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 11, 2011 06:23 PM

For instance, I don't know what player->mouselocal(...) does.

the player->mouselocal(...) [font="arial, sans-serif"]given parameters such as viewport, etc...
[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;}

[font="arial, sans-serif"]

Also, you're still rotating the arm about the Y axis. Did you determine that's the correct axis to rotate about?[font="arial, sans-serif"]

[font="arial, sans-serif"]Yes, I tested the three axis and the axis is correct to rotate the Y
[font="arial, sans-serif"]

[font="arial, sans-serif"][font="arial, verdana, tahoma, sans-serif"]

[font="arial, sans-serif"][font="arial, verdana, tahoma, sans-serif"]I would suggest, for clarity:</blockquote><br /> [font="arial, sans-serif"][font="arial, verdana, tahoma, sans-serif"][font="arial, sans-serif"]I need to study a way of passing 'the handle' for my class, so I can use theScreenToClient

http://mateusvitali.wordpress.com/

Buckeye

10,754

January 11, 2011 06:40 PM

Your "mouselocal" function doesn't convert from screen to client coordinates. I would suspect that's part of the problem. If you're going to calculate angles using mouse and bone locations, both vectors need to be in the same "space."

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 11, 2011 09:20 PM

Your "mouselocal" function doesn't convert from screen to client coordinates. I would suspect that's part of the problem. If you're going to calculate angles using mouse and bone locations, both vectors need to be in the same "space."

There is no function where I can "get" the handle? such as I "get" the viewport:



	D3DVIEWPORT9 vp; //viewport



	m_pDevice->GetViewport(&vp);

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Buckeye

10,754

January 11, 2011 10:30 PM

There is no function where I can "get" the handle? such as I "get" the viewport:
D3DVIEWPORT9 vp; //viewport m_pDevice->GetViewport(&vp);

When you setup your device present parameters, don't you use a window handle?

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 11, 2011 10:42 PM

When you setup your device present parameters, don't you use a window handle?

[font="arial, sans-serif"]Yes, I use, but i use ScreenManager, and in class I'm using is derived from this abstract class:
[font="arial, sans-serif"]

class IGameScreen

{

public:

    IGameScreen() { }

    ~IGameScreen() { }



    virtual bool Initialize(IDirect3DDevice9 *pDevice) = 0;

    virtual void Unload() = 0;



    virtual void Update() = 0;

    virtual void Draw() = 0;

};

[font="arial, sans-serif"]
[font="arial, sans-serif"]And I would be very complicated to have to go through the handler parameter in allclasses of the management screens

[font="arial, sans-serif"]If there was a function to get the handler, would be much easier
[font="arial, sans-serif"]
[font="arial, sans-serif"]
[font="arial, sans-serif"]EDIT:
[font="arial, sans-serif"]This function does exactly what?
[font="arial, sans-serif"]http://msdn.microsoft.com/en-us/library/aa344214(v=vs.85).aspx

http://mateusvitali.wordpress.com/

Buckeye

10,754

January 12, 2011 12:47 AM

[font="arial, sans-serif"]Yes, I use, but i use ScreenManager
<snippet removed>
[font="arial, sans-serif"]EDIT:
[font="arial, sans-serif"]This function does exactly what?
[font="arial, sans-serif"]http://msdn.microsof...4(v=vs.85).aspx

Sounds like you should be using an interface that helps you rather than hinders you. So why not change the interface to do what you want it to do? E.g., add a GetWindowHandle function to the interface.

Re: The GetHandle function - it apparently has something to do with transactions.

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 12, 2011 03:16 AM

[font="arial, sans-serif"]I modified my class and now I'm doing this:
[font="arial, sans-serif"]

GetCursorPos(&absCursor);

ScreenToClient(hWnd,&absCursor); // hWnd = the handle to your DirectX window

D3DXVECTOR3 mouseLocation( absCursor.x, absCursor.y, 0 ); // mouse in client coordinates

[font="arial, sans-serif"]
[font="arial, sans-serif"]The hand is straight and now moves toward the table as the mouse moves, but is moving very little

http://mateusvitali.wordpress.com/

Buckeye

10,754

January 12, 2011 03:41 AM

You haven't described how you determined that the Y axis is the correct axis to rotate about. If the local Y axis of the bone doesn't transform to the axis that points in/out of the screen, it won't work correctly.

There're a couple things you can do. I suggest that, first, you confirm you have the right axis by rotating the arm continuously to see if that works. Something like:



static float angle = 0;

if( bone != NULL && ... )

{

   angle += 0.01f;

   D3DXMATRIX rot;

   D3DXMatrixRotationY(&rot,angle);

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

   bone->CombinedTransformationMatrix = rot * final;

   // etc.

}

That should cause the arm to rotate continuously, assuming you're updating and rendering continuously.

If that works, output some data from the routine you posted in post #9 above to your debug output window - things like mouse location, bone location, angle, etc., and see if the values are correct as you move the mouse.

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 12, 2011 11:01 PM

[font="arial, sans-serif"]Just anticipating some results, I took the test asyou said in the Y axis:
[font="arial, sans-serif"]

			static float angle = 0;

            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



                float offset = D3DX_PI/2.0f;

                angle += 0.1;

                D3DXMATRIX rot;

                D3DXMatrixRotationY(&rot,angle);

                bone->CombinedTransformationMatrix = rot*final;

}

[font="arial, sans-serif"]
[font="arial, sans-serif"]See how it:
[font="arial, sans-serif"]http://www.youtube.c...h?v=t_3-hRqhSus

http://mateusvitali.wordpress.com/

Buckeye

10,754

January 13, 2011 02:36 AM

Good job. It appears that the bone's local Y axis is pointing out of the screen - the rotation is clockwise with increasing angle.

For the model, what do you set for the world transform when you render it? The equations you're using assume the model is rendered with an identity world matrix. You need to use the same world matrix for D3DXVec3Project as you do when you render it, to ensure that the projected bone location is in screen space with the mouse location.

I.e., if you render the model something like:



dev->SetTransform(D3DTS_WORLD, &modelWorld);

// draw the model

then you need to use the same modelWorld in the D3DXVec3Project call:



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

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.

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