Hi all
Directx9 c++
I have exhausted all possibilities of to this solution to solve it but i can not. Im simply trying to detect if the mouse has clicked on an object. The entire pick code is shown below:
HRESULT Engine::Pick(LPDIRECT3DDEVICE9 g_pd3dDevice)
{
HRESULT hr;
D3DXVECTOR3 vPickRayDir;
D3DXVECTOR3 vPickRayOrig;
D3DXMATRIX m_inv, ma;
D3DXVECTOR3 v1_tr, v2_tr;
D3DXVECTOR3 vLocalRayOrig;
D3DXVECTOR3 vLocalRayDir;
D3DXVECTOR3 rayObjOrigin,rayObjDirection;
// Get the pick ray from the mouse position
if( GetCapture() )
{
D3DVIEWPORT9 m_mainViewport;
g_pd3dDevice->GetViewport( &m_mainViewport );
D3DXMATRIX matProj;
g_pd3dDevice->GetTransform( D3DTS_PROJECTION, &matProj );
POINT ptCursor;
GetCursorPos( &ptCursor );
ScreenToClient( h_Wnd, &ptCursor );
// Compute the vector of the pick ray in screen space
D3DXVECTOR3 v;
v.x = ( ( ( 2.0f * ptCursor.x ) / m_mainViewport.Width ) - 1 ) / matProj._11;
v.y = -( ( ( 2.0f * ptCursor.y ) / m_mainViewport.Height ) - 1 ) / matProj._22;
v.z = 1.0f;
D3DXMATRIX matView, m, WorldMatrix, inv_WorldMatrix, matWorldView;
D3DXVECTOR3 rayOrigin,rayDir;
g_pd3dDevice->GetTransform( D3DTS_VIEW, &matView );
D3DXMatrixInverse( &m, NULL, &matView );
// Transform the screen space pick ray into 3D space
rayDir.x = v.x*m._11 + v.y*m._21 + v.z*m._31;
rayDir.y = v.x*m._12 + v.y*m._22 + v.z*m._32;
rayDir.z = v.x*m._13 + v.y*m._23 + v.z*m._33;
rayOrigin.x = m._41;
rayOrigin.y = m._42;
rayOrigin.z = m._43;
// Use inverse of matrix
D3DXMATRIX matInverse, matWorld;
g_pd3dDevice->GetTransform( D3DTS_WORLD, &matWorld );
D3DXMatrixInverse(&matInverse,NULL,&matWorld);
D3DXVec3TransformCoord(&rayObjOrigin,&rayOrigin,&matInverse);
D3DXVec3TransformNormal(&rayObjDirection,&rayDir,&matInverse);
D3DXVec3Normalize(&rayObjDirection,&rayObjDirection);
LPD3DXBASEMESH pMesh = pDial[0].pModel->GetMesh();
BOOL bHit;
FLOAT fDist;
D3DXIntersect(pMesh, &rayObjOrigin, &rayObjDirection, &bHit, NULL, NULL, NULL, &fDist,
NULL, NULL);
if( bHit )
{
int test = 6;
}
}
return S_OK;
}
Pick is called in the render method, does it matter where it is called from? e.g HRESULT hr = Pick(g_pd3dDevice);
ALso should the matrix for matView and world etc be specific to each mesh or is it in general termsn from the device? e.g g_pd3dDevice->GetTransform( D3DTS_WORLD, &matWorld );
The meshes themselves are created in a mesh class and controlled by another class. In this class the meshes are positioned via.
void Slider::Render(LPDIRECT3DDEVICE9 g_pd3dDevice)
{
D3DXMATRIXA16 matWorld, matMove;
D3DXMatrixTranslation(&matMove, getPosition().x, getPosition().y, getPosition().z);
D3DXMatrixRotationY( &matWorld, getRotation().y);
D3DXMatrixMultiply(&matWorld, &matWorld, &matMove);
g_pd3dDevice->SetTransform( D3DTS_WORLD, &matWorld );
pModel->Render(g_pd3dDevice);
}
Sorry for waffling but i just want to make sure ive given enough information for some help because i am COMPLETELY stuck.
Thank you
Stuart
EDIT: Please remember to use [sou
rce] and [co
de] tags...
[Edited by - jollyjeffers on May 21, 2006 2:02:34 PM]
