Descriptive Geometry I

Lecture Descriptive Geometry I WS 2021/22, Part 1 of the module: Perception and Representation I for the courses in architecture, civil engineering and teaching degree in construction / wood technology - compulsory module in the 1st or 2nd semester

Descriptive Geometry I – WS 2021/2022

Axonometry by Nele Jung — Sectional axonometry with shadows using the example of the Casa de Vidro by Lina Bo Bardi in Morumbi, São Paulo, Brasilia by Nele Jung, WS 2020/202

Lecture Descriptive Geometry I

Mon. 10:00 a.m. - 11:30 a.m. online live in Zoom+Videos via Olat

Tutorial Descriptive Geometry I

Mon. 12:15 p.m. – 1:45 p.m. room 1-060, 1-160, ZOOM

Mon. 2:00 p.m. – 3:30 p.m. room 1-060, 1-160

Mon. 3:45 p.m. – 5:15 p.m. room 1-060, 1-160

Group division via OLAT course

You will receive the course code by email after you have registered for the course in the KIS at the latest 25^th Oct. 2021, 12:00 p.m.

Beginning of lecture and tutorial: Mon. 08^th Nov. 2021

Information sheet about the semester program as a pdf-Datei

In the winter semester 2021/2022, all students have to work on and hand in three exercises, which are prepared in lectures and tutorials. The tasks of the exercises to be worked on are published in the OLAT course on the date of issue (see information sheet).

In order to pass the module / sub-module, the successful completion of the three exercises (at least grade 4.0 in each exercise) and the passing of the exam are required.

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3D models with animations for the examples in the lecture and tutorials are available on the Sketchfab platform to support spatial imagination:

for the book "Geometric Basics of Architectural Representation": Sketchfab CornelieLeopold

for the task-collection: Sketchfab DarstellendeGeometrie

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Written examination Descriptive Geometry I:

Monday, 07^th Mar. 2022, 8:30 a.m. - 9:30 a.m., sports hall 28-111, cafeteria 3+4 and 1-160 (see Information about the written examination (Klausur))

Registration for the exam via the examination office QIS
in the period: 16.11. - 16.12.2021
Cancellation possible via QIS no later than 28^th Feb. 2021

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Examples from the current winter semester:

Examples of the 1st exercise on the topic: From 2D figures to 3D objects and their 2D representation

A spatial composition was developed from the 2D outline figure. The high variety of possible solutions show the problems of spatial thinking with the help of two-dimensional drawings. The designed 3D composition was presented in a cardboard model, in drawings of assigned othogonal views, an axonometry and a digital 3D model by Rhinoceros. In this way the students should get aware of the spatial interpretation of the 2D drawings.

Examples of the 2nd exercise on the topic: Intersection and unfolding of solids

The initial idea of the second task to be submitted in Descriptive Geometry 1 during WS 2021/22 was a composition from the union of three building parts: Pyramid house, gable roof house and prism. The intersection points and lines of the building parts were to be determined, the true shape of each surface was to be constructed, and the unfolding (mesh) of the composition was to be created, from which a paper model would eventually be built. To develop the idea and support the spatial imagination, students could voluntarily create a 3D model using Rhinoceros®.

Examples of the 3rd exercise on the topic: axonometries with light and shadow

The Cooley House by Marion Mahony Griffin and Walter Burley Griffin was built in 1926 in Monroe, Louisiana, USA. The task was to draw an overall or sectional axonometry from floor plans, elevations and sections of the house. Shadow rendering based on a realistic direction of sunlight complements the spatial effect of the drawing. Four variants: Overall axonometry, Horizontal Sectional axonometry, Vertical Sectional axonometry - Longitudinal and Transverse Section was assigned to students according to their matriculation number.

Examples from the last winter semester:

Examples of the 1st exercise on the topic: From 2D figures to 3D objects and their 2D representation

A spatial composition was developed from the 2D outline figure. The high variety of possible solutions show the problems of spatial thinking with the help of two-dimensional drawings. The designed 3D composition was presented in a cardboard model, in drawings of assigned othogonal views, an axonometry and a digital 3D model by SketchUp. In this way the students should get aware of the spatial interpretation of the 2D drawings.

Examples of the 2nd exercise on the topic: Intersection and unfolding of solids

The task was to develop a spatial composition of three planar bounded solids: two pyramids and a prism, creating lines of intersection between the solids. The shape of one pyramid was given. The other pyramid could have a triangular or square base, the prism a triangular base with vertical or horizontal edges. The intersections of the three solids were to be constructed in 2D drawings, the true shape of the various surfaces was to be determined with the intersection lines, and the unfolding was to be drawn as a mesh, as contiguous as possible, with adhesive edges.

Examples of the 3rd exercise on the topic: axonometries with light and shadow

The residential house of Lina Bo Bardi in São Paulo "Casa de Vidro", built in 1950-52, was given in floor plans, elevations and sections and had to be presented in different axonometric variations with light and shadow using a realistic position of the sun. A construction and presentation drawing was required in each case.

Variant A: Overall axonometry - overall layout of the residential building, location on the hillside

Variant B: Horizontal sectional axonometry - upper floor including furnishings, reference to outdoor space

Variant C: Vertical sectional axonometry - access to the building, location on the hillside

Variant D: Vertical sectional axonometry - atrium, location on the hillside, reference exterior/interior