refactor(lasParser): remove import coord

Author: ftoromanoff

src/Parser/LASLoader.js

@@ -1,6 +1,6 @@
 import { LazPerf } from 'laz-perf';
 import { Las } from 'copc';
-import Coordinates from 'Core/Geographic/Coordinates';
+import proj4 from 'proj4';
 
 /**
  * @typedef {Object} Header - Partial LAS header.
@@ -75,30 +75,25 @@ class LASLoader {
         */
         const scanAngles = new Float32Array(view.pointCount);
 
-        const coord = new Coordinates(options.crsIn, 0, 0, 0);
-        const coordProj = new Coordinates(options.crsOut, 0, 0, 0);
-
+        const projection = proj4.defs(options.crsOut);
         for (let i = 0; i < view.pointCount; i++) {
             // `getPosition` apply scale and offset transform to the X, Y, Z
             // values. See https://github.com/connormanning/copc.js/blob/master/src/las/extractor.ts.
             const [x, y, z] = getPosition.map(f => f(i));
             positions[i * 3] = x;
             positions[i * 3 + 1] = y;
             positions[i * 3 + 2] = z;
+            elevations[i] = z;
 
+            if (projection) {
             // Calculate positions on view.crs
-            coord.setFromValues(
-                positions[i * 3],
-                positions[i * 3 + 1],
-                positions[i * 3 + 2],
-            );
-            coord.as(options.crsOut, coordProj);
-            positionsProj[i * 3] = coordProj.x;
-            positionsProj[i * 3 + 1] = coordProj.y;
-            positionsProj[i * 3 + 2] = coordProj.z;
-            elevations[i] = coordProj.z;
-            // geocentric height to elevation
-            if (options.crsOut === 'EPSG:4978') { elevations[i] = positions[i * 3 + 2]; }
+                const [xProj, yProj, zProj] = proj4(options.crsIn, options.crsOut).forward([x, y, z]);
+                positionsProj[i * 3] = xProj;
+                positionsProj[i * 3 + 1] = yProj;
+                positionsProj[i * 3 + 2] = zProj;
+                // geocentric height to elevation
+                if (projection.projName !== 'geocent') { elevations[i] = zProj; }
+            }
 
             intensities[i] = getIntensity(i);
             returnNumbers[i] = getReturnNumber(i);