#include "PerlinGround.hpp"

PerlinGround::PerlinGround() : surface(PerlinNoise()) {}
PerlinGround::PerlinGround(unsigned int seed) : surface(PerlinNoise(seed)) {}

double PerlinGround::operator() (double x, double z) const {
    return surface.noise(x, z);
}


Point PerlinGround::get_normal(double x, double z) const {
    const Point pt(x, surface.noise(x, z), z);
    return surface.normal_at(pt);
}