ORDINARY-TECHNOLOGY/egg2.html at main · PARTLYDECENT/ORDINARY-TECHNOLOGY · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>3D Procedural Terrain Generator</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
    <!-- OrbitControls is needed for camera movement -->
    <script src="https://cdn.jsdelivr.net/npm/three@0.128.0/examples/js/controls/OrbitControls.js"></script>
    <style>
        body {
            margin: 0;
            padding: 0;
            overflow: hidden;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #050505;
            color: #eee;
        }

        #ui-panel {
            position: absolute;
            top: 20px;
            left: 20px;
            width: 300px;
            background: rgba(20, 20, 25, 0.85);
            backdrop-filter: blur(10px);
            padding: 20px;
            border-radius: 12px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.1);
            user-select: none;
            z-index: 100;
        }

        h1 {
            font-size: 1.2rem;
            margin: 0 0 15px 0;
            color: #4facfe;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .control-group {
            margin-bottom: 15px;
        }

        label {
            display: block;
            font-size: 0.8rem;
            margin-bottom: 5px;
            color: #bbb;
        }

        input[type="range"] {
            width: 100%;
            cursor: pointer;
            accent-color: #4facfe;
        }

        .button-group {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
            margin-top: 20px;
        }

        button {
            background: #4facfe;
            border: none;
            color: white;
            padding: 10px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: bold;
            transition: all 0.2s;
        }

        button:hover {
            background: #00f2fe;
            transform: translateY(-1px);
        }

        button.secondary {
            background: #444;
        }

        button.secondary:hover {
            background: #555;
        }

        .stats {
            position: absolute;
            bottom: 20px;
            right: 20px;
            font-size: 0.8rem;
            color: rgba(255,255,255,0.5);
            pointer-events: none;
        }

        canvas {
            display: block;
        }

        .loading-overlay {
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            background: #050505;
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 1000;
            transition: opacity 0.5s;
        }

        .loading-overlay.hidden {
            opacity: 0;
            pointer-events: none;
        }
    </style>
</head>
<body>

    <div id="loading" class="loading-overlay">
        <div>Generating World...</div>
    </div>

    <div id="ui-panel">
        <h1>Terrain Forge</h1>

        <div class="control-group">
            <label>Noise Scale: <span id="val-scale">40</span></label>
            <input type="range" id="scale" min="10" max="100" value="45">
        </div>

        <div class="control-group">
            <label>Elevation: <span id="val-height">20</span></label>
            <input type="range" id="height" min="1" max="50" value="25">
        </div>

        <div class="control-group">
            <label>Detail (Octaves): <span id="val-octaves">5</span></label>
            <input type="range" id="octaves" min="1" max="8" value="5">
        </div>

        <div class="control-group">
            <label>Roughness: <span id="val-pers">0.5</span></label>
            <input type="range" id="persistence" min="0.1" max="0.9" step="0.05" value="0.5">
        </div>

        <div class="control-group">
            <label>Sea Level: <span id="val-sea">0.2</span></label>
            <input type="range" id="sealevel" min="0" max="0.8" step="0.05" value="0.2">
        </div>

        <div class="button-group">
            <button id="regen">New Seed</button>
            <button id="download" class="secondary">Export OBJ</button>
        </div>
    </div>

