/// <summary>
///
/// </summary>
/// <param name="group"></param>
/// <param name="entity"></param>
/// <returns></returns>
public static ImpostorTexture GetTexture(ImpostorPage group, Entity entity)
{
//Search for an existing impostor texture for the given entity
string entityKey = ImpostorBatch.GenerateEntityKey(entity);
ImpostorTexture texture = null;
if (!mSelfList.TryGetValue(entityKey, out texture))
{
if (group != null)
{
texture = new ImpostorTexture(group, entity);
}
}
return(texture);
}
/// <summary>
///
/// </summary>
/// <param name="group"></param>
/// <param name="entity"></param>
protected ImpostorTexture(ImpostorPage group, Entity entity)
{
//Store scene manager and entity
mSceneMgr = group.SceneManager;
mEntity = entity;
//Add self to list of ImpostorTexture's
mEntityKey = ImpostorBatch.GenerateEntityKey(entity);
mSelfList.Add(mEntityKey, this);
//Calculate the entity's bounding box and it's diameter
mBoundingBox = entity.BoundingBox;
//Note - this radius calculation assumes the object is somewhat rounded (like trees/rocks/etc.)
float tmp = 0;
mEntityRadius = mBoundingBox.Maximum.x - mBoundingBox.Center.x;
tmp = mBoundingBox.Maximum.y - mBoundingBox.Center.y;
if (tmp > mEntityRadius)
{
mEntityRadius = tmp;
}
tmp = mBoundingBox.Maximum.z - mBoundingBox.Center.z;
if (tmp > mEntityRadius)
{
mEntityRadius = tmp;
}
mEntityDiameter = 2.0f * mEntityRadius;
mEntityCenter = mBoundingBox.Center;
//Render impostor textures
RenderTextures(false);
//Set up materials
for (int o = 0; o < ImpostorYawAngles; o++)
{
for (int i = 0; i < ImpostorPitchAngles; i++)
{
mMaterial[i, o] = (Material)MaterialManager.Instance.Create(GetUniqueID("ImpostorMaterial"), "Impostors");
Material m = mMaterial[i, o];
Pass p = m.GetTechnique(0).GetPass(0);
TextureUnitState t = p.CreateTextureUnitState(mTexture.Name);
t.TextureScrollU = (float)(o / ImpostorYawAngles);
t.TextureScrollV = (float)(i / ImpostorPitchAngles);
p.LightingEnabled = false;
m.ReceiveShadows = false;
if (group.BlendMode == ImpostorBlendMode.AlphaReject)
{
p.AlphaRejectFunction = CompareFunction.GreaterEqual;
p.AlphaRejectValue = 128;
}
else if (group.BlendMode == ImpostorBlendMode.AlphaBlend)
{
p.SetSceneBlending(SceneBlendFactor.SourceAlpha, SceneBlendFactor.OneMinusSourceAlpha);
}
}
}
}
