I don't need this...

LucaMs · Apr 24, 2018

Often I try to imagine how it is possible to create certain things.

A "simple" graphic tool can do this, for example:

I don't need this in my apps, but I don't know how I could do it.

Many effects are fascinating (as are many algorithms, such as those for chess games and many others).

LucaMs · Apr 24, 2018

or this one:
https://www.b4x.com/android/forum/t...r-pixels-drawings-and-more.92050/#post-582230

[752 Kb, then I can not attach the animated gif ]

alwaysbusy · Apr 24, 2018

it is all math

I once made these just for fun to find out how it worked. In another language, but I stopped working with it because it was/is actually very bad handling graphics. They would be a lot better if I would've known B4J back then...

This one was done in only 100 lines of code:

This was a lot bigger to build :

LucaMs · Apr 24, 2018

I know a little of trigonometry

It's the "brush" and drawing at runtime that I don't know.

[NOW I remember your first wonderful video - cables ]

P.S. with shadows ! Beautiful !

[No short circuit? ]

Star-Dust · Apr 24, 2018

See this: https://www.b4x.com/android/forum/threads/bezier-curve.92298/

moster67 · Apr 24, 2018

Star-Dust said:
See this: https://www.b4x.com/android/forum/threads/bezier-curve.92298/

..and the B4A-magician arrived promptly with an example.
You never never stop to surprise me @Star-Dust

Star-Dust · Apr 24, 2018

moster67 said:
..and the B4A-magician arrived promptly with an example.
You never never stop to surprise me @Star-Dust

Thank you, but it's an algorithm I've been studying at school. We did it in Turbo Pascal and then translated it into VB4.

Now I've only translated it into B4A, so no surprises.

Anyway what LucaMs is looking for is called C-Spline. If I find it I translate it too ... but they are too old files, about 20 years ago I do not know if still the Backup CD is still legible

ilan · Apr 24, 2018

or this: https://www.b4x.com/android/forum/threads/bézier-curve-my-own-algorithm.91626/

ilan · Apr 24, 2018

hmmm, i just found your challenge interesting so i spent about 1h on it.

LucaMs · Apr 24, 2018

Star-Dust said:
what LucaMs is looking for

LucaMs (who? ) was only "thinking" on how you can draw a simple curve; point after point???

LucaMs · Apr 24, 2018

ilan said:
hmmm, i just found your challenge interesting so i spent about 1h on it.

Perfect

P.S. Almost

ilan · Apr 24, 2018

alwaysbusy said:
This was a lot bigger to build

you really made the car demo by yourself @alwaysbusy ??

ilan · Apr 24, 2018

LucaMs said:
Perfect

you own me now 1h from your life!

LucaMs · Apr 24, 2018

But this my real question:

LucaMs said:
how you can draw a simple curve; point after point???

ilan · Apr 24, 2018

LucaMs said:
But this my real question:

what do you mean Luca?

you draw points and then lines between them

ilan · Apr 24, 2018

LucaMs said:
But this my real question:

do you need an example code?

LucaMs · Apr 24, 2018

... I remember that to draw a line using the Basic of my TI/994a this machine taken about 1h for 200px
This is why I'm asking... prev. post.

ilan said:
you draw points and then lines between them

Yes, but there is DrawLine (canvas) to draw a straight line.

ilan said:
do you need an example code?

Yes, thank you, but very little, just a single curve.

Star-Dust · Apr 24, 2018

LucaMs said:
But this my real question:

Both I and Ilan have attached the code, take a look and take away the doubts

ilan · Apr 24, 2018

LucaMs said:
Yes, thank you, but very little, just a single curve.

here you go my friend (i hope it is what you wanted)

LucaMs · Apr 24, 2018

Star-Dust said:
Both I and Ilan have attached the code

I thought... but Ilan's project is a jar

I will check yours.

I don't need this...

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