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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "genericobject.h"
#include <sstream>
#include "util/serialize.h"

std::string gob_cmd_set_properties(const ObjectProperties &prop)
{
	std::ostringstream os(std::ios::binary);
	writeU8(os, GENERIC_CMD_SET_PROPERTIES);
	prop.serialize(os);
	return os.str();
}

ObjectProperties gob_read_set_properties(std::istream &is)
{
	ObjectProperties prop;
	prop.deSerialize(is);
	return prop;
}

std::string gob_cmd_update_position(
	v3f position,
	v3f velocity,
	v3f acceleration,
	f32 yaw,
	bool do_interpolate,
	bool is_movement_end,
	f32 update_interval
){
	std::ostringstream os(std::ios::binary);
	// command
	writeU8(os, GENERIC_CMD_UPDATE_POSITION);
	// pos
	writeV3F1000(os, position);
	// velocity
	writeV3F1000(os, velocity);
	// acceleration
	writeV3F1000(os, acceleration);
	// yaw
	writeF1000(os, yaw);
	// do_interpolate
	writeU8(os, do_interpolate);
	// is_end_position (for interpolation)
	writeU8(os, is_movement_end);
	// update_interval (for interpolation)
	writeF1000(os, update_interval);
	return os.str();
}

std::string gob_cmd_set_texture_mod(const std::string &mod)
{
	std::ostringstream os(std::ios::binary);
	// command 
	writeU8(os, GENERIC_CMD_SET_TEXTURE_MOD);
	// parameters
	os<<serializeString(mod);
	return os.str();
}

std::string gob_cmd_set_sprite(
	v2s16 p,
	u16 num_frames,
	f32 framelength,
	bool select_horiz_by_yawpitch
){
	std::ostringstream os(std::ios::binary);
	// command
	writeU8(os, GENERIC_CMD_SET_SPRITE);
	// parameters
	writeV2S16(os, p);
	writeU16(os, num_frames);
	writeF1000(os, framelength);
	writeU8(os, select_horiz_by_yawpitch);
	return os.str();
}

std::string gob_cmd_punched(s16 damage, s16 result_hp)
{
	std::ostringstream os(std::ios::binary);
	// command 
	writeU8(os, GENERIC_CMD_PUNCHED);
	// damage
	writeS16(os, damage);
	// result_hp
	writeS16(os, result_hp);
	return os.str();
}

std::string gob_cmd_update_armor_groups(const ItemGroupList &armor_groups)
{
	std::ostringstream os(std::ios::binary);
	writeU8(os, GENERIC_CMD_UPDATE_ARMOR_GROUPS);
	writeU16(os, armor_groups.size());
	for(ItemGroupList::const_iterator i = armor_groups.begin();
			i != armor_groups.end(); i++){
		os<<serializeString(i->first);
		writeS16(os, i->second);
	}
	return os.str();
}

std::string gob_cmd_update_physics_override(float physics_override_speed, float physics_override_jump,
		float physics_override_gravity, bool sneak, bool sneak_glitch)
{
	std::ostringstream os(std::ios::binary);
	// command 
	writeU8(os, GENERIC_CMD_SET_PHYSICS_OVERRIDE);
	// parameters
	writeF1000(os, physics_override_speed);
	writeF1000(os, physics_override_jump);
	writeF1000(os, physics_override_gravity);
	// these are sent inverted so we get true when the server sends nothing
	writeU8(os, !sneak);
	writeU8(os, !sneak_glitch);
	return os.str();
}

std::string gob_cmd_update_animation(v2f frames, float frame_speed, float frame_blend)
{
	std::ostringstream os(std::ios::binary);
	// command 
	writeU8(os, GENERIC_CMD_SET_ANIMATION);
	// parameters
	writeV2F1000(os, frames);
	writeF1000(os, frame_speed);
	writeF1000(os, frame_blend);
	return os.str();
}

std::string gob_cmd_update_bone_position(std::string bone, v3f position, v3f rotation)
{
	std::ostringstream os(std::ios::binary);
	// command 
	writeU8(os, GENERIC_CMD_SET_BONE_POSITION);
	// parameters
	os<<serializeString(bone);
	writeV3F1000(os, position);
	writeV3F1000(os, rotation);
	return os.str();
}

std::string gob_cmd_update_attachment(int parent_id, std::string bone, v3f position, v3f rotation)
{
	std::ostringstream os(std::ios::binary);
	// command 
	writeU8(os, GENERIC_CMD_SET_ATTACHMENT);
	// parameters
	writeS16(os, parent_id);
	os<<serializeString(bone);
	writeV3F1000(os, position);
	writeV3F1000(os, rotation);
	return os.str();
}

' href='#n729'>729 730 731 732 733 734 735
/*
 * Minetest
 * Copyright (C) 2010-2014 celeron55, Perttu Ahola <celeron55@gmail.com>
 * Copyright (C) 2010-2014 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *  1. Redistributions of source code must retain the above copyright notice, this list of
 *     conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright notice, this list
 *     of conditions and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <math.h>
#include "noise.h"
#include <iostream>
#include <string.h> // memset
#include "debug.h"
#include "util/numeric.h"
#include "util/string.h"
#include "exceptions.h"

