3D Spatial hash

Developer
Sarah Cartwright
Size
2,084 Kb
Views
4,048
  1. 3D Spatial hash Previews
  2. 3D Spatial hash HTML Codes
  3. 3D Spatial hash CSS Codes
  4. 3D Spatial hash JS Codes

How do I make an 3d spatial hash?

What is a 3d spatial hash? How do you make a 3d spatial hash? This script and codes were developed by Sarah Cartwright on 05 December 2022, Monday.

3D Spatial hash Previews
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3D Spatial hash - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>3D Spatial hash</title> <link rel="stylesheet" href="css/style.css">
</head>
<body> This Pen does nothing on its own - it is used in other pens. <script src="js/index.js"></script>
</body>
</html>

3D Spatial hash - Script Codes CSS Codes

body { padding: 10px; margin: 0px; background: #2e2e2e; color: #909090; font: 12px arial, sans-serif;
}

3D Spatial hash - Script Codes JS Codes

function spatialHash(cellSize){ this.cellSize = cellSize; this.bucket = []; // Yay for very sparse arrays.
}
spatialHash.prototype.hash3D = function(x, y, z){ var ix = Math.floor((x+1000)/this.cellSize), iy = Math.floor((y+1000)/this.cellSize), iz = Math.floor((z+1000)/this.cellSize); return ((ix * 73856093) ^ (iy * 19349663) ^ (iz * 83492791) ); //% 5000; //5000 is size of hash table.
}
spatialHash.prototype.add = function(x, y, z, obj){ var hash = this.hash3D(x, y, z); if(this.bucket[hash]===undefined) this.bucket[hash] = [obj]; else this.bucket[hash].push(obj);
}
spatialHash.prototype.clear = function(){ this.bucket = [];
}
spatialHash.prototype.getLocal = function(x, y, z){ var nearObjects = []; var o = this.cellSize; for(var xx=-o*2; xx<o*2+o; xx+=o) for(var yy=-o*2; yy<o*2+o; yy+=o) for(var zz=-o*2; zz<o*2+o; zz+=o){ var newObjects = this.bucket[this.hash3D(x+xx, y+yy, z+zz)]; if(newObjects !== undefined) nearObjects = nearObjects.concat(newObjects); } return nearObjects;
}
/*
console.clear();
var SH = new spatialHash(5);
for(var i=0; i<30; i+=2){ SH.add(i,2,3,"TEST"+i);
}
console.log(SH.getLocal(10,2,2));
SH.clear();
console.log(SH.getLocal(17,2,2));
*/
3D Spatial hash - Script Codes
3D Spatial hash - Script Codes
Home Page Home
Developer Sarah Cartwright
Username SarahC
Uploaded December 05, 2022
Rating 3
Size 2,084 Kb
Views 4,048
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