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}\n        this.w = def.w || 0;\n        this.h = ('h' in def ? def.h : -lengths_js_1.BIGDIMEN);\n        this.d = ('d' in def ? def.d : -lengths_js_1.BIGDIMEN);\n        this.L = this.R = this.ic = this.sk = this.dx = 0;\n        this.scale = this.rscale = 1;\n        this.pwidth = '';\n    }\n    BBox.zero = function () {\n        return new BBox({ h: 0, d: 0, w: 0 });\n    };\n    BBox.empty = function () {\n        return new BBox();\n    };\n    BBox.prototype.empty = function () {\n        this.w = 0;\n        this.h = this.d = -lengths_js_1.BIGDIMEN;\n        return this;\n    };\n    BBox.prototype.clean = function () {\n        if (this.w === -lengths_js_1.BIGDIMEN)\n            this.w = 0;\n        if (this.h === -lengths_js_1.BIGDIMEN)\n            this.h = 0;\n        if (this.d === -lengths_js_1.BIGDIMEN)\n            this.d = 0;\n    };\n    BBox.prototype.rescale = function (scale) {\n        this.w *= scale;\n        this.h *= scale;\n        this.d *= scale;\n    };\n    BBox.prototype.combine = function (cbox, x, y) {\n        if (x === void 0) { x = 0; 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