2f:T527,viewof worldParameters = { // rX, rY, rZ const controller = view`

Rotation in X: ${[ "rX", Inputs.range([-Math.PI / 2, Math.PI / 2], { value: (-Math.PI * 3) / 16, step: Math.PI / 32 }) ]}

Rotation in Y: ${[ "rY", Inputs.range([-Math.PI / 2, Math.PI / 2], { value: 0, step: Math.PI / 32 }) ]}

Rotation in Z: ${[ "rZ", Inputs.range([-Math.PI, Math.PI], { value: -Math.PI / 4, step: Math.PI / 128 }) ]}

Shift in X: ${[ "mx", Inputs.range([-100, 100], { value: 0, step: 1 }) ]}

Shift in Y: ${[ "my", Inputs.range([-100, 100], { value: 0, step: 1 }) ]}

Shift in Z: ${[ "mz", Inputs.range([-100, 100], { value: 0, step: 1 }) ]}

Move Camera in X: ${[ "cx", Inputs.range([-100, 100], { value: 0, step: 1 }) ]}

Move Camera in Y: ${[ "cy", Inputs.range([-100, 100], { value: 2, step: 1 }) ]}

Move Camera in Z: ${[ "cz", Inputs.range([-100, 100], { value: 0, step: 1 }) ]}

`; return controller; }30:T557,viewof perspectiveParameters = { // near, zRange, eyeGap, scale const controller = view`

Camera Offset: ${[ "cameraOffset", Inputs.range([10, 1000], { value: 40, step: 10 }) ]}

Near (i.e. distance in front of the carema where we start projecting, aka. the projection plane): ${[ "near", Inputs.range([10, 40], { value: 10, step: 1 }) ]}

zRange (Far - Near) - i.e. how far past the projection plane to include: ${[ "zRange", Inputs.range([1, 40], { value: 15, step: 1 }) ]}

Eye Gap: ${[ "eyeGap", Inputs.range([0, 4], { value: 0.8, step: 0.01 }) ]}

Scale: ${[ "scale", Inputs.range([1, 20001], { value: 3800, step: 10 }) ]}

Horizontal Shift Window: ${[ "horizontalShift", Inputs.range([-10, 10], { value: 0, step: 0.1 }) ]}

Vertical Shift Window: ${[ "verticalShift", Inputs.range([-10, 10], { value: 0, step: 0.1 }) ]}

