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Copyright 2020 Jorge Gascon Perez <jorge.gascon.perez@gmail.com>
*/
class Scene {
selected_meshes_ids = new Set();
canvas = null;
engine = null;
scene = null;
camera = null;
constructor(canvas_id) {
this.clear();
this.canvas = document.getElementById(canvas_id);
Iif (this.canvas) {
this.engine = new BABYLON.Engine(this.canvas,
true,
{
preserveDrawingBuffer: true,
stencil: true
});
} else { //if (!this.canvas)
//Engine that does not require WebGL, used for testing and server-side purposes.
//More information at: https://doc.babylonjs.com/features/nullengine
this.engine = new BABYLON.NullEngine();
} //if (this.canvas)
//Assertive programming: If something critical fails, the program is killed:
//"Dead programs tell no lies" (from the Book "The pragmatic Programmer").
Iif (!this.engine) {
let error_text = "ERROR Creating Babylon engine";
if (typeof module === 'undefined') {
console.error(error_text);
console.trace();
alert(error_text + "\n(more details in 'Developer Tools --> Console')");
} //if (typeof module === 'undefined') {
throw error_text;
} //if (!this.engine)
this.scene = new BABYLON.Scene(this.engine);
Iif (!this.scene) {
let error_text = "ERROR Creating Babylon scene";
if (typeof module === 'undefined') {
console.error(error_text);
console.trace();
alert(error_text + "\n(more details in 'Developer Tools --> Console')");
} //if (typeof module === 'undefined')
throw error_text;
} //if (!this.scene)
this.scene.clearColor = BABYLON.Color3.Black();
this.camera = new BABYLON.ArcRotateCamera("Camera",
Math.PI / 2, 1.6, 5,
new BABYLON.Vector3(0, 2, 0),
this.scene);
this.camera.allowUpsideDown = false;
this.camera.wheelPrecision = 150;
this.camera.minZ = 0.01;
Iif (this.canvas) {
this.camera.attachControl(this.canvas, true);
} //if (this.canvas)
//TODO: Setting the lights and the Skybox, this code should be in another place.
//~ var hdrTexture = new BABYLON.CubeTexture("images/Studio_Softbox_2Umbrellas_cube_specular.env",
//~ this.scene);
//~ hdrTexture.gammaSpace = false;
//~ this.scene.environmentTexture = hdrTexture;
var light = new BABYLON.HemisphericLight("light1",
new BABYLON.Vector3(2, 2, 5),
this.scene);
light.intensity = 3;
// Environment Texture
var hdrTexture = BABYLON.CubeTexture.CreateFromPrefilteredData("images/environment.dds",
this.scene);
this.scene.imageProcessingConfiguration.exposure = 0.6;
this.scene.imageProcessingConfiguration.contrast = 1.6;
// Skybox
var hdrSkybox = BABYLON.Mesh.CreateBox("hdrSkyBox", 1000.0, this.scene);
var hdrSkyboxMaterial = new BABYLON.PBRMaterial("skyBox", this.scene);
hdrSkyboxMaterial.backFaceCulling = false;
hdrSkyboxMaterial.reflectionTexture = hdrTexture.clone();
hdrSkyboxMaterial.reflectionTexture.coordinatesMode = BABYLON.Texture.SKYBOX_MODE;
hdrSkyboxMaterial.microSurface = 1.0;
hdrSkyboxMaterial.disableLighting = true;
hdrSkybox.material = hdrSkyboxMaterial;
hdrSkybox.infiniteDistance = true;
} //constructor(canvas_id)
clear() {
this.selected_meshes_ids.clear();
this.canvas = null;
this.engine = null;
this.scene = null;
this.camera = null;
} //clear()
connect_render_loop(a_function) {
this.engine.runRenderLoop(a_function);
} //connect_render_loop(a_function)
render() {
this.scene.render();
} //render()
resize() {
this.engine.resize();
} //resize()
load_model(filename) {
let my_this = this;
BABYLON.SceneLoader.ImportMesh("",
"",
filename,
this.scene,
function (meshes) {
for (var i=0; i<meshes.length; i++) {
let mesh = meshes[i];
if (mesh.id == '__root__') {
continue;
} //if (mesh.id == '__root__')
my_this.set_mesh_as_selectable(mesh);
} //for (var i=0; i<meshes.length; i++)
} //function (meshes)
); //BABYLON.SceneLoader.ImportMesh(
} //load_model(filename)
set_mesh_as_selectable(mesh) {
