GUI.Button flipped not working

Questions & Answers
1

i have a 6 button with image of a rocket assigned to them, on my main screen i need alternate buttons to point different direction[image of rocket]. so i came up with the the following

//Button1
GUI.Button(new Rect(posX,posY,Scalex,ScaleY),"PLAY",m_GuiSkin.customStyles[2]) ;
//Button2
GUI.Button(new Rect(posX,posY,-Scalex,ScaleY,"settings",m_GuiSkin.customStyles[2]) ;

But the button 2 dose not take click or hover…

//SETTINGS BUTTON
				if(GUI.Button(new Rect(Screen.width * (0.84f/6.55f),Screen.height * (1.54f/6.3f),
							Screen.width * (3.744f/6.55f),Screen.height * (0.5967f/6.3f)),"SETTINGS",m_GuiSkin.customStyles[2]) )
				{
				if(m_Sound)
						BtnClick_Audio.audio.Play();
				    m_Gamestate = GameState.Settings;
					
				}
				
				//HIGHSCORE BUTTON
				if(GUI.Button(new Rect(Screen.width * (0.84f/6.55f),Screen.height * (2.28f/6.3f),
							-Screen.width * (3.744f/6.55f),Screen.height * (0.5967f/6.3f)),"HIGHSCORE",m_GuiSkin.customStyles[2]) )
				{
				if(m_Sound)
						BtnClick_Audio.audio.Play();
				   m_Gamestate = GameState.HighScore;
				}
2

A negative scale does not work the way you might expect it. All mouse events will fail because the rect has a negative size.

Rect.Contains is defined like this:

public bool Contains(Vector3 point)
{
    return point.x >= this.xMin && point.x < this.xMax && point.y >= this.yMin && point.y < this.yMax;
}

and xMax is defined like this:

public float xMax
{
    get
    {
        return this.m_Width + this.m_XMin;
    }
}

So when you have a Width smaller than 0 Rect.Contains will always return false and therefor can never detect hover / click / …

A Rect should never be used with a negative size.

You have two possibilities:

  • draw the button manually which means you have to handle the click yourself.
  • Use two textures, and one inverted.

As a final note: You really should use the style names instead of using indices into the customStyles array:

void OnGUI()
{
GUI.skin = m_GuiSkin;
// […]
GUI.Button(new Rect(posX,posY,Scalex,ScaleY), “PLAY”, “MyButtonStyleName”);
}