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Reframing descriptive geometry in the digital era

Abstract

The relationship between descriptive geometry and architecture is undergoing a significant transformation, driven by both the increasing complexity of contemporary architectural demands and the evolution of digital tools. Each technological era – from traditional descriptive geometry through 2D CAD, 3D modelling, computational design, to emerging AI approaches – has fundamentally altered the way geometry is accessed, conceptualised, and manipulated. These transformations have led to the development of new cognitive frameworks for spatial thinking. This article examines this transformation through two complementary analyses. First, it investigates how different technological eras have redefined the medium through which architects engage with geometry, focusing on how these shifts in medium have transformed cognitive mechanisms from projection-based reasoning to algorithm-based thinking and, more recently, to natural language interaction. Second, the article identifies descriptive geometry's evolving roles in contemporary architectural practice, research, and education, revealing both invariant principles that persist regardless of technological mediums and new geometric competencies required by contemporary architectural challenges. The analysis demonstrates that descriptive geometry represents not a fixed operational methodology but an evolving framework for spatial reasoning that transcends specific technological implementations. This contributes to the ongoing dialogue about geometric literacy in the computational age.

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Reframing descriptive geometry in the digital era

Author: Barrera Vera, José Antonio; Narváez Rodríguez, Roberto
Year: 2025
DOI: 10.36253/tribelon-3355
Source: https://idus.us.es/bitstreams/09877944-e924-47df-b4dd-c3cdc162d6f3/download
RIVISTA DI DISEGNO
UNIVERSITÀ DEGLI
STUDI DI FIRENZE
VOL. 2 | N. 3 | 2025
MODELLI, FORME E GEOMETRIE
MODELS, SHAPES AND GEOMETRIES
72
REFRAMING DESCRIPTIVE GEOMETRY
IN THE DIGITAL ERA
The ela ionship be ween desc ip i e geome y and a chi ec u e is unde going a sig-
ni ican ans o ma ion, d i en by bo h he inc easing complexi y o con empo a y a -
chi ec u al demands and he e olu ion o digi al ools. Each echnological e a – om
adi ional desc ip i e geome y h ough 2D CAD, 3D modelling, compu a ional design,
o eme ging AI app oaches – has undamen ally al e ed he way geome y is accessed,
concep ualised, and manipula ed. These ans o ma ions ha e led o he de elopmen o
new cogni i e amewo ks o spa ial hinking. This a icle examines his ans o ma ion
h ough wo complemen a y analyses. Fi s , i in es iga es how di e en echnological
e as ha e ede ined he medium h ough which a chi ec s engage wi h geome y, o-
cusing on how hese shi s in medium ha e ans o med cogni i e mechanisms om
p ojec ion-based easoning o algo i hm-based hinking and, mo e ecen ly, o na u-
al language in e ac ion. Second, he a icle iden i ies desc ip i e geome y's e ol ing
oles in con empo a y a chi ec u al p ac ice, esea ch, and educa ion, e ealing bo h
in a ian p inciples ha pe sis ega dless o echnological mediums and new geome ic
compe encies equi ed by con empo a y a chi ec u al challenges. The analysis demon-
s a es ha desc ip i e geome y ep esen s no a ixed ope a ional me hodology bu
an e ol ing amewo k o spa ial easoning ha anscends speci ic echnological im-
plemen a ions. This con ibu es o he ongoing dialogue abou geome ic li e acy in he
compu a ional age.
Keywo ds: Desc ip i e Geome y, A chi ec u e, G aphic Exp ession, Geome ic Thinking,
Digi al Tools.
Ci a ion: J.A. Ba e a, R. Na áez Rod íguez, Re a-
ming Desc ip i e Geome y in he Digi al E a, in
TRIBELON, II, 2025, 3, pp. 72-79.
ISSN (s ampa): 3035-143X
ISSN (online): 3035-1421
doi: h ps://doi.o g/10.36253/ ibelon-3355
Recei ed: Ma ch, 2025
Accep ed: Ap il, 2025
Published: June, 2025
Copy igh : 2025 Ba e a J.A., Na áez Rod íguez
R., his is an open access pee - e iewed a icle
published by Fi enze Uni e si y P ess (h p://www.
i is e. up ess.ne /index.php/ ibelon) and dis ib-
u ed unde he e ms o he C ea i e Commons
A ibu ion License, which pe mi s un es ic ed
use, dis ibu ion, and ep oduc ion in any medi-
um, p o ided he o iginal au ho and sou ce a e
c edi ed.
