Fireworks · nemotron-3-ultra-550b-a55b
Create a fireworks display on a full-screen canvas where clicks launch shells that explode into gravity-affected, fading particle bursts.
transcript · 4 messages
Create a fireworks display on a full-screen canvas where clicks launch shells that explode into gravity-affected, fading particle bursts.
thinking
We need to create a single-page web app: index.html with canvas full-screen, fireworks. Clicks launch shells that explode into gravity-affected, fading particle bursts. We need to write HTML with style and script. No external resources. Use vanilla JS. Let's craft. Plan: Create canvas full screen, requestAnimationFrame loop. Particles: shell objects rising then exploding. On click, create a shell at bottom center? Or at click position bottom? Probably click to launch from bottom center to click point? Simpler: click anywhere on canvas, launch a shell from bottom center towards click position, explode at click position. But typical fireworks: click to set explosion point; shell rises then explodes at that point. Implement: On click, record target point (x,y). Create a shell starting at bottom center (canvas.width/2, canvas.height) with velocity towards target; when reaches target (or after time), explode into many particles with random angles, initial speed, gravity, fade. Simplify: Immediately explode at click location? But spec says clicks launch shells that explode. Could launch from bottom center upward to click point. Implement shell: position, target, velocity. Update: move towards target; when distance small, explode. Explosion particles: each particle with pos, vel (random angle, speed), color, life, decay. Gravity: apply to particle velocity y += gravity per frame. Fade: alpha reduces over life. Loop: clear canvas with semi-transparent black for trails? Use clearRect each frame and draw particles. Let's code. We'll write HTML with style: body margin 0, canvas display block, width 100vw height 100vh. Script: set up canvas, resize handler. Data structures: shells array, particles array. Shell class: constructor(targetX, targetY) start at center bottom. compute direction vector, speed maybe 8. update: pos += vel; if distance to target < speed => explode. Explosion: create N particles (e.g., 80) with random angle 0-2π, speed 2-5, color random hue. Particle update: pos += vel; vel.y += gravity (0.05); life-- ; alpha = life / maxLife. Draw: for each particle, ctx.beginPath, arc, fill with rgba. Also draw shell as a small bright dot moving. Add requestAnimationFrame loop. Let's write index.html.
/workspace/index.html (3239 bytes)Successfully wrote 3239 bytes to /workspace/index.html
thinking
We have created index.html with full code. Need to ensure it's self-contained, no external resources. It meets requirements: full-screen canvas, clicks launch shells that explode into gravity-affected fading particle bursts. Provide final answer.
The fireworks web app has been created as a single self‑contained **index.html** file in the current directory. It includes: * A full‑screen `<canvas>` that resizes with the window. * Click handling that launches a shell from the bottom center toward the click point. * Shells travel upward and explode at the target location. * Explosions spawn many particles with random directions, gravity, and fading alpha. * All rendering is done in a `requestAnimationFrame` loop with no external resources. You can open **/workspace/index.html** in a browser to see the fireworks in action.
TAKE IT TO CODE
A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.
RUN
EVALUATION
Click launches a shell that explodes into a colorful gravity-affected particle burst; keyboard has no effect but that's expected.
Vision grade · anthropic/claude-sonnet-5
MEASUREMENTS
Raw readings from the capture, not a verdict — the grade above is the only judgement. Percentages are how much of the screen changed; the measure under-reports sparse motion on a dark background.