// This method is like a constructor (which we can't use because billboards are allocated from a pool).
// It starts/initializes a billboard. Refs used only for optimalization
public void Start(ref MyQuad quad, MyTransparentMaterialEnum materialEnum, MyTransparentMaterialEnum blendMaterial, float textureBlendRatio,
ref Vector4 color, ref Vector3 origin, Vector2 uvOffset, bool colorize = false, bool near = false, bool lowres = false)
{
MaterialEnum = materialEnum;
BlendMaterial = blendMaterial;
BlendTextureRatio = textureBlendRatio;
MyUtils.AssertIsValid(quad.Point0);
MyUtils.AssertIsValid(quad.Point1);
MyUtils.AssertIsValid(quad.Point2);
MyUtils.AssertIsValid(quad.Point3);
// Billboard vertexes
Position0 = quad.Point0;
Position1 = quad.Point1;
Position2 = quad.Point2;
Position3 = quad.Point3;
UVOffset = uvOffset;
EnableColorize = colorize;
if (EnableColorize)
{
Size = (Position0 - Position2).Length();
}
// Distance for sorting
// IMPORTANT: Must be calculated before we do color and alpha misting, because we need distance there
DistanceSquared = Vector3.DistanceSquared(MyCamera.Position, origin);
// Color
Color = color;
Near = near;
Lowres = lowres;
// Alpha depends on distance to camera. Very close bilboards are more transparent, so player won't see billboard errors or rotating billboards
var mat = MyTransparentMaterialConstants.GetMaterialProperties(MaterialEnum);
if (mat.AlphaMistingEnable)
{
Color *= MathHelper.Clamp(((float)Math.Sqrt(DistanceSquared) - mat.AlphaMistingStart) / (mat.AlphaMistingEnd - mat.AlphaMistingStart), 0, 1);
}
ContainedBillboards.Clear();
}
public void Deserialize(XmlReader reader)
{
m_name = reader.GetAttribute("name");
int version = Convert.ToInt32(reader.GetAttribute("version"));
reader.ReadStartElement(); //ParticleGeneration
foreach (IMyConstProperty property in m_properties)
{
if (reader.Name == "Emitter")
{
break; //we added new property which is not in xml yet
}
property.Deserialize(reader);
}
reader.ReadStartElement();
m_emitter.Deserialize(reader);
reader.ReadEndElement();
reader.ReadEndElement(); //ParticleGeneration
//Disable texture blending if it is set but unneccessary
if (BlendTextures)
{
bool someMaterialKeysDifferent = false;
for (int j = 0; j < Material.GetKeysCount(); j++)
{
MyAnimatedPropertyInt key;
float time;
Material.GetKey(j, out time, out key);
int previousMaterial = -1;
for (int i = 0; i < key.GetKeysCount(); i++)
{
float timeMat;
int material;
key.GetKey(i, out timeMat, out material);
if (previousMaterial != -1 && (previousMaterial != material))
{
MyTransparentMaterialProperties prevMaterialProperties = MyTransparentMaterialConstants.GetMaterialProperties((MyTransparentMaterialEnum)previousMaterial);
MyTransparentMaterialProperties materialProperties = MyTransparentMaterialConstants.GetMaterialProperties((MyTransparentMaterialEnum)material);
if (prevMaterialProperties.Texture != materialProperties.Texture)
{
someMaterialKeysDifferent = true;
break;
}
}
previousMaterial = material;
}
if (someMaterialKeysDifferent)
{
break;
}
}
if (!someMaterialKeysDifferent)
{
BlendTextures.SetValue(false);
}
}
}