working on panning, currently kinda glitchy

src/3dModels/CameraControls/OrbitCameraControls.tsx

@@ -1,5 +1,6 @@
 import { useThree } from "@react-three/fiber";
 import { useEffect, useRef } from "react";
+import { Plane, Raycaster, Vector2, Vector3 } from "three";
 
 interface CameraTarget {
     x: number;
@@ -25,8 +26,18 @@ interface Props {
 export default function OrbitCameraControls(props: Props) {
     const { target, clampVerticalRotation, minPhi = 0.01, maxPhi = Math.PI - 0.01 } = props;
     const { camera, gl } = useThree();
+    const panPlane = useRef(new Plane());
+    const panStartPoint = useRef(new Vector3());
+    const raycaster = useRef(new Raycaster());
+    const mouse = useRef(new Vector2());
+    const targetRef = useRef({
+        x: target?.x ?? 0,
+        y: target?.y ?? 0,
+        z: target?.z ?? 0,
+    });
 
     const isDragging = useRef(false);
+    const isPanning = useRef(false);
     const lastPos = useRef({ x: 0, y: 0 });
 
     // Spherical coords
@@ -38,7 +49,7 @@ export default function OrbitCameraControls(props: Props) {
 
     useEffect(() => {
         const canvas = gl.domElement;
-
+        canvas.addEventListener("contextmenu", e => e.preventDefault());
         const updateCamera = () => {
             const { radius, theta, phi } = spherical.current;
 
@@ -47,41 +58,111 @@ export default function OrbitCameraControls(props: Props) {
             const z = radius * Math.sin(phi) * Math.cos(theta);
 
             camera.position.set(x, y, z);
-            camera.lookAt(target?.x ?? 0, target?.y ?? 0, target?.z ?? 0);
+            camera.lookAt(
+                targetRef.current.x,
+                targetRef.current.y,
+                targetRef.current.z
+            );
         };
 
         updateCamera();
 
         const handleMouseDown = (e: MouseEvent) => {
             if (e.target !== canvas) return;
-            isDragging.current = true;
+        
             lastPos.current = { x: e.clientX, y: e.clientY };
+        
+            // Left click = rotate
+            if (e.button === 0) {
+                isDragging.current = true;
+                isPanning.current = false;
+            }
+        
+            // Right click = pan
+            if (e.button === 2) {
+                isPanning.current = true;
+                isDragging.current = false;
+
+                // plane facing camera through target
+                const camDir = new Vector3();
+                camera.getWorldDirection(camDir);
+            
+                panPlane.current.setFromNormalAndCoplanarPoint(
+                    camDir,
+                    new Vector3(
+                        targetRef.current.x,
+                        targetRef.current.y,
+                        targetRef.current.z
+                    )
+                );
+            
+                // starting intersection point
+                raycaster.current.setFromCamera(
+                    new Vector2(
+                        (e.clientX / window.innerWidth) * 2 - 1,
+                        -(e.clientY / window.innerHeight) * 2 + 1
+                    ),
+                    camera
+                );
+            
+                raycaster.current.ray.intersectPlane(
+                    panPlane.current,
+                    panStartPoint.current
+                );
+            }
         };
 
-        const handleMouseMove = (e: MouseEvent) => {
-            if (!isDragging.current) return;
         
+
+        const handleMouseMove = (e: MouseEvent) => {
             const deltaX = e.clientX - lastPos.current.x;
             const deltaY = e.clientY - lastPos.current.y;
         
+            // ROTATE
+            if (isDragging.current) {
                 spherical.current.theta -= deltaX * 0.005;
                 spherical.current.phi -= deltaY * 0.005;
         
-            // Clamp vertical rotation (prevents flipping)
                 if (clampVerticalRotation) {
                     spherical.current.phi = Math.max(
                         minPhi,
                         Math.min(maxPhi, spherical.current.phi)
                     );
                 }
+            }
+        
+            // PAN
+            if (isPanning.current) {
+                const raycaster = new Raycaster();
+            
+                mouse.current.x = (e.clientX / window.innerWidth) * 2 - 1;
+                mouse.current.y = -(e.clientY / window.innerHeight) * 2 + 1;
+            
+                raycaster.setFromCamera(mouse.current, camera);
+            
+                const currentPoint = new Vector3();
+            
+                raycaster.ray.intersectPlane(panPlane.current, currentPoint);
+            
+                const delta = new Vector3().subVectors(
+                    panStartPoint.current,
+                    currentPoint
+                );
+            
+                targetRef.current.x += delta.x;
+                targetRef.current.y += delta.y;
+                targetRef.current.z += delta.z;
+            
+                panStartPoint.current.copy(currentPoint);
+            }
         
             lastPos.current = { x: e.clientX, y: e.clientY };
-
             updateCamera();
         };
 
         const handleMouseUp = () => {
             isDragging.current = false;
+            isPanning.current = false;
         };
 
         const handleWheel = (e: WheelEvent) => {