void main(void)
{
#ifdef HAS_OES_DERIVATIVES
highp vec3 materialBump = mix( vec3(0.5, 0.5, 1.0),
texture2D( uMapNormal,
vec2(vKdMapCoord.s / uMapNormalScale.s,
vKdMapCoord.t / uMapNormalScale.t)).xyz,
uNormalEmphasis);
materialBump = normalize (materialBump*2.0 - 1.0);
highp vec3 normal = perturb_normal( normalize(vNormal.xyz),
vPosition.xyz,
materialBump,
vec2(vKdMapCoord.s / uMapNormalScale.s,
vKdMapCoord.t / uMapNormalScale.t) );
gl_FragColor = vec4(normal, vpPosition.z/vpPosition.w);
//gl_FragColor = vec4(materialBump, vpPosition.z/vpPosition.w);
//gl_FragColor = vec4(normal.x*0.5 + 0.5, normal.y*0.5 + 0.5, normal.z*0.5 + 0.5, 1);
#else
gl_FragColor = vec4(vNormal.xyz, vpPosition.z/vpPosition.w);
#endif
}
void tangle_normal(double *nvec, double *obj_coor,
double *pert, t_obj *obj)
{
nvec[0] = 4 * pow(obj_coor[0], 3) - 20 * pow(obj->size[0], 2) * obj_coor[0];
nvec[1] = 4 * pow(obj_coor[1], 3) - 20 * pow(obj->size[0], 2) * obj_coor[1];
nvec[2] = 4 * pow(obj_coor[2], 3) - 20 * pow(obj->size[0], 2) * obj_coor[2];
if (obj->ipt->bump > ZERO)
apply_bump(nvec, obj_coor, obj->ipt->bump);
perturb_normal(nvec, obj_coor, pert);
}
void tore_normal(double *nvec, double *obj_coor,
double *pert, t_obj *obj)
{
double k;
k = 4 * (pow(obj_coor[0], 2)
+ pow(obj_coor[1], 2)
+ pow(obj_coor[2], 2)
+ pow(obj->size[0], 2)
- pow(obj->size[1], 2));
nvec[0] = obj_coor[0] * k - 8.0 * pow(obj->size[0], 2) * obj_coor[0];
nvec[1] = obj_coor[1] * k - 8.0 * pow(obj->size[0], 2) * obj_coor[1];
nvec[2] = obj_coor[2] * k;
if (obj->ipt->bump > ZERO)
apply_bump(nvec, obj_coor, obj->ipt->bump);
perturb_normal(nvec, obj_coor, pert);
}
