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« on: May 31, 2013, 08:36:40 PM »
I've been asked for this before, and since I don't even mod for blockland anymore I thought it might be a nice little thing to give out.
yeah
so basically you have the global variables that define the max height and the min height (not even sure if those work, never cared to look, it looks like it works). I never really forgeted with the quality, so you can just leave that.
it is super 100% the hardest thing in the world. it takes so much time and effort to generate a single chunk it's not even funny
getsimplexZ(%x,%y) ==> z
Made for simplicity and fun. I know about the little glitch about certain threads of terrain being a little off. I fixed it on my old comp but lost that. iirc changing the numbers in the perm. table fixed it.
oh yeah the code.
Save this as simplex.cs
exec("./simplex2.cs");
$Terragen::Max = 64;
$Terragen::Min = 0;
$Terragen::Quality = 256 / 2;
function strToSeed(%str)
{
%abc = "abcdefghijklmnopqrstuvwxyz";
%abc = %abc @ strUpr(%abc);
%abc = %abc @ "`1234567890-=~!@#$%^&*()_+[]\\;',./{}|:\"<>? ";
%seed = "0.";
for(%i=0;%i<strLen(%str);%i++)
{
%letter = getSubStr(%str,%i,%i);
%pos = strPos(%abc,%letter);
if(%pos == -1)
%pos = getRandom(0,strLen(%abc));
%seed = %seed @ %pos;
}
if(trim(%seed) $= "")
%seed = getRandom() @ "2";
else
%seed = %seed @ "2";
return %seed;
}
function getMasterSimplex()
{
if(!isObject($simplexMaster))
{
talk("Creating Terrain Master");
$simplexMaster = new ScriptObject()
{
seed = strToSeed("i like to eat");
quality = $Terragen::Quality;
max = $Terragen::Max;
min = $Terragen::Min;
};
}
return $simplexMaster;
}
function getsimplexZ(%x,%y)
{
%simplex = getMastersimplex();
if(%simplex.gen[%x,%y] !$= "")
{
return %simplex.gen[%x,%y];
}
%seed = %simplex.seed;
%quality = %simplex.quality;
%z = 0;
%delta = %quality + %seed;
%noise = snoise((%x / %seed) / %delta, (%y / %seed) / %delta,%z);
%noise = (%noise + 1 ) / 2 * (%simplex.max - %simplex.min) + %simplex.min;
%simplex.gen[%x,%y] = %noise;
return %noise;
}
save this as simplex2.cs
%list = "151\t160\t137\t91\t90\t15\t131\t13\t201\t95\t96\t53\t194\t233\t7\t225\t140\t36" TAB
"103\t30\t69\t142\t8\t99\t37\t240\t21\t10\t23\t190\t6\t148\t247\t120\t234\t75\t0" TAB
"26\t197\t62\t94\t252\t219\t203\t117\t35\t11\t32\t57\t177\t33\t88\t237\t149\t56" TAB
"87\t174\t20\t125\t136\t171\t168\t68\t175\t74\t165\t71\t134\t139\t48\t27\t166" TAB
"77\t146\t158\t231\t83\t111\t229\t122\t60\t211\t133\t230\t220\t105\t92\t41\t55" TAB
"46\t245\t40\t244\t102\t143\t54\t65\t25\t63\t161\t1\t216\t80\t73\t209\t76\t132" TAB
"187\t208\t89\t18\t169\t200\t196\t135\t130\t116\t188\t159\t86\t164\t100\t109" TAB
"198\t173\t186\t3\t64\t52\t217\t226\t250\t124\t123\t5\t202\t38\t147\t118\t126" TAB
"255\t82\t85\t212\t207\t206\t59\t227\t47\t16\t58\t17\t182\t189\t28\t42\t223\t183" TAB
"170\t213\t119\t248\t152\t2\t44\t154\t163\t70\t221\t153\t101\t155\t167\t43\t172" TAB
"9\t129\t22\t39\t253\t19\t98\t108\t110\t79\t113\t224\t232\t178\t185\t112\t104" TAB
"218\t246\t97\t228\t251\t34\t242\t193\t238\t210\t144\t12\t191\t179\t162\t241" TAB
"81\t51\t145\t235\t249\t14\t239\t107\t49\t192\t214\t31\t181\t199\t106\t157\t184" TAB
"84\t204\t176\t115\t121\t50\t45\t127\t4\t150\t254\t138\t236\t205\t93\t222\t114" TAB
"67\t29\t24\t72\t243\t141\t128\t195\t78\t66\t215\t61\t156\t180";
// Store permutation array from the precomputed permutations.
for(%i = 0; %i < 256; %i++) {
%field = getField(%list, %i);
$Simplex::P[%i] = %field;
$Simplex::P[256 + %i] = %field;
}
function lerp(%t, %a, %b)
{
return %a + %t * (%b - %a);
}
function fade(%t)
{
return %t * %t * %t * (%t * (%t * 6 - 15) + 10);
}
function grad(%hash,%x,%y,%z)
{
%h = %hash & 15;
%u = %h < 8 ? %x : %y;
%v = %h < 4 ? %y : %h == 12 || %h == 14 ? %x : %z;
return ((%h & 1) == 0 ? %u : -%u) + ((%h & 2) == 0 ? %v : -%v);
}
function snoise(%x,%y,%z)
{
%floopX = mFloor(%x) & 255;
%floopY = mFloor(%y) & 255;
%floopZ = mFloor(%z) & 255;
%x -= mFloor(%x);
%y -= mFloor(%y);
%z -= mFloor(%z);
%u = fade(%x);
%v = fade(%y);
%w = fade(%z);
%a = $Simplex::P[%floopX] + %floopY;
%aa = $Simplex::P[%a] + %floopZ;
%ab = $Simplex::P[%a + 1] + %floopZ;
%b = $Simplex::P[%floopX + 1] + %floopY;
%ba = $Simplex::P[%b] + %floopZ;
%bb = $Simplex::P[%b + 1] + %floopZ;
%pAA = $Simplex::P[%aa];
%pAB = $Simplex::P[%ab];
%pBA = $Simplex::P[%ba];
%pBB = $Simplex::P[%bb];
%pAA1 = $Simplex::P[%aa + 1];
%pBA1 = $Simplex::P[%ba + 1];
%pBB1 = $Simplex::P[%bb + 1];
%gradAA = grad(%pAA,%x,%y,%z);
%gradBA = grad(%pBA, %x-1,%y,%z);
%gradAB = grad(%pAB,%x,%y-1,%z);
%gradBB = grad(%pBB,%x-1,%y-1,%z);
%gradAA1 = grad(%pAA1,%x,%y,%z-1);
%gradBA1 = grad(%pBA1,%x-1,%y,%z-1);
%gradAB1 = grad(%pAB1,%x,%y-1,%z-1);
%gradBB1 = grad(%pBB1,%x-1,%y-1,%z-1);
return lerp(%w,
lerp(%v, lerp(%u, %gradAA, %gradBA), lerp(%u, %gradAB, %gradBB)),
lerp(%v, lerp(%u, %gradAA1, %gradBA1), lerp(%u,%gradAB1,%gradBB1))
);
}
Right, so just execute simplex.cs and you are good.
oh yeah and I have that weird strtoseed thing. Don't know if it works so if you figure out if it does / doesn't then post.
if you use this, pls give me credit. thanks ;).
I have also written this in some other languages. The next post has those
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