| OCR Text |
Show 34 The ost otvous costrat is the ir:':erac': i or:.• E:fective ite:a:tior: fo: 3: design of coplex bJec,:s recuires :e6ate feedback. To achieve smooth rrotio cne rrust in :he interaction loop be held in rraln rremory. This update he ?ictre between 15 and 20 tie5 a second. This clearly reuires that all the inforrration that is ecessary inc:jes both he spatial inforrration needed to generate the picture on the CRT and the related non-spatial information hat serves to condition and constrain the iteraction or which is modified by the interaction. rte ore reserves calculation fo rrine excavations :5 tV8:cal of the kind of analysis one wants to perform on :he ojjec:s whic are teing ITodeled. irlar:es 3 aerodyr:aic aalysis ight te eede. In the stress analysis i9ht be an iportant function of the Allor these kinds of pro?rarrs reccre rapid access :0 th model in order to be practical. Although both graphic interaction and c orrp l e x aalysis ivcle accessing the odel at a high rate, in to:h c!ses te access is localized. Furthermore, they are lccal:zed to the sae areas, narrely to a set of physical objects in sce vlcinity. It is by exloiting this |
