textures/base/pack/server_ping_1.png

/*
Minetest
Copyright (C) 2010-2013 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 "numeric.h"
#include "mathconstants.h"

#include "../log.h"
#include "../constants.h" // BS, MAP_BLOCKSIZE
#include <iostream>

// Calculate the borders of a "d-radius" cube
void getFacePositions(std::list<v3s16> &list, u16 d)
{
	if(d == 0)
	{
		list.push_back(v3s16(0,0,0));
		return;
	}
	if(d == 1)
	{
		/*
			This is an optimized sequence of coordinates.
		*/
		list.push_back(v3s16( 0, 1, 0)); // top
		list.push_back(v3s16( 0, 0, 1)); // back
		list.push_back(v3s16(-1, 0, 0)); // left
		list.push_back(v3s16( 1, 0, 0)); // right
		list.push_back(v3s16( 0, 0,-1)); // front
		list.push_back(v3s16( 0,-1, 0)); // bottom
		// 6
		list.push_back(v3s16(-1, 0, 1)); // back left
		list.push_back(v3s16( 1, 0, 1)); // back right
		list.push_back(v3s16(-1, 0,-1)); // front left
		list.push_back(v3s16( 1, 0,-1)); // front right
		list.push_back(v3s16(-1,-1, 0)); // bottom left
		list.push_back(v3s16( 1,-1, 0)); // bottom right
		list.push_back(v3s16( 0,-1, 1)); // bottom back
		list.push_back(v3s16( 0,-1,-1)); // bottom front
		list.push_back(v3s16(-1, 1, 0)); // top left
		list.push_back(v3s16( 1, 1, 0)); // top right
		list.push_back(v3s16( 0, 1, 1)); // top back
		list.push_back(v3s16( 0, 1,-1)); // top front
		// 18
		list.push_back(v3s16(-1, 1, 1)); // top back-left
		list.push_back(v3s16( 1, 1, 1)); // top back-right
		list.push_back(v3s16(-1, 1,-1)); // top front-left
		list.push_back(v3s16( 1, 1,-1)); // top front-right
		list.push_back(v3s16(-1,-1, 1)); // bottom back-left
		list.push_back(v3s16( 1,-1, 1)); // bottom back-right
		list.push_back(v3s16(-1,-1,-1)); // bottom front-left
		list.push_back(v3s16( 1,-1,-1)); // bottom front-right
		// 26
		return;
	}

	// Take blocks in all sides, starting from y=0 and going +-y
	for(s16 y=0; y<=d-1; y++)
	{
		// Left and right side, including borders
		for(s16 z=-d; z<=d; z++)
		{
			list.push_back(v3s16(d,y,z));
			list.push_back(v3s16(-d,y,z));
			if(y != 0)
			{
				list.push_back(v3s16(d,-y,z));
				list.push_back(v3s16(-d,-y,z));
			}
		}
		// Back and front side, excluding borders
		for(s16 x=-d+1; x<=d-1; x++)
		{
			list.push_back(v3s16(x,y,d));
			list.push_back(v3s16(x,y,-d));
			if(y != 0)
			{
				list.push_back(v3s16(x,-y,d));
				list.push_back(v3s16(x,-y,-d));
			}
		}
	}

	// Take the bottom and top face with borders
	// -d<x<d, y=+-d, -d<z<d
	for(s16 x=-d; x<=d; x++)
	for(s16 z=-d; z<=d; z++)
	{
		list.push_back(v3s16(x,-d,z));
		list.push_back(v3s16(x,d,z));
	}
}

/*
    myrand
*/

static unsigned long next = 1;

/* RAND_MAX assumed to be 32767 */
int myrand(void)
{
   next = next * 1103515245 + 12345;
   return((unsigned)(next/65536) % 32768);
}

void mysrand(unsigned seed)
{
   next = seed;
}

int myrand_range(int min, int max)
{
	if(max-min > MYRAND_MAX)
	{
		errorstream<<"WARNING: myrand_range: max-min > MYRAND_MAX"<<std::endl;
        max = min + MYRAND_MAX;
	}
	if(min > max)
	{
		errorstream<<"WARNING: myrand_range: min > max"<<std::endl;
		return max;
	}
ofs	hex dump	ascii
0000	89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 00 00 00 10 00 00 00 10 08 06 00 00 00 1f f3 ff	.PNG........IHDR................
0020	61 00 00 00 06 62 4b 47 44 00 5b 00 5b 00 5b 2a d0 0c 88 00 00 00 09 70 48 59 73 00 00 0b 13 00	a....bKGD.[.[.[*.......pHYs.....
0040	00 0b 13 01 00 9a 9c 18 00 00 00 07 74 49 4d 45 07 e1 02 02 10 31 17 98 ad d8 69 00 00 00 88 49	............tIME.....1....i....I
0060	44 41 54 38 cb 63 b4 b0 b0 60 a0 04 30 31 50 08 86 a0 01 ca ca ca ff 95 95 95 ff c3 f8 2c 14 58	DAT8.c...`..01P..............,.X
0080	fe 9f 28 17 a0 db 88 0e 58 48 b5 91 60 18 10 b2 91 14 17 10 65 08 d3 89 e3 2f ff 9f 38 fe f2 3f	..(.....XH..`.......e..../..8..?
00a0	b9 21 09 77 c1 09 ff eb ff 19 18 18 18 94 af 28 93 64 00 23 c3 7f 45 08 ab e3 1d c4 15 15 42 8c	.!.w...........(.d.#..E.......B.
00c0	0c 0c 0c 0c 16 96 e2 ff 19 18 18 18 4e 1c 7f 89 97 cf 62 61 29 0e 75 c1 3b 98 04 cc 45 50 be 26	............N.....ba).u.;...EP.&
00e0	5e 3e e3 80 e7 46 00 ba 48 2f 98 35 4a bd cb 00 00 00 00 49 45 4e 44 ae 42 60 82	^>...F..H/.5J......IEND.B`.