import {VRSPACEUI} from './vrspace-ui.js';
/** UI to create floors, see {@link https://www.youtube.com/watch?v=8RxToSgtoko|this youtube video}.
Start recording, then edit, then save, either as js or json.
UI Buttons are bound to current camera.
*/
export class FloorRibbon {
/**
@param world a World to show in
@param size floor size, default 1 m
*/
constructor( world, size ) {
// parameters
this.world = world;
this.scene = world.scene;
if ( size ) {
this.size = size;
} else {
this.size = 1;
}
this.decimals = 2;
this.floorMaterial = new BABYLON.StandardMaterial("floorMaterial", this.scene);
this.floorMaterial.diffuseColor = new BABYLON.Color3(.5, 1, .5);
this.floorMaterial.backFaceCulling = false;
this.floorMaterial.alpha = 0.5;
// state variables
this.leftPath = [];
this.rightPath = [];
this.pathArray = [this.leftPath, this.rightPath];
this.left = BABYLON.MeshBuilder.CreateSphere("leftSphere", {diameter: 1}, scene);
this.right = BABYLON.MeshBuilder.CreateSphere("rightSphere", {diameter: 1}, scene);
this.left.isVisible = false;
this.right.isVisible = false;
scene.onActiveCameraChanged.add( (s) => this.cameraChanged() );
this.recording = false;
this.editing = false;
this.resizing = false;
this.floorCount = 0;
this.contentBase=VRSPACEUI.contentBase;
// required for Scene.pointerMovePredicate, resizing the ribbon
this.world.addSelectionPredicate(mesh=>this.isSelectableMesh(mesh));
}
cameraChanged() {
console.log("Camera changed: "+this.scene.activeCamera.getClassName()+" new position "+this.scene.activeCamera.position);
this.camera = this.scene.activeCamera;
this.left.parent = this.camera;
this.right.parent = this.camera;
}
/** Shows the UI */
showUI() {
this.recordButton = VRSPACEUI.hud.addButton("Start", this.contentBase+"/content/icons/play.png");
this.recordButton.onPointerDownObservable.add( () => this.startStopCancel());
this.editButton = VRSPACEUI.hud.addButton("Edit",this.contentBase+"/content/icons/edit.png");
this.editButton.onPointerDownObservable.add( () => this.edit());
this.jsonButton = VRSPACEUI.hud.addButton("JSON", this.contentBase+"/content/icons/download.png");
this.jsonButton.onPointerDownObservable.add( () => this.saveJson());
this.jsButton = VRSPACEUI.hud.addButton("JS", this.contentBase+"/content/icons/download.png");
this.jsButton.onPointerDownObservable.add( () => this.saveJs());
this.editButton.isVisible = false;
this.jsonButton.isVisible = false;
this.jsButton.isVisible = false;
}
startStopCancel() {
if ( this.floorMesh ) {
// cancel
this.floorMesh.dispose();
delete this.floorMesh;
this.leftPath = [];
this.rightPath = [];
this.pathArray = [ this.leftPath, this.rightPath ];
this.recordButton.text="Start";
} else {
this.recording = !this.recording;
if ( this.recording ) {
// start
this.startRecording();
this.recordButton.text="Pause";
} else {
// stop
this.createPath();
this.recordButton.text="Cancel";
}
}
this.updateUI();
}
updateUI() {
if ( this.recording ) {
this.recordButton.imageUrl = this.contentBase+"/content/icons/pause.png";
} else if ( this.floorMesh) {
this.recordButton.imageUrl = this.contentBase+"/content/icons/undo.png";
} else {
this.recordButton.imageUrl = this.contentBase+"/content/icons/play.png";
}
this.editButton.isVisible = !this.recording && this.floorMesh;
this.jsonButton.isVisible = !this.recording && this.floorMesh;
this.jsButton.isVisible = !this.recording && this.floorMesh;
}
trackActiveCamera() {
var camera = this.scene.activeCamera;
if ( camera ) {
this.trackCamera(camera);
}
}
startRecording() {
this.leftPath = [];
this.rightPath = [];
this.pathArray = [ this.leftPath, this.rightPath ];
this.trackActiveCamera();
}
trackCamera(camera) {
console.log("Tracking camera");
