feat: better handle camera positioning

app/src/lib/graph-interface/graph/Graph.svelte

@@ -1,6 +1,5 @@
 <script lang="ts">
   import type { Edge, NodeInstance } from "@nodarium/types";
-  import { onMount } from "svelte";
   import { createKeyMap } from "../../helpers/createKeyMap";
   import AddMenu from "../components/AddMenu.svelte";
   import Background from "../background/Background.svelte";
@@ -93,15 +92,6 @@
     graphState.activeSocket = null;
     graphState.addMenuPosition = null;
   }
-
-  onMount(() => {
-    if (localStorage.getItem("cameraPosition")) {
-      const cPosition = JSON.parse(localStorage.getItem("cameraPosition")!);
-      if (Array.isArray(cPosition)) {
-        graphState.setCameraTransform(cPosition[0], cPosition[1], cPosition[2]);
-      }
-    }
-  });
 </script>
 
 <svelte:window

app/src/lib/graph-interface/graph/events.ts

@@ -455,7 +455,8 @@ export class MouseEventManager {
       this.state.cameraDown[1] -
       (my - this.state.mouseDown[1]) / this.state.cameraPosition[2];
 
-    this.state.setCameraTransform(newX, newY);
+    this.state.cameraPosition[0] = newX;
+    this.state.cameraPosition[1] = newY;
   }
 
 
@@ -486,15 +487,13 @@ export class MouseEventManager {
     const zoomRatio = newZoom / this.state.cameraPosition[2];
 
     // Update camera position and zoom level
-    this.state.setCameraTransform(
+    this.state.cameraPosition[0] = this.state.mousePosition[0] -
-      this.state.mousePosition[0] -
       (this.state.mousePosition[0] - this.state.cameraPosition[0]) /
-      zoomRatio,
+      zoomRatio;
-      this.state.mousePosition[1] -
+    this.state.cameraPosition[1] = this.state.mousePosition[1] -
       (this.state.mousePosition[1] - this.state.cameraPosition[1]) /
       zoomRatio,
-      newZoom,
+      this.state.cameraPosition[2] = newZoom;
-    );
   }
 
 }

app/src/lib/graph-interface/graph/state.svelte.ts

@@ -24,7 +24,24 @@ export function setGraphManager(manager: GraphManager) {
 
 export class GraphState {
 
-  constructor(private graph: GraphManager) { }
+  constructor(private graph: GraphManager) {
+    $effect.root(() => {
+      $effect(() => {
+        localStorage.setItem("cameraPosition", `[${this.cameraPosition[0]},${this.cameraPosition[1]},${this.cameraPosition[2]}]`)
+      })
+    })
+    const storedPosition = localStorage.getItem("cameraPosition")
+    if (storedPosition) {
+      try {
+        const d = JSON.parse(storedPosition);
+        this.cameraPosition[0] = d[0];
+        this.cameraPosition[1] = d[1];
+        this.cameraPosition[2] = d[2];
+      } catch (e) {
+        console.log("Failed to parsed stored camera position", e);
+      }
+    }
+  }
 
   width = $state(100);
   height = $state(100);
@@ -80,28 +97,7 @@ export class GraphState {
 
   isBodyFocused = () => document?.activeElement?.nodeName !== "INPUT";
 
-  setCameraTransform(
-    x = this.cameraPosition[0],
-    y = this.cameraPosition[1],
-    z = this.cameraPosition[2],
-  ) {
-    if (this.camera) {
-      this.camera.position.x = x;
-      this.camera.position.z = y;
-      this.camera.zoom = z;
-    }
-    this.cameraPosition = [x, y, z];
-    localStorage.setItem("cameraPosition", JSON.stringify(this.cameraPosition));
-  }
-
-
   updateNodePosition(node: NodeInstance) {
-    if (node.state.ref && node.state.mesh) {
-      if (node.state["x"] !== undefined && node.state["y"] !== undefined) {
-        node.state.ref.style.setProperty("--nx", `${node.state.x * 10}px`);
-        node.state.ref.style.setProperty("--ny", `${node.state.y * 10}px`);
-        node.state.mesh.position.x = node.state.x + 10;
-        node.state.mesh.position.z = node.state.y + this.getNodeHeight(node.type) / 2;
     if (
       node.state.x === node.position[0] &&
       node.state.y === node.position[1]
@@ -109,13 +105,16 @@ export class GraphState {
       delete node.state.x;
       delete node.state.y;
     }
-        this.graph.edges = [...this.graph.edges];
+
+    if (node.state["x"] !== undefined && node.state["y"] !== undefined) {
+      if (node.state.ref) {
+        node.state.ref.style.setProperty("--nx", `${node.state.x * 10}px`);
+        node.state.ref.style.setProperty("--ny", `${node.state.y * 10}px`);
+      }
     } else {
+      if (node.state.ref) {
         node.state.ref.style.setProperty("--nx", `${node.position[0] * 10}px`);
         node.state.ref.style.setProperty("--ny", `${node.position[1] * 10}px`);
-        node.state.mesh.position.x = node.position[0] + 10;
-        node.state.mesh.position.z =
-          node.position[1] + this.getNodeHeight(node.type) / 2;
       }
     }
   }

app/src/lib/graph-interface/keymaps.ts

@@ -88,11 +88,9 @@ export function setupKeymaps(keymap: Keymap, graph: GraphManager, graphState: Gr
       const ease = (t: number) => (t < 0.5 ? 2 * t * t : -1 + (4 - 2 * t) * t);
 
       animate(500, (a: number) => {
-        graphState.setCameraTransform(
+        graphState.cameraPosition[0] = lerp(camX, average[0], ease(a));
-          lerp(camX, average[0], ease(a)),
+        graphState.cameraPosition[1] = lerp(camY, average[1], ease(a));
-          lerp(camY, average[1], ease(a)),
+        graphState.cameraPosition[2] = lerp(camZ, 2, ease(a))
-          lerp(camZ, 2, ease(a)),
-        );
         if (graphState.mouseDown) return false;
       });
     },