private void WriteGeometry(JsonWriter writer)
{
XbimMatrix3D globalTrans = GetGlobalModelTransform();
//write out the material nodes and then the instances for each material
Dictionary <int, XbimTexture> styles = _context.SurfaceStyles().ToDictionary(s => s.DefinedObjectId);
foreach (var instanceGroup in _context.ShapeInstancesGroupByStyle())
{
if (!instanceGroup.Any())
{
continue; //skip emmpty instances;
}
int styleId = instanceGroup.Key;
XbimTexture style = styles[styleId];
writer.WriteStartObject(); //Material node
{
writer.WritePropertyName("type"); writer.WriteValue("material");
writer.WritePropertyName("id"); writer.WriteValue("M" + styleId);
writer.WritePropertyName("color");
writer.WriteStartObject(); //begin color
{
writer.WritePropertyName("r"); writer.WriteValue(style.ColourMap[0].Red);
writer.WritePropertyName("g"); writer.WriteValue(style.ColourMap[0].Green);
writer.WritePropertyName("b"); writer.WriteValue(style.ColourMap[0].Blue);
} writer.WriteEndObject(); //end color
writer.WritePropertyName("alpha"); writer.WriteValue(style.ColourMap[0].Alpha);
//all instances of this style
writer.WritePropertyName("nodes"); //beginning of the instance nodes
writer.WriteStartArray();
foreach (var shapeInstance in instanceGroup)
{
writer.WriteStartObject(); //start of instance transform
{
if (_maps.Contains(shapeInstance.ShapeGeometryLabel)) //it is a reference
{
//write the transform
writer.WritePropertyName("type"); //geometry node
writer.WriteValue("matrix");
writer.WritePropertyName("id");
writer.WriteValue("I" + shapeInstance.InstanceLabel);
writer.WritePropertyName("elements");
XbimMatrix3D m = XbimMatrix3D.Multiply(shapeInstance.Transformation, globalTrans);
WriteMatrix(writer, m);
writer.WritePropertyName("nodes"); //beginning of the instance nodes
writer.WriteStartArray();
//write the map
writer.WriteStartObject(); //start of map
{
writer.WritePropertyName("type"); //geometry node
writer.WriteValue("geometry");
writer.WritePropertyName("coreId");
writer.WriteValue("L" + shapeInstance.ShapeGeometryLabel);
} writer.WriteEndObject(); //end of map
writer.WriteEndArray(); //end of instance tranform nodes
}
else //write the actual geometry
{
writer.WritePropertyName("type"); //geometry node
writer.WriteValue("geometry");
writer.WritePropertyName("primitive"); //primitive: "
writer.WriteValue("triangles");
writer.WritePropertyName("id");
writer.WriteValue("I" + shapeInstance.InstanceLabel);
WriteShapeGeometry(writer, _context.ShapeGeometry(shapeInstance), XbimMatrix3D.Multiply(shapeInstance.Transformation, globalTrans));
}
} writer.WriteEndObject(); //end of instance transform
}
writer.WriteEndArray(); //end of instance transform nodes
} writer.WriteEndObject(); // end of the material node
}
}