From f3525b1317ae7e22b64a305e13f8fd70e483833c Mon Sep 17 00:00:00 2001
From: Zach Fox <3409031+zfox23@users.noreply.github.com>
Date: Mon, 23 Sep 2024 17:15:11 -0400
Subject: [PATCH] Layout fixes; dynamic FOV based on window size

---
 src/components/Viewer.jsx | 53 +++++++++++++++++++++++++++++++--------
 1 file changed, 43 insertions(+), 10 deletions(-)

diff --git a/src/components/Viewer.jsx b/src/components/Viewer.jsx
index 84a3e68..b3d4c17 100644
--- a/src/components/Viewer.jsx
+++ b/src/components/Viewer.jsx
@@ -2,7 +2,7 @@ import { Canvas } from '@react-three/fiber';
 import { XR, XROrigin, createXRStore } from '@react-three/xr';
 import * as THREE from 'three';
 import ImmersiveImageMesh from './ImmersiveImageMesh';
-import { useRef, useState } from 'react';
+import { useEffect, useRef, useState } from 'react';
 import { PerspectiveCamera } from '@react-three/drei';
 
 const store = createXRStore();
@@ -14,12 +14,37 @@ const cameraLayers = new THREE.Layers();
 cameraLayers.enable(0);
 cameraLayers.enable(1);
 
+const clamp = (val, min, max) => {
+    return Math.min(Math.max(val, min), max);
+}
+
+const linearScale = (factor, minInput, maxInput, minOutput, maxOutput, shouldClamp = true) => {
+    if (shouldClamp) {
+        factor = clamp(factor, minInput, maxInput);
+    }
+
+    return minOutput + (maxOutput - minOutput) *
+        (factor - minInput) / (maxInput - minInput);
+}
+
 export default function Viewer() {
     const [imageSrc, setImageSrc] = useState("");
     const [isInXR, setIsInXR] = useState(false);
     const [isDraggingOver, setIsDraggingOver] = useState(false);
     const cameraRef = useRef();
 
+    const resetFOV = () => {
+        // Experimentally determined values
+        cameraRef.current.fov = linearScale(window.innerWidth / window.innerHeight, 0.30, 2.5, 120, 70, true);
+        cameraRef.current.updateProjectionMatrix();
+    }
+
+    const handleResize = () => {
+        if (!isInXR && cameraRef.current) {
+            resetFOV();
+        }
+    };
+
     const processBrowsedFile = (e) => {
         if (!(e.target.files && e.target.files.length)) return;
 
@@ -39,8 +64,7 @@ export default function Viewer() {
         if (!newIsInXR && cameraRef.current) {
             cameraRef.current.rotation.set(...DEFAULT_CAMERA_ROTATION);
             cameraRef.current.position.set(...DEFAULT_CAMERA_POSITION_M);
-            cameraRef.current.fov = DEFAULT_FOV;
-            cameraRef.current.updateProjectionMatrix();
+            resetFOV();
         }
 
         setIsInXR(newIsInXR);
@@ -73,6 +97,13 @@ export default function Viewer() {
         setIsDraggingOver(false);
     };
 
+    useEffect(() => {
+        window.addEventListener('resize', handleResize);
+        return () => {
+            window.removeEventListener('resize', handleResize);
+        };
+    }, []);
+
     return (
         <div className='w-full h-full min-h-screen bg-black absolute flex items-center' onDragOver={handleDragOver} onDrop={handleDrop} onDragLeave={handleDragLeave}>
             <Canvas
@@ -90,14 +121,16 @@ export default function Viewer() {
                 </XR>
             </Canvas>
 
-            <div className='fixed left-1/2 -translate-x-1/2 bottom-0 bg-white/80 flex justify-center gap-4 md:gap-12 p-4 rounded-t-md'>
-                <div className='flex flex-col gap-1'>
-                    <p className='font-semibold'>Drop or select an Apple Spatial Photo <span className='font-mono'>(.heic)</span></p>
-                    <input className='cursor-pointer' type="file" accept=".heic" onChange={processBrowsedFile} />
-                    <p className='text-xs italic'>Your photo is processed on your device.</p>
-                </div>
+            <div className='fixed w-full flex justify-center bottom-0'>
+                <div className='absolute mx-4 bottom-4 bg-white/80 flex justify-center items-stretch flex-wrap gap-y-4 gap-x-8 p-2 md:p-4 rounded-md'>
+                    <div className='flex flex-col gap-1'>
+                        <p className='font-semibold'>Drop or select an Apple Spatial Photo <span className='font-mono'>(.heic)</span></p>
+                        <input className='cursor-pointer' type="file" accept=".heic" onChange={processBrowsedFile} />
+                        <p className='text-xs italic'>Your photo is processed on your device.</p>
+                    </div>
 
-                <button className='bg-amber-600 outline-double outline-0 hover:outline-2 active:outline-4 focus:outline-2 outline-white text-white px-8 py-2 font-semibold text-xl rounded-md transition-all duration-[25ms]' onClick={onXRButtonClicked}>{isInXR ? 'Exit' : 'Enter'} VR</button>
+                    <button className='bg-amber-600 outline-double outline-0 hover:outline-2 active:outline-4 focus:outline-2 outline-white text-white px-8 py-2 font-semibold text-xl rounded-md transition-all duration-[25ms]' onClick={onXRButtonClicked}>{isInXR ? 'Exit' : 'Enter'} VR</button>
+                </div>
             </div>
 
             <div className={`absolute inset-0 rounded-md border-dashed border-2 border-white bg-neutral-800/90 text-amber-500 font-semibold text-xl md:text-2xl flex-col gap-2 justify-center items-center ${isDraggingOver ? "flex" : "hidden"} pointer-events-none`}>