If-Then Statements

Monkey Forums/Monkey Programming/If-Then Statements

time-killer-games

(Posted 2012) [#1]

Here is my current code:

Import mojo
Import monkey
Import diddy
Import "C:\Users\Joseph\Documents\SleepingDisorder\animation001_strip24.png"
Import "C:\Users\Joseph\Documents\SleepingDisorder\cursor01.png"
Import "C:\Users\Joseph\Documents\SleepingDisorder\cursor02.png"

Global anim_cnt:Int = 0
Global animation:Image
Global Cursor01:Image
Global Cursor02:Image
Global Click0001:Bool = False
Global SetCursor0001:Bool = False
Global myGame:MyGame
'*************************************************************************

' THIS IS THE MAIN CLASS
'**************************
Function Main:Int()
	myGame = New MyGame
	Return 0
End Function
'**************************

Class MyGame Extends App
	Method OnCreate:Int()
		HideMouse()
		SetUpdateRate 30
		Cursor01 = LoadImage("cursor01.png")
		Cursor01 = LoadImage("cursor02.png")
		animation = LoadImage("animation001_strip24.png", 640, 480, 24) 'ANIMATION STRIP IS 64X64 WITH 16 IMAGES IN IT
		Return 0
	End
	
	Method OnLoading:Int()
		Return 0
	End
	
	Method OnUpdate:Int()
		Return 0
	End
	
	Method OnRender:Int() 
		Cls 0, 0, 0								
		DrawImage(animation, 0, 0, anim_cnt)
		If Click0001=True Then anim_cnt += 1								
		If anim_cnt > 23 anim_cnt = 23
		If MouseX<100 And MouseY<480 Then SetCursor0001=True
		If SetCursor0001=True Then DrawImage(Cursor02,MouseX-32,MouseY-32) 
		If SetCursor0001=False Then DrawImage(Cursor01,MouseX-32,MouseY-32)
		Return 0
	End
End

I'm making a pre-rendered 3d point-and-click puzzle adventure game. Here's what I'd linke to know:

How to use If-Then statements, I used to make games with GamaMaker but decided to move on into using Monkey.

This is what I'm us to doing with If-Then statements:

if (<variable/function>==<returnvalue>)
{/*Enter more code here*/}

But that isn't how Monkey works, you can't use "{}"
Every time I try to use an If-Then statement it returns this error:

Monkey Runtime Error : TypeError: Error #1009

?<?>

I'm not really sure what I'm doing wrong here, I want the cursor image to change when its x/y positions are less than 100/480 and change back to the default cursor when the mouse isn't hovering over that area.

Is there a better tutorial on how to use the If-Then statement? The Docs aren't really helping me.

Thanks!
TKG

Paul - Taiphoz

(Posted 2012) [#2]

[monkeycode]
If var = 1 then
'do something in here.
End if

If(var = 1) or (var = 2)
'do something
End if

if(var = 1)
'var = 1
else
'var does not = 1
EndIf

if(var = 1) And (var = 1)
'var is 1 DUH!
Print "Var = 1"
ElseIf(var = 2)
Print "Var = 2"
ElseIf(var = 3)
Print "Var = 3"
EndIf
[/monkeycode]

think this is what you were asking sorry just glanced over your post cos im in a rush..

Paul - Taiphoz

(Posted 2012) [#3]

I should say that I like to nest everything i find it makes things so much simpler to read, at least it does for me.

Jesse

(Posted 2012) [#4]

most blocks start with a statement and end with the "End". For the If block the "End" can be interchanged with "EndIf".

If statement 
  'block of code
End

you can make do with out the "End/EndIf" for the "If" command but the block has to be done in the same line

If <comparison> Then <block of code>

Paul - Taiphoz

(Posted 2012) [#5]

For example your little bit of code, when done with a nested if then else.

[monkeycode]

If SetCursor0001=True
DrawImage(Cursor02,MouseX-32,MouseY-32)
Else
DrawImage(Cursor01,MouseX-32,MouseY-32)
EndIF

[/monkeycode]

therevills

(Posted 2012) [#6]

And if you want you can just use "End":
[monkeycode]If x = y
'Do something
End[/monkeycode]

BTW Why are you importing your images at the top of your file?

Paul - Taiphoz

(Posted 2012) [#7]

lol therevills, I was wondering the same.

muddy_shoes

(Posted 2012) [#8]

Maybe he doesn't want to have to keep copying files from his asset library to the data folder every time he changes them or has to clean his monkey project.

therevills

(Posted 2012) [#9]

Also you dont have to "import monkey"...

time-killer-games

(Posted 2012) [#10]

I imported the images because that is the only way I can to get them in the data folder, if I just drag and drop the images from where ever to the data folder every time I build the files in the data folder seem to get deleted.

Thanks everyone. Got it working.

therevills

(Posted 2012) [#11]

You need to set up your project as follows:

\projectFolder
    \project.data
        \animation001_strip24.png
        \cursor01.png
        \cursor02.png
    \project.monkey

I find it a bit strange and annoying that we have to create the data folder with the prefix of the project name...

Check out this tutorial: http://blitz-wiki.appspot.com/Drawing_with_Images

Nobuyuki

(Posted 2012) [#12]

therevills: nice to have that tutorial there, I wonder if there's more? According to the wiki, no page links to it, so it's an orphan? Without a search option or a proper index, there'd be no way to find pages like this!

(edit: found the index. That darn wiki still needs a search/goto option..)

therevills

(Posted 2012) [#13]

I found that tutorial in the Tutorial section on the left hand side of the wiki ;)

http://blitz-wiki.appspot.com/Tutorials