/// <summary>
/// Bakes the <paramref name="probe" /> and updates its baked texture.
///
/// Note: The update of the probe is persistent only in editor mode.
/// </summary>
/// <param name="probe">The probe to bake.</param>
/// <param name="path">The asset path to write the baked texture to.</param>
/// <param name="options">The options to use for the bake.</param>
/// <returns>
/// Returns <c>null</c> if successful. Otherwise, returns the error that occured.
/// The error can be:
/// * <see cref="ArgumentException" /> if the <paramref name="path" /> is invalid.
/// * <see cref="ArgumentNullException" /> if the <paramref name="probe" /> is <c>null</c>.
/// * <see cref="Exception" /> if the <paramref name="probe" /> is not supported. Only
/// This functional currently only supports <see cref="HDAdditionalReflectionData" /> probes.
/// </returns>
public static Exception BakeProbe([NotNull] HDProbe probe, [NotNull] string path, BakeProbeOptions options)
{
// Check arguments
if (probe == null || probe.Equals(null))
{
return(new ArgumentNullException(nameof(probe)));
}
if (string.IsNullOrEmpty(path))
{
return(new ArgumentException($"{nameof(path)} must not be empty or null."));
}
// We force RGBAHalf as we don't support 11-11-10 textures (only RT)
var probeFormat = GraphicsFormat.R16G16B16A16_SFloat;
switch (probe)
{
case HDAdditionalReflectionData _:
{
// Get the texture size from the probe
var textureSize = options.textureSize.Evaluate(probe);
// Render and write
var cubeRT = HDRenderUtilities.CreateReflectionProbeRenderTarget(textureSize, probeFormat);
HDBakedReflectionSystem.RenderAndWriteToFile(probe, path, cubeRT, null);
cubeRT.Release();
// Import asset at target location
AssetDatabase.ImportAsset(path);
HDBakedReflectionSystem.ImportAssetAt(probe, path);
// Assign to the probe the baked texture
var bakedTexture = AssetDatabase.LoadAssetAtPath <Texture>(path);
probe.SetTexture(ProbeSettings.Mode.Baked, bakedTexture);
// Mark probe as dirty
EditorUtility.SetDirty(probe);
return(null);
}
case PlanarReflectionProbe _:
return(new Exception("Planar reflection probe baking is not supported."));
default: return(new Exception($"Cannot handle probe type: {probe.GetType()}"));
}
}
/// <summary>
/// Evaluates a probe and gets the texture size to use for baking.
/// </summary>
/// <param name="probe">The probe to get the texture size for.</param>
/// <returns>Returns the size of the texture to use for the bake.</returns>
/// <exception cref="ArgumentNullException">
/// When <paramref name="probe" /> is <c>null</c> and the mode
/// <see cref="Mode.UseProbeResolution" /> is used.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">When <see cref="mode" /> has an invalid value.</exception>
public int Evaluate(HDProbe probe)
{
switch (mode)
{
case Mode.CustomValue: return(customValue);
case Mode.UseProbeResolution:
{
if (probe == null || probe.Equals(null))
{
throw new ArgumentNullException(nameof(probe));
}
return((int)probe.resolution);
}
default: throw new ArgumentOutOfRangeException(nameof(mode));
}
}
