Created
February 28, 2017 08:15
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old JS landscape generatror
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| <HEAD><SCRIPT LANGUAGE="JavaScript"> | |
| <!-- Begin | |
| var WIDTH = 1; | |
| var XA = 0; | |
| var XB = 64; | |
| var YA = 0; | |
| var YB = 64; | |
| 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">' + "▉" + "</FONT></TT>"; | |
| } | |
| if ( z0 == LEVEL_UNDEFINED ) { | |
| return '<TT><FONT COLOR="#000099">' + "▉" + "</FONT></TT>"; | |
| } | |
| t1 = z0 % 10; | |
| if ( t1 == 0 ) { | |
| return '<TT><FONT COLOR="#330000">' + "▉" + "</FONT></TT>"; | |
| } | |
| if ( t1 == 1 ) { | |
| return '<TT><FONT COLOR="#663300">' + "▉" + "</FONT></TT>"; | |
| } | |
| if ( t1 == 2 ) { | |
| return '<TT><FONT COLOR="#CC6600">' + "▉" + "</FONT></TT>"; | |
| } | |
| if ( t1 == 3 ) { | |
| return '<TT><FONT COLOR="#FF9900">' + "▉" + "</FONT></TT>"; | |
| } | |
| if ( t1 == 4 ) { | |
| return '<TT><FONT COLOR="#FFCC00">' + "▉" + "</FONT></TT>"; | |
| } | |
| if ( t1 == 5 ) { | |
| return '<TT><FONT COLOR="#FFCC99">' + "▉" + "</FONT></TT>"; | |
| } | |
| if ( t1 == 6 ) { | |
| return '<TT><FONT COLOR="#FFFF00">' + "▉" + "</FONT></TT>"; | |
| } | |
| if ( t1 == 7 ) { | |
| return '<TT><FONT COLOR="#33FF33">' + "▉" + "</FONT></TT>"; | |
| } | |
| if ( t1 == 8 ) { | |
| return '<TT><FONT COLOR="#009900">' + "▉" + "</FONT></TT>"; | |
| } | |
| if ( t1 == 9 ) { | |
| return '<TT><FONT COLOR="#003300">' + "▉" + "</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> | |
| <style> | |
| TT{width:15px;height:15px;display:inline-block;} | |
| </style> | |
| </HEAD> | |
| <body> | |
| <table bgcolor=black><tr><td> | |
| <script language="JavaScript"> | |
| <!-- | |
| document.write ( landscape() ); | |
| // --> | |
| </script> | |
| </td></tr></table></body> |
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