Primary Solids:
Volumetric forms that are easily recognized from its regular and distinct shapes being rotated or extended. Examples: sphere & cylinder (circle), cone & pyramid (triangle), cube (square).
http://www.enasco.com/product/TB16963T
http://www.uberinspiration.com/nettleton-199-interior-design/
The hanging lamps at the center possess cylindrical form. the table on the left is shaped in cuboid. And the decorated lamp on the left is a sphere. These differentiating geometry in primary solids, applying in the same interior, makes the space simple, basic, yet offers a variety.
Dimensional Transformation:
Despite being altered or transformed from one or more of its own dimensions, the form is still able to keep its identity remained.
The office table consists of one big rectangular plane and four stands, but when we look at the overall appearance, the table has its form inside an implied cuboid.
Subtractive Forms:
Being transformed as a form gets its portion of volume subtractive. The form either retains its identity or gets a new form, but still has its original traces.
http://terrableudesign.blogspot.com/2010/10/fun-with-shapes.html
The absence of blocks to create a full cubicle building makes the architecture's form extraordinary and less intimidating.
Additive Forms:
Being transformed as a form gets new portions of volume, becoming additive from various forms. The form either retains its identity or gets a new form, but still has its original traces.
http://zonfiza.blogspot.com/2010/10/form_07.html
By adding blocks on the already existing building, the whole form becomes interesting and unique by being irregular, destroying the stiffing balance most buildings have.
Centralized Forms:
The form is centered and surrounded by clustered combing elements that makes the centralized form dominant and focal point.
https://angelmanarang.wordpress.com/2011/08/01/organization-of-forms/
We can see that every block of the form is the same repeating, but what stands out is the bigger blocks right at the center that dominates the floor plane and viewer's point.
Linear Forms:
Lining up the forms in one or series of rows. The forms are in a principle.
http://terrableudesign.blogspot.com/2010/10/fun-with-shapes.html
Clustered Forms:
Many forms are grouped together in a specific area.
https://angelmanarang.wordpress.com/2011/08/01/organization-of-forms/
Formal Collision of Geometry:
When two or more different forms in geometry or orientation touch, collide, penetrate, or stack up through each other to create a new identity of form with new visual supremacy and dominance.
Circle & Square:
Combining elements of free flowing, perfectly circular form and rectilinear, functional geometry to create a new unity of forms with contrasting features and orientation.
Rotated Grid:
A balanced and ideal form with its contrasting geometry from orientation and its structural grid.
http://www.designboom.com/architecture/architects-collective-dalian-planning-museum/
Articulation of Form:
When a form is articulated by a change in adjoining planes, distinct developed corners, removal corners, contrast along edges. This articulation reveals the nature of the form and its relationship with its parts.
Edges & Corners:
Contrasting surface qualities and angle deviation among adjoining planes for edges. An opening or distinct element at corners.
http://hiroshimasunrise.blogspot.com/2009/11/umhlanga-mixed-use-photos-3.html
Surfaces:
Size, scale, proportion, visual weight, contrasting elements (color, texture, etc.) give a new perception on surface articulation.
http://www.noragraw.com/2008/12/midreview-with-greg.html