Da a A ailabili y S a emen : All ele an da a a e
wi hin he pape and i s Suppo ing In o ma ion
iles.
Compe ing In e es s: The Au ho (s) decla e(s) no
con lic o in e es .
Jou nal Websi e: i is e. up ess.ne / ibelon
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Co esponding au ho : [email p o ec ed]
JOSè ANTONIO bARRERA, RObERTO NARVáEz RODRíGuEz
Desc ip i e Geome y a he
C oss oads o A chi ec u al E olu ion
A chi ec u e p ac i ione s had been em-
ploying p ojec ion echniques o sol e
spa ial p oblems long be o e Monge’s
sys ema iza ion1. The his o ical e olu-
ion o hese me hods e lec s a chi ec-
u e’s con inuous nego ia ion wi h a ail-
able media, whe e desc ip i e geome y
me hods e ol ed in esponse o chang-
ing concep ualiza ions o space ac oss
a chi ec u al his o y2. Desc ip i e geom-
e y hus ep esen s a con inuous ajec-
o y o geome ic hinking ha ex ends
beyond Monge’s o maliza ion3. Monge
himsel acknowledged his his o ical
con inui y while a icula ing he disci-
pline’s dual objec i e: o es ablish me h-
ods o ep esen ing h ee-dimensional
bodies on wo-dimensional su aces and
o deduce spa ial u hs om hese exac
cons uc ions4 . This o mula ion e eals
wo pe asi e ea u es o any geome ic
ool ha signi ican ly in luence a chi ec-
u al p ac ice: he ep esen a ional medi-
um (pape in desc ip i e geome y) and
he me hods de eloped speci ically o
o e come he inhe en limi a ions o ha
medium. This in e dependence be ween
medium and me hod cons i u es a un-
damen al dynamic in he e olu ion o a -
chi ec u al ep esen a ion and hinking.
This ela ionship no only highligh s he
adap abili y o geome ic ools bu also
emphasizes hei ole in shaping he he-
o e ical and p ac ical amewo ks o a -
chi ec u al design. Con empo a y a chi-
ec u e aces challenges o unp eceden -
ed complexi y – including sus ainabili y
impe a i es, u ban me abolism op imi-
za ion, pe o mance-based design e-
qui emen s, and digi al ab ica ion – ha
ede ine he geome ic p oblems a chi-
ec s mus add ess5. The echnological
pa adigm has shi ed om ep esen a-
ional sys ems a emp ing o o e come
wo-dimensional limi a ions o compu-
1 Ta on, L’œu e scien i ique de Monge.
2 E ans, The p ojec i e cas : a chi ec u e and i s
h ee geome ies; Pé ez-gómez, Ques ions o
ep esen a ion: he poe ic o igin o a chi ec u e,
pp. 217-225.
3 Miglia i, Desc ip i e Geome y: F om i s Pas o
i s Fu u e, pp. 555-571.
4 Monge, Géomé ie Desc ip i e - Lecons données
aux Écoles no males, l’An 3 de la République.
5 C . Ca l, U ban Densi y and Block Me abolism, p.
852; Hensel, Da a-d i en design o A chi ec u e
and En i onmen In eg a ion Con e gence o
da a-in eg a ed wo k lows o unde s anding
and designing en i onmen s.
73
Re aming Desc ip i e Geome y in he Digi al E a J. A. Ba e a, R. Na áez Rod íguez
a ional en i onmen s whe e geome y
is di ec ly manipula ed, analysed, and
op imised in a i ual h ee-dimensional
space6. This ans o ma ion aises c i i-
cal ques ions abou he con empo a y
ele ance o desc ip i e geome y, as i s
ounda ional p emise has been echno-
logically ede ined7 ( ig. 1). This a icle
examines desc ip i e geome y’s ans-
o ma ion ac oss echnological e as,
analysing how di e en media ede ine
bo h geome ic ools and a chi ec u al
hinking. The e olu ion om 2D d a -
ing h ough 3D modelling o algo i hmic
design and eme ging AI applica ions
has p og essi ely abs ac ed geome y
om di ec manipula ion, c ea ing new
concep ual amewo ks o spa ial hink-
ing8. Th ough examina ion o scien i ic
li e a u e and con empo a y p ac ice, we
iden i y bo h pe sis en p inciples ha
anscend echnological shi s and he
new geome ic compe encies equi ed
by cu en a chi ec u al demands.
The E olu ion o he Medium:
How Technology Reshapes Geome ic
Tools and Thinking
The medium h ough which a chi ec s
engage wi h geome y plays a unda-
men al ole in shaping bo h concep ual
amewo ks and design me hodologies.
