ShaneBrumback/threejs-examples-animating-3d-spheres-and-fragment-shaders.html

## threejs-examples-animating-3d-spheres-and-fragment-shaders.html
<html>
<head>
    <title>Three.js Examples - Animating 3D Spheres and Fragment Shaders</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">


</head>

<body>

    <script src="https://cdn.jsdelivr.net/npm/three@latest/build/three.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/three@latest/examples/js/controls/OrbitControls.js"></script>

    <script>

        // Set up Three js scene
        const scene = new THREE.Scene();

        // Set up the camera
        const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 500);
        camera.position.z = 5;

        // Configure renderer settings
        let renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true });
        renderer.setPixelRatio(window.devicePixelRatio);
        renderer.setSize(window.innerWidth, window.innerHeight);
        renderer.toneMapping = THREE.ReinhardToneMapping;
        renderer.domElement.id = 'renderer';
        renderer.setClearColor(0x000000, 1); // Set background color to black
        renderer.domElement.style.position = 'fixed';
        renderer.domElement.style.zIndex = '-1';
        renderer.domElement.style.left = '0';
        renderer.domElement.style.top = '0';
        document.body.appendChild(renderer.domElement);


        //  // Create the gradient shader material
        var shaderGradientAnimatedMaterial = new THREE.ShaderMaterial({
            side: THREE.DoubleSide,
            uniforms: {
                time: { value: 0.0 }
            },
            vertexShader: `
        void main() {
        gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
        }
        `,
            fragmentShader: `
        uniform float time;

        void main() {
        gl_FragColor = vec4(
        sin( time + gl_FragCoord.x * 0.01 ) * 0.5 + 0.5,
        sin( time + gl_FragCoord.y * 0.01 ) * 0.5 + 0.5,
        sin( time ) * 0.5 + 0.5,
        1.0
        );

        }
        `
        });


        // Set up the orbital controls
        const controls = new THREE.OrbitControls(camera, renderer.domElement);
        controls.dampingFactor = 0.1; // Reduce camera damping for smoother movement
        controls.autoRotate = true; // Make the camera rotate sinuously around the spheres

        // Create and add the spheres to the scene
        const sphereGeometry = new THREE.SphereGeometry(0.5, 32, 32);
        for (let i = 0; i < 100; i++) {
            const sphereMaterial = new THREE.MeshLambertMaterial({ color: Math.random() * 0xffffff });
            const sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);
            sphere.position.x = Math.random() * 10 - 5;
            sphere.position.y = Math.random() * 10 - 5;
            sphere.position.z = Math.random() * 10 - 5;
            sphere.velocity = new THREE.Vector3(Math.random() * 0.2 - 0.1, Math.random() * 0.2 - 0.1, Math.random() * 0.2 - 0.1);
            scene.add(sphere);
        }

        // Create the spotlight with shadows
        const spotLight = new THREE.SpotLight(0xffffff);
        spotLight.position.set(10, 20, 30);
        spotLight.castShadow = true;
        scene.add(spotLight);

        // Add ambient light
        const ambientLight = new THREE.AmbientLight(0xffffff, 0.5);
        scene.add(ambientLight);

        // Enable shadows on the spheres
        scene.traverse(function (node) {
            if (node instanceof THREE.Mesh) {
                node.castShadow = true;
            }
        });

        // Create the plane's geometry
        const planeGeometry = new THREE.PlaneGeometry(100, 100);
        // Create a material to apply to the plane
        const planeMaterial = new THREE.MeshBasicMaterial({
            color: 'blue',
            side: THREE.DoubleSide,
            depthWrite: false
        });
        // Create the plane
        const plane = new THREE.Mesh(planeGeometry, shaderGradientAnimatedMaterial);
        plane.rotation.x = Math.PI / 2
        plane.rotation.z = Math.PI;
        plane.position.y = -6;
        plane.receiveShadow = true;
        plane.castShadow = true
        // Add the plane to the scene
        scene.add(plane);


        //Add a grid helper
        var grid = new THREE.GridHelper(100, 30);
        //grid.renderOrder = 0;
        grid.position.y = -6;
        scene.add(grid);

        // Animate the spheres
        function animate() {
            requestAnimationFrame(animate);
            controls.update();
            // Move the spheres
            scene.traverse(function (node) {
                if (node instanceof THREE.Mesh) {
                    let objectName = node.geometry.type
                    if (objectName == 'SphereGeometry') {
                        node.position.add(node.velocity);
                        // Check boundaries and change direction if necessary
                        if (node.position.x < -5 || node.position.x > 5) {
                            node.velocity.x *= -1;
                        }
                        if (node.position.y < -5 || node.position.y > 5) {
                            node.velocity.y *= -1;
                        }
                        if (node.position.z < -5 || node.position.z > 5) {
                            node.velocity.z *= -1;
                        }
                    }
                }
            });
            shaderGradientAnimatedMaterial.uniforms.time.value += 0.05;
            renderer.render(scene, camera);
        }

        animate();


        // Add event listener for window resize
        window.addEventListener('resize', onWindowResize);

