/// <summary>
/// Assign the Keys to the textures in the tree.
/// </summary>
/// <param name="node">The node to look into.</param>
/// <param name="getTextureKey">The delegate function to get the correct key.</param>
private void AssignParameterKeys(IMaterialNode node, TextureKeyGetter getTextureKey)
{
var allTextures = GatherTextureValues(node).Distinct().ToList();
var textureKeys = new Dictionary <string, ParameterKey <Graphics.Texture> >();
foreach (var texSlot in allTextures)
{
//TODO: compare texture sampling method
ParameterKey <Graphics.Texture> pk;
var textureName = texSlot.TextureName;
if (textureName == null || !textureKeys.TryGetValue(textureName, out pk))
{
pk = getTextureKey(this);
if (textureName != null)
{
textureKeys.Add(textureName, pk);
}
}
texSlot.UsedParameterKey = pk;
texSlot.Sampler.SamplerParameterKey = TexturingKeys.Sampler;
}
}
/// <summary>
/// Assign the Keys to the textures and the samplers in the list.
/// </summary>
/// <param name="nodes">List of nodes.</param>
/// <param name="samplers">The list of sampler existing outside of MaterialTextureNode</param>
/// <param name="getTextureKey">The delegate function to get the correct key.</param>
private void AssignParameterKeys(IEnumerable <MaterialTextureNode> nodes, IEnumerable <NodeParameterSampler> samplers, TextureKeyGetter getTextureKey)
{
var textureKeys = new Dictionary <IMaterialNode, ParameterKey <Graphics.Texture> >();
var samplerKeys = new Dictionary <SamplerDescription, ParameterKey <SamplerState> >();
int samplerIndex = 0;
// assign the predefined keys
foreach (var texSlot in nodes.Distinct())
{
if (!texSlot.AutoAssignKey && texSlot.Key != null)
{
texSlot.UsedParameterKey = (ParameterKey <Graphics.Texture>)texSlot.Key;
textureKeys.Add(texSlot, texSlot.UsedParameterKey);
usedTextureKeys.Add(texSlot.UsedParameterKey);
}
}
// assign/generate all the keys
foreach (var texSlot in nodes.Distinct())
{
ParameterKey <Graphics.Texture> textureParameterKey;
if (!textureKeys.TryGetValue(texSlot, out textureParameterKey))
{
textureParameterKey = getTextureKey(this);
textureKeys.Add(texSlot, textureParameterKey);
}
texSlot.UsedParameterKey = textureParameterKey;
SetSamplerKey(texSlot.Sampler, samplerKeys, ref samplerIndex);
}
if (samplers != null)
{
foreach (var gen in samplers)
{
SetSamplerKey(gen, samplerKeys, ref samplerIndex);
}
}
}