public float UpdateHeight(ModelEngine engine)
{
Matrix4x4 w2c_tm = engine.camera.worldToCameraMatrix;
Vector3 [] vThirdDirs = { w2c_tm.GetRow(0), w2c_tm.GetRow(1) };
int nThirdIdx = 0;
float fDotNearestZero = 1.0f;
for (int i = 0; i < vThirdDirs.Length; ++i)
{
float fDot = Vector3.Dot(floorPlane_.normal, vThirdDirs[i]);
if (Mathf.Abs(fDot) < fDotNearestZero)
{
fDotNearestZero = fDot;
nThirdIdx = i;
}
}
Vector3 v0 = pivot_;
Vector3 v1 = pivot_ + floorPlane_.normal;
Vector2 v2 = pivot_ + vThirdDirs [nThirdIdx];
helperPlane_ = new Plane(v0, v1, v2);
Ray ray = engine.ViewRay();
float t;
if (helperPlane_.Raycast(ray, out t))
{
return(floorPlane_.GetDistanceToPoint(ray.origin + ray.direction * t));
}
return(0);
}
public override void OnMouseDrag(ModelEngine engine)
{
if (phase_ == E4Phases.DrawBase)
{
float t;
Ray ray = engine.ViewRay();
if (plane_.Raycast(ray, out t))
{
base_[1] = cursor_ = ray.origin + ray.direction * t;
}
UpdateModel();
}
}