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OpenClipart.org93114Parabola
http://openclipart.org/detail/60223/parabola-by-mazeo
Thu, 13 May 2010 20:44:46 -0400mazeoA parabola on a Cartesian coordinate grid. Typeface is Tuffy (public domain, created by Thatcher Ulrich) from openfontlibrary.org
http://openclipart.org/detail/60223/parabola-by-mazeohttp://creativecommons.org/licenses/publicdomainregular triangle discovery
http://openclipart.org/detail/148285/regular-triangle-discovery-by-10binary
Mon, 04 Jul 2011 21:23:38 -040010binaryI made a discovery about regular triangles today.
For a long time I've wondered, is it possible to create a regular triangle on a computer which
has all of it's points exactly on an integer position. I finally succeeded in doing it with inkscape.
I know almost nothing about the math behind angles. However, when creating lines with the path tool, inkscape displays the angle created by the current location relative to the first point of the line.
For this I used a square grid.
The ratio in pixels I found in the smallest triangle while one corner pointed straight up or down is.
width/height
82/71
How I did this was first use inkscape's polygon tool to automatically create a regular triangle.
Then I made a grid of squares with spacing of 1 pixel. Then I snapped one corner to a grid intersection. Then I tried to follow the triangle and see if it's sides ever crossed an intersection of the grid.
And I was so amazed that it did, and since inkscape lets me automatically snap to the grid, I quickly
made my own triangle path that looks like a really good regular triangle. I'm not sure if I can use this information for pixel art or not but it will be very useful for any vector editor with a square grid.
I'm not sure if this discovery is correct according to geometry,algebra,trigonometry, or whatever other math I know nothing of, but it is at least a good way to approximate a regular triangle on a grid of squares.
http://openclipart.org/detail/148285/regular-triangle-discovery-by-10binaryhttp://creativecommons.org/licenses/publicdomainvector x
http://openclipart.org/detail/152029/vector-x-by-gblas.ivan
Tue, 26 Jul 2011 19:16:26 -0400gblas.ivanalgebra, axis, calculus, clip art, clipart, formula, mathematics, plot, plotting, vector, x, y, http://openclipart.org/detail/152029/vector-x-by-gblas.ivanhttp://creativecommons.org/licenses/publicdomaincolumn graph
http://openclipart.org/detail/152035/vector-y-by-gblas.ivan
Tue, 26 Jul 2011 19:16:30 -0400gblas.ivanalgebra, axis, blue, calculus, clip art, clipart, column, formula, graph, mathematics, plot, plotting, red, vector, x, y, http://openclipart.org/detail/152035/vector-y-by-gblas.ivanhttp://creativecommons.org/licenses/publicdomaingain
http://openclipart.org/detail/154123/gain-by-zinka
Mon, 08 Aug 2011 07:21:21 -0400zinkaadvanced, algebra, calculus, clip art, clipart, mathematics, http://openclipart.org/detail/154123/gain-by-zinkahttp://creativecommons.org/licenses/publicdomaincont ring
http://openclipart.org/detail/154135/cont-ring-by-zinka
Mon, 08 Aug 2011 07:21:22 -0400zinkaalgebra, angle, axis, beta, circular, clip art, clipart, continuous, math, mathematics, maths, measurment, photography, pi, ring, x, y, http://openclipart.org/detail/154135/cont-ring-by-zinkahttp://creativecommons.org/licenses/publicdomaineven ring
http://openclipart.org/detail/154159/even-ring-by-zinka
Mon, 08 Aug 2011 07:21:23 -0400zinkaalgebra, angle, aperture, axis, beta, clip art, clipart, distribution, even, formula, math, mathematics, maths, ring, x, y, http://openclipart.org/detail/154159/even-ring-by-zinkahttp://creativecommons.org/licenses/publicdomainodd ring
http://openclipart.org/detail/154165/odd-ring-by-zinka
Mon, 08 Aug 2011 07:21:23 -0400zinkaalgebra, angle, aperture, axis, beta, clip art, clipart, distribution, formula, math, mathematics, maths, odd, ring, x, y, http://openclipart.org/detail/154165/odd-ring-by-zinkahttp://creativecommons.org/licenses/publicdomaincrct
http://openclipart.org/detail/154171/crct-by-zinka
Mon, 08 Aug 2011 07:21:23 -0400zinkaalgebra, angle, beta, calculus, clip art, clipart, formula, math, mathematics, maths, measurements, http://openclipart.org/detail/154171/crct-by-zinkahttp://creativecommons.org/licenses/publicdomainjnc
http://openclipart.org/detail/154177/jnc-by-zinka
Mon, 08 Aug 2011 07:21:23 -0400zinkaalgebra, beta, calculus, clip art, clipart, formula, math, mathematics, maths, http://openclipart.org/detail/154177/jnc-by-zinkahttp://creativecommons.org/licenses/publicdomainplane wave
http://openclipart.org/detail/154183/plane-wave-by-zinka
Mon, 08 Aug 2011 07:21:23 -0400zinkaalgebra, angle, axis, beta, clip art, clipart, geometry, math, mathematics, maths, measurements, pi, rectangle, rhombus, x, y, http://openclipart.org/detail/154183/plane-wave-by-zinkahttp://creativecommons.org/licenses/publicdomainScientific Solar Calculator 1
http://openclipart.org/detail/176974/scientific-solar-calculator-1-by-merlin2525-176974
Fri, 12 Apr 2013 00:14:48 -0400Merlin2525My remix of a Futuristic Calculator. Thanks go to the following Open Clip Art Artist: Mathafix for calculatrice.svg, Ilnanny for the battery 1329015443.svg, Bnsonger47 for WirelessIcons.svghttp://openclipart.org/detail/176974/scientific-solar-calculator-1-by-merlin2525-176974http://creativecommons.org/licenses/publicdomainScientific Solar Calculator 2
http://openclipart.org/detail/176975/scientific-solar-calculator-2-by-merlin2525-176975
Fri, 12 Apr 2013 00:25:55 -0400Merlin2525My 2nd remix of a Futuristic Calculator. This time I've added more detail. The formulas are for looks (grin), although I would like this device to be real. Thanks go to the following Open Clip Art Artist: Mathafix for calculatrice.svg, Ilnanny for the battery 1329015443.svg, Bnsonger47 for WirelessIcons.svg
http://openclipart.org/detail/176975/scientific-solar-calculator-2-by-merlin2525-176975http://creativecommons.org/licenses/publicdomainGraph of x = 2
http://openclipart.org/detail/179026/graph-of-x-=-2-by-jamesda70-179026
Thu, 06 Jun 2013 15:04:28 -0400jamesda70Graph of the equation x = 2http://openclipart.org/detail/179026/graph-of-x-=-2-by-jamesda70-179026http://creativecommons.org/licenses/publicdomainRagged Rectangle Frame
http://openclipart.org/detail/184841/ragged-rectangle-frame-by-mikafar-184841
Sun, 13 Oct 2013 18:53:34 -0400MikafarThis ragged frame was inspired by a work sheet
from our kindergarden.
After some experiments,
I managed to render this
outline by means of another
free software project: geogebra, which is great
for geometry and algebra.
After some trials, the function
below was plotted and its
graph exported as SVG:
f(x)=(1.1+sin(x/80))^2/(cos(x/8)+1.1)*sin(x/40)
P.S.: Please tell me if you know a way how to export audio wave files to SVG from Audacity or the like...http://openclipart.org/detail/184841/ragged-rectangle-frame-by-mikafar-184841http://creativecommons.org/licenses/publicdomain