13 replies to this topic

[Boreal]

• Title: Mouse Gesture Recognition Engine
• Description: Converts shapes drawn by the user's mouse to simple strings of directions
• GM Version: GM 8.1
• Registered: Yes, because it uses ds_lists
• File Type: .gm81
• File Size: 10.01KB
• File Link: http://www.mediafire...mjojqdqf249jxqi
• Required Extensions: None
• Required DLLs: None

Summary
This is a simple engine that converts a shape drawn by the mouse (well, a list of 2D vectors to be precise) to a string of cardinal directions (Left, Up, Right, Down). It can be used to change handwriting into text, for quick navigation in a complex program, drawing symbols to perform actions in an RPG, and really anything that can use mouse gestures.

I've commented the larger and less obvious blocks of code, and indicated which parts are not part of the core engine, that is, just for testing purposes. You will probably be using something similar to the large switch statement that picks the right action for each correctly drawn gesture, however.

Spoiler

GMCTUTORIAL

• GMCGESTURE

[icuurd12b42]

Well done, but the circle does not work when you start it from the top

[Boreal]

Well done, but the circle does not work when you start it from the top

Ah, that is due to how the gesture is recognized. It is currently only set to be R-U-L-D-R, not L-D-R-U-L

And an instant staff pick? Wow!

[icuurd12b42]

Yeah, it's simple to understand and efficient. You may want to change the way you round the angle to get the 0-3 value using this code here:

d = floor(((point_direction(0,0,u,v)+180/4) mod 360)/(360/4))


The method you use has some shortfalls which I describe and demonstrate here
http://gmc.yoyogames...howtopic=345666

[Boreal]

Yeah, it's simple to understand and efficient. You may want to change the way you round the angle to get the 0-3 value using this code here:

d = floor(((point_direction(0,0,u,v)+180/4) mod 360)/(360/4))


The method you use has some shortfalls which I describe and demonstrate here
http://gmc.yoyogames.com/index.php?showtopic=345666

Wouldn't using point_direction() to get the angle never go under 0 or above/equal to 360?

[icuurd12b42]

Yes, I just copied the line from my tut and dropped your point direction and your 4 in it.


Actually, never mind what I said. you used round() so the result is proper.

[napalmgamer]

What the heck is a GM81 file?
Isn't it supposed to be GMK?
How do you make Game maker Read This?

Please Help

[Dark Matter]

What the heck is a GM81 file?
Isn't it supposed to be GMK?
How do you make Game maker :GM8: Read This?

Please Help

It's a GameMaker 8.1 file. You can find a converter here.

[martan92]

My computer crashed(blue screen then reboot) when running the game(when drawing). Could have something to do with memory(memory leak or something), maybe you should give a heads up or something.

[Boreal]

My computer crashed(blue screen then reboot) when running the game(when drawing). Could have something to do with memory(memory leak or something), maybe you should give a heads up or something.

All I'm doing in terms of memory when drawing is adding to lists and clearing lists. I don't have any idea what could be happening to you.

[Nocturne]

My computer crashed(blue screen then reboot) when running the game(when drawing). Could have something to do with memory(memory leak or something), maybe you should give a heads up or something.

It is more than likely just an unhappy coincidence... I think that this certainly could not cause a BSOD! Check your hardware...

[martan92]

My computer crashed(blue screen then reboot) when running the game(when drawing). Could have something to do with memory(memory leak or something), maybe you should give a heads up or something.

It is more than likely just an unhappy coincidence... I think that this certainly could not cause a BSOD! Check your hardware...

I don't think so, it happened 3 times in a row whenever I just click when running this program.

[ddan49]

Okay, so I just want to say...

WOW. This is really, really nice... in fact, this is probably a massive component of a successful game. I'm pretty sure this is what differentiates a cheap homemade game from a commercial one. Keep up the good work!

P.S. I would be very surprised if this wasn't an instant staff pick... it works and is easy to read (I'm COMPLETELY new to GML), and is also a coveted gameplay mechanic.

[greyzebra]

Very nice. Thank you!