Beginners May 2017

beginners@lists.squeakfoundation.org

5 participants
5 discussions

Whatever happened to Refactor and Omnibrowsers?
by DarinM1967 05 Jul '17

05 Jul '17

I have been trying to follow Squeak by Example and noticed that both the Refactor and Omnibrowsers are missing from 5.1 and was just curious about what happened to them and why they were removed. I found instruction how to install the Omnibrowser, but it fails. Any help and/or insight into their removal would be great! Take care now, Darin Murphy -- View this message in context: http://forum.world.st/Whatever-happened-to-Refactor-and-Omnibrowsers-tp4945… Sent from the Squeak - Beginners mailing list archive at Nabble.com.

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(no subject)
by Ralph Boland 27 May '17

27 May '17

>> I just attempted to draw a rectangle with dimensions 3@3 corner: 9@3. >> Nothing gets drawn. The reason that nothing is drawn is that the width of >> the rectangle is 0. This makes sense for real numbers but for a pixelated >> screen or other display medium the dimensions of the rectangle >> should be 1 x 7 not 0 x 6!?. This is 7 pixels needed to draw, not 0. >> >> The same issues occur for the height of the rectangles. >> >> I would think that the way things work would cause all kinds of problems >> but since Rectangles are pretty basic, either I am wrong, >> or every bit of Squeak code using rectangles has adjusted accordingly. >> >> Please clarify. >> > The coordinates refer to the imaginary lines between pixels. Thus, if you > draw a rectangle from x=4 to x=5 its width is 1. This is so that if you > draw multiple rectangles, they do not overlap (imagine drawing from 5 to 12 > and from 12 to 19). But I would expect these rectangles to overlap just like I would expect the intervals (3 to: 5) and (5 to: 7) to overlap; and they do (the intervals). But of course we are doing computer graphics here, not mathematics. In the next couple of days I will write code to draw a line segment and see what happens. My guess is that if I draw a line from 3 @ 3 to 3 @ 5 only two pixels will be changed (analogous to how Rectangle works) and not three (my intuition prior to this conversation). > How do Java and other languages handle this? > Same. There's a nice illustration on this page: http://math.hws.edu/~bridgeman/courses/124/f13/doc/paint/paint.html Regardless of my protestations on the right way to do this I must obviously conform to convention. Thanks for the clarification. Ralph Boland

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Rectangles
by Ralph Boland 26 May '17

26 May '17

I just attempted to draw a rectangle with dimensions 3@3 corner: 9@3. Nothing gets drawn. The reason that nothing is drawn is that the width of the rectangle is 0. This makes sense for real numbers but for a pixelated screen or other display medium the dimensions of the rectangle should be 1 x 7 not 0 x 6!?. This is 7 pixels needed to draw, not 0. The same issues occur for the height of the rectangles. I would think that the way things work would cause all kinds of problems but since Rectangles are pretty basic, either I am wrong, or every bit of Squeak code using rectangles has adjusted accordingly. Please clarify. How do Java and other languages handle this? Ralph Boland

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What are squeakplugin.icns for and how to do I use them?
by DarinM1967 09 May '17

09 May '17

Image: Squeak5.1-16549-32bit-All-in-One.app/Contents/Resources/SBE.imageSqueak5.1 latest update: #16549 Image format 6521 (32 bit) Virtual Machine: --------------- Squeak5.1-16549-32bit-All-in-One.app/Contents/Linux-ARM/lib/squeak/5.0-201608171728/squeak Croquet Closure Cog[Spur] VM [CoInterpreterPrimitives VMMaker.oscog-cb.1919] Unix built on Aug 17 2016 19:24:15 Compiler: 4.9.2 Hardware: Raspberry Pi 3 B+ OS: Linux raspberrypi 4.9.24-v7+ #993 SMP Wed Apr 26 18:01:23 BST 2017 armv7l GNU/Linux Internet: Comcast (150+ mps). After setting up the Squeak5.1-16549-32bit-All-in-One, I went through the folders and stumbled upon squeakplugin.icns which was located under: /home/pi/Squeak/Squeak5.1-16549-32bit-All-in-One.app/Contents/Resources/CroquetPlugin.bundle/Contents/Resources, and was wondering what it was there for? There are also plugins too like the Camera and Mpeg3, but there is no instructions on how to install any of them if it's possible to even do so. If anyone could look into this and let me know what they are for and how to install them if possible, that would be awesome! Take care now, Darin Murphy -- View this message in context: http://forum.world.st/What-are-squeakplugin-icns-for-and-how-to-do-I-use-th… Sent from the Squeak - Beginners mailing list archive at Nabble.com.

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Need help with SqueakMap Catalog.
by DarinM1967 05 May '17

05 May '17

Image: Squeak5.1-16549-32bit-All-in-One.app/Contents/Resources/SBE.imageSqueak5.1 latest update: #16549 Image format 6521 (32 bit) Virtual Machine: --------------- Squeak5.1-16549-32bit-All-in-One.app/Contents/Linux-ARM/lib/squeak/5.0-201608171728/squeak Croquet Closure Cog[Spur] VM [CoInterpreterPrimitives VMMaker.oscog-cb.1919] Unix built on Aug 17 2016 19:24:15 Compiler: 4.9.2 Hardware: Raspberry Pi 3 B+ OS: Linux raspberrypi 4.9.24-v7+ #993 SMP Wed Apr 26 18:01:23 BST 2017 armv7l GNU/Linux Internet: Comcast (150+ mps). When I open SqueakMap Catalog the only categories are these: <http://forum.world.st/file/n4945631/SqueakScreen.png> I am able to use the built in webclient using: WebClient httpGet: 'http://www.squeak.org/'. So I can get to the internet, but this version of Squeak doesn't even have a web browser. Which does work, but I am unable to download any of the available Squeak apps like Balloon3d, Seaside, etc.,. Any help/suggestions would be awesome! Take care now, Darin Murphy -- View this message in context: http://forum.world.st/Need-help-with-SqueakMap-Catalog-tp4945631.html Sent from the Squeak - Beginners mailing list archive at Nabble.com.

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Beginners May 2017