Cabinet and Engineering Projection

[Crissov]

Could you perhaps add Cabinet Projection (i.e. Cavalier Projection with scaling of depth by 50%) and Engineering (42°/7°) Projection to Projections/graphical_projection_comparison?

I'm using the diagrams from Wikimedia Commons in w3c/csswg-drafts#944.

[mjhorvath]

Hi Crissov. Could you direct me toward some literature about Engineering Projection? I'm not familiar with it. Thanks.

[Crissov]

For dimetric axonometric drawings in engineering, ISO 5456-3, section 5.2, specifies a projection with skewing from the horizon by 42° and 7° and scaling of the former (i.e. depth) axis by ½. The standard does not say so, but these angles are apparently rounded from arcsin(⅛) and arccos(¾), respectively, which are sometimes (e. g. in the German DIN adoption of the standard) given more precisely as 7°10′ and 41°25′, respectively.

Wikipedia: Axonometry with 90° + 42 ° = 132° and 90° + 7° = 97°, i. e. angles measured from the vertical / height / z axis instead of the horizon.

[mjhorvath]

Okay, it will take me a while. Usually I start with camera orientations and work my way from there. In this case I will be doing the reverse.