211 lines
6.2 KiB
JavaScript
211 lines
6.2 KiB
JavaScript
var fs = require('fs');
|
|
var mesh = require('./Mesh.js');
|
|
|
|
var geo = {};
|
|
|
|
geo.MeshStreamer = function(path, callback) {
|
|
// Different parts of a obj (a mesh per material)
|
|
this.meshes = [];
|
|
|
|
// In meshes, vertices and texture coords are shared
|
|
this.vertices = [];
|
|
this.faces = [];
|
|
this.normals = [];
|
|
this.texCoords = [];
|
|
|
|
// Chunk size
|
|
this.chunk = 1000;
|
|
|
|
if (path !== undefined) {
|
|
var self = this;
|
|
this.loadFromFile(path, function() {
|
|
|
|
if (typeof callback === 'function')
|
|
callback();
|
|
|
|
});
|
|
}
|
|
}
|
|
|
|
geo.MeshStreamer.prototype.loadFromFile = function(path, callback) {
|
|
var self = this;
|
|
fs.readFile(path, function(err, data) {
|
|
|
|
var currentMesh;
|
|
|
|
// Get lines from file
|
|
var lines = data.toString('utf-8').split("\n");
|
|
|
|
// For each line
|
|
for (var i = 0; i < lines.length; i++) {
|
|
|
|
var line = lines[i];
|
|
|
|
if (line[0] === 'v') {
|
|
|
|
if (line[1] === 't') {
|
|
|
|
// Texture coord
|
|
var texCoord = new mesh.TexCoord(line);
|
|
texCoord.index = self.texCoords.length;
|
|
self.texCoords.push(texCoord);
|
|
|
|
} else if (line[1] === 'n') {
|
|
|
|
var normal = new mesh.Normal(line);
|
|
normal.index = self.normals.length;
|
|
self.normals.push(normal);
|
|
|
|
} else {
|
|
|
|
// Just a simple vertex
|
|
// if (currentMesh === undefined) {
|
|
|
|
// // Chances are that we won't use any material in this case
|
|
// currentMesh = new mesh.Mesh();
|
|
// self.meshes.push(currentMesh);
|
|
|
|
// }
|
|
|
|
var vertex = new mesh.Vertex(line);
|
|
vertex.index = self.vertices.length;
|
|
self.vertices.push(vertex);
|
|
|
|
}
|
|
|
|
} else if (line[0] === 'f') {
|
|
|
|
// Create mesh if it doesn't exist
|
|
if (currentMesh === undefined) {
|
|
currentMesh = new mesh.Mesh();
|
|
self.meshes.push(currentMesh);
|
|
}
|
|
|
|
// Create faces (two if Face4)
|
|
var faces = currentMesh.addFaces(line);
|
|
|
|
faces[0].index = self.faces.length;
|
|
self.faces.push(faces[0]);
|
|
|
|
if (faces.length === 2) {
|
|
|
|
faces[1].index = self.faces.length;
|
|
self.faces.push(faces[1]);
|
|
|
|
}
|
|
|
|
} else if (line[0] === 'u') {
|
|
|
|
// usemtl
|
|
// If a current mesh exists, finish it
|
|
|
|
// Create a new mesh
|
|
currentMesh = new mesh.Mesh();
|
|
self.meshes.push(currentMesh);
|
|
currentMesh.material = (new mesh.Material(line)).name;
|
|
// console.log(currentMesh.material);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (typeof callback === 'function') {
|
|
callback();
|
|
}
|
|
});
|
|
}
|
|
|
|
geo.MeshStreamer.prototype.start = function(socket) {
|
|
|
|
this.meshIndex = -1;
|
|
|
|
var self = this;
|
|
|
|
socket.on('request', function(path) {
|
|
console.log('Asking for ' + path);
|
|
|
|
var regex = /.*\.\..*/;
|
|
|
|
if (regex.test(path)) {
|
|
socket.emit('refused');
|
|
socket.disconnect();
|
|
return;
|
|
}
|
|
|
|
self.loadFromFile(path, function() {
|
|
socket.emit('ok');
|
|
});
|
|
|
|
});
|
|
|
|
socket.on('next', function() {
|
|
|
|
// Send next elements
|
|
var currentMesh = self.meshes[self.meshIndex];
|
|
|
|
if (currentMesh === undefined || currentMesh.isFinished()) {
|
|
currentMesh = self.meshes[++self.meshIndex];
|
|
|
|
if (currentMesh === undefined) {
|
|
socket.emit('finished');
|
|
socket.disconnect();
|
|
return;
|
|
}
|
|
|
|
socket.emit(
|
|
'usemtl',
|
|
currentMesh.material,
|
|
currentMesh.vertices.length,
|
|
currentMesh.faces.length,
|
|
self.texCoords.length > 0,
|
|
self.normals.length > 0
|
|
);
|
|
|
|
} else {
|
|
|
|
var data = [];
|
|
|
|
for (var limit = Math.min(currentMesh.faceIndex + self.chunk, currentMesh.faces.length);
|
|
currentMesh.faceIndex < limit;
|
|
currentMesh.faceIndex++)
|
|
{
|
|
|
|
var currentFace = currentMesh.faces[currentMesh.faceIndex];
|
|
var vertex1 = self.vertices[currentFace.a];
|
|
var vertex2 = self.vertices[currentFace.b];
|
|
var vertex3 = self.vertices[currentFace.c];
|
|
|
|
if (!vertex1.sent) { data.push(vertex1.toList()); vertex1.sent = true;}
|
|
if (!vertex2.sent) { data.push(vertex2.toList()); vertex2.sent = true;}
|
|
if (!vertex3.sent) { data.push(vertex3.toList()); vertex3.sent = true;}
|
|
|
|
var normal1 = self.normals[currentFace.aNormal];
|
|
var normal2 = self.normals[currentFace.bNormal];
|
|
var normal3 = self.normals[currentFace.cNormal];
|
|
|
|
if (normal1 !== undefined && !normal1.sent) { data.push(normal1.toList()); normal1.sent = true;}
|
|
if (normal2 !== undefined && !normal2.sent) { data.push(normal2.toList()); normal2.sent = true;}
|
|
if (normal3 !== undefined && !normal3.sent) { data.push(normal3.toList()); normal3.sent = true;}
|
|
|
|
var tex1 = self.texCoords[currentFace.aTexture];
|
|
var tex2 = self.texCoords[currentFace.bTexture];
|
|
var tex3 = self.texCoords[currentFace.cTexture];
|
|
|
|
if (tex1 !== undefined && !tex1.sent) { data.push(tex1.toList()); tex1.sent = true;}
|
|
if (tex2 !== undefined && !tex2.sent) { data.push(tex2.toList()); tex2.sent = true;}
|
|
if (tex3 !== undefined && !tex3.sent) { data.push(tex3.toList()); tex3.sent = true;}
|
|
|
|
currentFace.index = currentMesh.faceIndex;
|
|
|
|
data.push(currentFace.toList()); currentFace.sent = true;
|
|
}
|
|
|
|
// Emit self.chunk faces (and the corresponding vertices if not emitted)
|
|
socket.emit('elements', data);
|
|
|
|
}
|
|
});
|
|
}
|
|
|
|
module.exports = geo;
|