/// <summary>
/// Applies the texture data in the <c>XRTextureDescriptor</c> to the reflection probe settings.
/// </summary>
/// <param name="textureDescriptor">The environment texture data to apply to the reflection probe baked
/// texture.</param>
void UpdateEnvironmentTexture(XRTextureDescriptor textureDescriptor)
{
// If the current environment texture equals the given environment texture, the texture does not need to be
// updated.
if (m_CurrentTextureDescriptor.Equals(textureDescriptor))
{
return;
}
// Get the current baked texture as a cubemap, if any.
Cubemap cubemapTexture = m_ReflectionProbe.customBakedTexture as Cubemap;
#if UNITY_2019_1_OR_NEWER
const bool k_NoCubemapUpdate = false;
#else
const bool k_NoCubemapUpdate = true;
#endif
// If there is no current reflection probe texture or if the current environment texture data is not
// identical to the given environment texture metadata, then we need to create a new environment texture
// object.
if (k_NoCubemapUpdate || (cubemapTexture == null) ||
!m_CurrentTextureDescriptor.hasIdenticalTextureMetadata(textureDescriptor))
{
// Destroy any previous texture object.
if (m_ReflectionProbe.customBakedTexture != null)
{
Object.Destroy(m_ReflectionProbe.customBakedTexture);
}
// Create a new environment texture object.
m_ReflectionProbe.customBakedTexture = CreateEnvironmentTexture(textureDescriptor);
}
#if UNITY_2019_1_OR_NEWER
else
{
// Else, we have a current texture object with identical metadata, we simply update the external
// texture with the native texture.
cubemapTexture.UpdateExternalTexture(textureDescriptor.nativeTexture);
}
#endif
// Update the current environment texture metadata.
m_CurrentTextureDescriptor = textureDescriptor;
}