Moving the mouse to WoW coordinates

[shomoiog]

For the coppypasta happy people, Kynox's 3d to 2d projection made easy. For the real implementation, keep just the comments, for the easy copy/paste one, keep it as it is. 3.0.8 compatible ofc. No need to blindly hoover around the screen searching for stuff anymore. Works out of process for easy testing, returns false when the mouse can be moved there (behind the camera, etc).

/////////////////////

#define WOW_CAMERA_PTR1		0x10A5DAC
#define WOW_CAMERA_OFFSET	0x000782C
#define M_DEG2RAD		0.01745329251f

struct SCameraInfo
{
	DWORD	dwFoo1[2];
	//CVec3 vPos;
	float	fPos[3];
	//CMat3 matView;
	float	fViewMat[3][3];
	DWORD	dwFoo2[2];
	float	fFov;
};

BOOL MoveMouseToWoWCoords( float x, float y, float z /* CVec3 vWoWPos*/, HWND hwndWoW, HANDLE hWoWProc )
{
	SCameraInfo camera;
	LPBYTE	pAddr1;
	LPBYTE	pAddr2;
	DWORD	dwFoo;

	if( !ReadProcessMemory( hWoWProc, (LPDWORD)WOW_CAMERA_PTR1, &pAddr1, 4, &dwFoo ) || dwFoo != 4 )
		return FALSE;
	if( !ReadProcessMemory( hWoWProc, pAddr1+WOW_CAMERA_OFFSET, &pAddr2, 4, &dwFoo ) || dwFoo != 4 )
		return FALSE;
	if( !ReadProcessMemory( hWoWProc, pAddr2, &camera, sizeof(SCameraInfo), &dwFoo ) || dwFoo != sizeof(SCameraInfo) )
		return FALSE;

	RECT rc;
	if( !::GetClientRect( hwndWoW,&rc ) )
		return FALSE;

	//CVec3 vDiff = vWoWPos - camera.vPos;
	float fDiff[3];
	fDiff[0] = x-camera.fPos[0];
	fDiff[1] = y-camera.fPos[1];
	fDiff[2] = z-camera.fPos[2];

	//float fProd = vDiff*camera.matView[0];
	float fProd = 
		fDiff[0]*camera.fViewMat[0][0] +
		fDiff[1]*camera.fViewMat[0][1] +
		fDiff[2]*camera.fViewMat[0][2];
	if( fProd < 0 )
		return FALSE;

	//CVec3 vView = vDiff*!camera.matView;
	float fInv[3][3];
	fInv[0][0] = camera.fViewMat[1][1]*camera.fViewMat[2][2]-camera.fViewMat[1][2]*camera.fViewMat[2][1];
	fInv[1][0] = camera.fViewMat[1][2]*camera.fViewMat[2][0]-camera.fViewMat[1][0]*camera.fViewMat[2][2];
	fInv[2][0] = camera.fViewMat[1][0]*camera.fViewMat[2][1]-camera.fViewMat[1][1]*camera.fViewMat[2][0];
	float fDet = camera.fViewMat[0][0]*fInv[0][0]+camera.fViewMat[0][1]*fInv[1][0]+camera.fViewMat[0][2]*fInv[2][0];
	float fInvDet = 1.0f / fDet;
	fInv[0][1] = camera.fViewMat[0][2]*camera.fViewMat[2][1]-camera.fViewMat[0][1]*camera.fViewMat[2][2];
	fInv[0][2] = camera.fViewMat[0][1]*camera.fViewMat[1][2]-camera.fViewMat[0][2]*camera.fViewMat[1][1];
	fInv[1][1] = camera.fViewMat[0][0]*camera.fViewMat[2][2]-camera.fViewMat[0][2]*camera.fViewMat[2][0];
	fInv[1][2] = camera.fViewMat[0][2]*camera.fViewMat[1][0]-camera.fViewMat[0][0]*camera.fViewMat[1][2];
	fInv[2][1] = camera.fViewMat[0][1]*camera.fViewMat[2][0]-camera.fViewMat[0][0]*camera.fViewMat[2][1];
	fInv[2][2] = camera.fViewMat[0][0]*camera.fViewMat[1][1]-camera.fViewMat[0][1]*camera.fViewMat[1][0];
	camera.fViewMat[0][0] = fInv[0][0]*fInvDet;
	camera.fViewMat[0][1] = fInv[0][1]*fInvDet;
	camera.fViewMat[0][2] = fInv[0][2]*fInvDet;
	camera.fViewMat[1][0] = fInv[1][0]*fInvDet;
	camera.fViewMat[1][1] = fInv[1][1]*fInvDet;
	camera.fViewMat[1][2] = fInv[1][2]*fInvDet;
	camera.fViewMat[2][0] = fInv[2][0]*fInvDet;
	camera.fViewMat[2][1] = fInv[2][1]*fInvDet;
	camera.fViewMat[2][2] = fInv[2][2]*fInvDet;
	float fView[3];
	fView[0] = fInv[0][0]*fDiff[0]+fInv[1][0]*fDiff[1]+fInv[2][0]*fDiff[2];
	fView[1] = fInv[0][1]*fDiff[0]+fInv[1][1]*fDiff[1]+fInv[2][1]*fDiff[2];
	fView[2] = fInv[0][2]*fDiff[0]+fInv[1][2]*fDiff[1]+fInv[2][2]*fDiff[2];

