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Need help with drawing 2D sprites in D3D9


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#1 littletray26   Members   -  Reputation: 267

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Posted 18 October 2012 - 01:26 PM

Hey GameDev

I've been doing a bit of 3D programming lately, and about 10 minutes ago decided I felt like making a small 2D application.

This was all well and good until I tried to make a sprite follow the mouse coords. This problem I would say is affecting all my sprites positions but I only noticed it when I was using it to track my mouse. The texture is not drawing where it should be. Now my first assumption is a problem with the size of my back buffer in relation to my window size. The back buffer and window size are both set to 800 x 600 and I've heard you're supposed to do something to compensate for the window borders but I don't know what that is exactly. I'll show you a screen show of the difference of coords to mouse. It seems the further down I move the mouse, the more it the mouse is close to the textures middle (where it should be)

If it makes any difference, I'm tracking mouse movement with GetCursorPos(). The sprite is 50 x 50

sprite->Draw(test, NULL, &D3DXVECTOR3(0, 0, 0),
	 &D3DXVECTOR3(mousePos.x - 25, mousePos.y - 25, 0),
	 D3DCOLOR_XRGB(255, 255, 255));

Don't mind my bad quality sprite. It was just something I put together to see if it was working. The green mouse represents my cursor as it doesn't show up in screenshots.

Attached Thumbnails

  • test.png

The majority of Internet Explorer users don't understand the concept of a browsing application, or that there are options.
They just see the big blue 'e' and think "Internet". The thought process usually does not get much deeper than that.

Worms are the weirdest and nicest creatures, and will one day prove themselves to the world.

I love the word Clicky :)

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#2 littletray26   Members   -  Reputation: 267

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Posted 18 October 2012 - 01:36 PM

I confirmed that it's because of the Windows Borders by changing it from WS_OVERLAPPEDWINDOW to WS_POPUP and then it's fine.

So the question is now, how do I combat the effect of the Window borders?
The majority of Internet Explorer users don't understand the concept of a browsing application, or that there are options.
They just see the big blue 'e' and think "Internet". The thought process usually does not get much deeper than that.

Worms are the weirdest and nicest creatures, and will one day prove themselves to the world.

I love the word Clicky :)

#3 littletray26   Members   -  Reputation: 267

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Posted 18 October 2012 - 03:57 PM

BUMP
The majority of Internet Explorer users don't understand the concept of a browsing application, or that there are options.
They just see the big blue 'e' and think "Internet". The thought process usually does not get much deeper than that.

Worms are the weirdest and nicest creatures, and will one day prove themselves to the world.

I love the word Clicky :)

#4 littletray26   Members   -  Reputation: 267

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Posted 21 October 2012 - 03:21 AM

I really need this answer and don't know what to google for it. Anybody? :(
The majority of Internet Explorer users don't understand the concept of a browsing application, or that there are options.
They just see the big blue 'e' and think "Internet". The thought process usually does not get much deeper than that.

Worms are the weirdest and nicest creatures, and will one day prove themselves to the world.

I love the word Clicky :)

#5 RulerOfNothing   Members   -  Reputation: 1164

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Posted 22 October 2012 - 01:45 AM

Well, it clearly states that GetCursorPos returns the mouse position in screen co-ordinates, so yes, you do need to account for the position of the window's client area. As it turns out, there is a function that will turn screen co-ordinates into client co-ordinates, called ScreenToClient. Does this help?

#6 littletray26   Members   -  Reputation: 267

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Posted 22 October 2012 - 01:58 AM

Does this help?


Nah, that didn't fix the problem but thank you for replying :)
The majority of Internet Explorer users don't understand the concept of a browsing application, or that there are options.
They just see the big blue 'e' and think "Internet". The thought process usually does not get much deeper than that.

Worms are the weirdest and nicest creatures, and will one day prove themselves to the world.

I love the word Clicky :)

#7 RulerOfNothing   Members   -  Reputation: 1164

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Posted 22 October 2012 - 02:06 AM

To be more specific, GetCursorPos and ScreenToClient both take pointers to Point structures, so if you used:
GetCursorPos(&mousePos);
ScreenToClient(hWnd, &mousePos);
where hWnd is the handle of your main window, then you can use mousePos without changing the co-ordinates.

#8 littletray26   Members   -  Reputation: 267

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Posted 22 October 2012 - 02:12 AM

To be more specific, GetCursorPos and ScreenToClient both take pointers to Point structures, so if you used:
GetCursorPos(&mousePos);
ScreenToClient(hWnd, &mousePos);
where hWnd is the handle of your main window, then you can use mousePos without changing the co-ordinates.


Yeah I read the link. Thanks but that didn't work :/
The majority of Internet Explorer users don't understand the concept of a browsing application, or that there are options.
They just see the big blue 'e' and think "Internet". The thought process usually does not get much deeper than that.

Worms are the weirdest and nicest creatures, and will one day prove themselves to the world.

I love the word Clicky :)

#9 Erik Rufelt   Crossbones+   -  Reputation: 3643

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Posted 22 October 2012 - 05:59 AM

AdjustWindowRectEx is what you need, if you want to create a window that has exactly a 800x600 (or other predefined) client area.
http://msdn.microsoft.com/en-us/library/windows/desktop/ms632667%28v=vs.85%29.aspx

Alternatively create your window first, then use GetClientRect to get the actual client-area and create a matching back-buffer (which won't be the same size as the window dimensions).

#10 littletray26   Members   -  Reputation: 267

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Posted 22 October 2012 - 07:46 AM

AdjustWindowRectEx is what you need, if you want to create a window that has exactly a 800x600 (or other predefined) client area.


That did it! Thank you so much :D
The majority of Internet Explorer users don't understand the concept of a browsing application, or that there are options.
They just see the big blue 'e' and think "Internet". The thought process usually does not get much deeper than that.

Worms are the weirdest and nicest creatures, and will one day prove themselves to the world.

I love the word Clicky :)




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