Each echnological ansi ion – om
manual d a ing o compu a ional de-
sign and, mo e ecen ly, AI-assis ed
p ocesses – econ igu es he cogni i e,
ope a ional, and epis emological dimen-
sions o geome ic p ac ice. This sec ion
examines hese echnological ansi ions
no me ely as ins umen al de elop-
men s bu as pa adigma ic shi s ha
eshape how a chi ec s concep ualize,
ope a e, and e en manage geome ic
in o ma ion. The analysis o eg ounds
he ecip ocal ela ionship be ween ep-
esen a ional media and a chi ec u al
hinking, demons a ing how each ech-
nological medium simul aneously ena-
bles new geome ic possibili ies while
imposing speci ic cons ain s and con-
cep ual amewo ks ha shape a chi ec-
u al cogni ion and p ac ice9.
P e-Digi al E a: P ojec ion as Concep ual
F amewo k
The p e-digi al e a o a chi ec u al ge-
ome y was cha ac e ised by a unda-
men al cogni i e amewo k p edica ed
on p ojec ion, bo h as a echnical p oce-
du e and as a concep ual appa a us. This
p ojec ion-based concep ual amewo k
necessi a ed sophis ica ed men al ope -
a ions o spa ial isualiza ion, equi ing
a chi ec s o engage in mul iple cogni-
i e p ocesses o a con inuous cycle o
men al codi ica ion and decodi ica ion
be ween wo-dimensional ep esen a-
ions and h ee-dimensional spa ial con-
cep s o each geome ic ope a ion10.
This ansla ion p ocess’s cogni i e load
shaped a chi ec u al p ac ice h ough
analy ical decomposi ion and sequen-
ial easoning11, es ablishing an epis e-
mological dis ance be ween cogni i e
p ocesses and a chi ec u al objec s12.
A chi ec s necessa ily ope a ed in a e-
lec i e con e sa ion h ough media ed
ep esen a ional sys ems, c ea ing ge-
ome ic easoning modes bound o p o-
jec ion-based echniques’ cons ain s
and a o dances13.
2D CAD E a: The i s digi al ansi ion
The ansi ion o 2D CAD sys ems ep-
esen ed a nuanced echnological e o-
lu ion in a chi ec u al ep esen a ion.
While undamen ally p ese ing he
cogni i e p ocess o ansla ing be ween
wo-dimensional and h ee-dimensional
concep ions, hese sys ems in oduced
c i ical ad ancemen s. Ea ly CAD imple-
men a ions p ima ily unc ioned as dig-
i al analog o adi ional d a ing p ac-
6 Johnson, Ske chpad III. Th ee-Dimensional
G aphical Communica ion wi h a Digi al
Compu e .
7 Ca po, The Digi al Tu n in A chi ec u e 1992-
2012.
8 Ca po, The Second Digi al Tu n: Design beyond
In elligence; Menges & Ahlquis , Compu a ional
Design Thinking: Compu a ion Design Thinking.
9 C . Oxman, Theo y and design in he i s digi al
age, pp. 229-265.
10 Akin e al., P oblem s uc u ing in a chi ec u al
design.
11 Akin, Psychology o A chi ec u al Design.
12 Oxman, The hinking eye: isual e-cogni ion in
design eme gence, pp. 135-164
13 E ans, The p ojec i e cas : a chi ec u e and i s
h ee geome ies, ci .
1 | A chi ec u al needs, medium challenges, and
me hods. Con as s be ween con en ional a chi-
ec u e (Desc ip i e Geome y) e sus con empo a y
a chi ec u e (Digi al Tools).
Desc ip i e
geome y’s
ans o ma ion ac oss
echnological e as,
analysing how di e en
media ede ine bo h
geome ic ools and
a chi ec u al hinking.
“
Desc ip i e
Geome y
Digi al
Tools
con en ional
a chi ec u e
- S anda dized Fo ms
- Euclidean Geome y
- S a ic Rep esen a ion
-G aphic in o ma ion
- ...
Rep esen ing
3D objec s on
2D su ace
- O hog aphic P ojec ion
- Geome ic Cons uc ions
- Manual Codi ica ion
-...
con empo a y
a chi ec u e
a chi ec u al needs medium challenge me hods
- Complex Geome ies
- Complex Rela ions
- Dynamic Rep esen a ion
- Simula ion and Op imiz.
- Da a In eg a ion
- .....
Managing complex
in o ma ion lows
- 3D isualiza ion
- Digi al Modelling
- Algo i hmic De ini ion
- AI and ML sys ems
- Da a In eg a ion
- ...