Shift in X': ${[ "xprime", Inputs.range([-500, 500], { value: 0, step: 1 }) ]}

Shift in Y': ${[ "yprime", Inputs.range([-500, 500], { value: 0, step: 1 }) ]}

`; return controller; }31:T56f,getElevationData = (boundingBox, width, height) => { const canvas = DOM.canvas(width, height); const context = canvas.getContext("2d"); const path = d3.geoPath(projection, context); context.fillStlye = "rgb(255,255,255)"; context.fillRect(0, 0, width, height); // context.save(); // context.fillStlye = "rgb(0,0,0)"; demData.map((d, i) => { let dx = (d.x + tiles.translate[0]) * tiles.scale; let dy = (d.y + tiles.translate[1]) * tiles.scale; const imageData = new ImageData(d.data, tileSize, tileSize); context.putImageData(imageData, dx, dy, 0, 0, tileDim, tileDim); }); // context.fillStyle = "rgb(255,255,255)"; // context.beginPath(), path(diff), context.fill(); shuffle.map((d) => { let mx = (d.x + tiles.translate[0]) * tiles.scale; let my = (d.y + tiles.translate[1]) * tiles.scale; //context.fillStyle = `rgb(${lowest_pixel.r}, ${lowest_pixel.g}, ${lowest_pixel.b})`; //context.fillStyle = "rgb(1, 134,160)"; context.fillStlye = "rgb(0,0,0)"; context.fillRect(mx, my, tileSize, tileSize); }); const rawData = context.getImageData(0, 0, width, height).data; console.log("RAW", rawData); const heightData = convertToHeight(rawData); let extent = d3.extent(heightData); //console.log(extent); const outData = []; while (heightData.length) outData.push(heightData.splice(0, width)); return outData; }32:T514,scene = { let scene = []; let scale = 0.075; //const allRings = [] isolines.forEach((lvl, i) => { //lvl.lines.forEach((isoline) => { //const lvl = isolines[levelIndex] lvl.lines.forEach((isoline) => { let entity = simplify( isoline.map((d) => { return { x: d[0], y: d[1] }; }), lineSimplification ).map((c) => { let copy = [xScale(c.x), yScale(c.y), zScale(lvl.threshold), 1]; return copy; }); entity.closed = true; entity.fillColor = "white"; entity.fillOpacity = 0.1; entity.strokeWidth = 0.5; entity.groupname = `group${lvl.threshold}`; scene.push(entity); }); }); // scene.push(label); // const east = [[14, 0, terrainExaggeration / 2, 1]]; // east.text = "E"; // east.textAnchor = "middle"; // const west = [[-14, 0, terrainExaggeration / 2, 1]]; // west.text = "W"; // west.textAnchor = "middle"; // const south = [[0, 14, terrainExaggeration / 2, 1]]; // south.text = "S"; // south.textAnchor = "middle"; // const north = [[0, -14, terrainExaggeration / 2, 1]]; // north.text = "N"; // north.textAnchor = "middle"; // scene.push(north); // scene.push(south); // scene.push(east); // scene.push(west); return scene; }33:T7d9,anaglyphRenderer = (processedScene) => { var t0 = performance.now(); const leftLayer = []; const rightLayer = []; const behindProjectionPlane = (item) => { return item.map((points) => { points.map((d) => d[0][2]).find((d) => d <= 0) === undefined && points.map((d) => d[1][2]).find((d) => d <= 0) === undefined; }); return true; }; let allLeftPath = ""; let allRightPath = ""; const svgStuff = processedscene_layer.map((m) => { leftLayer.push( svg`${m.values .filter(behindProjectionPlane) .map((item) => { const leftPath = "M " + item.map((p) => `${p[0][0]} ${p[0][1]}`).join(" L ") + (item.closed ? " Z" : ""); const rightPath = "M " + item.map((p) => `${p[1][0]} ${p[1][1]}`).join(" L ") + (item.closed ? " Z" : ""); // allLeftPath += ' ' + leftPath // allRightPath += ' ' + rightPath return svg``; })}` ); }); // if (allLeftPath !