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Look at point

Started by aker_jus Mar 10, 2003 at 5:16 AM 3 replies 200+ views

Original Post

Mar 10, 2003 at 5:16 AM

I am making a function so my mesh can be rotated to look at a certain point and I am using D3DXMatrixLookatLH to get the matrix from the vector. This is how I multiply my matrices (without the lookat matrix)

D3DXMatrixMultiply(&meshes.attributes.mMatrix, &meshes.attributes.mScalingn, &meshes.attributes.mRotation);
D3DXMatrixMultiply(&meshes.attributes.mMatrix, &meshes.attributes.mMatrix, &meshes.attributes.mPosition);

Ok, the above transformation code works. But I do not know what to do with the new matrix from the LookAtLH, how to multiply it with the others. Can someone help me here? Thanks a lot

aker_jus

Mar 10, 2003 at 9:37 AM

^up

aker_jus

Mar 11, 2003 at 6:55 AM

bump bump bump
cant you even say something?

Osc

Mar 11, 2003 at 8:05 AM

quote:

bump bump bump
cant you even say something?

Maybe if you gave people enough information to be able to answer your question then you''d get more replies ;->

You haven''t said whether you''re calculating your look matrix in world space or in the local space of the mesh.

You haven''t said how the mesh needs to be oriented to ''look'' in a given direction.

In the absence of these facts, I''d take a wild guess that you need to replace ''&meshes.attributes.mRotation'' with ''&lookMatrix'' in your first line of code.

HTH

aker_jus

Mar 11, 2003 at 8:58 AM

Ok, sorry for the lack of information. I will try that.

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