Technical Drawings give detailed information about Structure, Dimensions, Materials and Assembly
The main ones are Perspectives, Isometric Projections and Planometric Projections
Working Drawings also include Orthographic Projections and Sections
Projections are three-dimensional shapes on a 2D surface
for his mathematical illusions. His drawings have
inspired many other artists
Their advantage is that they show the object's dimensions accurately, making it easier to draw them, to scale from the Plan View
Planometric projections (like isometric drawings) show all dimensions accurately and to scale, and are frequently used to show buildings or room layouts
The main ones are Perspectives, Isometric Projections and Planometric Projections
Working Drawings also include Orthographic Projections and Sections
Projections are three-dimensional shapes on a 2D surface
Hands by MC Escher Image from: Google Search
MC Escher is a very famous graphic artist, knownfor his mathematical illusions. His drawings have
inspired many other artists
Image from: Interactive Drawings
Image from: Interactive Drawings
In an Isometric Projection all vertical lines on an object remain vertical while horizontal lines are drawn at 30°Isometric projection distorts shapes slightly in order to keep all upright lines vertical (and because perspective is ignored)
Their advantage is that they show the object's dimensions accurately, making it easier to draw them, to scale from the Plan View
Planometric projections (like isometric drawings) show all dimensions accurately and to scale, and are frequently used to show buildings or room layouts
Because they are drawn with 45° angles, there is no distortion, so that a circular object can be shown as a true circle
In Perspective Drawings the forward face or edge
of the object is drawn first, with the other lines receding away from the viewer, just as they appear when you look
at a real object
together at the Vanishing Points
vanishing points
for developing ideas in 3D
for internal views
for drawings of tall buildings
in the following drawing
Although these may be done in Isometric or Planometric projection, the normal drawing technique is orthographic projection
Some objects may need a Section Drawing to give extra structural information, or an Assembly Drawing to show how the parts fit together
of the object is drawn first, with the other lines receding away from the viewer, just as they appear when you look
at a real object
Image from: BBC Bitesize
If the receding lines are extended they will meettogether at the Vanishing Points
One Point Perspective Image from: Andrew Diec
Perspective drawings can use one, two or threevanishing points
Two Point Perspective Image from: Andrew Diec
Two-point perspective has many applicationsfor developing ideas in 3D
Vertical Two Point Perspective Image from: Andrew Diec
Three-point perspective is sometimes usedfor internal views
Three Point Perspective Image from: Andrew Diec
More often, Three-point perspective is usedfor drawings of tall buildings
Image from: Harvest School
The advantage of perspective drawing is that it makes objects appear more realistic, as objects appear to get smaller as their distance from the observer increasesImage from: Google Search
Escher used three-point perspectivein the following drawing
Relativity by MC Escher Image from: Google Search
This inspired the following modelImage from: Lego
Drawings which contain all the information needed to make an object, including dimensions and details of components, materials and assembly instructions, are called Working Drawings Although these may be done in Isometric or Planometric projection, the normal drawing technique is orthographic projection
Some objects may need a Section Drawing to give extra structural information, or an Assembly Drawing to show how the parts fit together
Ulster Uni
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