@tolokoban/tgd/lib/dist/parser/mesh/wavefront.d.ts

ToloGameDev library for WebGL2

import { TgdGeometry } from "../../geometry";
export interface TgdParserMeshWavefrontAttributes {
    vertex: number;
    normal?: number;
    uv?: number;
}
/**
 * This [Wavefront](https://en.wikipedia.org/wiki/Wavefront_.obj_file)
 * parser only finds the object name,
 * the vertices coords, the normals and the UVs.
 *
 * - There can be only one object per file.
 * - Normals and UVs are optional.
 * - All faces **must** be triangles.
 *
 * To export an obj file from blender, please use the following options:
 *
 * - Forward axis: **Y**
 * - Up axis: **Z**
 * - Object / Apply Modifiers: **True**
 * - Geometry / UV Coordinates: **True**
 * - Geometry / Normals: **True**
 * - Geometry / Triangulated Mesh: **True**
 */
export declare class TgdParserMeshWavefront {
    private name;
    private attPosition;
    private attNormal;
    private attUV;
    /**
     * Three consecutive elements define a triangle.
     * An element is a index on the attributes array.
     */
    private elements;
    private elementIndex;
    /**
     * The key is `${pointIndex}/${normalIndex}/${uvIndex}`.
     * The value is the index of the vertex (used in `elements`).
     */
    private readonly mapVertices;
    /**
     * A point ins not a vertex, but just a position in space
     * that can be used by several different vertices.
     * That's the case for faces sharing a vertex but having different
     * normals. A vertex is made of a position, a normal and an uv.
     */
    private points;
    /**
     * A item of this array can be shared by different vertices.
     */
    private normals;
    /**
     * List of vertices per face.
     * The vertices are represented by the index of the attribute.
     */
    private verticesPerTriangle;
    /**
     * Here "normal" is an index on `this.normals` array.
     */
    private normalPerTriangle;
    /**
     * The vertices are indexed per attribute.
     * The triangles are represented by indexes from `this.normalPerTriangle`.
     */
    private trianglesPerVertex;
    /**
     * A item of this array can be shared by different vertices.
     */
    private uvs;
    constructor(content: string);
    makeGeometry({ computeNormals }?: {
        computeNormals?: boolean;
    }): TgdGeometry;
    private computeNormals;
    private reset;
    private readonly onObject;
    private readonly onVertex;
    private readonly onNormal;
    private readonly onTexture;
    private readonly onFace;
    /**
     * Return the index of the vertex for the triplet
     * point/normal/uv.
     */
    private readonly getElem;
    private key;
    private readVertexInto;
}
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