public virtual bool UpdateDraw_Ray_MultiClick(Frame3f frameW)
{
bool first = (preview.VertexCount == 0);
Vector3f vPos = Scene.ToSceneP(frameW.Origin);
// the last vertex is the one we are repositioning in UpdateDrawPreview. So, on
// click we actaully want to freeze that vertex to this position and then add a new
// temporary one. Except for the first vertex.
if (first)
{
preview.AppendVertex(vPos);
preview.AppendVertex(vPos);
OnAddedClickPoint(vPos, true);
}
else
{
// close curve if we are within close threshold
//if ( preview.VertexCount > 2 && vPos.Distance((Vector3f)preview[0]) < CloseThresholdScene )
// return false;
//preview[preview.VertexCount - 1] = vPos;
preview.AppendVertex(vPos);
OnAddedClickPoint(vPos, false);
}
return(true);
}
public virtual bool UpdateDraw_Ray_MultiClick(Ray3f ray)
{
bool first = (preview.VertexCount == 0);
SORayHit hit;
bool bHit = target.FindRayIntersection(ray, out hit);
if (bHit)
{
float offset = Scene.ToWorldDimension(SurfaceOffsetScene);
Vector3f vHit = hit.hitPos + offset * hit.hitNormal;
Vector3f vPos = Scene.ToSceneP(vHit);
// the last vertex is the one we are repositioning in UpdateDrawPreview. So, on
// click we actaully want to freeze that vertex to this position and then add a new
// temporary one. Except for the first vertex.
if (first)
{
preview.AppendVertex(vPos);
preview.AppendVertex(vPos);
OnAddedClickPoint(vPos, true);
}
else
{
// close curve if we are within close threshold
if (preview.VertexCount > 2 && vPos.Distance((Vector3f)preview[0]) < CloseThresholdScene)
{
return(false);
}
//preview[preview.VertexCount - 1] = vPos;
preview.AppendVertex(vPos);
OnAddedClickPoint(vPos, false);
}
}
return(true);
}
public void smooth_append(CurvePreview preview, Vector3f newPos, float fDistThresh)
{
// empty curve, always append
if (preview.VertexCount == 0)
{
preview.AppendVertex(newPos);
last_append_idx = preview.VertexCount - 1;
appended_last_update = true;
have_temp_append = false;
return;
}
double d = (newPos - preview[last_append_idx]).Length;
if (d < fDistThresh)
{
// have not gone far enough for a real new vertex!
Vector3f usePos = new Vector3f(newPos);
bool bValid = false;
// do we have enough vertices to do a good job?
if (preview.VertexCount > 3)
{
int nLast = (have_temp_append) ? preview.VertexCount - 2 : preview.VertexCount - 1;
Vector3d tan = preview.Tangent(nLast);
double fDot = tan.Dot((usePos - preview[nLast]).Normalized);
if (fDot > 0.9f) // cos(25) ~= 0.9f
// new vtx is aligned with tangent of last "real" vertex
{
bValid = true;
}
else
{
// not aligned, try projection onto tangent
Line3d l = new Line3d(preview[nLast], tan);
double t = l.Project(newPos);
if (t > 0)
{
// projection of new vtx is 'ahead' so we can use it
usePos = (Vector3f)l.PointAt(t);
bValid = true;
}
}
}
if (bValid)
{
if (appended_last_update)
{
preview.AppendVertex(usePos);
have_temp_append = true;
}
else if (have_temp_append)
{
preview[preview.VertexCount - 1] = usePos;
}
}
appended_last_update = false;
}
else
{
// ok we drew far enough, add this position
if (have_temp_append)
{
// re-use temp vertex
preview[preview.VertexCount - 1] = newPos;
have_temp_append = false;
}
else
{
preview.AppendVertex(newPos);
}
last_append_idx = preview.VertexCount - 1;
appended_last_update = true;
// do smoothing pass
// [TODO] cannot do this until we can reproject onto surface!!
//smoother.End = curve.VertexCount - 1;
//smoother.Start = MathUtil.Clamp(smoother.End - 5, 0, smoother.End);
//smoother.UpdateDeformation(2);
}
}