COMPLEX VIRT. 3D ENVIRONMENT COMPUTATION
PAPER
SIMPLE DESCRIPTIVE GEOMETRY
74
03/25 TRIBELON Modelli, o me e geome ie
ices, eplica ing es ablished ep esen a-
ional con en ions14, and main aining he
exis ing epis emological dis ance while
al e ing hei ma e ial subs a e.
C i ically, 2D CAD sys ems signi ican ly
enhanced geome ic p ac ice h ough
inc eased p ecision, p oduc i i y and
manipulabili y, allowing new cons uc-
ions beyond s aigh edge and compass
limi a ions15. These capabili ies sub ly e-
con igu ed ep esen a ion and concep-
ion, expanding geome ic possibili ies
while p ese ing undamen al p ojec-
ion-based cogni i e amewo ks16.
3D Modeling E a: Libe a ion om
p ojec ion as a concep ual de ice
The eme gence o 3D modelling sys ems
ma ked a undamen al epis emological
shi in a chi ec u al geome y, adically
ans o ming he ela ionship be ween
concep ion and ep esen a ion. Unlike
p e ious pa adigms ha equi ed con-
s uc ing h ee-dimensional unde s and-
ing om wo-dimensional p ojec ions,
3D modelling es ablished a digi al en i-
onmen o di ec spa ial manipula ion o
geome y, elimina ing he adi ional cod-
i ica ion-decodi ica ion cycle, in oducing
a new cogni i e amewo k and educing
he epis emological dis ance be ween
concep ion and ep esen a ion17.
This app oach acili a ed no el explo-
a ions o geome ic complexi y18, and
p o ided a con inuous spa ial easoning
app oach ha undamen ally al e ed a -
chi ec u al hinking19. Building In o ma-
ion Modeling (BIM) u he expanded
his ans o ma ion, con e ing geome -
ic models om me e ep esen a ions o
comp ehensi e in o ma ion sys ems ha
connec concep ualiza ion, analysis, and
ab ica ion h ough in eg a ed digi al
s uc u es20.
Compu a ional Design E a:
F om objec s o p ocesses
The Compu a ional Design E a ma ks a
undamen al shi om he di ec ma-
nipula ion o geome ic objec s in 3D i -
ual en i onmen s (compu e iza ion) o
he au oma ion o design asks h ough
algo i hmic p ocesses (compu a ion)21.
A chi ec s now a icula e ule-based sys-
ems ha gene a e geome y a he han
di ec ly manipula ing o m.
This ansi ion es ablishes algo i hms as
a new cogni i e medium, in oducing
a ep esen a ional language oo ed in
p og amming22. This shi demands an
unp eceden ed le el o abs ac ion and
a ionaliza ion in a chi ec u al hinking.
Designe s mus engage wi h geome y
h ough mul iple laye s: om di ec ma-
nipula ion o pa ame ic ela ionships
o algo i hmic p ocesses23. The p ac ice
ans o ms om isually-media ed o one
inc easingly go e ned by ma hema ical
and algo i hmic o mula ions24 ( ig. 2).
This ans o ma ion es ablishes a cog-
ni i e amewo k o p ocedu al hink-
ing and ma hema ical o malism. Pa -
adoxically, while educing he dis ance
be ween concep ion and geome ic
ou come – bo h i ual and physical – i
inc eases he epis emological dis ance
h ough g ea e le els o abs ac ion in
accessing geome ic po en iali ies25.
Eme ging AI E a: F om explici o implici
geome ic de ini ion
The in eg a ion o a i icial in elligence
in o a chi ec u al design ma ks ano he
undamen al epis emological ans o -
ma ion in geome ic ope a ion. This pa -
adigm shi econ igu es he cogni i e
medium h ough which geome y is ac-
cessed, ansi ioning om explici algo-
i hmic de ini ion o implici gene a ion
h ough machine lea ning sys ems.
AI in oduces a na u al language in e -
ace o geome ic manipula ion26, al-
lowing communica ion wi h geome y
h ough desc ip i e e ms a he han
o mal ma hema ical a icula ions in an
abs ac p og amming language.
14 Bha nani e al., CAD usage in an a chi ec u al
o ice: F om obse a ions o ac i e assis ance,
pp. 243-255.
15 Ba e a-Ve a, Elicon.
16 Eas man, A chi ec u al CAD: a en yea
assessmen o he s a e o he a , pp. 289-292.
17 Kola e ic, A chi ec u e in he Digi al Age: Design
and Manu ac u ing.
