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POFarseer/XNA Assertion Failed, Vector2 position for body modified by camera matrix
 

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  1. POFarseer/XNA Assertion Failed, Vector2 position for body modified by camera matrix
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    <p>I created a camera with a matrix and used it to move the view point in 2D. Basically I started from this template: <a href="http://torshall.se/?p=272" rel="nofollow">http://torshall.se/?p=272</a></p> <p>I also had in one of my class, a simple code to spawn boxs with the mouse:</p> <pre><code>public void CreateBodies() { mouse = Mouse.GetState(); if (mouse.RightButton == ButtonState.Pressed) { Bodies += 1; if (Bodies &gt;= MaxBodies) Bodies = 0; rectBody[Bodies] = BodyFactory.CreateRectangle(world, ConvertUnits.ToSimUnits(rectangle.Width), ConvertUnits.ToSimUnits(rectangle.Height), 1); rectBody[Bodies].Position = ConvertUnits.ToSimUnits(mouse.X, mouse.Y); rectBody[Bodies].BodyType = BodyType.Dynamic; } } </code></pre> <p>This Worked perfectly fine but when I moved the ''camera'' the mouse didn't change in the right location, Si I did this little modification in game1.cs and in my method to have the world coord. of my mouse:</p> <pre><code>mouse = Mouse.GetState(); Matrix inverse = Matrix.Invert(camera.transform); Vector2 mousePos = Vector2.Transform(new Vector2(mouse.X, mouse.Y), inverse); TE.CreateBodies(mousePos); public void CreateBodies(Vector2 mousePosition) { mouse = Mouse.GetState(); MousePosition = mousePosition; if (mouse.RightButton == ButtonState.Pressed) { Bodies += 1; if (Bodies &gt;= MaxBodies) { Bodies = 0; } rectBody[Bodies] = BodyFactory.CreateRectangle(world, ConvertUnits.ToSimUnits(rectangle.Width), ConvertUnits.ToSimUnits(rectangle.Height), 1); rectBody[Bodies].BodyType = BodyType.Dynamic; rectBody[Bodies].Position = ConvertUnits.ToSimUnits(MousePosition); } } </code></pre> <p>Now this is supposed to give me the world coords. of my mouse, but I have a problem, when I run the program and click somewhere on the screen to create a box I get this error:</p> <p><a href="http://img68.xooimage.com/files/6/a/4/bob-2c526f4.png" rel="nofollow">http://img68.xooimage.com/files/6/a/4/bob-2c526f4.png</a></p> <p>What's going on? :/</p> <p>Edit:</p> <p>This is at the line 439 of body.cs:</p> <pre><code>Debug.Assert(!float.IsNaN(value.X) &amp;&amp; !float.IsNaN(value.Y)); </code></pre>
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    1. USNairda
    1. USNairda
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    1. COyou should see what's on line 439 of dynamics/body.cs
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      1. POFarseer/XNA Assertion Failed, Vector2 position for body modified by camera matrix
      1. USBlackBear
    2. COI found out the answer here: http://stackoverflow.com/questions/3689571/xna-getting-mouse-coordinates-with-a-2d-camera-system-with-rotation-zoom-transl So the problem is over.
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      1. POFarseer/XNA Assertion Failed, Vector2 position for body modified by camera matrix
      1. USNairda
 

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