Calculators Effects >>> Landscape Grapher.


		<script 
		language="javascript"
		type="text/javascript">

		/* Visit http://www.yaldex.com/ 
		for full source code

		and get more free JavaScript, CSS and DHTML scripts! */

		<!-- Begin

		var 
		WIDTH =
		1;

		var 
		XA =
		0;

		var 
		XB =
		17;

		var 
		YA =
		0;

		var 
		YB =
		17;

		var 
		Z1 =
		0;

		var 
		Z2 =
		0;

		var 
		Z3 =
		0;

		var 
		Z4 =
		0;

		var 
		XADD =
		10;
		// move x axis left on screen

		var 
		YADD =
		-8;
		// lower y axis view

		var 
		LEVEL_UNDEFINED =
		99999;

		var 
		LEVEL_WATER =
		-1;

		

		picType 
		=
		new
		Array();

		pic 
		=
		new
		Array();

		

		var 
		steep;

		var 
		sealevel;

		var 
		buf =
		"";

		var 
		buf2 =
		"";

		var 
		pic0;

		

		function 
		ZColor ( 
		z0)
		{

		var 
		t1;

		if
		( 
		z0 == 
		LEVEL_WATER )
		{

		return
		'<TT><FONT COLOR="#000099">'
		+
		"S"
		+
		"</FONT></TT>";

		}

		if
		( 
		z0 == 
		LEVEL_UNDEFINED )
		{

		return
		'<TT><FONT COLOR="#000099">'
		+
		"S"
		+
		"</FONT></TT>";

		}

		

		t1 
		= 
		z0 %
		10;

		if
		( 
		t1 ==
		0
		)
		{

		return
		'<TT><FONT COLOR="#330000">'
		+
		"0"
		+
		"</FONT></TT>";

		}

		if
		( 
		t1 ==
		1
		)
		{

		return
		'<TT><FONT COLOR="#663300">'
		+
		"1"
		+
		"</FONT></TT>";

		}

		if
		( 
		t1 ==
		2
		)
		{

		return
		'<TT><FONT COLOR="#CC6600">'
		+
		"2"
		+
		"</FONT></TT>";

		}

		if
		( 
		t1 ==
		3
		)
		{

		return
		'<TT><FONT COLOR="#FF9900">'
		+
		"3"
		+
		"</FONT></TT>";

		}

		if
		( 
		t1 ==
		4
		)
		{

		return
		'<TT><FONT COLOR="#FFCC00">'
		+
		"4"
		+
		"</FONT></TT>";

		}

		if
		( 
		t1 ==
		5
		)
		{

		return
		'<TT><FONT COLOR="#FFCC99">'
		+
		"5"
		+
		"</FONT></TT>";

		}

		if
		( 
		t1 ==
		6
		)
		{

		return
		'<TT><FONT COLOR="#FFFF00">'
		+
		"6"
		+
		"</FONT></TT>";

		}

		if
		( 
		t1 ==
		7
		)
		{

		return
		'<TT><FONT COLOR="#33FF33">'
		+
		"7"
		+
		"</FONT></TT>";

		}

		if
		( 
		t1 ==
		8
		)
		{

		return
		'<TT><FONT COLOR="#009900">'
		+
		"8"
		+
		"</FONT></TT>";

		}

		if
		( 
		t1 ==
		9
		)
		{

		return
		'<TT><FONT COLOR="#003300">'
		+
		"9"
		+
		"</FONT></TT>";

		   
		}

		}

		

		function 
		frac( 
		x0, 
		y0, 
		x2, 
		y2, 
		z0, 
		z1, 
		z2, 
		z3 )
		{

		var 
		newz, 
		xmid, 
		ymid, 
		z01, 
		z12, 
		z23, 
		z30;

		//  50% chance rise or descend

		if
		(
		Math.random()
		<
		0.5
		)
		{

		newz 
		=
		Math.round(
		(z0+z1+z2+z3)
		/
		4)
		+
		Math.round(
		Math.random()
		*
		(y2-y0)
		* 
		steep );

		}

		else
		{

		newz 
		=
		Math.round(
		(z0+z1+z2+z3)
		/
		4)
		-
		Math.round(
		Math.random()
		*
		(y2-y0)
		* 
		steep );

