// Given a set of coordinates in local creature space,
// see if any bone is in contact
public string IsContactBone(XnaGeometry.Vector2 pt_in,
float radius)
{
MeshBoneUtil.MeshBone cur_bone = target_creature.render_composition.getRootBone();
return ProcessContactBone(pt_in, radius, cur_bone);
}
public string ProcessContactBone(XnaGeometry.Vector2 pt_in,
float radius,
MeshBoneUtil.MeshBone bone_in)
{
string ret_name = "";
XnaGeometry.Vector4 diff_vec = bone_in.getWorldEndPt() - bone_in.getWorldStartPt();
XnaGeometry.Vector2 cur_vec = new XnaGeometry.Vector2(diff_vec.X, diff_vec.Y);
float cur_length = (float)cur_vec.Length();
XnaGeometry.Vector2 unit_vec = cur_vec;
unit_vec.Normalize();
XnaGeometry.Vector2 norm_vec = new XnaGeometry.Vector2(unit_vec.Y, unit_vec.X);
XnaGeometry.Vector2 src_pt = new XnaGeometry.Vector2(bone_in.getWorldStartPt().X, bone_in.getWorldStartPt().Y);
XnaGeometry.Vector2 rel_vec = pt_in - src_pt;
float proj = (float)XnaGeometry.Vector2.Dot(rel_vec, unit_vec);
if( (proj >= 0) && (proj <= cur_length))
{
float norm_proj = (float)XnaGeometry.Vector2.Dot(rel_vec, norm_vec);
if(norm_proj <= radius)
{
return bone_in.getKey();
}
}
List<MeshBone> cur_children = bone_in.getChildren();
foreach(MeshBone cur_child in cur_children)
{
ret_name = ProcessContactBone(pt_in, radius, cur_child);
if(!(ret_name.Equals(""))) {
break;
}
}
return ret_name;
}
public CreatureUVSwapPacket(XnaGeometry.Vector2 local_offset_in,
XnaGeometry.Vector2 global_offset_in,
XnaGeometry.Vector2 scale_in,
int tag_in)
{
local_offset = local_offset_in;
global_offset = global_offset_in;
scale = scale_in;
tag = tag_in;
}