(?:`)?(?:.{,5000})(?:`)?email:`qhull@qhull\.`org`this`software`includes`qhull`from`the`geometry`center\.`qhull`is`copyrighted`as`noted`above\.`qhull`is`free`software`and`may`be`obtained`via`http`from`www\.`qhull\.`org\.`it`may`be`freely`copied,`modified,`and`redistributed`under`the`following`conditions:(?:`)?(?:.{,20})(?:`)?all`copyright`notices`must`remain`intact`in`all`files\.(?:`)?(?:.{,20})(?:`)?a`copy`of`this`text`file`must`be`distributed`along`with`any`copies`of`qhull`that`you`redistribute;`this`includes`copies`that`you`have`modified,`or`copies`of`programs`or`other`software`products`that`include`qhull\.(?:`)?(?:.{,20})(?:`)?if`you`modify`qhull,`you`must`include`a`notice`giving`the`name`of`the`person`performing`the`modification,`the`date`of`modification,`and`the`reason`for`such`modification\.(?:`)?(?:.{,20})(?:`)?when`distributing`modified`versions`of`qhull,`or`other`software`products`that`include`qhull,`you`must`provide`notice`that`the`original`source`code`may`be`obtained`as`noted`above\.(?:`)?(?:.{,20})(?:`)?`there`is`no`warranty`or`other`guarantee`of`fitness`for`qhull,`it`is`provided`solely`as`is`\.`bug`reports`or`fixes`may`be`sent`to`qhull\-`bug@qhull\.`org;`the`authors`may`or`may`not`act`on`them`as`they`desire\.