Трансформация фона

<div id='mouse-deformation'></div>

<!-- Скрипт отвечает за работу фона -->
<style>
    
    canvas {
        width: 100% !important;
        height: 100% !important;
    }
    
</style>

<script src='https://cdn.jsdelivr.net/npm/ogl@0.0.64/dist/ogl.umd.js'></script>
<script type="module">
    const imgSize = [1650, 1200];

    const vertex = `
					attribute vec2 uv;
					attribute vec2 position;
					varying vec2 vUv;
					void main() {
							vUv = uv;
							gl_Position = vec4(position, 0, 1);
					}
			`;
    const fragment = `
					precision highp float;
					precision highp int;
					uniform sampler2D tWater;
					uniform sampler2D tFlow;
					uniform float uTime;
					varying vec2 vUv;
					uniform vec4 res;

					void main() {

							// R and G values are velocity in the x and y direction
							// B value is the velocity length
							vec3 flow = texture2D(tFlow, vUv).rgb;

							vec2 uv = .5 * gl_FragCoord.xy / res.xy ;
							vec2 myUV = (uv - vec2(0.5))*res.zw + vec2(0.5);
							myUV -= flow.xy * (0.15 * 0.7);

							vec2 myUV2 = (uv - vec2(0.5))*res.zw + vec2(0.5);
							myUV2 -= flow.xy * (0.125 * 0.7);

							vec2 myUV3 = (uv - vec2(0.5))*res.zw + vec2(0.5);
							myUV3 -= flow.xy * (0.10 * 0.7);

							vec3 tex = texture2D(tWater, myUV).rgb;
							vec3 tex2 = texture2D(tWater, myUV2).rgb;
							vec3 tex3 = texture2D(tWater, myUV3).rgb;

              gl_FragColor = vec4(tex.r, tex2.g, tex3.b, 1.0);
					}
			`;
    {
      const renderer = new ogl.Renderer({ dpr: 2 });
      const gl = renderer.gl;
      $(gl.canvas).appendTo('#mouse-deformation');
      //document.body.appendChild(gl.canvas);

      // Variable inputs to control flowmap
      let aspect = 1;
      const mouse = new ogl.Vec2(-1);
      const velocity = new ogl.Vec2();
      function resize() {
        let a1, a2;
        var imageAspect = imgSize[1] / imgSize[0];
        if (window.innerHeight / window.innerWidth < imageAspect) {
          a1 = 1;
          a2 = window.innerHeight / window.innerWidth / imageAspect;
        } else {
          a1 = (window.innerWidth / window.innerHeight) * imageAspect;
          a2 = 1;
        }
        mesh.program.uniforms.res.value = new ogl.Vec4(
          window.innerWidth,
          window.innerHeight,
          a1,
          a2
        );

        renderer.setSize(window.innerWidth, window.innerHeight);
        aspect = window.innerWidth / window.innerHeight;
      }
      const flowmap = new ogl.Flowmap(gl, {
        falloff: 1.0, // size of the stamp, percentage of the size
        alpha: 0.3, // opacity of the stamp
        dissipation: 0.94 // affects the speed that the stamp fades. Closer to 1 is slower
      });
      // Triangle that includes -1 to 1 range for 'position', and 0 to 1 range for 'uv'.
      const geometry = new ogl.Geometry(gl, {
        position: {
          size: 2,
          data: new Float32Array([-1, -1, 3, -1, -1, 3])
        },
        uv: { size: 2, data: new Float32Array([0, 0, 2, 0, 0, 2]) }
      });
      const texture = new ogl.Texture(gl, {
        minFilter: gl.LINEAR,
        magFilter: gl.LINEAR
      });
      const img = new Image();
      img.onload = () => (texture.image = img);
      img.crossOrigin = "Anonymous";
      img.src = "https://static.tildacdn.com/tild6637-3865-4861-b637-353137633834/nikolay-hristov-E2V8.jpg";

      let a1, a2;
      var imageAspect = imgSize[1] / imgSize[0];
      if (window.innerHeight / window.innerWidth < imageAspect) {
        a1 = 1;
        a2 = window.innerHeight / window.innerWidth / imageAspect;
      } else {
        a1 = (window.innerWidth / window.innerHeight) * imageAspect;
        a2 = 1;
      }

      const program = new ogl.Program(gl, {
        vertex,
        fragment,
        uniforms: {
          uTime: { value: 0 },
          tWater: { value: texture },
          res: {
            value: new ogl.Vec4(window.innerWidth, window.innerHeight, a1, a2)
          },
          img: { value: new ogl.Vec2(imgSize[0], imgSize[1]) },
          // Note that the uniform is applied without using an object and value property
          // This is because the class alternates this texture between two render targets
          // and updates the value property after each render.
          tFlow: flowmap.uniform
        }
      });
      const mesh = new ogl.Mesh(gl, { geometry, program });

      window.addEventListener("resize", resize, false);
      resize();

      // Create handlers to get mouse position and velocity
      const isTouchCapable = "ontouchstart" in window;
      if (isTouchCapable) {
        window.addEventListener("touchstart", updateMouse, false);
        window.addEventListener("touchmove", updateMouse, { passive: false });
      } else {
        window.addEventListener("mousemove", updateMouse, false);
      }
      let lastTime;
      const lastMouse = new ogl.Vec2();
      function updateMouse(e) {
        e.preventDefault();
        if (e.changedTouches && e.changedTouches.length) {
          e.x = e.changedTouches[0].pageX;
          e.y = e.changedTouches[0].pageY;
        }
        if (e.x === undefined) {
          e.x = e.pageX;
          e.y = e.pageY;
        }
        // Get mouse value in 0 to 1 range, with y flipped
        mouse.set(e.x / gl.renderer.width, 1.0 - e.y / gl.renderer.height);
        // Calculate velocity
        if (!lastTime) {
          // First frame
          lastTime = performance.now();
          lastMouse.set(e.x, e.y);
        }

        const deltaX = e.x - lastMouse.x;
        const deltaY = e.y - lastMouse.y;

        lastMouse.set(e.x, e.y);

        let time = performance.now();

        // Avoid dividing by 0
        let delta = Math.max(10.4, time - lastTime);
        lastTime = time;
        velocity.x = deltaX / delta;
        velocity.y = deltaY / delta;
        // Flag update to prevent hanging velocity values when not moving
        velocity.needsUpdate = true;
      }
      requestAnimationFrame(update);
      function update(t) {
        requestAnimationFrame(update);
        // Reset velocity when mouse not moving
        if (!velocity.needsUpdate) {
          mouse.set(-1);
          velocity.set(0);
        }
        velocity.needsUpdate = false;
        // Update flowmap inputs
        flowmap.aspect = aspect;
        flowmap.mouse.copy(mouse);
        // Ease velocity input, slower when fading out
        flowmap.velocity.lerp(velocity, velocity.len ? 0.15 : 0.1);
        flowmap.update();
        program.uniforms.uTime.value = t * 0.01;
        renderer.render({ scene: mesh });
      }
    }
  </script>