void ft_rotate_lum_lp(double pro[3], double pos[3],
double ve2[3], t_obj *obj)
{
pro[X] = 0;
pro[Y] = 1;
pro[Z] = 0;
ft_rotate_pos_cyl(pro, obj);
xrotate(pos, obj->coo2[X]);
yrotate(pos, obj->coo2[Y]);
zrotate(pos, obj->coo2[Z]);
ve2[0] = -fabs((obj->coo[X] - pos[X]) * pro[X]);
ve2[1] = -fabs((obj->coo[Y] - pos[Y]) * pro[Y]);
ve2[2] = -fabs((obj->coo[Z] - pos[Z]) * pro[Z]);
}
void rotate(t_ba *ba, t_obj *obj, double ray[3], double cam[3])
{
ray[X] = ba->cam->ray[X];
ray[Y] = ba->cam->ray[Y];
ray[Z] = ba->cam->ray[Z];
cam[X] = ba->cam->pos[X] - obj->coo[X];
cam[Y] = ba->cam->pos[Y] - obj->coo[Y];
cam[Z] = ba->cam->pos[Z] - obj->coo[Z];
if (obj->coo2[X] != 0)
{
xrotate(ray, obj->coo2[X]);
xrotate(cam, obj->coo2[X]);
}
if (obj->coo2[Y] != 0)
{
yrotate(ray, obj->coo2[Y]);
yrotate(cam, obj->coo2[Y]);
}
if (obj->coo2[Z] != 0)
{
zrotate(ray, obj->coo2[Z]);
zrotate(cam, obj->coo2[Z]);
}
}
static void
huerotate(float mat[3][3], /* I - Matrix to append to */
float rot) /* I - Hue rotation in degrees */
{
float hmat[3][3]; /* Hue matrix */
float lx, ly, lz; /* Luminance vector */
float xrs, xrc; /* X rotation sine/cosine */
float yrs, yrc; /* Y rotation sine/cosine */
float zrs, zrc; /* Z rotation sine/cosine */
float zsx, zsy; /* Z shear x/y */
/*
* Load the identity matrix...
*/
ident(hmat);
/*
* Rotate the grey vector into positive Z...
*/
xrs = M_SQRT1_2;
xrc = M_SQRT1_2;
xrotate(hmat,xrs,xrc);
yrs = -1.0 / sqrt(3.0);
yrc = -M_SQRT2 * yrs;
yrotate(hmat,yrs,yrc);
/*
* Shear the space to make the luminance plane horizontal...
*/
xform(hmat, 0.3086, 0.6094, 0.0820, &lx, &ly, &lz);
zsx = lx / lz;
zsy = ly / lz;
zshear(hmat, zsx, zsy);
/*
* Rotate the hue...
*/
zrs = sin(rot * M_PI / 180.0);
zrc = cos(rot * M_PI / 180.0);
zrotate(hmat, zrs, zrc);
/*
* Unshear the space to put the luminance plane back...
*/
zshear(hmat, -zsx, -zsy);
/*
* Rotate the grey vector back into place...
*/
yrotate(hmat, -yrs, yrc);
xrotate(hmat, -xrs, xrc);
/*
* Append it to the current matrix...
*/
mult(hmat, mat, mat);
}
