Control Of Bone

VitaliBR · 2011-01-18T22:52:48

[font="arial, sans-serif"]I'm trying to control your character's arm, and make it point to where your cursor is on the screen (so it aim the gun where the mouse)[/font] [font="arial, sans-serif"] [/font] [font="arial, sans-serif"]So:[/font] [font="arial, sans-serif"][/font]void SKINNEDMESH::UpdateMatrices(bool bones, BONE* bone, D3DXMATRIX *parentMatrix) { if(bones) { if(parentMatrix != NULL) { if(bone->Name != NULL && strcmp(bone->Name,"Bip01_L_UpperArm")==0) { D3DXMATRIX ident; D3DXMatrixIdentity(&ident); D3DXMATRIX final = bone->TransformationMatrix*(*parentMatrix); D3DXVECTOR3 boneLocation(final._41,final._42,final._43); D3DXVec3Project(&boneLocation,&boneLocation,&m_vp,&m_pm,&m_vm,&ident); // use YOUR viewport, projection and view matrices in this call D3DXVECTOR3 dir = mouseLocation - boneLocation; if(mouseLocation.x > m_Width/2) { float offset = D3DX_PI/2.0f; float angle = offset - atan2(dir.y,dir.x); // change this when you rotate the model D3DXMATRIX rot; D3DXMatrixRotationY(&rot,angle); bone->CombinedTransformationMatrix = rot*final; } else { float offset = -D3DX_PI/2.0f; float angle = offset + atan2(dir.y,dir.x); // change this when you rotate the model D3DXMATRIX rot; D3DXMatrixRotationY(&rot,angle); bone->CombinedTransformationMatrix = rot*final; } } else { D3DXMatrixMultiply(&bone->CombinedTransformationMatrix, &bone->TransformationMatrix, parentMatrix); } } else bone->CombinedTransformationMatrix = bone->TransformationMatrix; if(bone->pFrameSibling) { UpdateMatrices(bones, (BONE*)bone->pFrameSibling, parentMatrix); } if(bone->pFrameFirstChild) { UpdateMatrices(bones, (BONE*)bone->pFrameFirstChild, &bone->CombinedTransformationMatrix); } } else { if(bone != NULL) D3DXMatrixMultiply(&bone->CombinedTransformationMatrix, &bone->TransformationMatrix, parentMatrix); else bone->CombinedTransformationMatrix = bone->TransformationMatrix; if(bone->pFrameSibling) UpdateMatrices(bones, (BONE*)bone->pFrameSibling, parentMatrix); if(bone->pFrameFirstChild) UpdateMatrices(bones, (BONE*)bone->pFrameFirstChild, &bone->CombinedTransformationMatrix); }} [font="arial, sans-serif"] [/font] [font="arial, sans-serif"]But he does not move properly in the direction that the mouse cursor is, why?[/font] [font="arial, sans-serif"]as, I move the mouse, it moves very little, but in reverse (back)[/font] [font="arial, sans-serif"] [/font] [font="arial, sans-serif"]Thanks[/font] [font="arial, sans-serif"] [/font] [font="arial, sans-serif"]I'm sending a video to youtube with my problem, wait [/font]

Graphics and GPU Programming Programming

Started by VitaliBR January 09, 2011 06:41 PM

37 comments, last by VitaliBR 13 years, 3 months ago

VitaliBR

147

Author

January 18, 2011 06:33 PM

[font=arial, sans-serif]Thanks guy, Now it works

[font=arial, sans-serif]

[font=arial, sans-serif]just something weird is happening

[font=arial, sans-serif]when the cursor approaches the player, the arm moves strangely, see:
[font=arial, sans-serif][media]

[/media]

http://mateusvitali.wordpress.com/

Buckeye

10,754

January 18, 2011 06:55 PM

Whew! Glad you have it at least partially working. But it's obviously not working correctly. I'm guessing that:

1. You're not calculating the angle between the bone location and mouse location correctly.
or
2. The mouse or bone location coordinates haven't been correctly converted to client coordinates.

Are you sure you're converting the mouse point to client coordinates correctly?

Are you using exactly the same world matrix in the D3DXVec3Project call that you use to render the object?

