public void BuildMaterialPasses(PageDecalInfo pageInfo)
{
Technique t = FindPageTechnique(pageInfo.Coord);
if (t != null)
{
float pageX = pageInfo.Coord.X * TerrainManager.Instance.PageSize * TerrainManager.oneMeter;
float pageZ = pageInfo.Coord.Z * TerrainManager.Instance.PageSize * TerrainManager.oneMeter;
int availableTexUnits = 0;
int curTexUnit = 0;
int texUnitsPerPass = 8;
Pass p = null;
foreach (DecalElement element in pageInfo.Decals)
{
// if there are no texture units available, allocate a new pass
if (availableTexUnits == 0)
{
p = t.CreatePass();
pageInfo.Passes.Add(p);
p.SetSceneBlending(SceneBlendType.TransparentAlpha);
// TODO: Unclear what should happen here. The new Ogre interface
// supports SetDepthBias(constantBias, slopeBias), but the units are
// different. Ask Jeff.
p.DepthBias = 1;
curTexUnit = 0;
availableTexUnits = texUnitsPerPass;
}
TextureUnitState texUnit = p.CreateTextureUnitState(element.ImageName, 0);
if (curTexUnit == 0)
{
texUnit.SetColorOperation(LayerBlendOperation.Replace);
texUnit.SetAlphaOperation(LayerBlendOperationEx.Source1, LayerBlendSource.Texture, LayerBlendSource.Current, 0, 0, 0);
}
else
{
texUnit.SetColorOperation(LayerBlendOperation.AlphaBlend);
texUnit.SetAlphaOperation(LayerBlendOperationEx.AddSmooth, LayerBlendSource.Texture, LayerBlendSource.Current, 0, 0, 0);
}
texUnit.TextureAddressing = TextureAddressing.Border;
texUnit.TextureBorderColor = new ColorEx(0, 0, 0, 0);
element.UpdateTextureTransform(texUnit, pageX, pageZ);
// bump the counts
curTexUnit++;
availableTexUnits--;
}
}
}
protected void ResetOpacity()
{
try
{
TextureUnitState state = ManualObject.GetSection(0).GetMaterial().GetBestTechnique().GetPass(0).GetTextureUnitState(0);
state.SetAlphaOperation(LayerBlendOperationEx.LBX_MODULATE, LayerBlendSource.LBS_TEXTURE, LayerBlendSource.LBS_MANUAL, 1.0f, 1.0f);
}
catch (Exception)
{
}
}
public bool DecreaseOpacity(float o)
{
if (opacity < 0)
{
return(false);
}
opacity -= o;
if (opacity < 0)
{
ManualObject.Visible = false;
opacity = 0;
return(false);
}
TextureUnitState state = ManualObject.GetSection(0).GetMaterial().GetBestTechnique().GetPass(0).GetTextureUnitState(0);
state.SetAlphaOperation(LayerBlendOperationEx.LBX_MODULATE, LayerBlendSource.LBS_TEXTURE, LayerBlendSource.LBS_MANUAL, 1.0f, opacity);
return(true);
}