== '') { // leftLayer.push(svg``) // } // if (allRightPath !== '') { // rightLayer.push(svg``) // } var t1 = performance.now(); console.log(`renderer: ${t1 - t0}`); return svg` ${rightLayer} ${leftLayer} `; 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2d:{"title":"New Terrain Anaglyphs","cells":[{"id":0,"value":"md`# New Terrain Anaglyphs\n\nI don't love this approach but: given an arbitrary geojson, create an image of RGB terrain tiles stitched together, turn that into a standalone image, and turn that image into an anaglyph. An unholy butchering of [Tony Chu](https://observablehq.com/@tonyhschu/anaglyph-isobands-terrain)'s masterful work.`","pinned":false,"hidden":false,"mode":"ojs"},{"id":4266,"value":"//if you want to use a different file use the file upload thing and change this to file.json()\nboundsfile = sprucepine03","pinned":true,"hidden":false,"mode":"ojs"},{"id":8566,"value":"sprucepine03 = FileAttachment(\"sprucepine03.geojson\").json()","pinned":true,"hidden":false,"mode":"ojs"},{"id":7709,"value":"boundingBox = turf.bbox(boundsfile)","pinned":true,"hidden":false,"mode":"ojs"},{"id":4343,"value":"viewof file = Inputs.file({ label: \"Upload geoJSON\" })","pinned":true,"hidden":false,"mode":"ojs"},{"id":5818,"value":"terrainMap = {\n const el = svg``;\n\n let isMouseDown = false;\n\n return Object.assign(el, {\n onmousedown: (event) => {\n isMouseDown = true;\n },\n onmousemove: (event) => {\n if (isMouseDown === false) return;\n\n event.preventDefault();\n\n const newRZ = -Math.PI + (event.layerX / width) * 2 * Math.PI;\n const newRX = -Math.PI / 2 + ((event.layerY / height) * Math.PI) / 2;\n\n const newWorldParams = {\n ...worldParameters,\n rZ: newRZ,\n rX: newRX\n };\n\n const params = {\n ...perspectiveParameters,\n ...newWorldParams\n };\n\n el.querySelectorAll(\"*\").forEach((n) => n.remove());\n el.append(anaglyphRenderer(processScene(scene, params)));\n },\n onmouseup: (event) => {\n isMouseDown = false;\n }\n });\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":5914,"value":"$2f","pinned":false,"hidden":false,"mode":"ojs"},{"id":5763,"value":"viewof terrainExaggeration = Inputs.range([0.25, 10], {\n value: 1.75,\n step: 0.25,\n label: \"Terrain Exaggeration\"\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":5806,"value":"viewof lineSimplification = Inputs.range([0.1, 3], {\n value: 0.2,\n step: 0.1,\n label: \"Line Simplification\"\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":5906,"value":"$30","pinned":false,"hidden":false,"mode":"ojs"},{"id":5754,"value":"levels = 50","pinned":true,"hidden":false,"mode":"ojs"},{"id":7733,"value":"projection = {\n function floor(k) {\n return Math.pow(2, Math.floor(Math.log(k) / Math.LN2));\n }\n\n var pi = Math.PI,\n tau = 2 * pi;\n\n var projection = d3\n .geoMercator()\n .scale(1 / tau)\n .translate([0, 0]);\n\n var bounds = [\n [boundingBox[0], boundingBox[3]],\n [boundingBox[2], boundingBox[1]]\n ],\n p0 = projection([bounds[0][0], bounds[1][1]]),\n p1 = projection([bounds[1][0], bounds[0][1]]);\n\n // Convert this to a scale k and translate tx, ty for the projection.\n // For crisp image tiles, clamp to the nearest power of two.