if ( camera ) {
this.camera = camera;
}
this.lastX = this.camera.position.x;
this.lastZ = this.camera.position.z;
this.observer = this.camera.onViewMatrixChangedObservable.add((c) => this.viewChanged(c));
this.left.parent = camera;
this.right.parent = camera;
var height = camera.ellipsoid.y*2;
if ( this.camera.getClassName() == 'WebXRCamera' ) {
var height = this.camera.realWorldHeight;
}
this.left.position = new BABYLON.Vector3(-1, -height, 0);
this.right.position = new BABYLON.Vector3(1, -height, 0);
}
viewChanged(camera) {
if (
camera.position.x > this.lastX + this.size ||
camera.position.x < this.lastX - this.size ||
camera.position.z > this.lastZ + this.size ||
camera.position.z < this.lastZ - this.size
) {
//console.log("Pos: "+camera.position);
//console.log("Pos left: "+this.left.absolutePosition+" right: "+this.right.absolutePosition);
this.lastX = camera.position.x;
this.lastZ = camera.position.z;
if ( this.recording ) {
this.leftPath.push( this.left.absolutePosition.clone() );
this.rightPath.push( this.right.absolutePosition.clone() );
}
}
}
createPath() {
if ( this.leftPath.length > 1 ) {
this.addToScene();
}
this.camera.onViewMatrixChangedObservable.remove(this.observer);
delete this.observer;
}
addToScene() {
//var floorGroup = new BABYLON.TransformNode("floorGroup");
//this.scene.addTransformNode( floorGroup );
this.floorCount++;
var floorMesh = BABYLON.MeshBuilder.CreateRibbon( "FloorRibbon"+this.floorCount, {pathArray: this.pathArray, updatable: true}, this.scene );
floorMesh.material = this.floorMaterial;
floorMesh.checkCollisions = false;
this.floorMesh = floorMesh;
}
isSelectableMesh(mesh) {
return mesh && this.floorMesh && this.floorMesh == mesh;
}
clear(){
delete this.floorMesh;
this.leftPath = [];
this.rightPath = [];
this.pathArray = [ this.leftPath, this.rightPath ];
this.updateUI();
}
edit() {
if ( ! this.floorMesh ) {
return;
}
this.recordButton.isVisible = this.editing;
this.jsonButton.isVisible = this.editing;
this.jsButton.isVisible = this.editing;
this.editing = !this.editing;
if ( this.resizing ) {
this.scene.onPointerObservable.remove( this.observer );
this.resizing = false;
delete this.observer;
delete this.pathPoints;
delete this.point1;
delete this.point2;
this.editButton.imageUrl = this.contentBase+"/content/icons/edit.png";
if ( this.edgeMesh ) {
this.edgeMesh.dispose();
delete this.edgeMesh;
}
} else if ( this.editing ) {
this.editButton.imageUrl = this.contentBase+"/content/icons/back.png";
this.editButton.text = "Pick 1";
this.resizing = true;
this.observer = this.scene.onPointerObservable.add((pointerInfo) => {
switch (pointerInfo.type) {
case BABYLON.PointerEventTypes.POINTERDOWN:
if(pointerInfo.pickInfo.hit && pointerInfo.pickInfo.pickedMesh == this.floorMesh) {
if ( ! this.point1 ) {
this.point1 = this.pickClosest(pointerInfo.pickInfo);
this.editButton.text = "Pick 2";
} else if ( ! this.point2 ) {
this.point2 = this.pickClosest(pointerInfo.pickInfo);
this.selectEdge();
this.editButton.text = "Drag";
} else {
this.pickedPoint = this.pickClosest(pointerInfo.pickInfo);
this.editButton.imageUrl = "/content/icons/tick.png";
this.editButton.text = null;
}
}
break;
case BABYLON.PointerEventTypes.POINTERUP:
delete this.pickedPoint;
break;
case BABYLON.PointerEventTypes.POINTERMOVE:
if ( this.pickedPoint && pointerInfo.pickInfo.pickedMesh == this.floorMesh ) {
this.resizeRibbon( pointerInfo.pickInfo.pickedPoint );
}
break;
}
});
} else if ( this.observer ) {
this.editButton.text = null;
this.scene.onPointerObservable.remove( this.observer );
}
}
pickClosest( pickInfo ) {
var pickedIndex = 0;
var pickedLeft = false;
var path;
var pathPoint;
var min = 100000;
