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Which clippings match 'Basic Geometric Shapes' keyword pg.1 of 1
18 AUGUST 2015

Pioneering instructional animators Bruce and Katharine Cornwell

"Bruce and Katharine Cornwell are primarily known for a series of remarkable animated films on the subject of geometry. Created on the Tektronics 4051 Graphics Terminal, they are brilliant short films, tracing geometric shapes to intriguing music, including the memorable 'Bach meets Third Steam Jazz' musical score in 'Congruent Triangles.' Their work, distributed by the defunct International Film Bureau, is now out of distribution."

(Geoff Alexander, 2015, Academic Film Archive)

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TAGS

19762D animationabstract graphic animation • Academic Film Archive • basic geometric shapes • Bruce Cornwell • computer animationdigital pioneersearly computer-eraEuclidean geometrygeometric shapesgeometryinstructional materials • International Film Bureau (IFB) • Katharine Cornwell • mathematics educationmotion graphicspioneering animatorpolygon • Tektronix 4051 Graphics Terminal • triangle • visual representations of mathematical concepts

CONTRIBUTOR

Simon Perkins
03 DECEMBER 2012

Sinclair ZX81: semigraphical / pseudographical characters

"If you press GRAPHICS (shifted 9) then the cursor will come up as : this means graphics mode. If you type in a symbol it will appear in its inverse video form, & this will go on until you press GRAPHICS again or NEWLINE. RUBOUT will have its usual meaning. Be careful not to lose the cursor  amongst all the inverse video characters you've just typed in. ...

Right at the beginning are space & ten patterns of black, white & grey blobs; further on there are eleven more. These are called the graphics symbols & are used for drawing pictures. You can enter these from the keyboard, using graphics mode (except for space, which is an ordinary symbol using the  cursor; the black square is inverse space). You use the 20 keys that have graphics symbols written on them. For instance, suppose you want the symbol , which is on the T key. Press GRAPHICS to get the  cursor, & then press shifted T. From the previous description of the graphics mode, you would expect to get an inverse video symbol; but shifted T is normally <>, a token, & tokens have no inverses: so you get the graphics symbol  instead."

(Steven Vickers, 1981, Sinclair Research Limited)

Fig.1 "graphics mode" table from Steven Vickers (1981). "Sinclair ZX81 BASIC Programming", Second Edition 1981, Copyright 1980 Sinclair Research Limited (converted to HTML by Robin Stuart).

2). Matthew Eagles (2008). "ZX81 VDU" TrueType font which replicates the letters, numbers etc. displayed on the screen of the ZX81.

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TAGS

1980s19818-bitbasic geometric shapesblack and white • block graphics • computer historygeometric figuresgeometric shapes • graphic symbols • graphical building block • graphics mode • history of computinghome computerindustrial archaeologymanualmonotone • PETSCII • pictorial systemspixel matrix • pseudographics • semigraphical characters • semigraphics • Sinclair Research Ltd • Sinclair ZX80 • Sinclair ZX81 • sixels • symbolsymbolstypefacevintage technologyvisualisationZX81

CONTRIBUTOR

Simon Perkins
03 DECEMBER 2012

Kazimir Malevich: non-representational, non-painterly abstractions

"In the early twentieth century, Suprematism represented a leap into a totally non–representational, non–painterly, tarantella–like dynamic. Basic geometric shapes, isolated or in groups, were being energized, propelled into an optimistic ideal soaring from lower left to upper right, the vector alone suggesting time. The limits of perception and understanding are being questioned. An aura of simultaneous ecstatic concentration and idolatry of the will pervades these works.

Experienced 'in flesh,' these formidable abstractions look 'humanized': slight wavings in texture and color, the crackled paint of the Black Square on white, the subtlest of whites upon off–whites, transport the viewer into a higher, supremely charged, inspirational state of mind."

(Ileana Marcoulesco, Art Lies)

Fig.1 Kazimir Malevich (1915) "Black Circle", "Black Cross" and "Black Square"

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CONTRIBUTOR

Simon Perkins
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