three-stdlib
Version:
stand-alone library of threejs examples
489 lines (488 loc) • 18.6 kB
JavaScript
"use strict";
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
const THREE = require("three");
const _object_pattern = /^[og]\s*(.+)?/;
const _material_library_pattern = /^mtllib /;
const _material_use_pattern = /^usemtl /;
const _map_use_pattern = /^usemap /;
const _vA = /* @__PURE__ */ new THREE.Vector3();
const _vB = /* @__PURE__ */ new THREE.Vector3();
const _vC = /* @__PURE__ */ new THREE.Vector3();
const _ab = /* @__PURE__ */ new THREE.Vector3();
const _cb = /* @__PURE__ */ new THREE.Vector3();
function ParserState() {
const state = {
objects: [],
object: {},
vertices: [],
normals: [],
colors: [],
uvs: [],
materials: {},
materialLibraries: [],
startObject: function(name, fromDeclaration) {
if (this.object && this.object.fromDeclaration === false) {
this.object.name = name;
this.object.fromDeclaration = fromDeclaration !== false;
return;
}
const previousMaterial = this.object && typeof this.object.currentMaterial === "function" ? this.object.currentMaterial() : void 0;
if (this.object && typeof this.object._finalize === "function") {
this.object._finalize(true);
}
this.object = {
name: name || "",
fromDeclaration: fromDeclaration !== false,
geometry: {
vertices: [],
normals: [],
colors: [],
uvs: [],
hasUVIndices: false
},
materials: [],
smooth: true,
startMaterial: function(name2, libraries) {
const previous = this._finalize(false);
if (previous && (previous.inherited || previous.groupCount <= 0)) {
this.materials.splice(previous.index, 1);
}
const material = {
index: this.materials.length,
name: name2 || "",
mtllib: Array.isArray(libraries) && libraries.length > 0 ? libraries[libraries.length - 1] : "",
smooth: previous !== void 0 ? previous.smooth : this.smooth,
groupStart: previous !== void 0 ? previous.groupEnd : 0,
groupEnd: -1,
groupCount: -1,
inherited: false,
clone: function(index) {
const cloned = {
index: typeof index === "number" ? index : this.index,
name: this.name,
mtllib: this.mtllib,
smooth: this.smooth,
groupStart: 0,
groupEnd: -1,
groupCount: -1,
inherited: false
};
cloned.clone = this.clone.bind(cloned);
return cloned;
}
};
this.materials.push(material);
return material;
},
currentMaterial: function() {
if (this.materials.length > 0) {
return this.materials[this.materials.length - 1];
}
return void 0;
},
_finalize: function(end) {
const lastMultiMaterial = this.currentMaterial();
if (lastMultiMaterial && lastMultiMaterial.groupEnd === -1) {
lastMultiMaterial.groupEnd = this.geometry.vertices.length / 3;
lastMultiMaterial.groupCount = lastMultiMaterial.groupEnd - lastMultiMaterial.groupStart;
lastMultiMaterial.inherited = false;
}
if (end && this.materials.length > 1) {
for (let mi = this.materials.length - 1; mi >= 0; mi--) {
if (this.materials[mi].groupCount <= 0) {
this.materials.splice(mi, 1);
}
}
}
if (end && this.materials.length === 0) {
this.materials.push({
name: "",
smooth: this.smooth
});
}
return lastMultiMaterial;
}
};
if (previousMaterial && previousMaterial.name && typeof previousMaterial.clone === "function") {
const declared = previousMaterial.clone(0);
declared.inherited = true;
this.object.materials.push(declared);
}
this.objects.push(this.object);
},
finalize: function() {
if (this.object && typeof this.object._finalize === "function") {
this.object._finalize(true);
}
},
parseVertexIndex: function(value, len) {
const index = parseInt(value, 10);
return (index >= 0 ? index - 1 : index + len / 3) * 3;
