src/segment.js
/*
 * Block: either a floor or a ceiling.
 */
either a floor or a ceiling.
either a floor or a ceiling .
function Border(x0, x1, y, isCeiling, isBuffer) {
	this.x0 = x0;
	this.x1 = x1;
	this.y = y;
	this.y0 = y;
	this.y1 = y;
	this.isCeiling = isCeiling;
	this.isBuffer = !!isBuffer;
}
function Border ( x0 , x1 , y , isCeiling , isBuffer ) { this . x0 = x0 ; this . x1 = x1 ; this . y = y ; this . y0 = y ; this . y1 = y ; this . isCeiling = isCeiling ; this . isBuffer = ! ! isBuffer ; }
Block: either a floor or a ceiling.
Block : either a floor or a ceiling .