18 Aish & Noakes, A chi ec u e wi hou numbe s–
CAAD based on a 3D modelling sys em, pp. 321-
328.
19 Woodbu y, S a egies o In e ac i e Design
Sys ems.
20 Eas man, Building P oduc Models: Compu e
En i onmen s, Suppo ing Design and
Cons uc ion.
21 C . Te zidis, Algo i hmic A chi ec u e.
22 Aish, DesignSc ip : Scalable Tools o Design
Compu a ion, pp. 87-95; Aish, Fi s Build You
Tools, pp. 39-49.
23 Woodbu y, Elemen s o Pa ame ic Design.
24 Menges & Ahlquis , Compu a ional Design
Thinking: Compu a ion Design Thinking, ci .
25 Oxman, Thinking di e ence: Theo ies and
models o pa ame ic design hinking.
2 | Cogni i e laye s ac oss echnological e as: how
a chi ec s access and manipula e geome ic objec s.
Mo e laye s ep esen a g ea e epis emological di-
s ance be ween he a chi ec 's mind and geome y,
wi h he 3D modelling e a p o iding he mos di ec
access.
P ojec ion
decoding
(Men al spa ial
econs uc ion)
P ojec ion
decoding
(Men al spa ial
econs uc ion)
Di ec
geome ic
manipula ion
Abs ac
geome ic
manipula ion
Abs ac
geome ic
manipula ion
P ojec ion
encoding
P ojec ion
encoding
Concep uali-
za ion
o Geome ic
Logic
P ocedu al
Abs ac ion Algo i hmic
Fo mula ion
Syn ac ic
Implemen a ion
Na u al
Language
Desc ip ion
I e a i e
Re inemen
P e-digi al
2D-CAD
3D-CAD
Compu a ion
AI
E as Cogni i e laye s
Ou pu
In e p e a ion
75
Re aming Desc ip i e Geome y in he Digi al E a J. A. Ba e a, R. Na áez Rod íguez
This ans o ma ion al e s he epis emo-
logical s uc u e o geome ic p ac ice
by posi ioning machine cogni ion as an
in e p e i e in e media y be ween de-
signe in en ion and geome ic mani-
es a ion, es ablishing a collabo a ion
be ween human in en and machine in-
e p e a ion27.
AI sys ems again educe he epis emo-
logical dis ance h ough in ui i e in e -
aces28, Geome ic knowledge mus now
be e o mula ed h ough linguis ic s a -
egies a he han di ec geome ic spec-
i ica ion. This econ igu a ion ans o ms
a chi ec u al geome ic cogni ion in o a
dis ibu ed cogni i e sys em whe e ex-
pe ise is nego ia ed be ween human
and machine in elligence h ough i e -
a i e p ocesses o p omp o mula ion,
gene a ion, and e alua ion29
ing uniqueaspec s o desc ip i e geom-
e y’s e ol ing ele ance.
By analysing
desc ip i e geome y’s ela ionship o
con empo a y a chi ec u al challenges
h ough his ipa i e s uc u e, we can
iden i y bo h he endu ing concep u-
al ounda ions ha anscend pa icula
echnological implemen a ions and he
eme gen geome ic compe encies ne-
cessi a ed by con empo a y a chi ec u al
demands.
In A chi ec u al P ac ice: F om di ec
applica ion o concep ual ounda ion
The di ec applica ion o adi ional de-
sc ip i e geome y me hods has o -
en become obsole e in p o essional
wo k lows, p ima ily due o inhe en
limi a ions in i s media ing appa a us.
Examining Monge’s o iginal objec-
i es – ep esen a ion and analysis o
h ee-dimensional o ms – e eals sig-
ni ican sho comings when applied o
con empo a y a chi ec u al demands.
The ep esen a ional unc ion o de-
sc ip i e geome y has been e ec i ely
supe seded by h ee-dimensional digi al
en i onmen s ha elimina e he need
o codi ica ion-decodi ica ion p ocesses
be ween dimensions. Fo ins ance, Build-
ing In o ma ion Modeling amewo ks
es ablish geome ic consis ency ac oss
ep esen a ions while simul aneously in-
eg a ing non-geome ic da a a ibu es
ha adi ional p ojec i e me hods can-
no accommoda e30.
26 Li e al., Gene a i e AI o A chi ec u al Design: A
Li e a u e Re iew, pp. 1-32.
27 Webe e al., Designing success ul Human-AI
Collabo a ion o C ea i e-P oblem Sol ing in
A chi ec u al Design.