},
parseNormalIndex: function(value, len) {
const index = parseInt(value, 10);
return (index >= 0 ? index - 1 : index + len / 3) * 3;
},
parseUVIndex: function(value, len) {
const index = parseInt(value, 10);
return (index >= 0 ? index - 1 : index + len / 2) * 2;
},
addVertex: function(a, b, c) {
const src = this.vertices;
const dst = this.object.geometry.vertices;
dst.push(src[a + 0], src[a + 1], src[a + 2]);
dst.push(src[b + 0], src[b + 1], src[b + 2]);
dst.push(src[c + 0], src[c + 1], src[c + 2]);
},
addVertexPoint: function(a) {
const src = this.vertices;
const dst = this.object.geometry.vertices;
dst.push(src[a + 0], src[a + 1], src[a + 2]);
},
addVertexLine: function(a) {
const src = this.vertices;
const dst = this.object.geometry.vertices;
dst.push(src[a + 0], src[a + 1], src[a + 2]);
},
addNormal: function(a, b, c) {
const src = this.normals;
const dst = this.object.geometry.normals;
dst.push(src[a + 0], src[a + 1], src[a + 2]);
dst.push(src[b + 0], src[b + 1], src[b + 2]);
dst.push(src[c + 0], src[c + 1], src[c + 2]);
},
addFaceNormal: function(a, b, c) {
const src = this.vertices;
const dst = this.object.geometry.normals;
_vA.fromArray(src, a);
_vB.fromArray(src, b);
_vC.fromArray(src, c);
_cb.subVectors(_vC, _vB);
_ab.subVectors(_vA, _vB);
_cb.cross(_ab);
_cb.normalize();
dst.push(_cb.x, _cb.y, _cb.z);
dst.push(_cb.x, _cb.y, _cb.z);
dst.push(_cb.x, _cb.y, _cb.z);
},
addColor: function(a, b, c) {
const src = this.colors;
const dst = this.object.geometry.colors;
if (src[a] !== void 0)
dst.push(src[a + 0], src[a + 1], src[a + 2]);
if (src[b] !== void 0)
dst.push(src[b + 0], src[b + 1], src[b + 2]);
if (src[c] !== void 0)
dst.push(src[c + 0], src[c + 1], src[c + 2]);
},
addUV: function(a, b, c) {
const src = this.uvs;
const dst = this.object.geometry.uvs;
dst.push(src[a + 0], src[a + 1]);
dst.push(src[b + 0], src[b + 1]);
dst.push(src[c + 0], src[c + 1]);
},
addDefaultUV: function() {
const dst = this.object.geometry.uvs;
dst.push(0, 0);
dst.push(0, 0);
dst.push(0, 0);
},
addUVLine: function(a) {
const src = this.uvs;
const dst = this.object.geometry.uvs;
dst.push(src[a + 0], src[a + 1]);
},
addFace: function(a, b, c, ua, ub, uc, na, nb, nc) {
const vLen = this.vertices.length;
let ia = this.parseVertexIndex(a, vLen);
let ib = this.parseVertexIndex(b, vLen);
let ic = this.parseVertexIndex(c, vLen);
this.addVertex(ia, ib, ic);
this.addColor(ia, ib, ic);
if (na !== void 0 && na !== "") {
const nLen = this.normals.length;
ia = this.parseNormalIndex(na, nLen);
ib = this.parseNormalIndex(nb, nLen);
ic = this.parseNormalIndex(nc, nLen);
this.addNormal(ia, ib, ic);
} else {
this.addFaceNormal(ia, ib, ic);
}
if (ua !== void 0 && ua !== "") {
const uvLen = this.uvs.length;
ia = this.parseUVIndex(ua, uvLen);
ib = this.parseUVIndex(ub, uvLen);
ic = this.parseUVIndex(uc, uvLen);
this.addUV(ia, ib, ic);
this.object.geometry.hasUVIndices = true;
} else {
this.addDefaultUV();
}
},
addPointGeometry: function(vertices) {
this.object.geometry.type = "Points";
const vLen = this.vertices.length;
for (let vi = 0, l = vertices.length; vi < l; vi++) {
const index = this.parseVertexIndex(vertices[vi], vLen);
this.addVertexPoint(index);
this.addColor(index);
}
},
addLineGeometry: function(vertices, uvs) {
this.object.geometry.type = "Line";
const vLen = this.vertices.length;
const uvLen = this.uvs.length;
for (let vi = 0, l = vertices.length; vi < l; vi++) {
this.addVertexLine(this.parseVertexIndex(vertices[vi], vLen));
}
for (let uvi = 0, l = uvs.length; uvi < l; uvi++) {
