I think i miss somethings about geometry pipeline. I can't understand why the rotation pivot of my object is a side. See this image for understand the question:
I load model in x format and then from gui i change mAngle of object, then:
//============================================
//World Matrix
D3DXMATRIX matRot;
D3DXMATRIX matRoty;
D3DXMATRIX matTras;
D3DXMATRIX matscaling;
D3DXMatrixIdentity(&mWorldMat);
D3DXMatrixRotationY(&matRoty,(D3DX_PI*3/2 - mAngle)+D3DX_PI);
D3DXMatrixTranslation(&matTras,mPosW.x,mPosW.y,mPosW.z);
D3DXMatrixScaling(&matscaling, mModelScaling,mModelScaling,mModelScaling);
mWorldMat=matscaling*matRoty*matTras;
After this i use a standard PhongLight shader.
The question is: The model is modelled around 0 origin in 3ds , why the pivot of rotation is a side of this 3d Arc ?
Hope someone can help me.
Thx for your time.