if (!mesh) {
return;
} //if (!mesh)
let mesh_id = mesh.id;
LOG(mesh_id);
mesh.actionManager = new BABYLON.ActionManager(this.scene);
let my_this = this;
mesh.actionManager.registerAction(
new BABYLON.ExecuteCodeAction(
BABYLON.ActionManager.OnPickTrigger, //trigger
function (event) {
let mesh = event.meshUnderPointer;
my_this.selected_meshes_ids.add(mesh.id);
LOG('Selected ['+mesh.id+']');
mesh.showBoundingBox = true;
} //function (event)
) //new BABYLON.ExecuteCodeAction(
).then(
new BABYLON.ExecuteCodeAction(
BABYLON.ActionManager.OnPickTrigger, //trigger
function (event) {
let mesh = event.meshUnderPointer;
my_this.selected_meshes_ids.delete(mesh.id);
LOG('DeSelected ['+mesh.id+']');
mesh.showBoundingBox = false;
} //function (event)
) //new BABYLON.ExecuteCodeAction(
); //mesh.actionManager.registerAction(
} //set_mesh_as_selectable(mesh)
set_texture_to_selected_meshes(texture_url) {
let mesh;
let old_mat;
let new_mat;
let new_mat_id;
for (let mesh_id of this.selected_meshes_ids) {
mesh = this.scene.getMeshByID(mesh_id);
Eif (!mesh) {
continue;
} //if (!mesh)
LOG('Setting to ['+mesh_id+'] texture ['+texture_url+']');
//TODO: use (or generate) a "material_id" more elegant than with texture_url:
new_mat_id = texture_url;
new_mat = this.scene.getMaterialByID(new_mat_id);
if (!new_mat) {
LOG("Creating new material ["+new_mat_id+"]");
if (mesh.material) {
//A fast way to create a material with the most similar properties
//to the existing one.
new_mat = mesh.material.clone(new_mat_id);
} else { //if (!mesh.material)
//Creating a sort-of matte material.
new_mat = new BABYLON.PBRMaterial(new_mat_id, this.scene);
new_mat.albedoColor = BABYLON.Color3.White();
//new_mat.reflectionTexture = this.scene.getMaterialByID("skyBox").reflectionTexture.clone();
new_mat.microSurface = 0.96;
new_mat.albedoColor = BABYLON.Color3.White();
new_mat.reflectivityColor = new BABYLON.Color3(0.0, 0.0, 0.0);
} //if (mesh.material)
//No need to call the next function (the new material is added to the scene automatically).
//this.scene.addMaterial(new_mat);
//Another way to create a new material.
//~ new_mat = new BABYLON.StandardMaterial(new_mat_id, this.scene);
//Looking for if this texture is already loaded in the scene.
let new_texture = null;
this.scene.textures.forEach(
function(texture) {
if (texture.url == texture_url) {
new_texture = texture;
return;
} //if (texture.url == texture_url)
} //function(texture)
); //this.scene.textures.forEach
if (!new_texture) {
LOG("Creating new texture ["+texture_url+"]");
new_texture = new BABYLON.Texture(texture_url, this.scene);
//OJO: Put this line, otherwise the texture will be incorrect.
new_texture.vScale = -1;
//new_texture.invertY = true;
} //if (!new_texture)
new_mat.albedoTexture = new_texture;
} //if (!new_mat)
//BUG?: The newly asigned material/texture do not use the model's UV texture coords, Is it a bug of Babylon?
old_mat = mesh.material;
if (old_mat && old_mat.id != new_mat.id) {
mesh.material = null;
old_mat.unbind();
//Unused materials are deleted
if (old_mat.getBindedMeshes().length == 0) {
LOG("Deleting old material ["+old_mat.id+"]");
old_mat.dispose(true, true, true); //(forceDisposeEffect, forceDisposeTextures, notBoundToMesh)
//FIXME: Are orphan textures actually deleted?
} //if (old_mat.getBindedMeshes.length == 0)
} //if (old_mat && old_mat.id != new_mat.id)
LOG("Materials in scene ["+this.scene.materials.length+"]");
LOG("Textures in scene ["+this.scene.textures.length+"]");
mesh.material = new_mat;
} //for (let mesh_id of this.selected_meshes_ids)
} //set_texture_to_selected_meshes(texture_url)
} //class Scene
Eif (typeof module !== 'undefined') {
module.exports = Scene;
} //if (typeof module !== 'undefined')
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