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Last active August 17, 2017 00:43
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Create 6 gnomonic cube faces from a WGS84 input geotiff, render in three.js
var cubeSphere = new CubeSphere({
parent: PARENT, // scene or Object3D
scale: 1, // in case scaling according to other objects in scene
radius: 5, // size of sphere
textureFaces: [
new THREE.ImageUtils.loadTexture(04.jpg),
new THREE.ImageUtils.loadTexture(03.jpg),
new THREE.ImageUtils.loadTexture(05.jpg),
new THREE.ImageUtils.loadTexture(06.jpg),
new THREE.ImageUtils.loadTexture(02.jpg),
new THREE.ImageUtils.loadTexture(01.jpg)
]
})
# requres gdal cli installed
# run like this:
# python processWGS84intoGnomonicFaces.py input-geotiff.tif
import subprocess
import sys
inputFile = sys.argv[-1]
outputPath = "/path/to/faces/"
cmd = """\
gdalwarp -wo SOURCE_EXTRA=500 -wo SAMPLE_GRID=YES -te -6378137 -6378137 6378137 6378137 \
-t_srs "+proj=gnom +lon_0={lon} +lat_0={lat} +datum=WGS84" \
-tr 5000 5000 -overwrite {inputFile} /tmp/tmp.tif && \
convert /tmp/tmp.tif -resize 512x512 {outputPath}{filename} && \
rm /tmp/tmp.tif \
"""
cmd1 = cmd.format(lon=0, lat=0, inputFile=inputFile, outputPath=outputPath, filename="01.jpg")
subprocess.call(cmd1, shell=True)
cmd2 = cmd.format(lon=180, lat=0, inputFile=inputFile, outputPath=outputPath, filename="02.jpg")
subprocess.call(cmd2, shell=True)
cmd3 = cmd.format(lon=90 ,lat=0, inputFile=inputFile, outputPath=outputPath, filename="03.jpg")
subprocess.call(cmd3, shell=True)
cmd4 = cmd.format(lon=-90, lat=0, inputFile=inputFile, outputPath=outputPath, filename="04.jpg")
subprocess.call(cmd4, shell=True)
cmd5 = cmd.format(lon=0, lat=90, inputFile=inputFile, outputPath=outputPath, filename="05.jpg")
subprocess.call(cmd5, shell=True)
cmd6 = cmd.format(lon=0, lat=-90, inputFile=inputFile, outputPath=outputPath, filename="06.jpg")
subprocess.call(cmd6, shell=True)
import * as THREE from 'three'
class CubeSphere {
constructor(opts) {
this.parent = null
this.scale = 1;
this.radius = 30;
this.segments = 32
this.depth = true;
this.transparent = false;
Object.assign(this, opts);
// this.drawLine()
this.init()
}
init() {
this.cubeSphereMaterial = this.createCubeFaceMaterial()
this.cubeGeometry = new THREE.BoxGeometry(this.radius * this.scale, this.radius * this.scale, this.radius * this.scale, this.segments, this.segments, this.segments);
// this.cubeGeometry.scale(1200, 1200, 1200)
for (var i in this.cubeGeometry.vertices) {
var vertex = this.cubeGeometry.vertices[i];
vertex.setLength(this.radius * this.scale);
// vertex.normalize().multiplyScalar(this.RADIUS);
}
// geometry.makeGroups();
this.cubeGeometry.computeVertexNormals()
this.cubeGeometry.computeFaceNormals();
this.cubeGeometry.computeMorphNormals();
this.cubeGeometry.computeBoundingSphere();
this.cubeGeometry.computeBoundingBox();
this.cubeGeometry.computeLineDistances();
// this.cubeGeometry.computeTangents();
this.cubeGeometry.verticesNeedUpdate = true;
this.cubeGeometry.elementsNeedUpdate = true;
this.cubeGeometry.uvsNeedUpdate = true;
this.cubeGeometry.normalsNeedUpdate = true;
this.cubeGeometry.tangentsNeedUpdate = true;
this.cubeGeometry.colorsNeedUpdate = true;
this.cubeGeometry.lineDistancesNeedUpdate = true;
this.cubeGeometry.buffersNeedUpdate = true;
this.cubeGeometry.groupsNeedUpdate = true;
this.cubeSphere = new THREE.Mesh(this.cubeGeometry, this.cubeSphereMaterial);
this.spheres = new THREE.Object3D(0, 0, 0);
// set sphere y at prime meridian
// accoridng to the cube projections, rotating 45 degrees centers otexn a seam, which is the prime meridian
var yAxis = new THREE.Vector3(0, 1, 0);
var oldVec = new THREE.Vector3(0, -45 * (Math.PI / 180), 0);
var newVec = oldVec.applyAxisAngle(yAxis, 180 * (Math.PI / 180));
// var newVec = oldVec.applyAxisAngle( xAxis, latRads )
// this.spheres.rotation.x = newVec.x
this.spheres.rotation.y = newVec.y
// this.spheres.add(this.glowSphereBack)
this.spheres.add(this.cubeSphere)
// this.createMappedSphere()
this.parent.add(this.spheres)
}
createCubeFaceMaterial() {
var _this = this;
var textureFaces = this.textureFaces;
var faces = textureFaces.map(function(textureFace, i) {
var face = new THREE.MeshPhongMaterial({
map: textureFaces[i],
color: new THREE.Color(0xffffff),
shininess: 0,
bumpScale: .5,
depthWrite: _this.depth,
depthTest: _this.depth,
// renderOrder: 111,
transparent: _this.transparent
// transparent: true,
// opacity: 1,
// needsUpdate: true
});
face.map.needsUpdate = true;
return face;
})
return faces;
}
}
export default CubeSphere;
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