Shading

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Summary:

What are the fastest ways to shade graphscreen or square areas?

Shading

-Nautilus- (guest) 24 Jan 2016 18:53

I lost my password and i cant retrieve my password. Anyway, im Nautilus, from the previous "Repeat or For loop" post.
What are the different ways to shade the screen? without using assembly, of course.

Ive tried Shade( and a For( loop with vertical and horizontal lines. Yet, i have a feeling there is a faster way to shade the screen. (The description of the Shade( command indicates it is not the fastest shading method, not saying which one is faster though).

Also, i also wanted to know what is the fastest shading method for shading a square in the graph screen (In my situation, it would be more like "de-shading" instead of shading).

Re: Shading

jonbush 24 Jan 2016 22:51

Hello -Nautilus-. You should be able to reset your forgotten password. I see an account called Nautilus1, so you might want to try that username instead.

Anyway, I think the fastest way to shade the entire screen would be something like this:

For(A,Ymin,Ymax,ΔY
Horizontal A
End

To shade a square, you can do a similar thing, except with a few additional variables and Line(. (A,B) is the position of the upper left corner of the square and W is the width:

Prompt A,B,W
For(C,A,A+W,ΔX
Line(C,B,C,B-W
End

You can also use large Text( to erase a region of the screen, which can be much faster. Modify as necessary:

For(C,A,B,7
    Text(~1,C,2,"         "
End

Last edited on 24 Jan 2016 23:00 by jonbush Show more

Nerry (guest) 27 Apr 2017 15:36

Sorry, but what is the little triangle symbol beside the Y, and where can I find it?

Trenly 27 Apr 2017 15:47

That is DeltaY. It is [Vars] then [1] then [9]

Battlesquid 27 Apr 2017 15:59

The delta character is only obtainable through the use of a shell, ur something like CHARS. Using a "sub(" command on DeltaY won't work.

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Trenly 27 Apr 2017 16:08

No, hes asking how to enter DeltaY I think. If you look at the code he is asking about:

For(A,Ymin,Ymax,ΔY
Horizontal A
End

Battlesquid 27 Apr 2017 18:34

Oh, it seems like he thought they were two separate things. I see now, thanks for clarifying :)

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Re: Shading

Nautilus1 25 Jan 2016 00:39

Ok, i got my account back.

As for shading all the screen, i've already tried and it's still quite slow. Anyway, thanks for confirming it is the fastest option.

Relating the square de-shading, im currently using the first option you presented relating squares
Thanks for the Text( technique, it may be really useful. I didnt remember on that option, thankz alot.

I need that de-shading because im working on a quite swaggy custom menu over a black background.
thanks alot for the help. If you ever get to know other fast ways of screen-colouring, plz post it here.

Btw, english isnt my mother language, so if you find any problem decodifying my speach be free to ask.

Last edited on 25 Jan 2016 00:40 by Nautilus1 Show more

Re: Shading

jonbush 25 Jan 2016 01:30

It is interesting that you should be making a custom menu. The Text( technique was developed by earthnite and I for the custom menu in TI-FLOW. If you want you can look at the source code here: http://jonbush.net/portfolio/tiflow . The menu is near the end.

Re: Shading

Nautilus1 26 Jan 2016 23:42

Ill take a look at the code when i have more time, bu it seems like a great game. i guess the underlying principle can use matrixes to make it easier to manage pipe positions. Am i correct?

And as for speaking bout matrixes, could you indicate me a web link with which i can learn how to use matrixes? For instance, i've seen some ti84 snake games on youtube, and one of the videos has in the description a reference to using matrixes. How may matrixes be used in these situations?

Also, info on matrixes is very poor, i guess. For example, none of the web sites answers to the following question: What are the maximum dimensions of matrixes? What's the maximum number of collumns and lines?

Ive done a quite simple pong game and ive concluded the main loop of a quite not-as-bad snake game using lists to monitor its position, but ive already seen many have used matrixes to make it faster, but i can't understand how may matrixes be applied in these situations.

PS: i didnt have much time looking at your game's code. I think i've identified the menu u are referring to, but im not absolutely sure. could you tell me in which line does the menu start? Guess it would be easier to number the lines from the end to the beggining (feeling a bit ashamed though xd)

Last edited on 26 Jan 2016 23:45 by Nautilus1 Show more

Re: Shading

jonbush 27 Jan 2016 03:00

That is correct. The current board state is stored in [A] and the initial board state in [B].

You can look on these pages:
Matrices
Matrices and Their Commands

Technically the limit on matrices is 99x99, however you will run out of RAM before this. Additionally, the color calculators have a limit of 400 elements (20x20, 10x40, etc.).

You probably don't need a matrix for snake. You can use a "circular buffer" as discussed in the tutorial by Kerm Martian here.

The menu is between the "/ /Start of menu" and "//stuff to do when quitting:" comments.