Merge pull request #709 from matiasmantinan/add-jet-origin

misc (event-display): Add jet origin

Author: EdwardMoyse

guides/users.md

@@ -192,6 +192,7 @@ Jets are a list of Jet objects with the following attributes :
 * `energy`, `et` (opt) - energy of the Jets, used to set its length
 * `coneR` (opt) - the radius of the jet cone. If not given, radius is 10% of the length
 * `color` (opt) - Hexadecimal string representing the color to draw the jet.
+* `origin_X`, `origin_Y`, `origin_Z` (opt) - Origin of the jet
 
 #### 'Hits'
 Hits can be defined in 2 ways. Either as an array of positions or as an array of Hit objects.

packages/phoenix-event-display/src/loaders/objects/phoenix-objects.ts

@@ -208,15 +208,23 @@ export class PhoenixObjects {
     // Jet energy parameter can either be 'energy' or 'et'
     const length = (jetParams.energy ? jetParams.energy : jetParams.et) * 0.2;
 
+    // Add displacement of the origin of the jet
+    // If x is given else jet is at origin
+    const origin_X = jetParams.origin_X ? jetParams.origin_X : 0;
+    // If y is given else jet is at origin
+    const origin_Y = jetParams.origin_Y ? jetParams.origin_Y : 0;
+    // If z is given else jet is at origin
+    const origin_Z = jetParams.origin_Z ? jetParams.origin_Z : 0;
+
     const sphi = Math.sin(phi);
     const cphi = Math.cos(phi);
     const stheta = Math.sin(theta);
     const ctheta = Math.cos(theta);
     //
     const translation = new Vector3(
-      0.5 * length * cphi * stheta,
-      0.5 * length * sphi * stheta,
-      0.5 * length * ctheta,
+      0.5 * length * cphi * stheta + origin_X,
+      0.5 * length * sphi * stheta + origin_Y,
+      0.5 * length * ctheta + origin_Z,
     );
 
     const width = jetParams.coneR