28 Choi e al., Gene a i e a chi ec u al plan
d awings o ea ly design decisions: da a
g ounding and addi ional aining o speci ic
use cases.
29 Shuyao e al., Towa ds Human-AI Collabo a i e
A chi ec u al Concep Design ia Seman ic AI,
pp. 68-82.
3 | Gene al design and isualiza ion app oach and
gene a i e app oach acco ding o Dai Shuyao.
(a) Gene al Design & Visualiza ion App oach
Design Concep
Design
Requi eme s
D awing Modeling Rende ing
Design Tools
INPUT OUTPUT
PROCESSING
Plan D awing
S akeholde s' Ea ly
Design Re iew
Gene a i e A chi ec u al
Plan D awings
Use Choice
Use
(in cha ge o Design) (b) P oposed App oach
P omp Addi ional T ained
Gene a i e Model
Image
The New Roles o Desc ip i e Geome y
in Con empo a y A chi ec u e
The p e ious pe sis en nego ia ion
be ween echnological dis up ion and
disciplina y con inui y es ablishes a
heo e ical amewo k o examining
desc ip i e geome y’s con empo a y
oles. This analysis necessi a es di e -
en ia ion be ween h ee in e connec ed
domains; p ac ice, esea ch, and educa-
ion, as each engages wi h geome ic
p inciples h ough dis inc epis emolog-
ical amewo ks, ope a ional con ex s,
and de elopmen al ajec o ies, e eal-
76
03/25 TRIBELON Modelli, o me e geome ie
Simila ly, he analy ical unc ion, de-
ducing spa ial u hs h ough geome -
ic cons uc ion, has been ans o med
h ough compu a ional analysis ools
ha p o ide quan i a i e assessmen
ac oss mul iple pe o mance c i e ia si-
mul aneously31. Despi e his echnolog-
ical supe session, undamen al geome -
ic easoning pe sis s as an essen ial
concep ual ounda ion wi hin compu a-
ional wo k lows. T adi ional geome ic
ope a ions ha e been ans o med a h-
e han abandoned; in e sec ions, de-
elopmen s, and p ojec ion ope a ions
emain undamen al componen s wi hin
compu a ional p ocesses, albei econ-
cep ualised h ough digi al p ocesses32.
This ans o ma ion ep esen s an ope -
a ional con inui y h ough echnological
dis up ion, whe e es ablished geome ic
li e acy emains essen ial while i s im-
plemen ing mechanisms a e adically
econ igu ed33 e ol ing owa ds a com-
pu a ional geome ic easoning whe e
adi ional p inciples in o m algo i hmic
p ocesses wi hin digi al en i onmen s34.
Howe e , p ojec ion-based ep esen a-
ions main ain limi ed ye signi ican
oles in con empo a y p ac ice, p ima -
ily in wo con ex s: (1) documen a ion
o exis ing condi ions whe e his o ical
plans cons i u e p ima y in o ma ion
sou ces, pa icula ly in he i age- ela ed
p ojec s35; and (2) egula o y compli-
ance p ocesses equi ing s anda dised
o hog aphic documen a ion. These
con ex s necessi a e bidi ec ional ex-
change be ween digi al sys ems and
p ojec ion-based ep esen a ions, c e-
a ing hyb id geome ic wo k lows whe e
p ac i ione s mus sys ema ically ans-
la e be ween compu a ional models and
con en ional p ojec ion me hods o na -
iga e p ac ical, legal, and his o ical con-
s ain s36.
30 Schia i e al., BIM da a low a chi ec u e wi h
AR/VR echnologies: Use cases in a chi ec u e,
enginee ing and cons uc ion.
31 Oxman, Digi al a chi ec u e as a challenge o
design pedagogy: heo y, knowledge, models
and medium, pp. 99-120.
32 Po mann e al., A chi ec u al geome y, pp.
145-164.
33 Kola e ic, A chi ec u e in he Digi al Age: Design
and Manu ac u ing, ci .
34 Pe e s, Compu a ion wo ks: The building o
algo i hmic hough .
35 Ma inez-Moya, Me odología de ecupe ación
g á ica de las po adas del Palacio Condal de
Oli a.
36 Ke nighan, Ex ac ing geome ic in o ma ion
om a chi ec u al d awings.
37 Gonzalez Quin ial, Ma in Pas o , Monge
Su aces. Gene a ion, Disc e isa ion and
Applica ion in A chi ec u e.
