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/*
* $Id$
*
* ***** 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 *****
*/
/** \file blender/nodes/intern/CMP_nodes/CMP_math.c
* \ingroup cmpnodes
*/
#include "../CMP_util.h"
/* **************** SCALAR MATH ******************** */
static bNodeSocketType cmp_node_math_in[]= {
{ SOCK_VALUE, 1, "Value", 0.5f, 0.5f, 0.5f, 1.0f, -10000.0f, 10000.0f},
{ SOCK_VALUE, 1, "Value", 0.5f, 0.5f, 0.5f, 1.0f, -10000.0f, 10000.0f},
{ -1, 0, "" }
};
static bNodeSocketType cmp_node_math_out[]= {
{ SOCK_VALUE, 0, "Value", 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
{ -1, 0, "" }
};
static void do_math(bNode *node, float *out, float *in, float *in2)
{
switch(node->custom1)
{
case 0: /* Add */
out[0]= in[0] + in2[0];
break;
case 1: /* Subtract */
out[0]= in[0] - in2[0];
break;
case 2: /* Multiply */
out[0]= in[0] * in2[0];
break;
case 3: /* Divide */
{
if(in2[0]==0) /* We don't want to divide by zero. */
out[0]= 0.0;
else
out[0]= in[0] / in2[0];
}
break;
case 4: /* Sine */
out[0]= sin(in[0]);
break;
case 5: /* Cosine */
out[0]= cos(in[0]);
break;
case 6: /* Tangent */
out[0]= tan(in[0]);
break;
case 7: /* Arc-Sine */
{
/* Can't do the impossible... */
if(in[0] <= 1 && in[0] >= -1 )
out[0]= asin(in[0]);
else
out[0]= 0.0;
}
break;
case 8: /* Arc-Cosine */
{
/* Can't do the impossible... */
if( in[0] <= 1 && in[0] >= -1 )
out[0]= acos(in[0]);
else
out[0]= 0.0;
}
break;
case 9: /* Arc-Tangent */
out[0]= atan(in[0]);
break;
case 10: /* Power */
{
/* Only raise negative numbers by full integers */
if( in[0] >= 0 ) {
out[0]= pow(in[0], in2[0]);
} else {
float y_mod_1 = fmod(in2[0], 1);
/* if input value is not nearly an integer, fall back to zero, nicer than straight rounding */
if (y_mod_1 > 0.999 || y_mod_1 < 0.001) {
out[0]= pow(in[0], floor(in2[0] + 0.5));
} else {
out[0] = 0.0;
}
}
}
break;
case 11: /* Logarithm */
{
/* Don't want any imaginary numbers... */
if( in[0] > 0 && in2[0] > 0 )
out[0]= log(in[0]) / log(in2[0]);
else
out[0]= 0.0;
}
break;
case 12: /* Minimum */
{
if( in[0] < in2[0] )
out[0]= in[0];
else
out[0]= in2[0];
}
break;
case 13: /* Maximum */
{
if( in[0] > in2[0] )
out[0]= in[0];
else
out[0]= in2[0];
}
break;
case 14: /* Round */
{
out[0]= (out[0]<0)?(int)(in[0] - 0.5f):(int)(in[0] + 0.5f);
}
break;
case 15: /* Less Than */
{
if( in[0] < in2[0] )
out[0]= 1.0f;
else
out[0]= 0.0f;
}
break;
case 16: /* Greater Than */
{
if( in[0] > in2[0] )
out[0]= 1.0f;
else
out[0]= 0.0f;
}
break;
}
}
static void node_composit_exec_math(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
{
CompBuf *cbuf=in[0]->data;
CompBuf *cbuf2=in[1]->data;
CompBuf *stackbuf;
/* check for inputs and outputs for early out*/
if(out[0]->hasoutput==0) return;
/* no image-color operation */
if(in[0]->data==NULL && in[1]->data==NULL) {
do_math(node, out[0]->vec, in[0]->vec, in[1]->vec);
return;
}
/*create output based on first input */
if(cbuf) {
stackbuf=alloc_compbuf(cbuf->x, cbuf->y, CB_VAL, 1);
}
/* and if it doesn't exist use the second input since we
know that one of them must exist at this point*/
else {
stackbuf=alloc_compbuf(cbuf2->x, cbuf2->y, CB_VAL, 1);
}
/* operate in case there's valid size */
composit2_pixel_processor(node, stackbuf, in[0]->data, in[0]->vec, in[1]->data, in[1]->vec, do_math, CB_VAL, CB_VAL);
out[0]->data= stackbuf;
}
void register_node_type_cmp_math(ListBase *lb)
{
static bNodeType ntype;
node_type_base(&ntype, CMP_NODE_MATH, "Math", NODE_CLASS_CONVERTOR, NODE_OPTIONS,
cmp_node_math_in, cmp_node_math_out);
node_type_size(&ntype, 120, 110, 160);
node_type_label(&ntype, node_math_label);
node_type_exec(&ntype, node_composit_exec_math);
nodeRegisterType(lb, &ntype);
}
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