TouchHit(1) registered, but not TouchHit(0)?

Monkey Forums/Monkey Bug Reports/TouchHit(1) registered, but not TouchHit(0)?

sandfella

(Posted 2013) [#1]

Here's my test code:

Import mojo

Class Game Extends App

	Method OnCreate ()
		SetUpdateRate 30
	End
	
	Method OnUpdate ()
	
		Local i:Int
		For i=0 To 3
'			Print "down["+i+"]"+TouchDown(i)
			Print "hit["+i+"]"+TouchHit(i)
			Print "coord x["+i+"]"+TouchX(i)
		Next
		
	End
	
	Method OnRender ()
		
		
		Cls 32, 32, 32
		
		
		DrawText "Yay", 100,100

	End
	
End

Function Main ()
	New Game
End

I run it on android and tried tapping the screen with two fingers (first left, then right, then left etc... quickly), and I got the following debug info:

1 I/[Monkey]( 1120): hit[0]1
2 I/[Monkey]( 1120): coord x[0]526.0
3 I/[Monkey]( 1120): hit[1]0
4 I/[Monkey]( 1120): coord x[1]488.0
5 I/[Monkey]( 1120): hit[2]0
6 I/[Monkey]( 1120): coord x[2]0.0
7 I/[Monkey]( 1120): hit[3]0
8 I/[Monkey]( 1120): coord x[3]0.0

9 I/[Monkey]( 1120): hit[0]0
10 I/[Monkey]( 1120): coord x[0]524.0739
11 I/[Monkey]( 1120): hit[1]0
12 I/[Monkey]( 1120): coord x[1]488.0
13 I/[Monkey]( 1120): hit[2]0
14 I/[Monkey]( 1120): coord x[2]0.0
15 I/[Monkey]( 1120): hit[3]0
16 I/[Monkey]( 1120): coord x[3]0.0

17 I/[Monkey]( 1120): hit[0]0
18 I/[Monkey]( 1120): coord x[0]522.0
19 I/[Monkey]( 1120): hit[1]1
20 I/[Monkey]( 1120): coord x[1]332.0
21 I/[Monkey]( 1120): hit[2]0
22 I/[Monkey]( 1120): coord x[2]0.0
23 I/[Monkey]( 1120): hit[3]0
24 I/[Monkey]( 1120): coord x[3]0.0

These lines were most interesting:

17 I/[Monkey]( 1120): hit[0]0
18 I/[Monkey]( 1120): coord x[0]522.0
19 I/[Monkey]( 1120): hit[1]1
20 I/[Monkey]( 1120): coord x[1]332.0

How is it possible for touchhit(1) to register a press, since there's no touchhit(0) on that nor on the previous round (lines 9 and 17)?

To my understanding, the line 17 should have "hit[0]1", and line 19 should be "hit[1]0".

Also, why I can get coordinates, even when there's no touch (not a problem, just curious)

What am I missing here?

Documentation says about TouchHit:int(index:int)

Returns the number of times the specified finger has made contact with the touchscreen since the last OnUpdate.
Note that index refers to the order touches have been made. The first finger to touch the touchscreen will be assigned index 0. If another finger then also touches the touchscreen, it will be assigned index 1 and so on.

If a finger is touching, you can get its x and y coordinates using the TouchX and TouchY commands.

marksibly

(Posted 2013) [#2]

Not quite sure what you mean, but finger '0' begins touching at line 1, while finger '1' begins touching at line 19 - after this, both fingers are touching.

TouchHit only returns 1 the first time a finger makes contact. After that, it will return 0 until the finger is released and then pressed again.

Use TouchDown instead to determine if finger is 'continuously' in contact.

> Also, why I can get coordinates, even when there's no touch (not a problem, just curious)

Because it's convenient! I guess reading TouchX/TouchY could cause a runtime error/exception if finger isn't down, but I'm not sure what that'd achieve.

sandfella

(Posted 2013) [#3]

Ok, I think I got it... thanks Mark.

I thought I lifted finger '0'

(as for the TouchX/Y, doesnt really matter, was just curious :)