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/* SPDX-License-Identifier: Apache-2.0
* Copyright 2011-2022 Blender Foundation */
#include "stdcycles.h"
/* Checker */
float checker(point ip)
{
point p;
p[0] = (ip[0] + 0.000001) * 0.999999;
p[1] = (ip[1] + 0.000001) * 0.999999;
p[2] = (ip[2] + 0.000001) * 0.999999;
int xi = (int)fabs(floor(p[0]));
int yi = (int)fabs(floor(p[1]));
int zi = (int)fabs(floor(p[2]));
if ((xi % 2 == yi % 2) == (zi % 2)) {
return 1.0;
}
else {
return 0.0;
}
}
shader node_checker_texture(
int use_mapping = 0,
matrix mapping = matrix(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
float Scale = 5.0,
point Vector = P,
color Color1 = 0.8,
color Color2 = 0.2,
output float Fac = 0.0,
output color Color = 0.0)
{
point p = Vector;
if (use_mapping)
p = transform(mapping, p);
Fac = checker(p * Scale);
if (Fac == 1.0) {
Color = Color1;
}
else {
Color = Color2;
}
}
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