#define NOISE_MAGIC_X    1619
#define NOISE_MAGIC_Y    31337
#define NOISE_MAGIC_Z    52591
#define NOISE_MAGIC_SEED 1013

typedef float (*Interp2dFxn)(
		float v00, float v10, float v01, float v11,
		float x, float y);

typedef float (*Interp3dFxn)(
		float v000, float v100, float v010, float v110,
		float v001, float v101, float v011, float v111,
		float x, float y, float z);

float cos_lookup[16] = {
	1.0,  0.9238,  0.7071,  0.3826, 0, -0.3826, -0.7071, -0.9238,
	1.0, -0.9238, -0.7071, -0.3826, 0,  0.3826,  0.7071,  0.9238
};

FlagDesc flagdesc_noiseparams[] = {
	{"defaults",    NOISE_FLAG_DEFAULTS},
	{"eased",       NOISE_FLAG_EASED},
	{"absvalue",    NOISE_FLAG_ABSVALUE},
	{"pointbuffer", NOISE_FLAG_POINTBUFFER},
	{"simplex",     NOISE_FLAG_SIMPLEX},
	{NULL,          0}
};

///////////////////////////////////////////////////////////////////////////////


float noise2d(int x, int y, int seed)
{
	int n = (NOISE_MAGIC_X * x + NOISE_MAGIC_Y * y
			+ NOISE_MAGIC_SEED * seed) & 0x7fffffff;
	n = (n >> 13) ^ n;
	n = (n * (n * n * 60493 + 19990303) + 1376312589) & 0x7fffffff;
	return 1.f - (float)n / 0x40000000;
}


float noise3d(int x, int y, int z, int seed)
{
	int n = (NOISE_MAGIC_X * x + NOISE_MAGIC_Y * y + NOISE_MAGIC_Z * z
			+ NOISE_MAGIC_SEED * seed) & 0x7fffffff;
	n = (n >> 13) ^ n;
	n = (n * (n * n * 60493 + 19990303) + 1376312589) & 0x7fffffff;
	return 1.f - (float)n / 0x40000000;
}


inline float dotProduct(float vx, float vy, float wx, float wy)
{
	return vx * wx + vy * wy;
}


inline float linearInterpolation(float v0, float v1, float t)
{
	return v0 + (v1 - v0) * t;
}


inline float biLinearInterpolation(
	float v00, float v10,
	float v01, float v11,
	float x, float y)
{
	float tx = easeCurve(x);
	float ty = easeCurve(y);
#if 0
	return (
		v00 * (1 - tx) * (1 - ty) +
		v10 *      tx  * (1 - ty) +
		v01 * (1 - tx) *      ty  +
		v11 *      tx  *      ty
	);
#endif
	float u = linearInterpolation(v00, v10, tx);
	float v = linearInterpolation(v01, v11, tx);
	return linearInterpolation(u, v, ty);
}


inline float biLinearInterpolationNoEase(
	float v00, float v10,
	float v01, float v11,
	float x, float y)
{
	float u = linearInterpolation(v00, v10, x);
	float v = linearInterpolation(v01, v11, x);
	return linearInterpolation(u, v, y);
}


float triLinearInterpolation(
	float v000, float v100, float v010, float v110,
	float v001, float v101, float v011, float v111,
	float x, float y, float z)
{
	float tx = easeCurve(x);
	float ty = easeCurve(y);
	float tz = easeCurve(z);
#if 0
	return (
		v000 * (1 - tx) * (1 - ty) * (1 - tz) +
		v100 *      tx  * (1 - ty) * (1 - tz) +
		v010 * (1 - tx) *      ty  * (1 - tz) +
		v110 *      tx  *      ty  * (1 - tz) +
		v001 * (1 - tx) * (1 - ty) *      tz  +
		v101 *      tx  * (1 - ty) *      tz  +
		v011 * (1 - tx) *      ty  *      tz  +
		v111 *      tx  *      ty  *      tz
	);
#endif
	float u = biLinearInterpolationNoEase(v000, v100, v010, v110, tx, ty);
	float v = biLinearInterpolationNoEase(v001, v101, v011, v111, tx, ty);
	return linearInterpolation(u, v, tz);
}

float triLinearInterpolationNoEase(
	float v000, float v100, float v010, float v110,
	float v001, float v101, float v011, float v111,
	float x, float y, float z)
{
	float u = biLinearInterpolationNoEase(v000, v100, v010, v110, x, y);
	float v = biLinearInterpolationNoEase(v001, v101, v011, v111, x, y);
	return linearInterpolation(u, v, z);
}


