protected override void UpdateVertexColors(Rhino.DocObjects.RhinoObject obj, Mesh[] meshes)
{
// A "mapping tag" is used to determine if the colors need to be set
Rhino.Render.MappingTag mt = GetMappingTag(obj.RuntimeSerialNumber);
for (int mi = 0; mi < meshes.Length; mi++)
{
var mesh = meshes[mi];
if (mesh.VertexColors.Tag.Id != this.Id)
{
// 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.
System.Drawing.Color[] colors = new System.Drawing.Color[mesh.Vertices.Count];
for (int i = 0; i < mesh.Vertices.Count; i++)
{
double z = mesh.Vertices[i].Z;
colors[i] = FalseColor(z);
}
mesh.VertexColors.SetColors(colors);
// set the mesh's color tag
mesh.VertexColors.Tag = mt;
}
}
}
/// <summary>
/// Returns a mapping tag that is used to detect when a mesh's colors need to
/// be set.
/// </summary>
/// <returns></returns>
Rhino.Render.MappingTag GetMappingTag(uint serialNumber)
{
Rhino.Render.MappingTag mt = new Rhino.Render.MappingTag();
mt.Id = this.Id;
// Since the false colors that are shown will change if the mesh is
// transformed, we have to initialize the transformation.
mt.MeshTransform = Transform.Identity;
// 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.
uint crc = RhinoMath.CRC32(serialNumber, m_z_range.T0);
crc = RhinoMath.CRC32(crc, m_z_range.T1);
crc = RhinoMath.CRC32(crc, m_hue_range.T0);
crc = RhinoMath.CRC32(crc, m_hue_range.T1);
mt.MappingCRC = crc;
return(mt);
}
/// <summary>
/// Returns a mapping tag that is used to detect when a mesh's colors need to
/// be set.
/// </summary>
/// <returns></returns>
Rhino.Render.MappingTag GetMappingTag(uint serialNumber)
{
Rhino.Render.MappingTag mt = new Rhino.Render.MappingTag();
mt.Id = this.Id;
// Since the false colors that are shown will change if the mesh is
// transformed, we have to initialize the transformation.
mt.MeshTransform = Transform.Identity;
// 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.
uint crc = RhinoMath.CRC32(serialNumber, m_z_range.T0);
crc = RhinoMath.CRC32(crc, m_z_range.T1);
crc = RhinoMath.CRC32(crc, m_hue_range.T0);
crc = RhinoMath.CRC32(crc, m_hue_range.T1);
mt.MappingCRC = crc;
return mt;
}
