double get_specular_coef(t_lco *lpt, double *cam_pos)
{
double lvec[3];
double cvec[3];
double rvec[3];
double scal[2];
copy_tab(lpt->lvec, lvec, 3);
cvec[0] = cam_pos[0] - lpt->obj_coor[0];
cvec[1] = cam_pos[1] - lpt->obj_coor[1];
cvec[2] = cam_pos[2] - lpt->obj_coor[2];
unitaire(lvec);
unitaire(lpt->nvec);
scal[0] = scale(lvec, lpt->nvec);
rvec[0] = lvec[0] - 2.0 * scal[0] * lpt->nvec[0];
rvec[1] = lvec[1] - 2.0 * scal[0] * lpt->nvec[1];
rvec[2] = lvec[2] - 2.0 * scal[0] * lpt->nvec[2];
scal[1] = scale(rvec, cvec);
if (scal[1] < 0)
scal[1] += 360;
if (scal[1] < 90)
return (ABS(pow(cos_vector(rvec, cvec), 15)));
return (0);
}
int texture(t_vector3 eye, t_vector3 cam, t_best best)
{
unsigned int color;
int c;
double v;
double u;
double pos;
translate(&eye, best.obj.p, 1);
rot_inv(&eye, best.obj.r);
rot_inv(&cam, best.obj.r);
scale(&(cam), best.obj.s);
best.normal = unitaire(get_normal(cam, eye, best));
u = (int)(best.obj.tex.w * (0.5 + atan2(best.normal.z, best.normal.x)
/ (2 * M_PI)));
v = (int)(best.obj.tex.h * (0.5 - asin(best.normal.y) / M_PI));
pos = 4 * u + 4 * v * best.obj.tex.w;
c = (int)pos;
color = 0;
color += best.obj.tex.texture.data[c++] << 8;
color += best.obj.tex.texture.data[c++] << 16;
color += best.obj.tex.texture.data[c++] << 24;
return (color);
}