4 | Pho og aphs o The Ca e pilla Galle y. Bo om:
images o he algo i hmic design p ocess in G as-
shoppe o Rhinoce os 3D and he ep esen a ion,
in one single mul i iew o hog aphy p ojec ion, o
wo classic Desc ip i e Geome y heo ems applied
in he p ojec .

77
Re aming Desc ip i e Geome y in he Digi al E a J. A. Ba e a, R. Na áez Rod íguez
In A chi ec u al Resea ch:
New on ie s o geome ic explo a ion
Wi hin a chi ec u al esea ch con ex s,
desc ip i e geome y has unde gone sig-
ni ican concep ual expansion beyond i s
adi ional ope a ional applica ions. Con-
empo a y schola ship e eals a leas
h ee dis inc ajec o ies whe e desc ip i e
geome y p inciples emain ins umen al
despi e echnological ans o ma ion.
His o ical a chi ec u al esea ch ep e-
sen s he i s ajec o y, whe e esea ch-
e s in es iga ing p ima y his o ical
documen s – s e eo omy and mason y
ea ises, a chi ec u al manusc ip s, con-
s uc ion manuals, o builde s’ d awings
– mus necessa ily de elop expe ise
in pe iod-speci ic desc ip i e geome-
y me hodologies o ex ac meaning-
ul insigh s. The in e p e a ion o hese
his o ical documen s equi es ope a-
ional luency wi h p ojec ion-based
ep esen a ional sys ems ha go e ned
a chi ec u al concep ion and ma e iali-
sa ion du ing hei espec i e pe iods.
Compu a ional ein e p e a ion o clas-
sical desc ip i e geome y p inciples
cons i u es a second signi ican ajec-
o y in con empo a y esea ch. Th ough
algo i hmic e o mula ion o adi ional
heo ems and p inciples, he ollowing
examples demons a e he endu ing el-
e ance o hese p inciples wi hin com-
pu a ional design amewo ks37. The Ca -
e pilla Galle y ( ig.4), which implemen s
Monge’s heo em on quad ic su aces o
38 Na aez-Rod iguez, Ma in-Pas o , F om De-
sc ip i e Geome y o A chi ec u al Geome y:
Con ibu ions by Classic Au ho s o he New
Pa adigm.
39 C . Na áez-Rod íguez e al., Ligh weigh
Conical Componen s o Ro a ional Pa abolic
Domes: Geome ic De ini ion, S uc u al Be-
ha iou , Op imisa ion and Digi al Fab ica ion,
pp. 378-397; Ma ín-Pas o , Na aez-Rod i-
guez. New P ope ies Abou he In e sec ion o
Ro a ional Quad a ic Su aces and Thei Appli-
ca ions in A chi ec u e; Na áez-Rod íguez e
al., Ligh weigh Conical Componen s o Ro a-
ional Pa abolic Domes: Geome ic De ini ion,
S uc u al Beha iou , Op imisa ion and Digi al
Fab ica ion ci ., pp. 378-397.
40 Sch eibe , Gene alized Desc ip i e Geome y.
gene a e complex spa ial con igu a ions
h ough de elopable conical su aces38;
and The A chimedean Pa ilion ( ig. 5),
which employs a p ojec i e in e p e a-
ion o A chimedes’ heo em o enable
he disc e iza ion o pa abolic domes39.
These cases demons a e how he ole
o geome ic easoning in compu a ional
wo k lows and geome ically-in o med
algo i hms signi ican ly op imize compu-
a ional p ocesses by le e aging wo-di-
mensional p ojec i e p ope ies o de-
ine h ee-dimensional complex o ms,
he eby educing algo i hmic complexi y
while simul aneously enhancing s uc-
u al pe o mance, ma e ial e iciency,
and ab ica ion easibili y wi hin con-
empo a y a chi ec u al p oduc ion.The
hi d ajec o y, al hough ep esen ing
ela i ely isola ed occu ences wi h-
in he b oade li e a u e, demons a es
he ema kable adap abili y o desc ip-
i e geome y p inciples ac oss di e se
esea ch domains beyond con en ional
a chi ec u al applica ions. This in e dis-
ciplina y expansion includes inno a i e
“ e e se desc ip i e geome y” me hod-
ology, which econs uc s 3D mason y
s uc u es om 2D images; applica ion
o high-dimensional desc ip i e geom-
e y o neu al ne wo k pa e n ecogni-
ion sys ems; and heo e ical amewo k
o “Gene alised Desc ip i e Geome y”
(GDG) o cons uc i ely imaging ab-
s ac ma hema ical objec s h ough al-
go i hmic ansla ions40.
5 | Pho og aphs o The A chimedean Pa ilion.