#if 0
float noise2d_gradient(float x, float y, int seed)
{
	// Calculate the integer coordinates
	int x0 = (x > 0.0 ? (int)x : (int)x - 1);
	int y0 = (y > 0.0 ? (int)y : (int)y - 1);
	// Calculate the remaining part of the coordinates
	float xl = x - (float)x0;
	float yl = y - (float)y0;
	// Calculate random cosine lookup table indices for the integer corners.
	// They are looked up as unit vector gradients from the lookup table.
	int n00 = (int)((noise2d(x0, y0, seed)+1)*8);
	int n10 = (int)((noise2d(x0+1, y0, seed)+1)*8);
	int n01 = (int)((noise2d(x0, y0+1, seed)+1)*8);
	int n11 = (int)((noise2d(x0+1, y0+1, seed)+1)*8);
	// Make a dot product for the gradients and the positions, to get the values
	float s = dotProduct(cos_lookup[n00], cos_lookup[(n00+12)%16], xl, yl);
	float u = dotProduct(-cos_lookup[n10], cos_lookup[(n10+12)%16], 1.-xl, yl);
	float v = dotProduct(cos_lookup[n01], -cos_lookup[(n01+12)%16], xl, 1.-yl);
	float w = dotProduct(-cos_lookup[n11], -cos_lookup[(n11+12)%16], 1.-xl, 1.-yl);
	// Interpolate between the values
	return biLinearInterpolation(s,u,v,w,xl,yl);
}
#endif


float noise2d_gradient(float x, float y, int seed, bool eased)
{
	// Calculate the integer coordinates
	int x0 = myfloor(x);
	int y0 = myfloor(y);
	// Calculate the remaining part of the coordinates
	float xl = x - (float)x0;
	float yl = y - (float)y0;
	// Get values for corners of square
	float v00 = noise2d(x0, y0, seed);
	float v10 = noise2d(x0+1, y0, seed);
	float v01 = noise2d(x0, y0+1, seed);
	float v11 = noise2d(x0+1, y0+1, seed);
	// Interpolate
	if (eased)
		return biLinearInterpolation(v00, v10, v01, v11, xl, yl);
	else
		return biLinearInterpolationNoEase(v00, v10, v01, v11, xl, yl);
}


float noise3d_gradient(float x, float y, float z, int seed, bool eased)
{
	// Calculate the integer coordinates
	int x0 = myfloor(x);
	int y0 = myfloor(y);
	int z0 = myfloor(z);
	// Calculate the remaining part of the coordinates
	float xl = x - (float)x0;
	float yl = y - (float)y0;
	float zl = z - (float)z0;
	// Get values for corners of cube
	float v000 = noise3d(x0,     y0,     z0,     seed);
	float v100 = noise3d(x0 + 1, y0,     z0,     seed);
	float v010 = noise3d(x0,     y0 + 1, z0,     seed);
	float v110 = noise3d(x0 + 1, y0 + 1, z0,     seed);
	float v001 = noise3d(x0,     y0,     z0 + 1, seed);
	float v101 = noise3d(x0 + 1, y0,     z0 + 1, seed);
	float v011 = noise3d(x0,     y0 + 1, z0 + 1, seed);
	float v111 = noise3d(x0 + 1, y0 + 1, z0 + 1, seed);
	// Interpolate
	if (eased) {
		return triLinearInterpolation(
			v000, v100, v010, v110,
			v001, v101, v011, v111,
			xl, yl, zl);
	} else {
		return triLinearInterpolationNoEase(
			v000, v100, v010, v110,
			v001, v101, v011, v111,
			xl, yl, zl);
	}
}


float noise2d_perlin(float x, float y, int seed,
	int octaves, float persistence, bool eased)
{
	float a = 0;
	float f = 1.0;
	float g = 1.0;
	for (int i = 0; i < octaves; i++)
	{
		a += g * noise2d_gradient(x * f, y * f, seed + i, eased);
		f *= 2.0;
		g *= persistence;
	}
	return a;
}


float noise2d_perlin_abs(float x, float y, int seed,
	int octaves, float persistence, bool eased)
{
	float a = 0;
	float f = 1.0;
	float g = 1.0;
	for (int i = 0; i < octaves; i++) {
		a += g * fabs(noise2d_gradient(x * f, y * f, seed + i, eased));
		f *= 2.0;
		g *= persistence;
	}
	return a;
}


float noise3d_perlin(float x, float y, float z, int seed,
	int octaves, float persistence, bool eased)
{
	float a = 0;
	float f = 1.0;
	float g = 1.0;
	for (int i = 0; i < octaves; i++) {
		a += g * noise3d_gradient(x * f, y * f, z * f, seed + i, eased);
		f *= 2.0;
		g *= persistence;
	}
	return a;
}


float noise3d_perlin_abs(float x, float y, float z, int seed,
	int octaves, float persistence, bool eased)
{
	float a = 0;
	float f = 1.0;
	float g = 1.0;
	for (int i = 0; i < octaves; i++) {
		a += g * fabs(noise3d_gradient(x * f, y * f, z * f, seed + i, eased));
		f *= 2.0;