JS1k: The JavaScript code golfing competition

for(_='c[c.~~fy]=|)}zon`z;`dr_25^/^Wx[iW]VJSON.Ur[nLreK&&Ifor(He(G+1E],C){B];^*Math.:floor(b.pagedatafc #=0;;i+=^)H,1functi`(bB~ta](0,G{x2,=^2==~gg](),~fc](Ct==s?itt<w;t+=aba234 #	).[2]);random()Hii<h==bI=b.pKventDefault()|A[^)V[tW]
Hi in c)c[i[0]+i[6]]=i;r=[--4,6,8,-6,4-6,68,-4,4,2-3A="#f4edc4 #73de5fca	4ac2	36bddfd995".split(" "w=a.width;h=a.height;`click=(Bx=[-12V=[C
tEiE2?0:1;open(":text/js`;,"+Ustringify(x)z;6w,h Gb,d,gBif(4!=bBc.savGd.x,d.yb?(1^,02^,^3^c.rotatG1.57*b)):(7C^,^)po=3.14*(1.5+.5*bvar k=d.xE2+cos(pol=d.yE2+sin(popk,l;0,,2Hmm<(2==b?4:3B2mHnn<r.length;)pILCLECL+2C2n+=3;m++}~K](GbE,d,g!pIgIkWylWz,0z};i+=10)Hs=1,10)2:i-12|.2>?A[1]:A[4-2:i-42s*=-1;`mousemove=XWyYWz_op;f=b.Transfer.files[0v=new FileReader;v.`load=(BKturn x=UparsGb.target.Ksult
I:t,y:i}z}(fv.KadAsText(f_agover};';G=/[^ -ADFJM-TX-\]a-y{}]/.exec(_);)with(_.split(G))_=join(shift());eval(_)

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

r = [0, -2, 2, 2, -4, 6, 8, -6, 4, 12, -6, 6, 18, -4, 4, 22, -2, 3];
    z = ['#f4edc4', '#73defc', '#5fcafc', '#aba234', '#4ac2fc', '#aba234', '#36bdfc', '#dfd995'];
     //z = water blending was l1
     //x = load and save array
     //y = land function
     //v = reader
     //r = land shading
     //t,i, m,n= loops

    w = a.width;
    h = a.height;

    onclick = function() {
    	x = [];
    	for (i = 0; i < h - 12; i += 25) {
    		x[i / 25] = [];
    		for (t = 0; t < w; t += 25) {
    			x[i / 25][t / 25] = c.getImageData(t + 12, i + 12, 1, 1).data[2] == 252 ? 0 : 1;
    		}
    	}
    	open('data:text/json;,' + JSON.stringify(x));
    }

     //draw water color
    c.fillStyle = z[6];
    c.fillRect(0, 0, w, h);
     ////

    function y(recursion, s, recur) {
    	if (recursion == 4) return;
    	c.save();
    	c.translate(s.x, s.y);
    	if (!recursion) {
    		c.fillStyle = z[7];
    		c.fillRect(0, 0, 25, 25);
    	} else {
    		if (recursion == 1) c.translate(25, 0); //right 
    		if (recursion == 2) c.translate(25, 25); //bottom 
    		if (recursion == 3) c.translate(0, 25); //left 
    		c.rotate((3.14 * (recursion * .5)));
    	}

    	po = 3.14 * (1.5 + (recursion * .5));
    	var Mx = (s.x + 12) + 25 * Math.cos(po);
    	var My = (s.y + 12) + 25 * Math.sin(po);
    	var check = c.getImageData(Mx, My, 1, 1).data[2] == 252; //check neighboring tile for water

    	c.fillStyle = z[0]; ///sand spots
    	c.fillRect(Math.random() * 25, Math.random() * 25, 2, 2); ///sand spots
    	m = 0;

    	while (m < (recursion == 2 ? 4 : 3)) { //how much shading
    		c.translate(0, 2);
    		c.fillStyle = z[m];
    		n = 0
    		while (n < r.length) {
    			if (check) {
    				c.fillRect(r[n], r[n + 1], r[n + 2], 2);
    			} //draw transition if water is neighbor
    			n += 3;
    		}
    		m++;
    	}
    	c.restore();

    	y(recursion + 1, s, recur); ///continue recursion on current for all sides

    	if (!check && recur) {
    		y(0, {
    			x: Math.floor(Mx / 25) * 25,
    			y: Math.floor(My / 25) * 25
    		}, 0)
    	} ///recur for neighbor tile
    }



     /////static waves
    for (i = 0; i < h; i += 10) {
    	s = 1;
    	for (t = 0; t < w; t += 10) {
    		c.fillStyle = z[2];
    		c.fillRect(t, (s == 1 ? i : i - 2), 10, 2);
    		c.fillStyle = Math.random() * 25 < .2 ? z[1] : z[4]; //random white caps
    		c.fillRect(t, (s == 1 ? i - 2 : i - 4), 10, 2);
    		s *= -1;
    	}
    }
     ////

    onmousemove = function(e) {

    	y(0, {
    		x: Math.floor(e.pageX / 25) * 25,
    		y: Math.floor(e.pageY / 25) * 25
    	}, 1); //draw based on 25 pixel tile

    }
     //load file, no space for checking valid file
    ondrop = function(e) {
    	e.preventDefault();
    	f = e.dataTransfer.files[0];
    	v = new FileReader();
    	v.onload = (function(filein) {
    		return function(e) {
    			x = JSON.parse(e.target.result);
    			for (i = 0; i < h; i += 25) {
    				for (t = 0; t < w; t += 25) {
    					if (x[i / 25][t / 25]) y(0, {
    						x: t,
    						y: i
    					}, 1);
    				}
    			}
    		};
    	})(f);
    	v.readAsText(f);
    }

    ondragover = function(e) {
    	e.preventDefault();
    }