cleanup and performance improvements

.gitignore

@@ -1,3 +1,7 @@
 node_modules
 build/potree_server/potree_server.log
 package-lock.json
+testcloud.txt
+log.txt
+test.las
+teststream.txt

src/LASHeader.js

@@ -0,0 +1,96 @@
+
+class LASHeader{
+
+	constructor(){
+		this.versionMajor = 1;
+		this.versionMinor = 2;
+		this.headerSize = 227;
+		this.pointDataFormat = 2;
+		this.pointDataRecordLength = 26;
+		this.numPoints = 0;
+		this.scale = 0.001;
+		this.offset = [0, 0, 0];
+		this.min = [0, 0, 0];
+		this.max = [0, 0, 0];
+	}
+
+	toBuffer(){
+		let buffer = Buffer.from(new Uint8Array(227));
+
+		let fileSignature = "LASF";
+		buffer[0] = fileSignature.charCodeAt(0);
+		buffer[1] = fileSignature.charCodeAt(1);
+		buffer[2] = fileSignature.charCodeAt(2);
+		buffer[3] = fileSignature.charCodeAt(3);
+
+		// buffer[4-5] file source id
+		// buffer[6-7] global encoding
+		// buffer[8-11] project id guid data 1
+		// buffer[8-11] project id guid data 1
+		// buffer[12-13] project id guid data 1
+		// buffer[14-15] project id guid data 1
+		// buffer[16-23] project id guid data 1
+
+		// version major
+		buffer[24] = this.versionMajor;
+
+		// version minor
+		buffer[25] = this.versionMinor;
+
+		//buffer[26-57] system identifier
+		//buffer[58-89] generating software
+		//buffer[90-61] creation day of year
+		//buffer[92-93] creation year
+
+		// header size
+		buffer.writeUInt16LE(this.headerSize, 94);
+
+		// offset to point data
+		buffer.writeUInt32LE(this.headerSize, 96);
+
+		// num VLRs
+		buffer.writeUInt32LE(0, 100);
+
+		// point data format
+		buffer[104] = this.pointDataFormat;
+
+		// point data record length
+		buffer.writeUInt16LE(this.pointDataRecordLength, 105);
+
+		// num points
+		buffer.writeUInt32LE(this.numPoints, 107);
+
+		// number of points by return
+		buffer.writeUInt32LE(this.numPoints, 111);
+		buffer.writeUInt32LE(0, 115);
+		buffer.writeUInt32LE(0, 119);
+		buffer.writeUInt32LE(0, 123);
+		buffer.writeUInt32LE(0, 127);
+
+		// scale factors
+		buffer.writeDoubleLE(this.scale, 131);
+		buffer.writeDoubleLE(this.scale, 139);
+		buffer.writeDoubleLE(this.scale, 147);
+
+		// offsets
+		buffer.writeDoubleLE(this.offset[0], 155);
+		buffer.writeDoubleLE(this.offset[1], 163);
+		buffer.writeDoubleLE(this.offset[2], 171);
+
+		// bounding box [max x, min x, y, y, z, z]
+		buffer.writeDoubleLE(this.max[0], 179);
+		buffer.writeDoubleLE(this.min[0], 187);
+		buffer.writeDoubleLE(this.max[1], 195);
+		buffer.writeDoubleLE(this.min[1], 203);
+		buffer.writeDoubleLE(this.max[2], 211);
+		buffer.writeDoubleLE(this.min[2], 219);
+
+		return buffer;
+	}
+
+}
+
+
+
+
+module.exports.LASHeader = LASHeader;

src/Vector3.js

@@ -35,6 +35,10 @@ class Vector3{
 		return new Vector3(this.x, this.y, this.z);
 	}
 
+	toArray(){
+		return [this.x, this.y, this.z];
+	}
+
 };
 
 module.exports.Vector3 = Vector3;