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/*
* 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.
*/
/** \file
* \ingroup texnodes
*/
#include "node_texture_util.h"
#include "NOD_texture.h"
/* **************** SCALAR MATH ******************** */
static bNodeSocketTemplate inputs[] = {
{SOCK_FLOAT, 1, N_("Value"), 0.5f, 0.5f, 0.5f, 1.0f, -100.0f, 100.0f, PROP_NONE},
{SOCK_FLOAT, 1, N_("Value"), 0.5f, 0.5f, 0.5f, 1.0f, -100.0f, 100.0f, PROP_NONE},
{-1, 0, ""},
};
static bNodeSocketTemplate outputs[] = {
{SOCK_FLOAT, 0, N_("Value")},
{-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 NODE_MATH_ADD:
*out = in0 + in1;
break;
case NODE_MATH_SUB:
*out = in0 - in1;
break;
case NODE_MATH_MUL:
*out = in0 * in1;
break;
case NODE_MATH_DIVIDE: {
if (in1 == 0) {
/* We don't want to divide by zero. */
*out = 0.0;
}
else {
*out = in0 / in1;
}
break;
}
case NODE_MATH_SIN: {
*out = sinf(in0);
break;
}
case NODE_MATH_COS: {
*out = cosf(in0);
break;
}
case NODE_MATH_TAN: {
*out = tanf(in0);
break;
}
case NODE_MATH_ASIN: {
/* Can't do the impossible... */
if (in0 <= 1 && in0 >= -1) {
*out = asinf(in0);
}
else {
*out = 0.0;
}
break;
}
case NODE_MATH_ACOS: {
/* Can't do the impossible... */
if (in0 <= 1 && in0 >= -1) {
*out = acosf(in0);
}
else {
*out = 0.0;
}
break;
}
case NODE_MATH_ATAN: {
*out = atan(in0);
break;
}
case NODE_MATH_POW: {
/* 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 NODE_MATH_LOG: {
/* Don't want any imaginary numbers... */
if (in0 > 0 && in1 > 0) {
*out = log(in0) / log(in1);
}
else {
*out = 0.0;
}
break;
}
case NODE_MATH_MIN: {
if (in0 < in1) {
*out = in0;
}
else {
*out = in1;
}
break;
}
case NODE_MATH_MAX: {
if (in0 > in1) {
*out = in0;
}
else {
*out = in1;
}
break;
}
case NODE_MATH_ROUND: {
*out = (in0 < 0) ? (int)(in0 - 0.5f) : (int)(in0 + 0.5f);
break;
}
case NODE_MATH_LESS: {
if (in0 < in1) {
*out = 1.0f;
}
else {
*out = 0.0f;
}
break;
}
case NODE_MATH_GREATER: {
if (in0 > in1) {
*out = 1.0f;
}
else {
*out = 0.0f;
}
break;
}
case NODE_MATH_MOD: {
if (in1 == 0.0f) {
*out = 0.0f;
}
else {
*out = fmod(in0, in1);
}
break;
}
case NODE_MATH_ABS: {
*out = fabsf(in0);
break;
}
case NODE_MATH_ATAN2: {
*out = atan2(in0, in1);
break;
}
case NODE_MATH_FLOOR: {
*out = floorf(in0);
break;
}
case NODE_MATH_CEIL: {
*out = ceilf(in0);
break;
}
case NODE_MATH_FRACT: {
*out = in0 - floorf(in0);
break;
}
case NODE_MATH_SQRT: {
if (in0 > 0.0f) {
*out = sqrtf(in0);
}
else {
*out = 0.0f;
}
break;
}
default: {
BLI_assert(0);
break;
}
}
if (node->custom2 & SHD_MATH_CLAMP) {
CLAMP(*out, 0.0f, 1.0f);
}
}
static void exec(void *data,
int UNUSED(thread),
bNode *node,
bNodeExecData *execdata,
bNodeStack **in,
bNodeStack **out)
{
tex_output(node, execdata, in, out[0], &valuefn, data);
}
void register_node_type_tex_math(void)
{
static bNodeType ntype;
tex_node_type_base(&ntype, TEX_NODE_MATH, "Math", NODE_CLASS_CONVERTOR, 0);
node_type_socket_templates(&ntype, inputs, outputs);
node_type_label(&ntype, node_math_label);
node_type_storage(&ntype, "", NULL, NULL);
node_type_exec(&ntype, NULL, NULL, exec);
nodeRegisterType(&ntype);
}
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