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be17_17y

Standing on mesh ???

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be17_17y    128
if i use mesh from .x file to create my terrain or building, how i can i get the x,y,z value on the mesh surface in the point I get clicked with mouse so i can use my character to walk/stand on it ?

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AhmedSaleh    190
Hi,

You Can use the D3DX Function D3DXIntersect(); which returns a boolean value if u hit a mesh or not(ray to plane intersection test) , you can use that too to test for the value of the height below and above you, with some basic math .

float GetTheHeightBelowYou(float XPos, float YPos, float ZPos)
{
BOOL Hit;
float u, v, Dist;
DWORD FaceIndex;

D3DXIntersect(meshprt,
&D3DXVECTOR3(XPos,YPos,ZPos),// ray
&D3DXVECTOR3(0.0f, -1.0f, 0.0f), // ray's direction
&Hit, &FaceIndex, &u, &v, &Dist);
if(Hit == TRUE)
return YPos-Dist;
return YPos;
}

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