private void Start()
{
if (computeShader == null)
{
throw new System.InvalidOperationException("Compute shader not set!");
}
if (_instance != null)
{
throw new System.InvalidOperationException("AtmosphereScatteringLutManager already exists!");
}
_instance = this;
AtmLutHelper.Init(computeShader);
for (int i = 0; i < pingPongUpdaters.Length; i++)
{
pingPongUpdaters[i] = new ProgressiveLutUpdater(null, lutConfig, this);
pingPongUpdaters[i].name = "Updater " + i;
}
//Quickly complete two set luts.
for (int i = 1; i <= 2; i++)
{
pingPongUpdaters[i].atmConfigToUse = atmosphereConfig;
var t = pingPongUpdaters[i].UpdateCoroutine();
while (t.MoveNext())
{
;
}
}
UpdateSkyboxMaterial(pingPongUpdaters[1], pingPongUpdaters[2]);
KickOffUpdater(pingPongUpdaters[0]);
}
public void UpdateSkyboxMaterial(ProgressiveLutUpdater updater, ProgressiveLutUpdater oldUpdater)
{
if (this.skyboxMaterial == null)
{
this.skyboxMaterial = new Material(Shader.Find("Skybox/AtmosphereScatteringPrecomputed"));
}
updater.atmConfigUsedToUpdate.Apply(skyboxMaterial);
Shader.SetGlobalTexture("_SingleRayleigh_1", oldUpdater.singleRayleigh);
Shader.SetGlobalTexture("_SingleMie_1", oldUpdater.singleMie);
Shader.SetGlobalTexture("_SingleRayleigh_2", updater.singleRayleigh);
Shader.SetGlobalTexture("_SingleMie_2", updater.singleMie);
Shader.SetGlobalTexture("_MultipleScattering_1", oldUpdater.multiScatteringCombine);
Shader.SetGlobalTexture("_MultipleScattering_2", updater.multiScatteringCombine);
Shader.SetGlobalTexture("_Transmittance_1", oldUpdater.transmittance);
Shader.SetGlobalTexture("_Transmittance_2", updater.transmittance);
Shader.SetGlobalTexture("_GroundIrradiance_1", oldUpdater.groundIrradianceCombine);
Shader.SetGlobalTexture("_GroundIrradiance_2", updater.groundIrradianceCombine);
Shader.SetGlobalVector("_ScatteringSize", (Vector3)lutConfig.scatteringSize);
Shader.SetGlobalVector("_GroundIrradianceSize", (Vector2)lutConfig.irradianceSize);
Shader.SetGlobalVector("_TransmittanceSize", (Vector2)lutConfig.transmittanceSize);
RenderSettings.skybox = this.skyboxMaterial;
}
private void KickOffUpdater(ProgressiveLutUpdater updater)
{
updater.atmConfigToUse = atmosphereConfig;
StartCoroutine(updater.UpdateCoroutine());
}