78
03/25 TRIBELON Modelli, o me e geome ie
In A chi ec u al Educa ion:
New Compe ences o New Demands
Con empo a y a chi ec u al educa ion
mus nego ia e he complex in e ace be-
ween endu ing geome ic p inciples and
apidly e ol ing echnological pa adigms.
Analysis o he undamen al epis emo-
logical ans o ma ions documen ed in
p e ious sec ions could e eal h ee es-
sen ial compe ency clus e s o geome -
ic educa ion in he compu a ional e a:
- Fi s , s uden s equi e p o iciency in
C ea ing Geome ic Models, Simula ions
and Algo i hmic De ini ions in Digi al En-
i onmen s, encompassing he cons uc-
ion o basic geome ic elemen s, anal-
ysis o in e ac ions be ween hem, gen-
e a ion o composi e objec s, applica ion
o ans o ma ions, modeling o complex
su aces wi h embedded ab ica ion pa-
ame e s, and ex ac ion o geome ic
in o ma ion om complex assemblies.
This compe ency clus e adap s adi-
ional desc ip i e geome y ope a ions
o compu a ional amewo ks while
main aining concep ual con inui y.
- Second, and mos c i ically o u u e
p ac ice as he compe encies in he
i s clus e become inc easingly au o-
ma ed by a i icial in elligence sys ems,
s uden s mus de elop capabili ies o
Managing Flows o In o ma ion Be ween
Physical and Digi al En i onmen s. This
eme gen compe ency domain in ol es
unde s anding and ansla ing geome ic
in o ma ion ac oss di e se ep esen a-
ional sys ems, e alua ing ab ica ion
p ocesses, and e ec i ely communi-
ca ing geome ic in o ma ion h ough
mul iple pla o ms, including human
and a i icial in elligence in e ac ions.
This clus e ep esen s a undamen al
e olu ion beyond adi ional desc ip i e
geome y, add essing he inc easingly
pe meable bounda y be ween digi al
concep ion and physical ma e ializa ion.
- Thi d, s uden s con inue o equi e
compe ency in In e p e ing and Gene -
a ing O hog aphic P ojec ions wi h P e-
cision, hough now con ex ualised wi hin
compu a ional wo k lows. This main ains
connec ion wi h his o ical ep esen a-
ional con en ions while acknowledging
hei econ igu ed ole wi hin con em-
po a y p ac ice.
p ojec ion-based sys ems o compu a-
ional amewo ks. Con empo a y p ac-
ice demons a es ha while adi ional
applica ions ha e diminished, he un-
de lying concep ual ounda ions in o m
eme ging compu a ional me hodologies
ac oss p ac ice, esea ch, and educa ion.
This econcep ualiza ion necessi a es e-
de ining desc ip i e geome y no as a
ixed ope a ional me hodology, bu as an
e ol ing amewo k o spa ial easoning
ha anscends pa icula echnolog-
ical implemen a ions. Fu u e esea ch
should u he examine how geome ic
compe encies ans e ac oss echno-
logical ansi ions, pa icula ly as AI sys-
ems in oduce new cogni i e in e aces
o geome ic ope a ion. Ul ima ely, de-
sc ip i e geome y’s endu ing ele ance
lies no in i s his o ical echniques bu in
i s concep ual appa a us o na iga ing
he inc easingly complex ela ionship
be ween a chi ec u al concep ion and
ma e ializa ion.
6 | P ojec i e in e p e a ion o A chimedes’ p oposi-
ion o disc e ising he pa aboloid’s su ace wi h pla-
na ellip ical aces s emming om a ci cle-packing
algo i hm. On he igh : A chimedes’ p oposi ion in
A chimedes-Mau olico: De conoidibus e sphae oidi-
bus igu is In en o um. Libe secundus, P oposi ion
XII, Pale mo 1685.
Conclusion: Towa ds a New
Unde s anding o Desc ip i e
Geome y
This analysis e eals ha desc ip i e
geome y’s ans o ma ion ac oss ech-
nological e as ep esen s nei he ob-
solescence no unchanged con inui y,
bu a he a undamen al econcep ual-
iza ion o i s p inciples wi hin e ol ing
a chi ec u al pa adigms. The pe sis en
cogni i e ope a ions o desc ip i e ge-
ome y – spa ial isualiza ion, geome -
ic easoning, and analy ical decompo-
si ion – emain essen ial, e en as hei
implemen ing mechanisms e ol e om
79
Re aming Desc ip i e Geome y in he Digi al E a J. A. Ba e a, R. Na áez Rod íguez
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