[#77] feat: home page background

* wip: new branch test

* feat: new home page three background

Author: cd-bash

src/components/three-background/discs.ts

@@ -0,0 +1,100 @@
+import * as THREE from "three";
+import {scene} from "./scene.ts";
+
+let gridSpheres: { mesh: THREE.Mesh, dist: number }[] = [];
+let backgroundGridSpheres: { mesh: THREE.Mesh, baseY: number }[] = [];
+let backgroundGridSpheres2D: { mesh: THREE.Mesh, baseY: number }[][] = [];
+
+export const initHomePage = () => {
+    createWavyGridFloor();
+    createBackgroundGrid();
+    animateWaves();
+}
+
+const createWavyGridFloor = () => {
+    const size = 1000;
+    const divisions = 40;
+    const step = size / divisions;
+    const halfSize = size / 2;
+
+    const sphereGeometry = new THREE.SphereGeometry(4, 8, 8);
+    const sphereMaterial = new THREE.MeshBasicMaterial({ color: 0x3BFFC5, wireframe: true });
+
+    gridSpheres = [];
+
+    for (let i = 0; i <= divisions; i++) {
+        for (let j = 0; j <= divisions; j++) {
+            const x = -halfSize + i * step;
+            const z = -halfSize + j * step;
+            const dist = Math.sqrt(x * x + z * z) / halfSize; // normalized [0,1]
+            const sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);
+            sphere.position.set(x, 0, z);
+            scene.add(sphere);
+            gridSpheres.push({ mesh: sphere, dist });
+        }
+    }
+}
+
+const createBackgroundGrid = () => {
+    const size = 10000;
+    const divisions = 50;
+    const step = size / divisions;
+    const halfSize = size / 2;
+
+    const sphereGeometry = new THREE.SphereGeometry(3, 8, 8);
+    const sphereMaterial = new THREE.MeshBasicMaterial({ color: 0xffffff, wireframe: true });
+
+    backgroundGridSpheres = [];
+    backgroundGridSpheres2D = [];
+
+    // Create spheres and store in 2D array
+    for (let i = 0; i <= divisions; i++) {
+        backgroundGridSpheres2D[i] = [];
+        for (let j = 0; j <= divisions; j++) {
+            const x = -halfSize + i * step;
+            const z = -halfSize + j * step - 500;
+            const dist = Math.sqrt(x * x + z * z) / halfSize;
+            const amplitude = -2500;
+            const baseY = -2500 - dist * amplitude;
+            const sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);
+            sphere.position.set(x, baseY, z);
+            scene.add(sphere);
+            const sphereObj = { mesh: sphere, baseY };
+            backgroundGridSpheres.push(sphereObj);
+            backgroundGridSpheres2D[i][j] = sphereObj;
+        }
+    }
+
+    // Link neighbors with lines
+    const lineMaterial = new THREE.LineBasicMaterial({ color: 0xffffff, opacity: 0.3, transparent: true });
+    for (let i = 0; i <= divisions; i++) {
+        for (let j = 0; j <= divisions; j++) {
+            const current = backgroundGridSpheres2D[i][j].mesh.position;
+            // Link to right neighbor
+            if (i < divisions) {
+                const right = backgroundGridSpheres2D[i + 1][j].mesh.position;
+                const geometry = new THREE.BufferGeometry().setFromPoints([current, right]);
+                const line = new THREE.Line(geometry, lineMaterial);
+                scene.add(line);
+            }
+            // Link to bottom neighbor
+            if (j < divisions) {
+                const bottom = backgroundGridSpheres2D[i][j + 1].mesh.position;
+                const geometry = new THREE.BufferGeometry().setFromPoints([current, bottom]);
+                const line = new THREE.Line(geometry, lineMaterial);
+                scene.add(line);
+            }
+        }
+    }
+}
+
+const animateWaves = () => {
+    const time = performance.now() * 0.001;
+    for (const { mesh, dist } of gridSpheres) {
+        const { x, z } = mesh.position;
+        const amplitude = 20 + dist * 60;
+        mesh.position.y = Math.sin(0.01 * (x + z) + time) * amplitude - 500;
+    }
+
+    requestAnimationFrame(animateWaves);
+}

src/components/three-background/homeGrid.ts

@@ -3,7 +3,7 @@ import {changeDepth, initCamera, initScene, initStage, renderer} from "./scene.t
 import {initBgMeshes} from "./particules.ts";
 import {initPostProcess} from "./post-process.ts";
 import {animate} from "./animation-loop.ts";
-import {initDiscs} from "./discs.ts";
+import {initHomePage} from "./homeGrid.ts";
 
 export enum BackgroundChoice {
     Home,
@@ -18,7 +18,7 @@ export function threeBackground(choice: BackgroundChoice) {
     initCamera();
 
     if (choice === BackgroundChoice.Home) {
-        initDiscs();
+        initHomePage();
     }
 
     if (choice === BackgroundChoice.Project) {