public static SphereSelector Select(Sphere sphere, Vector2 selectPos, float maxDist, bool testCenter, bool testEdge)
{
bool edge = false;
Sphere selectedSphere = null;
Vector2 center = sphere.center;
float radius = sphere.radius;
// test center selection
float centerDist = (selectPos - center).Length;
if (testCenter)
{
if (centerDist <= maxDist)
{
maxDist = centerDist;
selectedSphere = sphere;
}
}
if (testEdge && selectedSphere == null)
{
float dist = Math.Abs(centerDist - radius);
if (dist < maxDist)
{
maxDist = dist;
selectedSphere = sphere;
edge = true;
// snap edgepos to radius
Vector2 vSelectOffset = selectPos - center;
vSelectOffset = Vector2.Normalize(vSelectOffset);
vSelectOffset = vSelectOffset * radius;
selectPos = center + vSelectOffset;
}
}
if (selectedSphere != null)
{
SphereSelector selector = new SphereSelector(selectedSphere, maxDist, edge, selectPos);
return(selector);
}
return(null);
}
public bool OnSelect(Vector2 posView)
{
float touchRange = ccContext.SelectRadius;
Vector2 p = CCContext.ViewToModel(posView, ccContext.ModelViewMatrix);
float radius = CCContext.ViewToModel(touchRange, ccContext.ModelViewMatrix);
switch (activeTool)
{
case Tool.ROIEdit:
{
selectedPrim = SphereSelector.Select(roiSphere, p, radius, true, true);
if (selectedPrim != null)
{
ccContext.RequestRender();
return(true);
}
break;
}
case Tool.TagCreate:
case Tool.TagDelete:
{
selectedPrim = TagSelector.Select(tags, p, radius);
if (selectedPrim != null)
{
ccContext.RequestRender();
Console.WriteLine("selected:" + selectedPrim.GetPrimitive());
return(true);
}
break;
}
}
return(false);
}
