private void InitialiseStyles()
{
//set sensible defaults
AmbientColour = new RgbaColour(0, 0, 0, 1);
DiffuseColour = new RgbaColour(0, 0, 0, 1);
SpecularColour = new RgbaColour(0, 0, 0, 1);
EmissiveColour = new RgbaColour(0, 0, 0, 1);
SpecularShininess = 0f;
if (_surfaceStyle != null)
{
((INotifyPropertyChanged)_surfaceStyle).PropertyChanged += SurfaceStyle_PropertyChanged;
foreach (var surfaceStyle in _surfaceStyle.Styles)
{
var shading = surfaceStyle as IIfcSurfaceStyleShading;
var rendering = surfaceStyle as IIfcSurfaceStyleRendering;
if (rendering != null)
{
AmbientColour = new RgbaColour(rendering.SurfaceColour, rendering.Transparency);
if (rendering.DiffuseColour != null)
{
var diffuseColour = rendering.DiffuseColour as IIfcColourRgb;
if (diffuseColour != null)
{
DiffuseColour = new RgbaColour(diffuseColour, rendering.Transparency);
}
else
{
DiffuseColour = AmbientColour * (IfcNormalisedRatioMeasure)rendering.DiffuseColour;
}
}
else
{
DiffuseColour = AmbientColour;
}
if (rendering.SpecularColour != null)
{
var specularColour = rendering.SpecularColour as IIfcColourRgb;
if (specularColour != null)
{
SpecularColour = new RgbaColour(specularColour, rendering.Transparency);
}
else
{
SpecularColour = AmbientColour * (IfcNormalisedRatioMeasure)rendering.SpecularColour;
}
}
if (rendering.SpecularHighlight is IfcSpecularExponent)
{
SpecularShininess = (IfcSpecularExponent)rendering.SpecularHighlight;
}
else
{
SpecularShininess = 0;
}
}
else if (shading != null)
{
AmbientColour = new RgbaColour(shading.SurfaceColour, shading.Transparency);
}
else if (surfaceStyle is IIfcSurfaceStyleLighting)
{
//TODO implement this function
}
else if (surfaceStyle is IIfcSurfaceStyleWithTextures)
{
//TODO implement this function
}
else if (surfaceStyle is IIfcExternallyDefinedSurfaceStyle)
{
//TODO implement this function
}
else if (surfaceStyle is IIfcSurfaceStyleRefraction)
{
//TODO implement this function
}
}
}
}
static RgbaColour()
{
Empty = new RgbaColour();
}