/// <summary>
/// Returns a mapping tag that is used to detect when
/// a meshes colors need to be set. For details, see the
/// implementation of MappingTag and UpdateVertexColors.
/// </summary>
/// <returns></returns>
public OnMappingTag MappingTag()
{
OnMappingTag mt = new OnMappingTag();
// Since the false colors that are shown will change if
// the mesh is transformed, we have to initialize the
// transformation.
mt.m_mesh_xform.Identity();
// This is the analysis mode id passed to the
// CRhinoVisualAnalysisMode constructor. Use the
// m_am_id member and it this code will alwasy
// work correctly.
mt.m_mapping_id = m_am_id;
// This is a 32 bit CRC or the information used to
// set the false colors.
// For this example, the m_z_range and m_hue_range
// intervals control the colors, so we calculate
// their crc.
mt.m_mapping_crc = 0;
mt.m_mapping_crc = Crc32.ComputeChecksum(m_z_range);
mt.m_mapping_crc = Crc32.ComputeChecksum(m_hue_range);
return mt;
}
/// <summary>
/// Returns a mapping tag that is used to detect when
/// a meshes colors need to be set. For details, see the
/// implementation of MappingTag and UpdateVertexColors.
/// </summary>
/// <returns></returns>
public OnMappingTag MappingTag()
{
OnMappingTag mt = new OnMappingTag();
// Since the false colors that are shown will change if
// the mesh is transformed, we have to initialize the
// transformation.
mt.m_mesh_xform.Identity();
// This is the analysis mode id passed to the
// CRhinoVisualAnalysisMode constructor. Use the
// m_am_id member and it this code will alwasy
// work correctly.
mt.m_mapping_id = m_am_id;
// This is a 32 bit CRC or the information used to
// set the false colors.
// For this example, the m_z_range and m_hue_range
// intervals control the colors, so we calculate
// their crc.
mt.m_mapping_crc = 0;
mt.m_mapping_crc = Crc32.ComputeChecksum(m_z_range);
mt.m_mapping_crc = Crc32.ComputeChecksum(m_hue_range);
return(mt);
}
/// <summary>
/// MRhinoVisualAnalysisMode override
/// </summary>
public override void UpdateVertexColors(IRhinoObject obj, OnMesh[] meshes)
{
// Rhino calls this function when it is time for you
// to set the false colors on the analysis mesh vertices.
// For breps, there is one mesh per face. For mesh objects,
// there is a single mesh.
int count = meshes.Length;
if (count > 0)
{
// A "mapping tag" is used to determine if the colors need to be set
OnMappingTag mt = MappingTag();
for (int mi = 0; mi < count; mi++)
{
OnMesh mesh = meshes[mi];
if (null != mesh && 0 != mt.Compare(mesh.m_Ctag))
{
// The mesh's mapping tag is different from ours. Either
// the mesh has no false colors, has false colors set by
// another analysis mode, has false colors set using
// different m_z_range[]/m_hue_range[] values, or the
// mesh has been moved. In any case, we need to set
// the false colors to the ones we want.
int vcount = mesh.m_V.Count();
ArrayOnColor vertex_colors = mesh.m_C;
vertex_colors.SetCount(0); // in case something else had set the colors
vertex_colors.Reserve(vcount); // for efficiency
for (int vi = 0; vi < vcount; vi++)
{
double z = mesh.m_V[vi].z;
OnColor color = FalseColor(z);
vertex_colors.Append(color);
}
// set the mesh's color tag
mesh.m_Ctag = mt;
}
}
}
}