for ( var i = 0; i < this.leftPath.length; i++ ) {
var leftDistance = pickInfo.pickedPoint.subtract( this.leftPath[i] ).length();
var rightDistance = pickInfo.pickedPoint.subtract( this.rightPath[i] ).length();
if ( leftDistance < min ) {
min = leftDistance;
pickedLeft = true;
pickedIndex = i;
path = this.leftPath;
pathPoint = this.leftPath[i];
}
if ( rightDistance < min ) {
min = rightDistance;
pickedLeft = false;
pickedIndex = i;
path = this.rightPath;
pathPoint = this.rightPath[i];
}
}
var ret = {
index: pickedIndex,
path: path,
left: pickedLeft,
pathPoint: pathPoint,
point: pickInfo.pickedPoint.clone()
};
console.log("Picked left: "+pickedLeft+" index: "+pickedIndex+"/"+path.length+" distance: "+min);
return ret;
}
selectEdge() {
if ( this.point1.index > this.point2.index ) {
var tmp = this.point2;
this.point2 = this.point1;
this.point1 = tmp;
}
var points = []
for ( var i = this.point1.index; i <= this.point2.index; i++ ) {
if ( this.point1.left ) {
points.push( this.leftPath[i] );
} else {
points.push( this.rightPath[i] );
}
}
this.pathPoints = points;
if ( this.pathPoints.length > 1 ) {
this.edgeMesh = BABYLON.MeshBuilder.CreateLines("FloorEdge", {points: points, updatable: true}, this.scene );
} else {
this.edgeMesh = BABYLON.MeshBuilder.CreateSphere("FloorEdge", {diameter:0.1}, this.scene);
this.edgeMesh.position = this.pathPoints[0];
}
}
resizeRibbon(point) {
var diff = point.subtract(this.pickedPoint.point);
for (var i = 0; i < this.pathPoints.length; i++ ) {
this.pathPoints[i].addInPlace(diff);
}
this.pickedPoint.point = point.clone();
// update the ribbon
// seems buggy:
//BABYLON.MeshBuilder.CreateRibbon( "FloorRibbon"+this.floorCount, {pathArray: this.pathArray, instance: this.floorMesh});
var floorMesh = BABYLON.MeshBuilder.CreateRibbon( "FloorRibbon"+this.floorCount, {pathArray: this.pathArray, updatable: true}, this.scene );
floorMesh.material = this.floorMaterial;
floorMesh.checkCollisions = false;
this.floorMesh.dispose();
this.floorMesh = floorMesh;
// update the edge
if ( this.pathPoints.length > 1 ) {
BABYLON.MeshBuilder.CreateLines("FloorEdge", {points: this.pathPoints, instance: this.edgeMesh} );
}
}
saveJson() {
var json = this.printJson();
VRSPACEUI.saveFile('FloorRibbon'+this.floorCount+'.json', json);
this.clear();
}
saveJs() {
var js = this.printJs();
VRSPACEUI.saveFile('FloorRibbon'+this.floorCount+'.js', js);
this.clear();
}
printJson() {
var ret = '{"pathArray":\n';
ret += "[\n";
ret += this.printPathJson(this.leftPath);
ret += "\n],[\n";
ret += this.printPathJson(this.rightPath);
ret += "\n]}";
console.log(ret);
return ret;
}
printJs() {
var ret = "BABYLON.MeshBuilder.CreateRibbon( 'FloorRibbon"+this.floorCount+"', {pathArray: \n";
ret += "[[\n";
ret += this.printPathJs(this.leftPath);
ret += "\n],[\n";
ret += this.printPathJs(this.rightPath);
ret += "\n]]}, scene );";
console.log(ret);
return ret;
}
printPathJs(path) {
var ret = "";
for ( var i = 0; i < path.length-1; i++ ) {
ret += "new BABYLON.Vector3("+path[i].x.toFixed(this.decimals)+","+path[i].y.toFixed(this.decimals)+","+path[i].z.toFixed(this.decimals)+"),";
}
ret += "new BABYLON.Vector3("+path[path.length-1].x.toFixed(this.decimals)+","+path[path.length-1].y.toFixed(this.decimals)+","+path[path.length-1].z.toFixed(this.decimals)+")";
return ret;
}
printPathJson(path) {
var ret = "";
for ( var i = 0; i < path.length-1; i++ ) {
ret += "["+path[i].x.toFixed(this.decimals)+","+path[i].y.toFixed(this.decimals)+","+path[i].z.toFixed(this.decimals)+"],";
}
ret += "["+path[path.length-1].x.toFixed(this.decimals)+","+path[path.length-1].y.toFixed(this.decimals)+","+path[path.length-1].z.toFixed(this.decimals)+"]";
return ret;
}
}