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8e:T2ed6,[V0_FILE]typescriptreact:file="app/page.tsx" isEdit="true" isQuickEdit="true" isMerged="true" import { GlobeToMapTransform } from '@/components/globe-to-map-transform'; export default function Home() { return (

Globe To Map Transform

Interactive visualization that smoothly transforms a 3D globe into a 2D equirectangular map.

Controls: "Unroll Globe" to transition to map view, "Roll to Globe" to return, and "Reset" to clear rotation.

); } [V0_FILE]json:file="package.json" isEdit="true" isMerged="true" { "name": "globe-map-transform", "version": "0.1.0", "private": true, "scripts": { "dev": "next dev", "build": "next build", "start": "next start", "lint": "next lint" }, "dependencies": { "next": "15.0.0", "react": "^18", "react-dom": "^18", "d3": "^7.8.5", "@radix-ui/react-slider": "^1.1.2", "class-variance-authority": "0.7.1", "clsx": "2.1.1", "lucide-react": "0.544.0", "tailwind-merge": "3.3.1", "tailwindcss-animate": "1.0.7", "topojson-client": "3.1.0" }, "devDependencies": { "typescript": "^5", "@types/node": "^20", "@types/react": "^18", "@types/react-dom": "^18", "@types/d3": "^7.4.3", "@types/topojson-client": "^3.1.4", "tailwindcss": "^4.1.9", "postcss": "8.5.6" } } [V0_FILE]typescriptreact:file="components/globe-to-map-transform.tsx" isEdit="true" isQuickEdit="true" "use client" import type React from "react" import { useEffect, useRef, useState } from "react" import * as d3 from "d3" import { feature } from "topojson-client" import { Button } from "@/components/ui/button" interface GeoFeature { type: string geometry: any properties: any } function interpolateProjection(raw0: any, raw1: any) { const mutate: any = d3.geoProjectionMutator((t: number) => (x: number, y: number) => { const [x0, y0] = raw0(x, y) const [x1, y1] = raw1(x, y) return [x0 + t * (x1 - x0), y0 + t * (y1 - y0)] }) let t = 0 return Object.assign((mutate as any)(t), { alpha(_: number) { return arguments.length ? (mutate as any)((t = +_)) : t }, }) } export function GlobeToMapTransform() { const svgRef = useRef(null) const [isAnimating, setIsAnimating] = useState(false) const [progress, setProgress] = useState([0]) const [worldData, setWorldData] = useState([]) const [rotation, setRotation] = useState([0, 0]) const [translation, setTranslation] = useState([0, 0]) const [isDragging, setIsDragging] = useState(false) const [lastMouse, setLastMouse] = useState([0, 0]) const width = 800 const height = 500 // Load world data useEffect(() => { const loadWorldData = async () => { try { // Using Natural Earth data from a CDN const response = await fetch("https://cdn.jsdelivr.net/npm/world-atlas@2/countries-110m.json") const world: any = await response.json() const countries = feature(world, world.objects.countries).features setWorldData(countries) console.log("[v0] Successfully loaded world data with", countries.length, "countries") } catch (error) { console.log("[v0] Error loading world data:", error) // Fallback: create a simple world outline const fallbackData = [ { type: "Feature", geometry: { type: "Polygon", coordinates: [ [ [-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90], ], ], }, properties: {}, }, ] setWorldData(fallbackData) } } loadWorldData() }, []) const handleMouseDown = (event: React.MouseEvent) => { setIsDragging(true) const rect = svgRef.current?.getBoundingClientRect() if (rect) { setLastMouse([event.clientX - rect.left, event.clientY - rect.top]) } } const handleMouseMove = (event: React.MouseEvent) => { if (!isDragging) return const rect = svgRef.current?.getBoundingClientRect() if (!rect) return const currentMouse = [event.clientX - rect.left, event.clientY - rect.top] const dx = currentMouse[0] - lastMouse[0] const dy = currentMouse[1] - lastMouse[1] const t = progress[0] / 100 if (t < 0.5) { // Globe mode - rotate const sensitivity = 0.5 // NOTE: flip horizontal sign so dragging right rotates globe to the right setRotation((prev) => [prev[0] + dx * sensitivity, Math.max(-90, Math.min(90, prev[1] - dy * sensitivity))]) } else { // Map mode - rotate the projection (not simple pan) // This updates the projection.rotate(...) used when in equirectangular mode. const sensitivityMap = 0.25 // lower sensitivity for longitude/latitude rotation setRotation((prev) => [prev[0] + dx * sensitivityMap, Math.max(-90, Math.min(90, prev[1] - dy * sensitivityMap))]) } setLastMouse(currentMouse) } const handleMouseUp = () => { setIsDragging(false) } // Initialize and update visualization useEffect(() => { if (!svgRef.current || worldData.length === 0) return const svg = d3.select(svgRef.current) svg.selectAll("*").remove() const t = progress[0] / 100 const alpha = Math.pow(t, 0.5) // Ease-out for smoother animation const scale = d3.scaleLinear().domain([0, 1]).range([200, 120]) const baseRotate = d3.scaleLinear().domain([0, 1]).range([0, 0]) const projection = interpolateProjection(d3.geoOrthographicRaw, d3.geoEquirectangularRaw) .scale(scale(alpha)) .translate([width / 2 + translation[0], height / 2 + translation[1]]) .rotate([baseRotate(alpha) + rotation[0], rotation[1]]) .precision(0.1) // Set the interpolation parameter projection.alpha(alpha) // Create path generator const path = d3.geoPath(projection) // Add graticule (grid lines) above ocean fill but below countries try { const graticule = d3.geoGraticule() const graticulePath = path(graticule()) if (graticulePath) { svg .append("path") .datum(graticule()) .attr("d", graticulePath) .attr("fill", "none") .attr("stroke", "#cccccc") .attr("stroke-width", 1) .attr("opacity", 0.2) } } catch (error) { console.log("[v0] Error creating graticule:", error) } // Add countries svg .selectAll(".country") .data(worldData) .enter() .append("path") .attr("class", "country") .attr("d", (d) => { try { const pathString = path(d as any) if (!pathString) return "" if (typeof pathString === "string" && (pathString.includes("NaN") || pathString.includes("Infinity"))) { return "" } return pathString } catch (error) { console.log("[v0] Error generating path for country:", error) return "" } }) .attr("fill", "none") .attr("stroke", "#cccccc") .attr("stroke-width", 1.0) .attr("opacity", 1.0) .style("visibility", function () { const pathData = d3.select(this).attr("d") return pathData && pathData.length > 0 && !pathData.includes("NaN") ? "visible" : "hidden" }) // hover handlers removed to keep country borders style constant // Draw sphere outline on top so the map border overlays countries try { const sphereOutline = path({ type: "Sphere" }) if (sphereOutline) { svg .append("path") .datum({ type: "Sphere" }) .attr("d", sphereOutline) .attr("fill", "none") .attr("stroke", "#222222") .attr("stroke-width", 1) .attr("opacity", 1.0) } } catch (error) { console.log("[v0] Error creating sphere outline:", error) } console.log("[v0] Visualization updated with progress:", progress[0]) }, [worldData, progress, rotation, translation]) const handleAnimate = () => { if (isAnimating) return setIsAnimating(true) const startProgress = progress[0] const endProgress = startProgress === 0 ? 100 : 0 const duration = 2000 const startTime = Date.now() const animate = () => { const elapsed = Date.now() - startTime const t = Math.min(elapsed / duration, 1) // Smooth easing function const eased = t < 0.5 ? 2 * t * t : -1 + (4 - 2 * t) * t const currentProgress = startProgress + (endProgress - startProgress) * eased setProgress([currentProgress]) if (t < 1) { requestAnimationFrame(animate) } else { setIsAnimating(false) } } animate() } const handleSliderChange = (value: number[]) => { if (!isAnimating) { setProgress(value) } } const handleReset = () => { setRotation([0, 0]) setTranslation([0, 0]) } return (

) } [V0_FILE]typescriptreact:file="components/ui/slider.tsx" isDeleted="true" "use client" import * as React from "react" import * as SliderPrimitive from "@radix-ui/react-slider" import { cn } from "@/lib/utils" const Slider = React.forwardRef< React.ElementRef, React.ComponentPropsWithoutRef >(({ className, ...props }, ref) => ( )) Slider.displayName = SliderPrimitive.Root.displayName export { Slider }84:["$","$L8c",null,{"chatId":"c5WLlHB3hZO","children":["$","$L8d",null,{"data":{"@\"active-block\",\"c5WLlHB3hZO\",":{"id":"b_I77HHnrYRj1","messageId":"v4oJSv6cjUr3tSnOxwQi5tLt2CG6rmNE","source":"$8e","language":"typescriptreact","type":"code-project","closed":true,"meta":{"id":"globe-map-transform","type":"code-project","project":"globe-map-transform","taskNameActive":"Fixing button contrast","taskNameComplete":"Fixed button contrast"},"hasSourceBeenEdited":false,"forkedFromBlockId":"$undefined"},"@\"chat:vm-mode\",\"c5WLlHB3hZO\",":false,"":null},"children":"$L8f"}]}]

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