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PORotating cubes in XNA
 

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    <p>So far I have managed to create a <code>Quaternion</code> for rotation. Only problem is now, how do I apply it to only certain cubes? As when I press the right key on the keyboard at the moment, every cube is being rotated continiously around the origin. </p> <p>For reference, I have 8 cubes positioned in a similar set-up to that of a Rubik's Cube (2x2x2). So when I press the right/left arrow, the right/left face of the 'Cube' (big cube made up of the 8 smaller cubes), rotates 90 degrees clockwise/anti-clockwise.</p> <p>An example of one of the Cubes (out of eight cubes in total) declaration:</p> <pre><code>GameObject subCube3 = new GameObject(); Vector3 subCube3Pos = new Vector3(-0.55f, -0.55f, 0.55f); </code></pre> <p>In my update method:</p> <pre><code>// declare rotation floats float updownRotation = 0.0f; float leftrightRot = 0.0f; // get state of keyboard KeyboardState keys = Keyboard.GetState(); // if key is pressed, change value of rotation if (keys.IsKeyDown(Keys.Right)) { leftrightRot = -0.10f; } // if key is pressed, change value of rotation if (keys.IsKeyDown(Keys.Left)) { leftrightRot = 0.1f; } // if key is pressed, change value of rotation if (keys.IsKeyDown(Keys.Up)) { updownRotation = 0.1f; } // rotation around axis Quaternion addRot = Quaternion.CreateFromAxisAngle(new Vector3(1.0f, 0.0f, 0.0f), leftrightRot); //rotation of cubes cubeRotation = cubeRotation * addRot; </code></pre> <p>My draw function:</p> <pre><code>void DrawGameObject(GameObject gameobject) { //graphics.GraphicsDevice.RenderState.CullMode = CullMode.None; foreach (ModelMesh mesh in gameobject.model.Meshes) { foreach (BasicEffect effect in mesh.Effects) { effect.EnableDefaultLighting(); effect.PreferPerPixelLighting = true; effect.World = Matrix.CreateScale(gameobject.scale) * Matrix.CreateFromQuaternion(cubeRotation) * Matrix.CreateTranslation(gameobject.position); effect.Projection = cameraProjectionMatrix; effect.View = cameraViewMatrix; } mesh.Draw(); } } </code></pre> <p>What I think is the problem is that <code>Matrix.CreateTranslation(gameobject.position)</code> is obviously affecting all my cubes. I've tried creating new <code>Vector3</code> i.e: <code>c_component1 = Vector3.Transform(cube1pos, cubeRotation);</code> but even then, I am unsure where to put that and actually use it.</p> <p>Any ideas anyone? Any help will be much appreciated.</p>
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    1. COI wish I had enough rep to edit your post and fix your code formatting...
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    2. COWow, thank you for such a totally pointless post. If you had nothing worthwhile to say with regards to my actual question and query, why bother post in the thread? If you can't offer help besides commenting on the code format - which is quite obviously this way because I copied it from the file - please troll some other thread. Thanks. DaveT
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    3. COMy comment about your formatting was not intended to be taken personally. But if that's the way you want to play it: If you're too lazy or inept to put the effort into making your post readable, EVEN after it's pointed out to you (the formatting help is not hard to find!), AND you're abusive to somebody who has (*twice* now) taken the time to visit your question with the aim of answering it, AND it turns out your question was just copy-pasted from somewhere in the *middle* of a thread you made on the XNA forum, then I don't see a reason why ANYONE should put any effort into helping you.
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