	//CVec3 vCam( -vView.fY,-vView.fZ,vView.fX );
	float fCam[3];
	fCam[0] = -fView[1];
	fCam[1] = -fView[2];
	fCam[2] =  fView[0];

	float    fScreenX = (rc.right-rc.left)/2.0f;
	float    fScreenY = (rc.bottom-rc.top)/2.0f;
	// Thanks pat0! Aspect ratio fix
	float    fTmpX    = fScreenX/tan(((camera.fFov*44.0f)/2.0f)*M_DEG2RAD);
	float    fTmpY    = fScreenY/tan(((camera.fFov*35.0f)/2.0f)*M_DEG2RAD);

	POINT pctMouse;
	//pctMouse.x = fScreenX + vCam.fX*fTmpX/vCam.fZ;
	pctMouse.x = fScreenX + fCam[0]*fTmpX/fCam[2];
	//pctMouse.y = fScreenY + vCam.fY*fTmpY/vCam.fZ;
	pctMouse.y = fScreenY + fCam[1]*fTmpY/fCam[2];

	if( pctMouse.x < 0 || pctMouse.y < 0 || pctMouse.x > rc.right || pctMouse.y > rc.bottom )
		return FALSE;

	if( !::ClientToScreen(hwndWoW,&pctMouse) )
		return FALSE;
	if( !::SetCursorPos(pctMouse.x,pctMouse.y) )
		return FALSE;

	return TRUE;
}

///////////////////////////////////////


0x004B4B20 -> GetCamera()

[SKU]

Yay linear algebra. +2rep

[Cursed]

Gj, contributing + giving credits = 3x +Rep

[jbrauman]

Awesome, shouldn't be too hard to convert into any language.
Edit: Actually having a bit of trouble converting to C# seems I've never worked in C++ before, if anyone has done that already can they whizz me a PM? Thanks.

[RiseAndShine]

Big thx! It would probably take me days of hard thinking to figure this out (if at all ^^).

C#

NoMorePasting.com

Did make a few changes, added +25 Pixels to Y, cause somehow Y-Position is always off a little for me. Also, X-Position is always where Y should be in Memory and vice versa, so I swapped them.

[jbrauman]

Big thx! It would probably take me days of hard thinking to figure this out (if at all ^^).

C#

NoMorePasting.com

Did make a few changes, added +25 Pixels to Y, cause somehow Y-Position is always off a little for me. Also, X-Position is always where Y should be in Memory and vice versa, so I swapped them.

Awesome. However I'm doing it the hackish way now and just injecting and doing Interact to it.

[g3gg0]

Did make a few changes, added +25 Pixels to Y, cause somehow Y-Position is always off a little for me. Also, X-Position is always where Y should be in Memory and vice versa, so I swapped them.

25 pixels off?
you are running WoW in windowed mode?

but something different:
do you also see that the positions are little off when the object is in the corner of the window?
i have this with any implementation

[naa]

Big thx! It would probably take me days of hard thinking to figure this out (if at all ^^).

C#

NoMorePasting.com

Did make a few changes, added +25 Pixels to Y, cause somehow Y-Position is always off a little for me. Also, X-Position is always where Y should be in Memory and vice versa, so I swapped them.

Thank you.
+Rep

[RiseAndShine]

Awesome. However I'm doing it the hackish way now and just injecting and doing Interact to it.

Call me paranoid, but I try to avoid injecting as much as possible ^^
So what I do is first try to click on an object, if that fails I use interact (and if that fails I use interact again, because sometimes it doesn't work the first time).
Also yeah, I'm running window mode, that probably explains why it's some pixels off.

[jbrauman]

Call me paranoid, but I try to avoid injecting as much as possible ^^
So what I do is first try to click on an object, if that fails I use interact (and if that fails I use interact again, because sometimes it doesn't work the first time).
Also yeah, I'm running window mode, that probably explains why it's some pixels off.

I was trying to not do injecting too but.. it's so awesome. Can't help myself.

[naa]

Anyone got the new offsets for 3.0.9? or know how to find them?

[g3gg0]

cameraPointer = 0x010A6DAC;
cameraOffset = 0x000782C;

[naa]

cameraPointer = 0x010A6DAC;
cameraOffset = 0x000782C;

Thank you +Rep

[xLeo123]

The float x,y co-ords that are passed onto the function, are they relative to anything? how do the specified co-ordinates translate to on-screen co-ords? thanks.

E.G: My character is at 48.5,30.6,5.1 XYZ co-ords, and I wanted to click an object at 48.7,30.1,5.2 XYZ, what would the params be on the function?
0.2f,0.5f,0.1f?

[corderoy]

they are relative to the centre of the Azeroth

You should pass 48.7f,30.1f,5.2f