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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2005 Blender Foundation. All rights reserved. */
/** \file
* \ingroup texnodes
*/
#include <math.h>
#include "NOD_texture.h"
#include "node_texture_util.h"
static bNodeSocketTemplate inputs[] = {
{SOCK_RGBA, N_("Color"), 0.0f, 0.0f, 0.0f, 1.0f},
{SOCK_FLOAT, N_("Turns"), 0.0f, 0.0f, 0.0f, 0.0f, -1.0f, 1.0f, PROP_NONE},
{SOCK_VECTOR, N_("Axis"), 0.0f, 0.0f, 1.0f, 0.0f, -1.0f, 1.0f, PROP_DIRECTION},
{-1, ""},
};
static bNodeSocketTemplate outputs[] = {
{SOCK_RGBA, N_("Color")},
{-1, ""},
};
static void rotate(float new_co[3], float a, const float ax[3], const float co[3])
{
float para[3];
float perp[3];
float cp[3];
float cos_a = cosf(a * (float)(2 * M_PI));
float sin_a = sinf(a * (float)(2 * M_PI));
/* `x' = xcosa + n(n.x)(1-cosa) + (x*n)sina`. */
mul_v3_v3fl(perp, co, cos_a);
mul_v3_v3fl(para, ax, dot_v3v3(co, ax) * (1 - cos_a));
cross_v3_v3v3(cp, ax, co);
mul_v3_fl(cp, sin_a);
new_co[0] = para[0] + perp[0] + cp[0];
new_co[1] = para[1] + perp[1] + cp[1];
new_co[2] = para[2] + perp[2] + cp[2];
}
static void colorfn(float *out, TexParams *p, bNode *UNUSED(node), bNodeStack **in, short thread)
{
float new_co[3], new_dxt[3], new_dyt[3], a, ax[3];
a = tex_input_value(in[1], p, thread);
tex_input_vec(ax, in[2], p, thread);
rotate(new_co, a, ax, p->co);
if (p->osatex) {
rotate(new_dxt, a, ax, p->dxt);
rotate(new_dyt, a, ax, p->dyt);
}
{
TexParams np = *p;
np.co = new_co;
np.dxt = new_dxt;
np.dyt = new_dyt;
tex_input_rgba(out, in[0], &np, thread);
}
}
static void exec(void *data,
int UNUSED(thread),
bNode *node,
bNodeExecData *execdata,
bNodeStack **in,
bNodeStack **out)
{
tex_output(node, execdata, in, out[0], &colorfn, data);
}
void register_node_type_tex_rotate(void)
{
static bNodeType ntype;
tex_node_type_base(&ntype, TEX_NODE_ROTATE, "Rotate", NODE_CLASS_DISTORT);
node_type_socket_templates(&ntype, inputs, outputs);
ntype.exec_fn = exec;
nodeRegisterType(&ntype);
}
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