    <div class="stats">WASD/Mouse to Orbit • Space to Toggle Auto-Rotate</div>

    <script>
        /** * SIMPLEX NOISE IMPLEMENTATION
         * Compact version for procedural generation
         */
        const SimplexNoise = function(seed = Math.random()) {
            const p = new Uint8Array(256);
            for (let i = 0; i < 256; i++) p[i] = i;
            let m = 256, n, k;
            while (m) {
                n = Math.floor(seed * m--);
                k = p[m]; p[m] = p[n]; p[n] = k;
                seed = (seed * 1103515245 + 12345) & 0x7fffffff;
                seed /= 0x7fffffff;
            }
            const perm = new Uint8Array(512);
            const gradP = new Float32Array(512 * 3);
            const grad3 = [[1,1,0],[-1,1,0],[1,-1,0],[-1,-1,0],[1,0,1],[-1,0,1],[1,0,-1],[-1,0,-1],[0,1,1],[0,-1,1],[0,1,-1],[0,-1,-1]];
            for (let i = 0; i < 512; i++) {
                perm[i] = p[i & 255];
                let g = grad3[perm[i] % 12];
                gradP[i*3] = g[0]; gradP[i*3+1] = g[1]; gradP[i*3+2] = g[2];
            }
            const F2 = 0.5 * (Math.sqrt(3) - 1), G2 = (3 - Math.sqrt(3)) / 6;
            this.noise2D = function(xin, yin) {
                let s = (xin + yin) * F2, i = Math.floor(xin + s), j = Math.floor(yin + s);
                let t = (i + j) * G2, x0 = xin - (i - t), y0 = yin - (j - t);
                let i1, j1; if (x0 > y0) { i1 = 1; j1 = 0; } else { i1 = 0; j1 = 1; }
                let x1 = x0 - i1 + G2, y1 = y0 - j1 + G2, x2 = x0 - 1 + 2 * G2, y2 = y0 - 1 + 2 * G2;
                i &= 255; j &= 255;
                let n0, n1, n2;
                let t0 = 0.5 - x0 * x0 - y0 * y0;
                if (t0 < 0) n0 = 0; else { t0 *= t0; n0 = t0 * t0 * (gradP[(i + perm[j]) * 3] * x0 + gradP[(i + perm[j]) * 3 + 1] * y0); }
                let t1 = 0.5 - x1 * x1 - y1 * y1;
                if (t1 < 0) n1 = 0; else { t1 *= t1; n1 = t1 * t1 * (gradP[(i + i1 + perm[j + j1]) * 3] * x1 + gradP[(i + i1 + perm[j + j1]) * 3 + 1] * y1); }
                let t2 = 0.5 - x2 * x2 - y2 * y2;
                if (t2 < 0) n2 = 0; else { t2 *= t2; n2 = t2 * t2 * (gradP[(i + 1 + perm[j + 1]) * 3] * x2 + gradP[(i + 1 + perm[j + 1]) * 3 + 1] * y2); }
                return 70 * (n0 + n1 + n2);
            };
        };

        // --- APP LOGIC ---
        let scene, camera, renderer, terrain, water, controls;
        let simplex = new SimplexNoise();
        const GRID_SIZE = 128;
        const WORLD_WIDTH = 100;

        let params = {
            scale: 45,
            height: 25,
            octaves: 5,
            persistence: 0.5,
            seaLevel: 0.2,
            autoRotate: true
        };

        function init() {
            scene = new THREE.Scene();
            scene.background = new THREE.Color(0x0a0a12);
            scene.fog = new THREE.FogExp2(0x0a0a12, 0.005);

            camera = new THREE.PerspectiveCamera(60, window.innerWidth / window.innerHeight, 0.1, 1000);
            camera.position.set(80, 60, 80);

            renderer = new THREE.WebGLRenderer({ antialias: true });
            renderer.setSize(window.innerWidth, window.innerHeight);
            renderer.setPixelRatio(window.devicePixelRatio);
            renderer.shadowMap.enabled = true;
            document.body.appendChild(renderer.domElement);

            controls = new THREE.OrbitControls(camera, renderer.domElement);
            controls.enableDamping = true;
            controls.dampingFactor = 0.05;
            controls.autoRotate = params.autoRotate;

            // Lights
            const ambient = new THREE.AmbientLight(0xffffff, 0.4);
            scene.add(ambient);

            const sun = new THREE.DirectionalLight(0xffffff, 0.8);
            sun.position.set(100, 100, 50);
            sun.castShadow = true;
            scene.add(sun);

            createTerrain();
            createWater();

            window.addEventListener('resize', onWindowResize);
            window.addEventListener('keydown', (e) => {
                if(e.code === 'Space') {
                    params.autoRotate = !params.autoRotate;
                    controls.autoRotate = params.autoRotate;
                }
            });

            // UI Events
            setupUI();

            animate();
            document.getElementById('loading').classList.add('hidden');
        }

        function createTerrain() {
            if (terrain) scene.remove(terrain);

            const geometry = new THREE.PlaneBufferGeometry(WORLD_WIDTH, WORLD_WIDTH, GRID_SIZE, GRID_SIZE);
            geometry.rotateX(-Math.PI / 2);

            const vertices = geometry.attributes.position.array;
            const colors = new Float32Array(vertices.length);

            const color = new THREE.Color();

            for (let i = 0; i < vertices.length; i += 3) {
                const x = vertices[i];
                const z = vertices[i + 2];

                // Octave Noise
                let h = 0;
                let amp = 1;
                let freq = 1 / params.scale;
                let maxH = 0;

                for (let o = 0; o < params.octaves; o++) {
                    h += simplex.noise2D(x * freq, z * freq) * amp;
                    maxH += amp;
                    amp *= params.persistence;
                    freq *= 2;
                }

