#include "main.h"

#include <stdio.h>

/*
	KLEIN Format:
		5 bytes with KLEIN
		1 byte empty for scaling
		1 byte with the dimention of the surface
		8 bytes interprated as an int  with the number of vertex
		n bytes with the vertex data of the surface
		n bytes with the normal data of the surface

	where n is the size of the vertex and normal data that could be 
	calculated as the dimention of the surface  time the number of vertes 
	time the size of a 16 bytes float.
*/

int create_surface_klein(unsigned char *path, struct surface *surface)
{
	unsigned long size;
	char buffer[5];
	FILE *file = fopen(path, "rb");
	if (!file)
		return 1;

	fread(buffer, 1, 5, file);

	if (strncmp(buffer, "KLEIN", 5))
		return 1;

	fread(buffer, 1, 1, file);
	fread(&surface->dim, 1, 1, file);
	fread(&surface->vertex, 8, 1, file);

	size = surface->dim * surface->vertex;

	surface->data = malloc(4 * size);
	fread(surface->data, 4, size, file);

	surface->norm = malloc(4 * size);
	fread(surface->norm, 4, size, file);
	return 0;
}