Matrix overlapping
Monkey Forums/Monkey Beginners/Matrix overlapping
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| Hello there. I encounter a problem with the Matrix use. I need to make a card shake so, i use PushMatrix and PopMatrix in this way.
Strict
Import diddy
Function Main:Int()
New Game()
Return 0
End
Global gameScreen:GameScreen
Class Game Extends DiddyApp
Method Create:Void()
' diddy millisecs version
Seed = RealMillisecs()
gameScreen = New GameScreen
gameScreen.PreStart()
End
End Class
Class GameScreen Extends Screen
' State of game
Field _cardCard:Card
Field _stateCard:Int
Method New()
name = "Game"
End Method
Method Start:Void()
_cardCard = New Card(SCREEN_WIDTH2, SCREEN_HEIGHT2)
End Method
Method Update:Void()
If KeyHit(KEY_1) Then
_stateCard = 1
ElseIf KeyHit(KEY_2) Then
_stateCard = 2
ElseIf KeyHit(KEY_3) Then
_stateCard = 3
ElseIf KeyHit(KEY_4) Then
_stateCard = 4
EndIf
_cardCard.Update()
End Method
Method Render:Void()
Cls
DrawText "Key 1 = HIDDEN CARD, KEY 2 = REVEALED CARD, KEY 3 = SHOWING CARD", SCREEN_WIDTH2, 10, 0.5, 0.5
_cardCard.Draw(_stateCard)
End Method
End Class
Class Card
Const HIDDEN:Int = 1
Const REVEALED:Int = 2
Const SHOWING:Int = 3
Const SHAKING:Int = 4
' Image Field
Field _gfxCard:Image
Field _nFrameOffset:Int
' Coordinate
Field _fXpos:float, _fYpos:Float
' Flip Angle
Field _fScale:Float = -1.0
Method New(_pfXpos:Float, _pfYpos:Float)
_gfxCard = LoadImage("spriteSheet.png", 120, 166, 2, Image.MidHandle)
_fXpos = _pfXpos
_fYpos = _pfYpos
End Method
Method Update:Void()
_fScale += 0.1
End Method
Method GetWidth:Float()
Return _gfxCard.Width()
End Method
Method GetHeight:Float()
Return _gfxCard.Height()
End Method
Method GetXPos:Float()
Return _fXpos
End Method
Method GetYPos:Float()
Return _fYpos
End Method
Method Draw:Void(pCurrentState:int)
Local frame:int
Local scaleX:Float = 1
If pCurrentState = HIDDEN Then
frame = 1
ElseIf pCurrentState = REVEALED Then
frame = 0
ElseIf pCurrentState = SHOWING Then
scaleX = Sinr(_fScale)
If scaleX < 0 Then
frame = 1
Else
frame = 0
EndIf
ElseIf pCurrentState = SHAKING Then
PushMatrix
Translate _fXpos, _fYpos
PushMatrix
DrawImage(_gfxCard, 0, 0, Sinr(_fScale), 1.0, 1.0, frame)
PopMatrix
PopMatrix
EndIf
DrawImage(_gfxCard, _fXpos, _fYpos, 1.0, scaleX, 1.0, frame)
End Method
End Class
The problem that is that when i press on the to shake the card instead of appears alone the card overlap the old one. Where am I wrong? |
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| you are drawing it shaking when shaking and otherwise. You are drawing the card in the last line of the Draw Method(always) and in the else if of the shaking option. |
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| Ok i thought then when you use PushMatrix all the elements not surrounded by Push and Pop disappear and reappear after the Pop. Ok i have changed my code and now it's work fine. Thanks. |
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| You also don't need that many Push and Pops. PushMatrix will push the current transformation onto a stack so that you can get it back when you are done. So in your example you only need: [bbcode] PushMatrix Translate _fXpos, _fYpos DrawImage(_gfxCard, 0, 0, Sinr(_fScale), 1.0, 1.0, frame) PopMatrix [/bbcode] |
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