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D nuqtadan uchburchak AVS gacha bo‘lgan masofa proekciyalari va uning
xaqiqiy kattaligi topilsin.
Bu masala ham boshqa masalalar kabi AVS uchburchakning nuqtalari
koordinatalarini kiritishdan boshlanadi. Draw – Line buyrug`ini yuklab AVS
uchburchakning absolyut koordinatalarini buyruqlar oynasidan kiriting:
A (65,43,30), V(40,12,60), S(0,15,14) va D nuqta (55,55,50)
(Ushbu koordinatalarni nuqta qo‘yish buyrug`i yordamida amalga oshirish
mumkin. Mazkur usulda nuqtalar kiritilgandan keyin ularni bevosita Line
buyrug`i bilan kursor yordamida bog`lab chiqish mumkin)
Uchburchakning frontal proeksiyasining absolyut koordinatalarini kiriting:
Command: LINE Specify first point: 125,140
Specify next point or [Undo]: 150,170
Specify next point or [Undo]: 190,124
Specify next point or [Close/Undo]: c
Uchburchakning gorizontal proeksiyasining absolyut koordinatalarini
kiriting:
Command: LINE Specify first point: 125,67
Specify next point or [Undo]: 150,98
Specify next point or [Undo]: 190,95
Specify next point or [Close/Undo]: c
Draw – Point buyrug`ini yuklab D nuqtanning absolyut koordinatalarini
kiriting:
Command: _point
Current point modes: PDMODE=32 PDSIZE=1.0000
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Specify a point: 185,160
Command: _point
Current point modes: PDMODE=32 PDSIZE=1.0000
Specify a point:
Specify a point: 185,55 ENTER tugmasini bosing.
endi bog`lovchi chiziqlar yordamida nuqtalarni Draw – Line buyrug`ini
yuklab kursor yordamida bog`lab chiqing. Shu buyruqni yuklab qayta yuklab,
avval a nuqtadan x o‘qiga parallel qilib (ORTO rejimida – G`8) v
1
va s
1
tomonini kesib o‘tuvchi kesma chizing. Yana shu buyruqni yuklab, bog`lash
rejimidan Intersection qismini tanlab, 1
1
nuqtani kursor orqali ko‘rsating chiziq
kesishgan chiziqqa bog`lanadi va tegishli belgi paydo bo‘ladi. Nuqtani shu
joyga
bog`lab
kursorni
pastga
torting.
Gorizontal
proekciyadagi
uchburchakning v va s tomonlarini kesib o‘tguncha chiziqni chizing. Taxrirlash
panelidan TRIM buyrug`ini yuklab, chiziqning ortiqcha qismini qirqib tashlang.
Xuddi shu tartibda 2
1
va 2 nuqtalarni belgilang.
Draw – Line buyrug`ini yuklang, SHIFT tugmasini bosib bog`lash rejimiga
kiring va undan NODE qismini tanlab D nuqtani ko‘rsating. Chiziqni 1
1
va s
1
tekislikning frontal chizig`iga perependikulyar holda yaqinlashtirib SHIFT
tugmasini bosib bog`lash rejimiga kiring va undan
qismini
tanlang. endi chiziq faqat to‘g`ri chiziqlarga perependikulyar holda bog`lanadi.
Tegishli belgi chiqqandan so‘ng chiziqni 1
1
va s
1
tekislikning frontal chizig`iga
bog`lang. Modify - Extend buyrug`ini yuklab sichqoncha o‘ng tugmasini
bosing. Chiziqning ulangan qismini ketma-ket ko‘rsatish orqali chiziqni a, s
tomonigacha olib boring. Mazkur amalni D nuqta bilan gorizontal
proeksiyasida ham amalga oshiring. Bog`lovchi chiziqlarni nuqtalarga bog`lang
va kerakli ishoralarni qo‘ying. M va N nuqtalarni toping va ularni bog`lovchi
chiziqlar yordamida uchburchak tomonlariga tushiring. Nuqta ishoralarini
qo‘ying. Modify – Offcet buyrug`ini yuklab sichqoncha o‘ng tugmasini bosing,
a, 2 gorizontal chiziqning k va d nuqta oralig`ini kursor orqali ko‘rsating.
Bunda bog`lash rejimidan NODE qismini tanlang. Chiziqni paralell
tashlanadigan qismini ya’ni d nuqta tomonini sichqonchani chap tugmasini
bosib ko‘rsating. Bunda
Ikki tekislikning kesishish chizig`ini yasash.
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ABC va DEF uchburchaklar bilan berilgan ikki tekislikning o‘zaro
kesishish chizig`i yasalsin va ularning ko‘rinar ko‘rinmas qismlari aniqlansin.
Mazkur ikki kesishuvchi uchburchaklarning koordinatalari quyidagicha: A
(132,25,20), B (25,10,75), C (0,105,20), D (91,80,10), E (5,25,50),
F(105,15,100). Bu uchburchakning shakllarini bevosita absolyut yoki nisbiy
koordinatalar orqali kiritamiz. Buning uchun Draw – Line buyrug`ini yuklab X
o‘qining Auto CAD ekranidagi absolyut koordinatalarini kiritamiz:
Command: LINE Specify first point: 240,150
Specify next point or [Undo]: 90,150 ENTER ni bosing.
Menyular satridan Draw - Point - Multipli Point buyrug`ini yuklab,
quydagi koordinatalarni ketma – ket kiriting:
ABC uchburchakning gorizontal proekciyalari nuqtalarini absolyut
koordinatalar orqali kiritamiz:
Command: _point
Current point modes: PDMODE=35 PDSIZE=5.0000
Specify a point: 240,170
Command: _point
Current point modes: PDMODE=35 PDSIZE=5.0000
Specify a point: 108,170
Command: _point
Current point modes: PDMODE=35 PDSIZE=5.0000
Specify a point: 215,225
ENTER ni bosib so‘ng ESC ni bosing.
Eslatma
! Mazkur nuqta koordinatalarini bevosita Line buyrug`iga ham
bersa bo‘ladi. Bunda ekranda bevosita uchburchak tasviri paydo bo‘ladi.
Draw – Line buyrug`ini yuklab SHIFT klavishasini bosib turib,
sichqoncha o‘ng tugmasini bosing va hosil bo‘lgan bog`lash rejimlaridan
NODE (nuqtalarga bog`lash) qismini tanlang. Chiziqni nuqtalarga birin ketin
bog`lab chiqing. (Kursorni nuqtaga olib borganda tegishli bog`lash belgisi
paydo bo‘ladi. So‘ng sichqoncha chap tugmasini bosib chiziq nuqtalarga
bog`lanadi)
DEF uchburchakning gorizontal proekciyalari nuqtalarini absolyut
koordinatalar orqali kiritamiz:
Command: _point
Current point modes: PDMODE=35 PDSIZE=5.0000
Specify a point: 149,160
Command: _point
Current point modes: PDMODE=35 PDSIZE=5.0000
Specify a point: 135,250
Command: _point
Current point modes: PDMODE=35 PDSIZE=5.0000
Specify a point: 235,200
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ABC uchburchakning frontal proekciyalari nuqtalarini absolyut
koordinatalar orqali kiritamiz:
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