\n var k = floor(\n 0.95 / Math.max((p1[0] - p0[0]) / width, (p1[1] - p0[1]) / height)\n ),\n tx = (width - k * (p1[0] + p0[0])) / 2,\n ty = (height - k * (p1[1] + p0[1])) / 2;\n\n projection.scale(k / tau).translate([tx, ty]);\n\n return projection;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":8415,"value":"alltiles = turf.dissolve(\n turf.featureCollection(\n tiles\n .map((t) => tilebelt.tileToGeoJSON([t.x, t.y, t.z]))\n .map((m) => {\n return { type: \"Feature\", geometry: m };\n })\n )\n)","pinned":true,"hidden":false,"mode":"ojs"},{"id":7731,"value":"tiles = d3\n .tile()\n .size([width, height])\n .scale(projection.scale() * 2 * Math.PI)\n .translate(projection.translate())()","pinned":false,"hidden":false,"mode":"ojs"},{"id":8223,"value":"xyz_tiles = xyz(\n [\n [boundingBox[0], boundingBox[1]],\n [boundingBox[2], boundingBox[3]]\n ],\n 8\n).map((t) => {\n t.dimensions = tilebelt.tileToGeoJSON([t.x, t.y, t.z]);\n return t;\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":8249,"value":"tiles.translate","pinned":true,"hidden":false,"mode":"ojs"},{"id":8254,"value":"(xyz_tiles.scale = 256)","pinned":true,"hidden":false,"mode":"ojs"},{"id":8246,"value":"(xyz_tiles.translate = alt_projection.translate())","pinned":true,"hidden":false,"mode":"ojs"},{"id":8233,"value":"alt_projection = d3\n .geoMercator()\n .center(turf.center(boundsfile).geometry.coordinates)\n //.translate([0, 0])\n //.scale(Math.pow(2, 21) / (2 * Math.PI))\n .fitExtent(\n [\n [0, 0],\n [width, height]\n ],\n turf.rewind(boundsfile, { reverse: true })\n )\n//.fitSize([width, height], turf.rewind(boundsfile, { reverse: true }))","pinned":true,"hidden":false,"mode":"ojs"},{"id":8014,"value":"altsize = Math.ceil(Math.sqrt(xyz_tiles.length) * 256)","pinned":true,"hidden":false,"mode":"ojs"},{"id":7745,"value":"demData = Promise.all(\n tiles.map(async (t) => {\n t.data = await getDemData(t);\n console.log(t);\n return t;\n })\n)","pinned":false,"hidden":false,"mode":"ojs"},{"id":7748,"value":"merged_demData = demData.map((d) => Array.from(d.data)).flat()","pinned":false,"hidden":false,"mode":"ojs"},{"id":7750,"value":"rgbarr = {\n let arr = [];\n for (var n = 0, l = merged_demData.length; n < l / 4; n++) {\n arr.push({\n r: merged_demData[n * 4],\n g: merged_demData[n * 4 + 1],\n b: merged_demData[n * 4 + 2],\n a: merged_demData[n * 4 + 3],\n h:\n -10000 +\n (merged_demData[n * 4] * 256 * 256 +\n merged_demData[n * 4 + 1] * 256 +\n merged_demData[n * 4 + 2]) *\n 0.1\n });\n }\n return arr;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":5709,"value":"tileSize = 256","pinned":true,"hidden":false,"mode":"ojs"},{"id":7761,"value":"tileDim = 256","pinned":true,"hidden":false,"mode":"ojs"},{"id":5719,"value":"gridSize = tileSize + 1","pinned":true,"hidden":false,"mode":"ojs"},{"id":21,"value":"height = 1200","pinned":true,"hidden":false,"mode":"ojs"},{"id":5706,"value":"width = 1200","pinned":true,"hidden":false,"mode":"ojs"},{"id":5733,"value":"heightExtent = rgbextent","pinned":true,"hidden":false,"mode":"ojs"},{"id":8490,"value":"palestine_full_no_golan = FileAttachment(\"palestine_full_no_golan.geojson\").json()","pinned":true,"hidden":false,"mode":"ojs"},{"id":7908,"value":"sealevel = -0.6999999999989086","pinned":true,"hidden":false,"mode":"ojs"},{"id":7888,"value":"revisedExtent = d3.extent(ele.flat())","pinned":true,"hidden":false,"mode":"ojs"},{"id":7822,"value":"rgbextent = d3.extent(rgbarr.map((r) => r.h))","pinned":true,"hidden":false,"mode":"ojs"},{"id":7753,"value":"lowest_pixel = rgbarr.sort((a, b) => a.h - b.h)[0]","pinned":true,"hidden":false,"mode":"ojs"},{"id":7779,"value":"shuffle = tiles.sort(() => 0.5 - Math.random()).slice(1, tiles.length * 0.2)","pinned":true,"hidden":false,"mode":"ojs"},{"id":5742,"value":"TwoDimensionsChart = {\n const levels = isolines.map((lvl) => {\n const rings = lvl.lines.map((isoline) => {\n const path = d3.line()(isoline);\n\n return svg``;\n });\n\n return svg`${rings}`;\n });\n\n return svg``;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":7770,"value":"$31","pinned":false,"hidden":false,"mode":"ojs"},{"id":8155,"value":"getDemData = function ({ x, y, z }) {\n const url = `https://api.mapbox.com/v4/mapbox.terrain-rgb/${z}/${x}/${y}.pngraw?access_token=${mapbox}`;\n\n return new Promise((resolve, reject) => {\n const image = new Image();\n image.crossOrigin = \"anonymous\";\n image.onerror = reject;\n image.src = url;\n\n image.onload = () => {\n const canvas = DOM.canvas(tileSize, tileSize);\n const ctx = canvas.getContext(\"2d\");\n\n ctx.drawImage(\n image,\n 0,\n 0,\n image.width,\n image.height,\n 0,\n 0,\n tileDim,\n tileDim\n );\n const rawData = ctx.getImageData(0, 0, image.width, image.height).data;\n resolve(rawData);\n };\n });\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":7814,"value":"(tiles[0].x + tiles.translate[0]) * tiles.scale","pinned":true,"hidden":false,"mode":"ojs"},{"id":7537,"value":"ele = getElevationData(turf.bbox(boundsfile), height, width)","pinned":true,"hidden":false,"mode":"ojs"},{"id":5731,"value":"size = Math.sqrt(rgbarr.length)","pinned":true,"hidden":false,"mode":"ojs"},{"id":8137,"value":"heightExtent[1] - heightExtent[0]","pinned":true,"hidden":false,"mode":"ojs"},{"id":5735,"value":"heightThresholds = {\n const range = heightExtent[1] - heightExtent[0];\n const targetBand = Math.floor(range / levels);\n const numOfBands = Math.ceil(range / targetBand);\n const bandDelta = Math.round(range / numOfBands / targetBand) * targetBand;\n\n const minHeight = Math.max(heightExtent[0], rgbextent[0]);\n\n return d3.range(numOfBands).map((i) => {\n return Math.ceil(minHeight) + i * bandDelta;\n });\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":5740,"value":"isolines = {\n return heightThresholds.map((lower) => {\n return {\n lines: MarchingSquares.isoBands(ele, lower, heightExtent[1] + 1, {\n noFrame: false,\n linearRing: true\n }),\n threshold: lower\n };\n });\n // .filter((d) => {\n // return d.lines.length > 0;\n // });\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":8118,"value":"northbend = FileAttachment(\"northbend.geojson\").json()","pinned":true,"hidden":false,"mode":"ojs"},{"id":5757,"value":"xScale = d3.scaleLinear().domain([0, size]).range([-10, 10])","pinned":true,"hidden":false,"mode":"ojs"},{"id":5759,"value":"yScale = d3.scaleLinear().domain([0, size]).range([-10, 10])","pinned":true,"hidden":false,"mode":"ojs"},{"id":5765,"value":"zScale = d3.scaleLinear().domain(heightExtent).range([0, terrainExaggeration])","pinned":true,"hidden":false,"mode":"ojs"},{"id":5767,"value":"edges = Object.assign({\n top: ele[0],\n bottom: ele[ele.length - 1],\n left: ele.map((r) => r[0]),\n right: ele.map((r) => r[ele.length - 1])\n})","pinned":true,"hidden":false,"mode":"ojs"},{"id":5793,"value":"parameters = Object.assign({ ...worldParameters, ...perspectiveParameters })","pinned":true,"hidden":false,"mode":"ojs"},{"id":5782,"value":"projectedIsobands = {\n const shapes = [];\n\n isolines.forEach((lvl, i) => {\n //lvl.lines.forEach((isoline) => {\n //const lvl = isolines[levelIndex]\n lvl.lines.forEach((isoline) => {\n let entity = simplify(\n isoline.map((d) => {\n return { x: d[0], y: d[1] };\n }),\n