@spearwolf/twopoint5d/lib/vertex-objects/VertexObjectDescriptor.js

Create 2.5D realtime graphics and pixelart with WebGL and three.js

import { VertexAttributeDescriptor } from './VertexAttributeDescriptor.js';
export class VertexObjectDescriptor {
    constructor(description) {
        this.description = description;
        this.attributes = new Map();
        this.bufferNames = new Set();
        Object.entries(this.description.attributes).forEach(([attrName, attrDesc]) => {
            const descriptor = new VertexAttributeDescriptor(attrName, attrDesc);
            this.attributes.set(attrName, descriptor);
            this.bufferNames.add(descriptor.bufferName);
        });
        this.basePrototype = description.basePrototype;
        this.methods = description.methods;
    }
    get vertexCount() {
        return this.description.vertexCount ?? 1;
    }
    get meshCount() {
        return this.description.meshCount ?? 1;
    }
    getInstanceCount(capacity) {
        const meshCount = this.description.meshCount ?? 1;
        return meshCount > 1 ? Math.ceil(capacity / meshCount) : capacity;
    }
    get hasIndices() {
        return this.description.indices != null && this.description.indices.length > 0;
    }
    get indices() {
        return this.description.indices ?? [];
    }
    get attributeNames() {
        return Array.from(this.attributes.keys());
    }
    getAttribute(name) {
        return this.attributes.get(name);
    }
}
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