sprites...almost got it down, just not quite

BlitzMax Forums/BlitzMax Beginners Area/sprites...almost got it down, just not quite

XxGuardianKnightxX

(Posted 2009) [#1]

I have started on a fairly-complex sidescroller with the working title "Guardian Knights." Wait, why am I telling you this? It's irrelevant to the question at hand!

Anyways, due to the large amount of code I created a separate import/include file for the player setup "GKPLAYR.BMX" to put into the (currently very tiny) main source file "GKMAIN.BMX" Gosh I love typing those filenames like that it's so fun.

'**************************
'*    GUARDIAN KNIGHTS    *
'*      version 0.03      *
'*                        *
'*  painstakingly recoded *
'*      in BlitzMax       *
'*                        *
'*     2009 Nick Hagen    *
'*                        *
'*   adept25@...  *
'**************************

'****** Init Section ******

Graphics 640,480,0

'Imported files
Import "GKPLAYR.bmx"

GKMAIN so far...when I run it it undoubtedly fails but it gives me this strange and scary compile error:
"Unable to convert from 'Int' to 'brl.max2d.TImage'

Anyways, here's GKPLAYR

'*** Include this in the main code ***
' Nick Hagen 5-19-2009



Global RunLeft: Int = False, RunRight: Int = False
Global StandLeft: Int = False, StandRight: Int = False

Global AimDir: Int 'The 8 total directions player can aim/face

'Moving (runnin) speed
Const MoveSpeed: Int = 5

'Define Sprites
spr_p1_SndL: TImage = LoadAnimImage("gfx\csa1sndl.png",64,64,0,4)
spr_p1_SndR: TImage = LoadAnimImage("gfx\csa1sndr.png",64,64,0,4)
spr_p1_RunL: TImage = LoadAnimImage("gfx\csa1runl.png",64,64,0,8)
spr_p1_RunR: TImage = LoadAnimImage("gfx\csa1runr.png",64,64,0,8)

'****** Types *************

'Define Player
Type t_player

	Field x_pos:Int, y_pos:Int 'X and Y positions
	Field sprite: TImage = spr_p1_SndR 'Start standing right
	Field state:Int 'Player's state

	'Player's methods
	Method UpdateState()
	
		'Move left
		If KeyDown(KEY_LEFT) Then
		
			AimDir = 0 '0 is left
			RunLeft = True
			sprite = spr_p1_RunL
			
			'Stand left
			ElseIf Not KeyDown(KEY_LEFT) And AimDir = 0 Then
			
				RunLeft = False
				sprite = spr_p1_SndL
			Else
			
		EndIf

		'Move right
		If KeyDown(KEY_RIGHT) Then
		
			AimDir = 4 '4 is right
			RunRight = True
			sprite = spr_p1_RunR
		Else
		
			RunRight = False
			sprite = spr_p1_SndR
		EndIf

	End Method
	
End Type

I am quite proud of how I wrote all this out: I think I have the concept down (different sprite animations for standing, running, jumping, shooting, etc.) but something's not right. Can you point me in the right direction and tell me what I did wrong?

If you're confused with what I've said so far then I'll clarify for you.

Nate the Great

(Posted 2009) [#2]

I think when you define sprites, you must declare them global so they will not be auto declared as ints inside the type. I am not sure though

XxGuardianKnightxX

(Posted 2009) [#3]

I think when you define sprites, you must declare them global so they will not be auto declared as ints inside the type. I am not sure though

Tried it, didn't get any errors either :P

All I need to do now is actually code the player data. Can you tell me a bit more about IMPORT?

I LOVE your username btw. I spent many hours of my childhood reading those awesome books XD

Stu_ovine

(Posted 2009) [#4]

The error you are getting is because you are incorrectly storing the "players state".

Field state:Int 'Player's state

should be

Field state:Timage  'Player's state

This means when you come to draw your sprite you would just drawimage state, x,y. Dont forget to put in a variable that keeps a track of the animation frame that you are on, which gets reset everytime you change the players sprite.

This method is ok for a start but you need to invest the time into creating a little sprite engine, makes life a whole lot easier.....

IMPORT simply inserts your other BMX file into the file when its compiled.

Ahhhh put SUPERSTRICT or STRICT as the first line of your main BMX file, makes life easier in the long run.