lineSimplification\n ).map((c) => {\n let copy = [xScale(c.x), yScale(c.y), zScale(lvl.threshold), 1];\n\n return copy;\n });\n\n entity.closed = true;\n entity.fillColor = \"white\";\n entity.fillOpacity = 0.3;\n entity.strokeWidth = 0.5;\n entity.level = i;\n entity.elevation = lvl.threshold;\n\n shapes.push(entity);\n });\n });\n\n return processScene(shapes, parameters);\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":5810,"value":"$32","pinned":true,"hidden":false,"mode":"ojs"},{"id":5822,"value":"processedScene = {\n var t0 = performance.now();\n const result = processScene(scene, parameters);\n var t1 = performance.now();\n\n console.log(`processor: ${t1 - t0}`);\n\n return result;\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":5825,"value":"processedscene_layer = d3\n .nest()\n .key((d) => d.groupname)\n .entries(processedScene)\n .map((m) => {\n m.values.flat();\n return m;\n })","pinned":true,"hidden":false,"mode":"ojs"},{"id":5813,"value":"$33","pinned":true,"hidden":false,"mode":"ojs"},{"id":5804,"value":"import {\n renderer,\n processScene\n} with { height } from \"@tonyhschu/anaglyph-pipeline-in-gpujs\"","pinned":true,"hidden":false,"mode":"ojs"},{"id":5677,"value":"import { rasterize } from \"@mbostock/saving-svg\"","pinned":true,"hidden":false,"mode":"ojs"},{"id":5506,"value":"canvas = async (t) => {\n let img = new Image();\n img.crossOrigin = \"anonymous\";\n img.src = url(t);\n await new Promise((resolve) => img.addEventListener(\"load\", resolve));\n let ctx = DOM.canvas(img.width, img.height).getContext(\"2d\");\n ctx.drawImage(img, 0, 0);\n return ctx.canvas;\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":5302,"value":"url = (t) =>\n `https://api.mapbox.com/v4/mapbox.terrain-rgb/${t.z}/${t.x}/${t.y}.png?access_token=${mapbox}`","pinned":true,"hidden":false,"mode":"ojs"},{"id":4329,"value":"## Libraries","pinned":false,"hidden":false,"mode":"md"},{"id":6205,"value":"import { drawGrid } from \"@mourner/martin-real-time-rtin-terrain-mesh\"","pinned":true,"hidden":false,"mode":"ojs"},{"id":17,"value":"d3 = require(\"d3-geo@1\", \"d3-selection@1\", \"d3-fetch@1\", \"d3-tile@0.0\", \"d3-scale@2.1.2\", \"d3-collection@latest\", \"d3-array@3\", \"d3\", \"d3-color\")","pinned":true,"hidden":false,"mode":"ojs"},{"id":44,"value":"path = d3.geoPath(projection)","pinned":true,"hidden":false,"mode":"ojs"},{"id":612,"value":"turf = require(\"@turf/turf@latest\")","pinned":true,"hidden":false,"mode":"ojs"},{"id":2804,"value":"xyz = require(\"https://bundle.run/xyz-affair@0.9.1\")","pinned":true,"hidden":false,"mode":"ojs"},{"id":5368,"value":"tilebelt = import(\"https://cdn.skypack.dev/@mapbox/tilebelt@1.0.2?min\")","pinned":true,"hidden":false,"mode":"ojs"},{"id":5661,"value":"mapbox = \"pk.eyJ1IjoibGlmZXdpbm5pbmciLCJhIjoiY2t6bXA2dWZlMmtzbTJ2bjJ0ZTdwYnoyNyJ9.cF_Xt3B9htHIUD0lAKXaRg\"","pinned":true,"hidden":false,"mode":"ojs"},{"id":5738,"value":"MarchingSquares = import(\n \"https://unpkg.com/marchingsquares@1.3.3/dist/marchingsquares-esm.js?module\"\n)","pinned":true,"hidden":false,"mode":"ojs"},{"id":5800,"value":"simplify = require(\"simplify-js\")","pinned":true,"hidden":false,"mode":"ojs"},{"id":5908,"value":"import { view } from \"@tomlarkworthy/view\"","pinned":true,"hidden":false,"mode":"ojs"},{"id":7535,"value":"import { convertToHeight } from \"@dvreed77/tiled-elevation-data\"","pinned":true,"hidden":false,"mode":"ojs"}],"files":"$W34","stdlib":"1","titling":"auto"}