// ShaderLab doesn't understand virtual texture inputs, they need to be processed to replace the virtual texture input with the layers that compose it instead
public static GraphInputData ProcessVirtualTextureProperty(VirtualTextureShaderProperty virtualTextureShaderProperty)
{
var layerReferenceNames = new List <string>();
virtualTextureShaderProperty.GetPropertyReferenceNames(layerReferenceNames);
var virtualTextureLayerDataList = new List <SubPropertyData>();
// Skip the first entry in this list as that's the Virtual Texture reference name itself, which won't exist in ShaderLab
foreach (var referenceName in layerReferenceNames.Skip(1))
{
var layerPropertyData = new SubPropertyData()
{
referenceName = referenceName, propertyType = PropertyType.Texture2D
};
virtualTextureLayerDataList.Add(layerPropertyData);
}
var virtualTexturePropertyData = new GraphInputData()
{
referenceName = virtualTextureShaderProperty.displayName, propertyType = PropertyType.VirtualTexture, isKeyword = false
};
virtualTexturePropertyData.isCompoundProperty = true;
virtualTexturePropertyData.subProperties = virtualTextureLayerDataList;
return(virtualTexturePropertyData);
}
internal override ShaderInput Copy()
{
var vt = new VirtualTextureShaderProperty
{
displayName = displayName,
value = new SerializableVirtualTexture(),
};
// duplicate layer data, but reset reference names (they should be unique)
for (int layer = 0; layer < value.layers.Count; layer++)
{
var guid = Guid.NewGuid();
vt.value.layers.Add(new SerializableVirtualTextureLayer(value.layers[layer]));
}
return(vt);
}
internal override ShaderInput Copy()
{
var vt = new VirtualTextureShaderProperty
{
displayName = displayName,
hidden = hidden,
value = new SerializableVirtualTexture(),
precision = precision
};
// duplicate layer data, but reset reference names (they should be unique)
for (int layer = 0; layer < value.layers.Count; layer++)
{
var guid = Guid.NewGuid();
vt.value.layers.Add(
new SerializableVirtualTextureLayer(
value.layers[layer].layerName,
$"Layer_{GuidEncoder.Encode(guid)}",
value.layers[layer].layerTexture));
}
return(vt);
}
