Fluid simulation · llama-4-scout
Create a real-time fluid simulation on a full-screen canvas where dragging the mouse pushes swirling colored dye through the fluid.
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Create a real-time fluid simulation on a full-screen canvas where dragging the mouse pushes swirling colored dye through the fluid.
create a real-time fluid simulation on a full-screen canvas where dragging the mouse pushes swirling colored dye through the fluid, we will need to use HTML5 canvas for rendering and JavaScript for the simulation logic. Below is a simplified example to get you started. This example will create a basic fluid simulation where you can drag the mouse to push colored dye through the fluid. ```html <!DOCTYPE html> <html> <head> <title>Fluid Simulation</title> <style> body, html { margin: 0; padding: 0; overflow: hidden; } canvas { width: 100%; height: 100vh; display: block; } </style> </head> <body> <canvas id="canvas"></canvas> <script> const canvas = document.getElementById('canvas'); const ctx = canvas.getContext('2d'); // Set canvas to full screen canvas.width = window.innerWidth; canvas.height = window.innerHeight; // Fluid properties const fluid = []; const particleCount = 10000; const particleSize = 3; let mouseDown = false; let lastX, lastY; // Initialize fluid particles for (let i = 0; i < particleCount; i++) { fluid.push({ x: Math.random() * canvas.width, y: Math.random() * canvas.height, vx: Math.random() * 2 - 1, vy: Math.random() * 2 - 1, color: `hsl(${Math.random() * 360}, 100%, 50%)` }); } // Draw and update fluid function draw() { ctx.clearRect(0, 0, canvas.width, canvas.height); for (let i = 0; i < fluid.length; i++) { const particle = fluid[i]; ctx.fillStyle = particle.color; ctx.beginPath(); ctx.arc(particle.x, particle.y, particleSize, 0, Math.PI * 2); ctx.fill(); // Update particle position particle.x += particle.vx; particle.y += particle.vy; // Boundary check and bounce if (particle.x < 0 || particle.x > canvas.width) particle.vx *= -1; if (particle.y < 0 || particle.y > canvas.height) particle.vy *= -1; } requestAnimationFrame(draw); } // Handle mouse events canvas.addEventListener('mousedown', (e) => { mouseDown = true; lastX = e.clientX; lastY = e.clientY; }); canvas.addEventListener('mousemove', (e) => { if (mouseDown) { const dx = e.clientX - lastX; const dy = e.clientY - lastY; const dist = Math.sqrt(dx * dx + dy * dy); if (dist > 5) { for (let i = 0; i < 100; i++) { fluid.push({ x: e.clientX, y: e.clientY, vx: (Math.random() - 0.5) * 5, vy: (Math.random() - 0.5) * 5, color: `hsl(${Math.random() * 360}, 100%, 50%)` }); } } lastX = e.clientX; lastY = e.clientY; } }); canvas.addEventListener('mouseup', () => mouseDown = false); draw(); </script> </body> </html> ``` This code snippet does the following: - Creates a full-screen canvas. - Initializes a set of particles with random positions, velocities, and colors. - Continuously draws and updates the positions of these particles, making them bounce off the canvas edges. - Listens for mouse events; when the mouse is dragged, it adds new particles at the mouse position, simulating the effect of pushing colored dye through the fluid. This is a basic example. Real fluid simulations can get much more complex, involving more sophisticated physics (like viscosity and gravity), optimization techniques for performance, and possibly WebGL for GPU acceleration for smoother rendering.
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