this.addUVLine(this.parseUVIndex(uvs[uvi], uvLen));
}
}
};
state.startObject("", false);
return state;
}
class OBJLoader extends THREE.Loader {
constructor(manager) {
super(manager);
this.materials = null;
}
load(url, onLoad, onProgress, onError) {
const scope = this;
const loader = new THREE.FileLoader(this.manager);
loader.setPath(this.path);
loader.setRequestHeader(this.requestHeader);
loader.setWithCredentials(this.withCredentials);
loader.load(
url,
function(text) {
try {
onLoad(scope.parse(text));
} catch (e) {
if (onError) {
onError(e);
} else {
console.error(e);
}
scope.manager.itemError(url);
}
},
onProgress,
onError
);
}
setMaterials(materials) {
this.materials = materials;
return this;
}
parse(text) {
const state = new ParserState();
if (text.indexOf("\r\n") !== -1) {
text = text.replace(/\r\n/g, "\n");
}
if (text.indexOf("\\\n") !== -1) {
text = text.replace(/\\\n/g, "");
}
const lines = text.split("\n");
let line = "", lineFirstChar = "";
let lineLength = 0;
let result = [];
const trimLeft = typeof "".trimLeft === "function";
for (let i = 0, l = lines.length; i < l; i++) {
line = lines[i];
line = trimLeft ? line.trimLeft() : line.trim();
lineLength = line.length;
if (lineLength === 0)
continue;
lineFirstChar = line.charAt(0);
if (lineFirstChar === "#")
continue;
if (lineFirstChar === "v") {
const data = line.split(/\s+/);
switch (data[0]) {
case "v":
state.vertices.push(parseFloat(data[1]), parseFloat(data[2]), parseFloat(data[3]));
if (data.length >= 7) {
state.colors.push(parseFloat(data[4]), parseFloat(data[5]), parseFloat(data[6]));
} else {
state.colors.push(void 0, void 0, void 0);
}
break;
case "vn":
state.normals.push(parseFloat(data[1]), parseFloat(data[2]), parseFloat(data[3]));
break;
case "vt":
state.uvs.push(parseFloat(data[1]), parseFloat(data[2]));
break;
}
} else if (lineFirstChar === "f") {
const lineData = line.substr(1).trim();
const vertexData = lineData.split(/\s+/);
const faceVertices = [];
for (let j = 0, jl = vertexData.length; j < jl; j++) {
const vertex = vertexData[j];
if (vertex.length > 0) {
const vertexParts = vertex.split("/");
faceVertices.push(vertexParts);
}
}
const v1 = faceVertices[0];
for (let j = 1, jl = faceVertices.length - 1; j < jl; j++) {
const v2 = faceVertices[j];
const v3 = faceVertices[j + 1];
state.addFace(v1[0], v2[0], v3[0], v1[1], v2[1], v3[1], v1[2], v2[2], v3[2]);
}
} else if (lineFirstChar === "l") {
const lineParts = line.substring(1).trim().split(" ");
let lineVertices = [];
const lineUVs = [];
if (line.indexOf("/") === -1) {
lineVertices = lineParts;
} else {
for (let li = 0, llen = lineParts.length; li < llen; li++) {
const parts = lineParts[li].split("/");
if (parts[0] !== "")
lineVertices.push(parts[0]);
if (parts[1] !== "")
lineUVs.push(parts[1]);
}
}
state.addLineGeometry(lineVertices, lineUVs);
} else if (lineFirstChar === "p") {
const lineData = line.substr(1).trim();
const pointData = lineData.split(" ");
state.addPointGeometry(pointData);
} else if ((result = _object_pattern.exec(line)) !== null) {
const name = (" " + result[0].substr(1).trim()).substr(1);
state.startObject(name);
} else if (_material_use_pattern.test(line)) {
state.object.startMaterial(line.substring(7).trim(), state.materialLibraries);
} else if (_material_library_pattern.test(line)) {
state.materialLibraries.push(line.substring(7).trim());
} else if (_map_use_pattern.test(line)) {
console.warn(
'THREE.OBJLoader: Rendering identifier "usemap" not supported. Textures must be defined in MTL files.'
