#ifndef LIBNOISE_H_
#define LIBNOISE_H_

enum {
	NOISE_PERLIN, NOISE_SIMPLEX, NOISE_WHITE, NOISE_BLUE
};

struct noise_generator {
	int type;
	int seed;
	int perm[512];
};

double noise_simplex(int dim, double *vec);
double noise_perlin(int dim, double *vec);
double noise_gen(struct noise_generator *gen, int dim, double *vec);
int noise_gen_vec(struct noise_generator *gen, int dim, double *vec, int npoints, double *result);
double noise_fbm(struct noise_generator *gen, int dim, double *vec, double persistence);

struct noise_generator *noise_gen_init(struct noise_generator *g, int type, int dim, int seed);

/*
 * takes a start and end point and generates a noisy line between them
 *
 * line is constrained to be in a quadrilateral defined by the two end points
 * and two points equidistant from ... hmm, not sure how to specify dimensions
 * less than two don't make any sense.
 *
 * linevec is filled in with computed points
 */

int noise_line(struct noise_generator *gen, int dim, double *start, double *end, double width, int segments, double *linevec);

/*
 * noise_polygon?
 * noise_patch?
 * noise_mesh?
 */

#endif