From fb5add1b17c40919a913d280758966b758601641 Mon Sep 17 00:00:00 2001
From: davidpkj <davidpenkow1@gmail.com>
Date: Tue, 13 Dec 2022 15:03:29 +0100
Subject: Add: physics

---
 src/collisionCaster.ts | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 src/collisionCaster.ts

diff --git a/src/collisionCaster.ts b/src/collisionCaster.ts
new file mode 100644
index 0000000..e37ecbd
--- /dev/null
+++ b/src/collisionCaster.ts
@@ -0,0 +1,39 @@
+import * as THREE from "three";
+
+const calculateDistanceFromRay = (ray: THREE.Raycaster, clips: Array<THREE.Object3D>) => {
+  const intersected = ray.intersectObjects(clips, true);
+
+  if (intersected.length > 0) return parseFloat(intersected[0].distance.toPrecision(3));
+
+  return 0;
+}
+
+export class CollisionCaster {
+  private _position: THREE.Vector3;
+  private _length: number;
+  private _clips: Array<THREE.Object3D>;
+
+  up: Number;
+  down: Number;
+  /*
+  front: Number;
+  behind: Number;
+  right: Number;
+  left: Number;
+  */
+
+  constructor(position, length, clips) {
+    this._position = position;
+    this._length = length;
+    this._clips = clips;
+
+    this.up = calculateDistanceFromRay(new THREE.Raycaster(this._position, new THREE.Vector3(0, 1, 0), 0, this._length), this._clips);
+    this.down = calculateDistanceFromRay(new THREE.Raycaster(this._position, new THREE.Vector3(0, -1, 0), 0, this._length), this._clips);
+    /*
+    this.front = calculateDistanceFromRay(new THREE.Raycaster(this._position, new THREE.Vector3(0, -1, 0), 0, this._length), clips);
+    this.behind = calculateDistanceFromRay(new THREE.Raycaster(this._position, new THREE.Vector3(0, -1, 0), 0, this._length), clips);
+    this.right = calculateDistanceFromRay(new THREE.Raycaster(this._position, new THREE.Vector3(0, -1, 0), 0, this._length), clips);
+    this.left = calculateDistanceFromRay(new THREE.Raycaster(this._position, new THREE.Vector3(0, -1, 0), 0, this._length), clips);
+    */
+  }
+}
-- 
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