		}

		

		xmid 
		=
		( 
		x0 + 
		x2)
		>>
		1;

		ymid 
		=
		( 
		y0 + 
		y2)
		>>
		1;

		z12 
		= 
		( 
		z1 + 
		z2)
		>>
		1;

		z30 
		= 
		( 
		z3 + 
		z0)
		>>
		1;

		z01 
		= 
		( 
		z0 + 
		z1)
		>>
		1;

		z23 
		= 
		( 
		z2 + 
		z3)
		>>
		1;

		

		if
		(
		(( 
		x2 - 
		x0 )
		> 
		WIDTH )
		&&
		(( 
		y2 - 
		y0 )
		> 
		WIDTH ))
		{

		frac( 
		x0, 
		y0, 
		xmid, 
		ymid, 
		z0, 
		z01, 
		newz, 
		z30);

		frac( 
		xmid, 
		y0, 
		x2, 
		ymid, 
		z01, 
		z1, 
		z12, 
		newz);

		frac( 
		x0, 
		ymid, 
		xmid, 
		y2, 
		z30, 
		newz, 
		z23, 
		z3);

		frac( 
		xmid, 
		ymid, 
		x2, 
		y2, 
		newz, 
		z12, 
		z2, 
		z23);

		}

		else
		{

		if
		( 
		newz <= 
		sealevel )
		{

		// above sea level

		picType[ymid*YB+xmid]
		=
		"l";

		pic[ymid*YB+xmid]
		= 
		newz;

		}

		else
		{

		//  below "sea level"

		picType[ymid*YB+xmid]
		=
		"s";

		pic[ymid*YB+xmid]
		= 
		LEVEL_WATER;

		      
		}

		   
		}

		}

		

		

		function 
		landscape()
		{

		

		for
		(var 
		i =
		0; 
		i < 
		XB; 
		i++)
		{

		for
		(var 
		j =
		0; 
		j < 
		YB; 
		j++)
		{

		picType[j*YB+i]
		=
		"u";

		   
		}

		}

		for
		(var 
		i =
		0; 
		i < 
		XB; 
		i++)
		{

		for
		(var 
		j =
		0; 
		j < 
		YB; 
		j++)
		{

		pic[j*YB+i]
		= 
		LEVEL_UNDEFINED;

		   
		}

		}

		

		steep 
		=
		(
		Math.random()
		/
		2.5
		)
		+
		0.5;

		sealevel 
		=
		Math.round(
		17
		*
		Math.random()
		)
		-
		8;

		

		Z1 
		=
		Math.round(
		15
		*
		Math.random()
		)
		-
		7;

		Z2 
		=
		Math.round(
		15
		*
		Math.random()
		)
		-
		7;

		Z3 
		=
		Math.round(
		15
		*
		Math.random()
		)
		-
		7;

		Z4 
		=
		Math.round(
		15
		*
		Math.random()
		)
		-
		7;

		

		frac( 
		XA, 
		YA, 
		XB, 
		YB, 
		Z1, 
		Z2, 
		Z3, 
		Z4);

		

		for
		(var 
		i =
		0; 
		i < 
		XB; 
		i++)
		{

		for
		(var 
		j =
		0; 
		j < 
		YB; 
		j++)
		{

		pic0 
		= 
		LEVEL_UNDEFINED;

		if
		( 
		picType[j*YB+i]
		==
		"l"
		) 
		{

		pic0 
		=
		Math.abs(pic[j*YB+i]
		- 
		sealevel);

		}

		if
		( 
		picType[j*YB+i]
		==
		"s"
		) 
		{

		pic0 
		= 
		LEVEL_WATER;

		}

		buf2 
		= 
		buf2 + 
		ZColor( 
		pic0 )
		+
		" ";

		}

		buf2 
		= 
		buf2 +
		"<BR>";

		}

		return 
		buf2;

		}

		//  End -->

		</script>

		<table
		bgcolor=white><tr><td>

		<table 
		bgcolor=black><tr><td>

		

		<script
		language="JavaScript">

		<!--

		document.write
		( 
		landscape()
		);

		// -->

		</script>

		

		</td></tr></table>

		</td></tr></table>