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.

VitaliBR

147

Author

January 18, 2011 08:09 PM

Whew! Glad you have it at least partially working

Are you sure you're converting the mouse point to client coordinates correctly?

[font="arial, sans-serif"]I think so,

	GetCursorPos(&absCursor);

	ScreenToClient(wndHandle,&absCursor);

	D3DXVECTOR3 mouseLocation((float)absCursor.x,(float)absCursor.y,0);

	player->mouselocal(mouseLocation, WIDTH, pm, vm,vp);

void mouselocal(D3DXVECTOR3 pos_of_Mouse, int Width, D3DXMATRIX pm, D3DXMATRIX vm, D3DVIEWPORT9 vp);

Are you using exactly the same world matrix in the D3DXVec3Project call that you use to render the object?

Yes,
[font="arial, sans-serif"]I'm using the matrix matWorld [font="arial, sans-serif"]used to render the mesh
[font="arial, sans-serif"]look:
[font="arial, sans-serif"][font="arial, sans-serif"]

class SKINNEDMESH

{

public:

    SKINNEDMESH();

    ~SKINNEDMESH();

    //...

    //...



private:

    //...

    //...



    // Setup world matrix

    D3DXMATRIXA16 matWorld,matWorld2;



    //...

    //...

};

[font="arial, sans-serif"]

	//...

	//...

	D3DXMatrixTranslation( &matWorld2, vPos.x, vPos.y,vPos.z );



	D3DXMatrixMultiply(&matWorld,&matWorld,&matWorld2);



	m_pDevice->SetTransform( D3DTS_WORLD, &matWorld );



	//If there is a mesh to render...

	if(bone->pMeshContainer != NULL)

	{	    

	BONEMESH *boneMesh = (BONEMESH*)bone->pMeshContainer;

	//...

	//...

[font="arial, sans-serif"]

	D3DXMATRIX final = bone->TransformationMatrix*(*parentMatrix);

	D3DXVECTOR3 boneLocation(final._41,final._42,final._43);

	D3DXVec3Project(&boneLocation,&boneLocation,&m_vp,&m_pm,&m_vm,&matWorld);

http://mateusvitali.wordpress.com/

Buckeye

10,754

January 18, 2011 08:38 PM



player->mouselocal(mouseLocation, WIDTH, pm, vm, vp);

I don't know what that function does, but you don't need to do anything with mouseLocation after you convert it to client coordinates!

Comment out that line and try it.

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.

VitaliBR

147

Author

January 18, 2011 09:05 PM

player->mouselocal(mouseLocation, WIDTH, pm, vm, vp);
I don't know what that function does, but you don't need to do anything with mouseLocation after you convert it to client coordinates!

Comment out that line and try it.

[font="arial, sans-serif"]This line just gets the parameters and saves the class variables
[font="arial, sans-serif"]

void SKINNEDMESH::mouselocal(D3DXVECTOR3 pos, int Width, D3DXMATRIX pm, D3DXMATRIX vm, D3DVIEWPORT9 vp)

{

	mouseLocation = pos;

	m_Width = Width;

	m_pm = pm;

	m_vm = vm;

	m_vp = vp;

}

http://mateusvitali.wordpress.com/

Buckeye

10,754

January 18, 2011 09:21 PM

Ah! Okay. It appears it shouldn't be commented out!

Reviewing some of the logged data you posted above, you might try logging the same information when the mouse pointer is directly on top (or very close to) the bone location. The intent of using D3DXVec3Project is to get the bone location and the mouse location both in client coordinates.

When the mouse pointer is very close to the bone location, the bone location X and Y coordinates should be almost the same as the mouse location - within a few pixels. I think you logged that data before you changed D3DXVec3Project to use the correct world matrix.

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.

VitaliBR

147

Author

January 18, 2011 10:09 PM

[font=arial, sans-serif]I solved the problem just by commenting out the line ScreenToClient (wndHandle, &absCursor);

[font=arial, sans-serif]This working 100% now, thanks for the help buckeye

http://mateusvitali.wordpress.com/

Buckeye

10,754

January 18, 2011 10:29 PM