66 lines
1.5 KiB
JavaScript
66 lines
1.5 KiB
JavaScript
/**
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* The geometry of a {@link Region}.
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* - Vertex Attribute: `aVertexPosition` (`vec2`)
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* - Draw Mode: `PIXI.DRAW_MODES.TRIANGLES`
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*/
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export default class RegionGeometry extends PIXI.Geometry {
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/**
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* Create a RegionGeometry.
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* @param {Region} region The Region to create the RegionGeometry from.
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* @internal
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*/
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constructor(region) {
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super();
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this.#region = region;
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this.addAttribute("aVertexPosition", new PIXI.Buffer(new Float32Array(), true, false), 2);
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this.addIndex(new PIXI.Buffer(new Uint16Array(), true, true));
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}
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/* -------------------------------------------- */
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/**
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* The Region this geometry belongs to.
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* @type {Region}
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*/
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get region() {
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return this.#region;
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}
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#region;
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/* -------------------------------------------- */
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/**
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* Do the buffers need to be updated?
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* @type {boolean}
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*/
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#invalidBuffers = true;
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/* -------------------------------------------- */
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/**
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* Update the buffers.
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* @internal
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*/
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_clearBuffers() {
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this.buffers[0].update(new Float32Array());
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this.indexBuffer.update(new Uint16Array());
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this.#invalidBuffers = true;
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}
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/* -------------------------------------------- */
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/**
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* Update the buffers.
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* @internal
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*/
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_updateBuffers() {
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if ( !this.#invalidBuffers ) return;
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const triangulation = this.region.triangulation;
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this.buffers[0].update(triangulation.vertices);
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this.indexBuffer.update(triangulation.indices);
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this.#invalidBuffers = false;
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}
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}
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