                // Normalize and apply exponent for realistic valleys
                h /= maxH;
                h = Math.pow((h + 1) / 2, 1.5);

                const finalY = h * params.height;
                vertices[i + 1] = finalY;

                // Coloring based on height
                if (h < params.seaLevel + 0.02) {
                    color.setHex(0xd2b48c); // Sand
                } else if (h < 0.5) {
                    color.setHex(0x3a5f0b); // Grass
                } else if (h < 0.75) {
                    color.setHex(0x555555); // Rock
                } else {
                    color.setHex(0xffffff); // Snow
                }

                colors[i] = color.r;
                colors[i + 1] = color.g;
                colors[i + 2] = color.b;
            }

            geometry.setAttribute('color', new THREE.BufferAttribute(colors, 3));
            geometry.computeVertexNormals();

            const material = new THREE.MeshStandardMaterial({
                vertexColors: true,
                roughness: 0.8,
                metalness: 0.1,
                flatShading: false
            });

            terrain = new THREE.Mesh(geometry, material);
            terrain.receiveShadow = true;
            terrain.castShadow = true;
            scene.add(terrain);
        }

        function createWater() {
            if (water) scene.remove(water);
            const geometry = new THREE.PlaneBufferGeometry(WORLD_WIDTH, WORLD_WIDTH);
            geometry.rotateX(-Math.PI / 2);

            const material = new THREE.MeshStandardMaterial({
                color: 0x006994,
                transparent: true,
                opacity: 0.6,
                roughness: 0.1,
                metalness: 0.5
            });

            water = new THREE.Mesh(geometry, material);
            water.position.y = params.seaLevel * params.height;
            scene.add(water);
        }

        function setupUI() {
            const inputs = ['scale', 'height', 'octaves', 'persistence', 'sealevel'];
            inputs.forEach(id => {
                const el = document.getElementById(id);
                el.addEventListener('input', (e) => {
                    const val = parseFloat(e.target.value);
                    if(id === 'sealevel') params.seaLevel = val;
                    else params[id] = val;

                    document.getElementById('val-' + id).innerText = val;
                    updateScene();
                });
            });

            document.getElementById('regen').addEventListener('click', () => {
                simplex = new SimplexNoise();
                updateScene();
            });

            document.getElementById('download').addEventListener('click', exportToOBJ);
        }

        function updateScene() {
            createTerrain();
            water.position.y = params.seaLevel * params.height;
        }

        function onWindowResize() {
            camera.aspect = window.innerWidth / window.innerHeight;
            camera.updateProjectionMatrix();
            renderer.setSize(window.innerWidth, window.innerHeight);
        }

        function animate() {
            requestAnimationFrame(animate);
            controls.update();

            // Subtle water movement
            if(water) {
                water.position.y = (params.seaLevel * params.height) + Math.sin(Date.now() * 0.001) * 0.1;
            }

            renderer.render(scene, camera);
        }

        /**
         * Simple OBJ Exporter
         */
        function exportToOBJ() {
            const geo = terrain.geometry;
            const vertices = geo.attributes.position.array;
            const normals = geo.attributes.normal.array;
            const indices = geo.index ? geo.index.array : null;

            let objData = "# Terrain Forge Export\no Terrain\n";

            // Vertices
            for (let i = 0; i < vertices.length; i += 3) {
                objData += `v ${vertices[i].toFixed(4)} ${vertices[i+1].toFixed(4)} ${vertices[i+2].toFixed(4)}\n`;
            }

            // Faces (based on PlaneBufferGeometry order)
            // For a regular grid PlaneBufferGeometry
            const segments = GRID_SIZE;
            for (let j = 0; j < segments; j++) {
                for (let i = 0; i < segments; i++) {
                    const a = i + j * (segments + 1) + 1;
                    const b = i + (j + 1) * (segments + 1) + 1;
                    const c = (i + 1) + (j + 1) * (segments + 1) + 1;
                    const d = (i + 1) + j * (segments + 1) + 1;
                    objData += `f ${a} ${b} ${c}\n`;
                    objData += `f ${a} ${c} ${d}\n`;
                }
            }

            const blob = new Blob([objData], { type: 'text/plain' });
            const url = URL.createObjectURL(blob);
            const a = document.createElement('a');
            a.href = url;
            a.download = 'terrain.obj';
            a.click();
            URL.revokeObjectURL(url);
        }

        window.onload = init;
    </script>
</body>
</html>