);
} else if (lineFirstChar === "s") {
result = line.split(" ");
if (result.length > 1) {
const value = result[1].trim().toLowerCase();
state.object.smooth = value !== "0" && value !== "off";
} else {
state.object.smooth = true;
}
const material = state.object.currentMaterial();
if (material)
material.smooth = state.object.smooth;
} else {
if (line === "\0")
continue;
console.warn('THREE.OBJLoader: Unexpected line: "' + line + '"');
}
}
state.finalize();
const container = new THREE.Group();
container.materialLibraries = [].concat(state.materialLibraries);
const hasPrimitives = !(state.objects.length === 1 && state.objects[0].geometry.vertices.length === 0);
if (hasPrimitives === true) {
for (let i = 0, l = state.objects.length; i < l; i++) {
const object = state.objects[i];
const geometry = object.geometry;
const materials = object.materials;
const isLine = geometry.type === "Line";
const isPoints = geometry.type === "Points";
let hasVertexColors = false;
if (geometry.vertices.length === 0)
continue;
const buffergeometry = new THREE.BufferGeometry();
buffergeometry.setAttribute("position", new THREE.Float32BufferAttribute(geometry.vertices, 3));
if (geometry.normals.length > 0) {
buffergeometry.setAttribute("normal", new THREE.Float32BufferAttribute(geometry.normals, 3));
}
if (geometry.colors.length > 0) {
hasVertexColors = true;
buffergeometry.setAttribute("color", new THREE.Float32BufferAttribute(geometry.colors, 3));
}
if (geometry.hasUVIndices === true) {
buffergeometry.setAttribute("uv", new THREE.Float32BufferAttribute(geometry.uvs, 2));
}
const createdMaterials = [];
for (let mi = 0, miLen = materials.length; mi < miLen; mi++) {
const sourceMaterial = materials[mi];
const materialHash = sourceMaterial.name + "_" + sourceMaterial.smooth + "_" + hasVertexColors;
let material = state.materials[materialHash];
if (this.materials !== null) {
material = this.materials.create(sourceMaterial.name);
if (isLine && material && !(material instanceof THREE.LineBasicMaterial)) {
const materialLine = new THREE.LineBasicMaterial();
THREE.Material.prototype.copy.call(materialLine, material);
materialLine.color.copy(material.color);
material = materialLine;
} else if (isPoints && material && !(material instanceof THREE.PointsMaterial)) {
const materialPoints = new THREE.PointsMaterial({ size: 10, sizeAttenuation: false });
THREE.Material.prototype.copy.call(materialPoints, material);
materialPoints.color.copy(material.color);
materialPoints.map = material.map;
material = materialPoints;
}
}
if (material === void 0) {
if (isLine) {
material = new THREE.LineBasicMaterial();
} else if (isPoints) {
material = new THREE.PointsMaterial({ size: 1, sizeAttenuation: false });
} else {
material = new THREE.MeshPhongMaterial();
}
material.name = sourceMaterial.name;
material.flatShading = sourceMaterial.smooth ? false : true;
material.vertexColors = hasVertexColors;
state.materials[materialHash] = material;
}
createdMaterials.push(material);
}
let mesh;
if (createdMaterials.length > 1) {
for (let mi = 0, miLen = materials.length; mi < miLen; mi++) {
const sourceMaterial = materials[mi];
buffergeometry.addGroup(sourceMaterial.groupStart, sourceMaterial.groupCount, mi);
}
if (isLine) {
mesh = new THREE.LineSegments(buffergeometry, createdMaterials);
} else if (isPoints) {
mesh = new THREE.Points(buffergeometry, createdMaterials);
} else {
mesh = new THREE.Mesh(buffergeometry, createdMaterials);
}
} else {
if (isLine) {
mesh = new THREE.LineSegments(buffergeometry, createdMaterials[0]);
} else if (isPoints) {
mesh = new THREE.Points(buffergeometry, createdMaterials[0]);
} else {
mesh = new THREE.Mesh(buffergeometry, createdMaterials[0]);
}
}
mesh.name = object.name;
container.add(mesh);
}
} else {
if (state.vertices.length > 0) {
const material = new THREE.PointsMaterial({ size: 1, sizeAttenuation: false });
const buffergeometry = new THREE.BufferGeometry();
buffergeometry.setAttribute("position", new THREE.Float32BufferAttribute(state.vertices, 3));
if (state.colors.length > 0 && state.colors[0] !== void 0) {
buffergeometry.setAttribute("color", new THREE.Float32BufferAttribute(state.colors, 3));
material.vertexColors = true;
}
const points = new THREE.Points(buffergeometry, material);
container.add(points);
}
}
return container;
}
}
exports.OBJLoader = OBJLoader;
//# sourceMappingURL=OBJLoader.cjs.map