2014. April hónap bejegyzései

40th anniversary of the Rubik’s Cube

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The 40th anniversary of the Rubik’s cube is being celebrated with the Beyond Rubik’s Cube exhibition at Liberty Science Center in Jersey City: “7,000 sq ft of games, puzzles, history, art and engineering, all inspired by Ernő Rubik’s best-selling masterpiece”.
A few days after the opening of the exhibition, here is the Picture of the week of LibreLogo.org:
Rubik’s_cube_colors 40th anniversary of the Rubik’s Cube bővebben… →

Hungarian and Norwegian educational materials

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LibreLogo textbook (made in LibreOffice and LibreLogo)
LibreLogo textbook (made in LibreOffice and LibreLogo)

E-Governmental Free Software Competence Centre of Hungary has published a free LibreLogo textbook (PDF, 6 MB) for primary and secondary schools of Hungary. The book is based on the teaching experiences of the author, Viktória Lakó, and according to its subtitle (“from turtle graphics to the graduation in programming”), it covers a wide area from turtle graphics to the secondary school-level introduction of algorithms and data structures.

Kolbjørn Stuestøl, author of the Norwegian localization of LibreLogo, has introduced on the user support list of LibreOffice a Norwegian LibreLogo tutorial with nice examples and illustrations. The English translation of the tutorial is under development.

Color and transparency gradients

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gradientLibreOffice 4.3 (see daily builds of its development version) will support color and transparency gradients in LibreLogo:

FILLCOLOR [“YELLOW”, “RED”, 2, 0, 0, 25, 75]
FILLTRANSPARENCY [100, 0]
CIRCLE 100

FILLCOLOR defines a radial color gradient, from yellow to red, the center is positioned horizontally 25% and vertically 75% from the left upper corner of the shape. FILLTRANSPARENCY defines a linear transparency gradient, too.
gradient2Next example shows linear color and radial transparency gradients:

FILLCOLOR [“YELLOW”, “RED”]
FILLTRANSPARENCY [100, 0, 2, 0, 0, 25, 75]
CIRCLE 100

gradient3This code draws circles with random color gradients:

PENUP
REPEAT 100 [
    FILLCOLOR [ANY, ANY]
    CIRCLE 20 + RANDOM 130
    POSITION ANY
]