starting:scratch2gp2
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starting:scratch2gp2 [2017/09/30 09:03] 127.0.0.1 external edit |
starting:scratch2gp2 [2017/09/30 17:27] (current) simplesi |
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| It is available for Windows,Mac and Linux from https://gpblocks.org/ | It is available for Windows,Mac and Linux from https://gpblocks.org/ | ||
| - | There is also a version running on a web server so it can be tried out with any browser also (lacks a few features so better to download and run if possible) | + | There is also a [[https://gpblocks.org/run/gp.html|version]] running on a web server so it can be tried out without having to install anything |
| ===== 1st Impressions ===== | ===== 1st Impressions ===== | ||
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| |Scratch automatically shows a variable on stage so nothing to do | Right click on shared (count) -select monitor- drag to stage | | |Scratch automatically shows a variable on stage so nothing to do | Right click on shared (count) -select monitor- drag to stage | | ||
| | Build this script | Build this script. The difference is go is equivalent of green flag and use black arrow on wait to change time to 1 second | | | Build this script | Build this script. The difference is go is equivalent of green flag and use black arrow on wait to change time to 1 second | | ||
| - | | {{:wiki:countto10.gif|}} | {{:wiki:countoe-e1499352386506.png|}} | | + | | {{:starting:countto10.gif|}} | {{:starting:countoe-e1499352386506.png|}} | |
| | Press Green flag | Press go button | | | Press Green flag | Press go button | | ||
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| There is no {{:starting:scratch2gp:say2secs.gif|}} in GP so we always have to add in own own wait block | There is no {{:starting:scratch2gp:say2secs.gif|}} in GP so we always have to add in own own wait block | ||
| - | ==== Actual GP Version ==== | + | |
| | Now although we can write nearly\\ the exactly same code in GP compared to Scratch,\\ GP has far more programming tools so this\\ is the actual way of doing this in GP | {{:starting:scratch2gp:gpcountto1e.png?nolink|}} | | | Now although we can write nearly\\ the exactly same code in GP compared to Scratch,\\ GP has far more programming tools so this\\ is the actual way of doing this in GP | {{:starting:scratch2gp:gpcountto1e.png?nolink|}} | | ||
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| Note: You can right-click on the {{:blocks:i.png|}} and give it nice name if you want | Note: You can right-click on the {{:blocks:i.png|}} and give it nice name if you want | ||
| - | ==== Moving a sprite/class around ==== | + | ===== Moving a sprite/class around ===== |
| TWO MAJOR DIFFERENCES BETWEEN //Scratch// AND **GP** | TWO MAJOR DIFFERENCES BETWEEN //Scratch// AND **GP** | ||
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| So //in Scratch we are looping until the count is bigger than 10//, **in GP we loop while the count less than 11** | So //in Scratch we are looping until the count is bigger than 10//, **in GP we loop while the count less than 11** | ||
| - | === Forever === | ||
| ^ Scratch ^ GP ^ | ^ Scratch ^ GP ^ | ||
| - | | | | | + | | {{:starting:scratch2gp:scr_forevercount.gif|}} | {{:starting:scratch2gp:gp_animatecount.png|}} \\ This is direct replacement.\\ It will loop forever and wait for screen to\\ refresh between each loop so you\\ don’t get any flicker | |
| - | | This is direct replacement – it will loop forever and wait for screen to refresh between each loop so you don’t get any flicker | This will do same as above but is “better” GP way of doing it. The while is always true and the wait waits for the screen to refresh | | + | | | {{:starting:scratch2gp:gp_whilewaitcount.png|}} \\ Alternatively, we could use a while loop\\ with an added wait at the end\\ which will work exactly the same way | |
| - | Fastest way to loop forever without waiting for screen refreshes | + | === If and If/Else === |
| - | If and If/Else | + | |
| - | Scratch GP | + | |
| - | + | ^ Scratch ^ GP ^ | |
| - | + | | {{:starting:scratch2gp:sct_if-1.gif|}} | {{:starting:scratch2gp:gp_if-1.png|}} | | |
| - | + | | {{:starting:scratch2gp:scr_ifelse.gif|}} | {{:starting:scratch2gp:gp_ifelse-4.png|}} | | |
| GP uses one combined if block instead of Scratch’s two types. It can be changed from if to if/else by simply clicking on the black arrow | GP uses one combined if block instead of Scratch’s two types. It can be changed from if to if/else by simply clicking on the black arrow | ||
| - | GPs if/elseif block is much more powerful than the simple example above and can save a lot of nested if statements which leads to your code being easier to read and debug 🙂 | + | GPs if/elseif block is much more powerful than the simple example above and can save a lot of nested if statements which leads to your code being easier to read and debug |
| ==== Graphics ==== | ==== Graphics ==== | ||
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| The one thing that is the same is the Pen category that lets your draw over the screen just as in Scratch. | The one thing that is the same is the Pen category that lets your draw over the screen just as in Scratch. | ||
| - | One major change is that there is no actual Stage (Scratch 1.4) or Background (Scratch 2). So if you want a background image you create a big costume (GP screen size is 800 x 600 unlike Scratch’s 480×360) and just don’t move it around | + | === Stage/Background === |
| + | |||
| + | There is no actual Stage (Scratch 1.4) or Background (Scratch 2). | ||
| + | |||
| + | But you can easily simulate this by creating a class with a big costume (GP screen size is 800 x 500 unlike Scratch’s 480×360) and just don’t move it around. | ||
| + | |||
| + | === Costumes === | ||
| GP only comes with 2 images (the Ship and the GP one) but you can load in any .png image and set the instances costume to it very easily. | GP only comes with 2 images (the Ship and the GP one) but you can load in any .png image and set the instances costume to it very easily. | ||
| - | I have converted all the Scratch 1.4 images to .png and re-sized the background ones to be 800×500. The zipped file of these images is available here. I believe the Scratch Creative Commons Attribution-ShareAlike 2.0 license allows them to be used in GP but if anyone knows differently, please let me know | + | Simon Walters has converted all the Scratch 1.4 images to .png and re-sized the background ones to be 800×500. The zipped file of these images is available here. |
| + | |||
| + | ==== Other notable differences ==== | ||
| + | |||
| + | === Timer === | ||
| + | |||
| + | The timer counts up in milliiseconds (thousanths of seconds) and there is no reset timer block. So you have to set a variable, say starttime, to timer value and then subtract the timer from your starttime and divide it by 1000 to get the time difference in seconds. | ||
| - | Other notable differences | + | === Touching === |
| - | The timer counts up in milliiseconds (thousanths of seconds) and there is no reset timer block. So you have to set a variable, say starttime, to timer value and then subtract the timer from your starttime and divide it by 1000 to get the time difference in seconds | + | |
| - | There is no touching colour or touching edge 🙁 You can only detect touching a class or the mouse) There are complex ways around this but much easier/better to just re-think approaches to coding. | + | There is no touching colour or touching edge. You can only detect touching a class or the mouse) |
starting/scratch2gp2.1506776620.txt.gz · Last modified: 2017/09/30 09:03 by 127.0.0.1
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