function createPath(scale){
var c = 0.55191502449;
var ellipseCurvePath = new THREE.CurvePath();
ellipseCurvePath.add(new THREE.CubicBezierCurve3(
new THREE.Vector3( 0, 1, 0 ).multiplyScalar(scale),
new THREE.Vector3( c, 1, 0 ).multiplyScalar(scale),
new THREE.Vector3( 1, c, 0 ).multiplyScalar(scale),
new THREE.Vector3( 1, 0, 0 ).multiplyScalar(scale)
));
ellipseCurvePath.add(new THREE.CubicBezierCurve3(
new THREE.Vector3( 1, 0, 0 ).multiplyScalar(scale),
new THREE.Vector3( 1, -c, 0 ).multiplyScalar(scale),
new THREE.Vector3( c, -1, 0 ).multiplyScalar(scale),
new THREE.Vector3( 0, -1, 0 ).multiplyScalar(scale)
));
ellipseCurvePath.add(new THREE.CubicBezierCurve3(
new THREE.Vector3( 0, -1, 0 ).multiplyScalar(scale),
new THREE.Vector3( -c, -1, 0 ).multiplyScalar(scale),
new THREE.Vector3( -1, -c, 0 ).multiplyScalar(scale),
new THREE.Vector3( -1, 0, 0 ).multiplyScalar(scale)
));
ellipseCurvePath.add(new THREE.CubicBezierCurve3(
new THREE.Vector3( -1, 0, 0 ).multiplyScalar(scale),
new THREE.Vector3( -1, c, 0 ).multiplyScalar(scale),
new THREE.Vector3( -c, 1, 0 ).multiplyScalar(scale),
new THREE.Vector3( 0, 1, 0 ).multiplyScalar(scale)
));
ellipseCurvePath.closePath();
var geometryt = ellipseCurvePath.createPointsGeometry( 100 );
var line = new THREE.Line(geometryt, new THREE.LineBasicMaterial({color : '#FFF'}));
return {
line: line,
spline: ellipseCurvePath
};
}
generateGeometry(angle,wobble) {
var position = new THREE.Vector3(0,0,0)
var direction = new THREE.Vector3(0,0.1,0)
var velocity = 0.5*this.scale
var axis = new THREE.Vector3(0,0,1)
var axis2 = new THREE.Vector3(0,1,0)
var axis3 = new THREE.Vector3(1,0,0)
var savedPositions = []
var savedDirections = []
var level = 1
var skeletonPieces = []
var skeletonGeometry = new THREE.Geometry()
var symbol = ''
for (i = 0; i < this.string.length; i++){
symbol = this.string.charAt(i)
if (symbol === 'F'){
var numFs = 1
symbol = this.string.charAt(i+1)
while (symbol === 'F'){
numFs++
i++
symbol = this.string.charAt(i+1)
}
//draw forward
var newPosition = new THREE.Vector3()
newPosition.copy(position)
newPosition.addScaledVector(direction,velocity*numFs)
var segment = new THREE.LineCurve(position,newPosition)
segment.level = level
skeletonPieces.push(segment)
position = newPosition
}
else if (symbol === 'L'){
if (Math.random()>2/level){
var leaf = new Leaf(position,direction,this.prototypeLeafGeometry)
this.leaves.push(leaf.geometry)
}
}
else if (symbol === '-'){
//turn left
direction.applyAxisAngle(axis,-angle)
}
else if (symbol === '+'){
//turn right
direction.applyAxisAngle(axis,angle)
}
else if (symbol === '['){
//save position and angle
level+=1
var savedPosition = new THREE.Vector3()
savedPosition.copy(position)
savedPositions.push(savedPosition)
var savedDirection = new THREE.Vector3()
savedDirection.copy(direction)
savedDirections.push(savedDirection)
}
else if (symbol === ']'){
//draw leaf
//recall position and angle
level-=1
position = savedPositions.pop()
direction = savedDirections.pop()
axis.applyAxisAngle(axis2,wobble)
axis.applyAxisAngle(axis3,wobble)
}
}
//now build by level
var length = 0
i = 0
console.log(skeletonPieces.length)
while(i < skeletonPieces.length){
length = 0
var branchPath = new THREE.CurvePath()
level = skeletonPieces[i].level
while(i<skeletonPieces.length && skeletonPieces[i].level === level){
branchPath.add(skeletonPieces[i])
length++
i++
}
skeletonGeometry.merge(new THREE.TubeGeometry(branchPath,
length, //segments
this.scale*0.2/level, //radius
12, //radius segments
false //closed
))
}
//add color
var numFaces = skeletonGeometry.faces.length
for (var i = 0; i < numFaces; i++){
// var hue = parseInt(i/numFaces)
var hue = i/numFaces
var saturation = 1
var color = new THREE.Color()
color.setHSL(hue,saturation,0.5)
skeletonGeometry.faces[i].color = color
}
skeletonGeometry.colorsNeedUpdate = true
this.skeletonGeometry = skeletonGeometry
// this.leafGeometry = leafGeometry
}