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Re: Chapter 16 Top-Down Scroller XNA 2.0 Source Code Error

groundh0g — Fri, 14 Mar 2008 04:03:32 GMT

Thanks for the follow up, Edt. I'll add updating the source for chapter 16 to my list of TODO's.

-- joe

Re: Chapter 16 Top-Down Scroller XNA 2.0 Source Code Error

Edt — Fri, 14 Mar 2008 03:40:04 GMT

I added the line:

GraphicsDevice.Textures[0] = null;

in the beginning of the Game1.Update() function and it worked.

Re: Chapter 16 Top-Down Scroller XNA 2.0 Source Code Error

Zeo — Thu, 13 Mar 2008 20:44:45 GMT

The exception was indeed an InvalidOperationException which read "The operation was aborted. You may not modify a resource that has been set on a device, or after it has been used within a tiling bracket."

I attempted to add GraphicsDevice.Textures[0] = null; before GameObjectManager.Init(); in the Initialize() function of the Game1 class. But that didn't solve the problem.

Re: Chapter 16 Top-Down Scroller XNA 2.0 Source Code Error

groundh0g — Thu, 13 Mar 2008 18:09:43 GMT

The phrase "an exception" is too general to know for sure, but I'm guessing that this is realted to the issue that I described for Chapter 5's convertion to XNA 2.0.

[The exception would read something like this: "The operation was aborted. You may not modify a resource that has been set on a device, or after it has been used within a tiling bracket."]

Read the section entitled "Dynamically Modifying Resources (Bug?)" under the description for my XNA 2.0 changes for Chapter 05.

Here's the link: http://codetopia.com/cs/files/7/xna_book_files/entry382.aspx

Please let me know if that works for you. If so, I'll update the source code for that chapter and post it again.

Thanks.
-- joe

Chapter 16 Top-Down Scroller XNA 2.0 Source Code Error

Zeo — Wed, 12 Mar 2008 02:42:16 GMT

After compiling and testing the new code the game experiences an exception after pressing start. The exception occurred in the PixelPerfectHelper::GetOpaqueData function at this point:

texture.GetData<Color>(pixels);

As I attempted a work around by putting the above line inside a try and catch statement the result was that collision detection was effectively disabled. Reading the comment regarding the above line I tried using this instead:

texture.GetData<Color>(1, rect, pixels, 0, texture.Width * texture.Height);

I'm not too savy with texture data reading and the above line didn't solve the problem. Any help would be appreciated. Thanks :)