
*out= (in0<0)?(int)(in0 - 0.5f):(int)(in0 + 0.5f);
}
break;
case 15: /* Less Than */
{
if( in0 < in1 )
*out= 1.0f;
else
*out= 0.0f;
}
break;
case 16: /* Greater Than */
{
if( in0 > in1 )
*out= 1.0f;
else
*out= 0.0f;
}
break;
default:
fprintf(stderr,
"%s:%d: unhandeld value in switch statement: %d\n",
__FILE__, __LINE__, node->custom1);
}
}
static void exec(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
{
tex_output(node, in, out[0], &valuefn, data);
}
void register_node_type_tex_math(ListBase *lb)
{
static bNodeType ntype;
node_type_base(&ntype, TEX_NODE_MATH, "Math", NODE_CLASS_CONVERTOR, NODE_OPTIONS,
inputs, outputs);
node_type_size(&ntype, 120, 110, 160);
node_type_label(&ntype, node_math_label);
node_type_storage(&ntype, "node_math", NULL, NULL);
node_type_exec(&ntype, exec);
nodeRegisterType(lb, &ntype);
}
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