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

    </script>

</body>
</html>
	<html>
	<head>
	<title>Three.js Examples - Animating 3D Spheres and Fragment Shaders</title>
	<meta name="viewport" content="width=device-width, initial-scale=1">


	</head>

	<body>

	<script src="https://cdn.jsdelivr.net/npm/three@latest/build/three.min.js"></script>
	<script src="https://cdn.jsdelivr.net/npm/three@latest/examples/js/controls/OrbitControls.js"></script>

	<script>

	// Set up Three js scene
	const scene = new THREE.Scene();

	// Set up the camera
	const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 500);
	camera.position.z = 5;

	// Configure renderer settings
	let renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true });
	renderer.setPixelRatio(window.devicePixelRatio);
	renderer.setSize(window.innerWidth, window.innerHeight);
	renderer.toneMapping = THREE.ReinhardToneMapping;
	renderer.domElement.id = 'renderer';
	renderer.setClearColor(0x000000, 1); // Set background color to black
	renderer.domElement.style.position = 'fixed';
	renderer.domElement.style.zIndex = '-1';
	renderer.domElement.style.left = '0';
	renderer.domElement.style.top = '0';
	document.body.appendChild(renderer.domElement);


	// // Create the gradient shader material
	var shaderGradientAnimatedMaterial = new THREE.ShaderMaterial({
	side: THREE.DoubleSide,
	uniforms: {
	time: { value: 0.0 }
	},
	vertexShader: `
	void main() {
	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
	}
	`,
	fragmentShader: `
	uniform float time;

	void main() {
	gl_FragColor = vec4(
	sin( time + gl_FragCoord.x * 0.01 ) * 0.5 + 0.5,
	sin( time + gl_FragCoord.y * 0.01 ) * 0.5 + 0.5,
	sin( time ) * 0.5 + 0.5,
	1.0
	);

	}
	`
	});


	// Set up the orbital controls
	const controls = new THREE.OrbitControls(camera, renderer.domElement);
	controls.dampingFactor = 0.1; // Reduce camera damping for smoother movement
	controls.autoRotate = true; // Make the camera rotate sinuously around the spheres

	// Create and add the spheres to the scene
	const sphereGeometry = new THREE.SphereGeometry(0.5, 32, 32);
	for (let i = 0; i < 100; i++) {
	const sphereMaterial = new THREE.MeshLambertMaterial({ color: Math.random() * 0xffffff });
	const sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);
	sphere.position.x = Math.random() * 10 - 5;
	sphere.position.y = Math.random() * 10 - 5;
	sphere.position.z = Math.random() * 10 - 5;
	sphere.velocity = new THREE.Vector3(Math.random() * 0.2 - 0.1, Math.random() * 0.2 - 0.1, Math.random() * 0.2 - 0.1);
	scene.add(sphere);
	}

	// Create the spotlight with shadows
	const spotLight = new THREE.SpotLight(0xffffff);
	spotLight.position.set(10, 20, 30);
	spotLight.castShadow = true;
	scene.add(spotLight);

	// Add ambient light
	const ambientLight = new THREE.AmbientLight(0xffffff, 0.5);
	scene.add(ambientLight);

	// Enable shadows on the spheres
	scene.traverse(function (node) {
	if (node instanceof THREE.Mesh) {
	node.castShadow = true;
	}
	});

	// Create the plane's geometry
	const planeGeometry = new THREE.PlaneGeometry(100, 100);
	// Create a material to apply to the plane
	const planeMaterial = new THREE.MeshBasicMaterial({
	color: 'blue',
	side: THREE.DoubleSide,
	depthWrite: false
	});
	// Create the plane
	const plane = new THREE.Mesh(planeGeometry, shaderGradientAnimatedMaterial);
	plane.rotation.x = Math.PI / 2
	plane.rotation.z = Math.PI;
	plane.position.y = -6;
	plane.receiveShadow = true;
	plane.castShadow = true
	// Add the plane to the scene
	scene.add(plane);


	//Add a grid helper
	var grid = new THREE.GridHelper(100, 30);
	//grid.renderOrder = 0;
	grid.position.y = -6;
	scene.add(grid);

	// Animate the spheres
	function animate() {
	requestAnimationFrame(animate);
	controls.update();
	// Move the spheres
	scene.traverse(function (node) {
	if (node instanceof THREE.Mesh) {
	let objectName = node.geometry.type
	if (objectName == 'SphereGeometry') {
	node.position.add(node.velocity);
	// Check boundaries and change direction if necessary
	if (node.position.x < -5 \|\| node.position.x > 5) {
	node.velocity.x *= -1;
	}
	if (node.position.y < -5 \|\| node.position.y > 5) {
	node.velocity.y *= -1;
	}
	if (node.position.z < -5 \|\| node.position.z > 5) {
	node.velocity.z *= -1;
	}
	}
	}
	});
	shaderGradientAnimatedMaterial.uniforms.time.value += 0.05;
	renderer.render(scene, camera);
	}

	animate();


	// Add event listener for window resize
	window.addEventListener('resize', onWindowResize);

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

	</script>

	</body>
	</html>