My X Mesh won't rotate c++ directx

Math and Physics Programming

Started by ramilolz April 13, 2011 10:43 PM

1 comment, last by ramilolz 13 years ago

100

Author

April 13, 2011 10:43 PM

I have two objects. The problem is that i can't scale and rotate objects, i can only do one of them. if i put scaling code after rotating it will scale. if i rotating code is after scaling it will rotate. I don't really know why this is happening.
here is my code



void AnimatedMesh::UpdateFrameMatrices(const D3DXFRAME *frameBase, D3DXMATRIX *parentMatrix, Transformation trans)

{

	D3DXFRAME_EXTENDED *currentFrame = (D3DXFRAME_EXTENDED*)frameBase;



	// If parent matrix exists multiply our frame matrix by it

	if (parentMatrix != NULL)

	{

		D3DXMatrixMultiply(&currentFrame->exCombinedTransformationMatrix, &currentFrame->TransformationMatrix, parentMatrix);

		D3DXMatrixRotationYawPitchRoll(&currentFrame->exCombinedTransformationMatrix, trans.Rx, trans.Ry, trans.Rz);

		D3DXMatrixScaling(&currentFrame->exCombinedTransformationMatrix, trans.Sx, trans.Sy, trans.Sz);

	}

	else

		currentFrame->exCombinedTransformationMatrix = currentFrame->TransformationMatrix;



	// If we have a sibling recurse 

	if (currentFrame->pFrameSibling != NULL)

		UpdateFrameMatrices(currentFrame->pFrameSibling, parentMatrix, trans);



	// If we have a child recurse 

	if (currentFrame->pFrameFirstChild != NULL)

		UpdateFrameMatrices(currentFrame->pFrameFirstChild, &currentFrame->exCombinedTransformationMatrix, trans);

}

I Know the problem won't be there but i don't know where it would be

Buckeye

10,754

April 13, 2011 10:50 PM

You need to create a separate matrix each for scaling and rotation. Then multiply all of the matrices together - combined, rotation and scaling.

The way you have it, you're overwriting the combined.

Please don't PM me with questions. Post them in the forums for everyone's benefit, and I can embarrass myself publicly.

You don't forget how to play when you grow old; you grow old when you forget how to play.

ramilolz

100

Author

April 14, 2011 10:34 PM

it didn't work. I still have same result.
here is my new code



D3DXMATRIX w;

		D3DXMATRIX s;

		D3DXMatrixRotationYawPitchRoll(&w, trans.Rx, trans.Ry, trans.Rz);

		D3DXMatrixScaling(&s, trans.Sx, trans.Sy, trans.Sz);

		D3DXMatrixMultiply(&currentFrame->exCombinedTransformationMatrix, &w, &s);

My X Mesh won't rotate c++ directx

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My X Mesh won't rotate c++ directx

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