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- {"ast":null,"code":"import { Buffer, VertexBuffer } from \"./buffer.js\";\nconst isLittleEndian = (() => {\n const array = new Uint8Array(4);\n const view = new Uint32Array(array.buffer);\n return !!((view[0] = 1) & array[0]);\n})();\nObject.defineProperty(VertexBuffer.prototype, \"effectiveByteStride\", {\n get: function () {\n return this._alignedBuffer && this._alignedBuffer.byteStride || this.byteStride;\n },\n enumerable: true,\n configurable: true\n});\nObject.defineProperty(VertexBuffer.prototype, \"effectiveByteOffset\", {\n get: function () {\n return this._alignedBuffer ? 0 : this.byteOffset;\n },\n enumerable: true,\n configurable: true\n});\nObject.defineProperty(VertexBuffer.prototype, \"effectiveBuffer\", {\n get: function () {\n return this._alignedBuffer && this._alignedBuffer.getBuffer() || this._buffer.getBuffer();\n },\n enumerable: true,\n configurable: true\n});\nVertexBuffer.prototype._rebuild = function () {\n var _this$_buffer, _this$_alignedBuffer;\n (_this$_buffer = this._buffer) === null || _this$_buffer === void 0 || _this$_buffer._rebuild();\n (_this$_alignedBuffer = this._alignedBuffer) === null || _this$_alignedBuffer === void 0 || _this$_alignedBuffer._rebuild();\n};\nVertexBuffer.prototype.dispose = function () {\n var _this$_alignedBuffer2;\n if (this._ownsBuffer) {\n this._buffer.dispose();\n }\n (_this$_alignedBuffer2 = this._alignedBuffer) === null || _this$_alignedBuffer2 === void 0 || _this$_alignedBuffer2.dispose();\n this._alignedBuffer = undefined;\n this._isDisposed = true;\n};\nVertexBuffer.prototype.getWrapperBuffer = function () {\n return this._alignedBuffer || this._buffer;\n};\nVertexBuffer.prototype._alignBuffer = function () {\n var _this$_alignedBuffer3, _this$_label;\n const data = this._buffer.getData();\n if (!this.engine._features.forceVertexBufferStrideAndOffsetMultiple4Bytes || this.byteStride % 4 === 0 && this.byteOffset % 4 === 0 || !data) {\n return;\n }\n const typeByteLength = VertexBuffer.GetTypeByteLength(this.type);\n const alignedByteStride = this.byteStride + 3 & ~3;\n const alignedSize = alignedByteStride / typeByteLength;\n const totalVertices = this._maxVerticesCount;\n const totalByteLength = totalVertices * alignedByteStride;\n const totalLength = totalByteLength / typeByteLength;\n let sourceData;\n if (Array.isArray(data)) {\n const sourceDataAsFloat = new Float32Array(data);\n sourceData = new DataView(sourceDataAsFloat.buffer, sourceDataAsFloat.byteOffset, sourceDataAsFloat.byteLength);\n } else if (data instanceof ArrayBuffer) {\n sourceData = new DataView(data, 0, data.byteLength);\n } else {\n sourceData = new DataView(data.buffer, data.byteOffset, data.byteLength);\n }\n let alignedData;\n if (this.type === VertexBuffer.BYTE) {\n alignedData = new Int8Array(totalLength);\n } else if (this.type === VertexBuffer.UNSIGNED_BYTE) {\n alignedData = new Uint8Array(totalLength);\n } else if (this.type === VertexBuffer.SHORT) {\n alignedData = new Int16Array(totalLength);\n } else if (this.type === VertexBuffer.UNSIGNED_SHORT) {\n alignedData = new Uint16Array(totalLength);\n } else if (this.type === VertexBuffer.INT) {\n alignedData = new Int32Array(totalLength);\n } else if (this.type === VertexBuffer.UNSIGNED_INT) {\n alignedData = new Uint32Array(totalLength);\n } else {\n alignedData = new Float32Array(totalLength);\n }\n const numComponents = this.getSize();\n let sourceOffset = this.byteOffset;\n for (let i = 0; i < totalVertices; ++i) {\n for (let j = 0; j < numComponents; ++j) {\n switch (this.type) {\n case VertexBuffer.BYTE:\n alignedData[i * alignedSize + j] = sourceData.getInt8(sourceOffset + j);\n break;\n case VertexBuffer.UNSIGNED_BYTE:\n alignedData[i * alignedSize + j] = sourceData.getUint8(sourceOffset + j);\n break;\n case VertexBuffer.SHORT:\n alignedData[i * alignedSize + j] = sourceData.getInt16(sourceOffset + j * 2, isLittleEndian);\n break;\n case VertexBuffer.UNSIGNED_SHORT:\n alignedData[i * 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