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replace camera layering with cubemap skybox render texture #10

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replace camera layering with cubemap skybox render texture #10

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d4635d7
[proof of concept] use skyCam to render dynamic skybox
fauxnik Sep 7, 2020
a0a9940
stash clearCam cubemap and ZWrite attempts
fauxnik Sep 7, 2020
969ec53
layered cubemaps working!!!
fauxnik Sep 7, 2020
e253f15
some cleanup
fauxnik Sep 7, 2020
38b8b14
stars visible
fauxnik Sep 7, 2020
27bedb3
try to match star intensity
fauxnik Sep 7, 2020
3b61d3a
tweak star values more
fauxnik Sep 7, 2020
b67b38e
more cleanup
fauxnik Sep 7, 2020
46f0260
make vr work again
fauxnik Sep 7, 2020
16b992f
update asset bundle
fauxnik Sep 9, 2020
c59fc91
skip rendering bottom cubemap face
fauxnik Sep 11, 2020
de4d05f
reduce sun disk cubemap size and remove depth info from cubemaps
fauxnik Sep 11, 2020
d2ace02
clean up star material update code
fauxnik Sep 19, 2020
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80 changes: 43 additions & 37 deletions ProceduralSkyInitializer.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,8 +9,8 @@ public class ProceduralSkyInitializer : MonoBehaviour
public const float moonDistanceToCamera = 10;

private Light dirLight;
private Camera mainCam;

private Material _layeredCubemap;
private Material _skyMaterial;
private AudioClip _rainAudioClip;
private GameObject _cloudPrefab;
Expand All @@ -27,6 +27,7 @@ public void Init ()
// Load the asset bundle
AssetBundle assets = AssetBundle.LoadFromFile(Main.ModPath + "Resources/proceduralskymod");

_layeredCubemap = assets.LoadAsset<Material>("Assets/Materials/CubemapOverlay.mat");
_skyMaterial = assets.LoadAsset<Material>("Assets/Materials/Sky.mat");
_rainAudioClip = assets.LoadAsset<AudioClip>("Assets/Audio/rain-03.wav");
_cloudPrefab = assets.LoadAsset<GameObject>("Assets/Prefabs/CloudPlane.prefab");
Expand Down Expand Up @@ -80,41 +81,44 @@ public void Init ()
#if DEBUG
Debug.Log(">>> >>> >>> Setting Up Cameras...");
#endif
// main cam
mainCam = GameObject.FindGameObjectWithTag("MainCamera").GetComponent<Camera>();
mainCam.clearFlags = CameraClearFlags.Depth;
mainCam.cullingMask = -1;
mainCam.cullingMask &= ~(1 << 31);
//mainCam.depth = -1; // original setting

Camera.main.cullingMask = -1;
Camera.main.cullingMask &= ~(1 << 31);

// clear cam
Camera clearCam = new GameObject() { name = "ClearCam" }.AddComponent<Camera>();
clearCam.transform.SetParent(psMaster.transform, false);
clearCam.clearFlags = CameraClearFlags.Skybox;
clearCam.cullingMask = 0;
clearCam.enabled = false;

// override clearCam's skybox with skyMaterial to render sun disk
Skybox clearCamSkybox = clearCam.gameObject.AddComponent<Skybox>();
clearCamSkybox.material = skyMaterial;

// sky cam
Camera skyCam = new GameObject() { name = "SkyCam" }.AddComponent<Camera>();
GameObject skyCamGimbal = new GameObject { name = "SkyCamGimbal" };
skyCamGimbal.transform.SetParent(psMaster.transform, false);
skyCam.transform.SetParent(skyCamGimbal.transform, false);
skyCam.clearFlags = CameraClearFlags.Depth;
skyCam.transform.SetParent(psMaster.transform, false);
skyCam.clearFlags = CameraClearFlags.Color;
skyCam.backgroundColor = Color.clear;
skyCam.cullingMask = 0;
skyCam.cullingMask |= 1 << 31;
skyCam.depth = -2;
skyCam.fieldOfView = mainCam.fieldOfView;
skyCam.nearClipPlane = mainCam.nearClipPlane;
skyCam.farClipPlane = 100;
// this localScale negates VR stereo separation
skyCamGimbal.transform.localScale = Vector3.zero;
skyCamGimbal.AddComponent<PositionConstraintOnPreCull>().source = psMaster.transform;

// clear cam
Camera clearCam = new GameObject() { name = "ClearCam" }.AddComponent<Camera>();
clearCam.clearFlags = CameraClearFlags.Skybox;
clearCam.cullingMask = 0;
clearCam.depth = -3;
clearCam.fieldOfView = mainCam.fieldOfView;

SkyCamConstraint constraint = skyCam.gameObject.AddComponent<SkyCamConstraint>();
constraint.main = mainCam;
constraint.sky = skyCam;
constraint.clear = clearCam;

skyCam.enabled = false;

// skyCamOutputMat will be used for global skybox
int skyCamTexSize = 4096;
RenderTexture clearCamTex = new RenderTexture(skyCamTexSize/4, skyCamTexSize/4, 0, RenderTextureFormat.DefaultHDR);
clearCamTex.dimension = UnityEngine.Rendering.TextureDimension.Cube;
RenderTexture skyCamTex = new RenderTexture(skyCamTexSize, skyCamTexSize, 0, RenderTextureFormat.DefaultHDR);
skyCamTex.dimension = UnityEngine.Rendering.TextureDimension.Cube;
Material skyCamOutputMat = _layeredCubemap;
skyCamOutputMat.SetTexture("_Tex", clearCamTex); // shader: Skybox/Cubemap
skyCamOutputMat.SetTexture("_AlphaTex", skyCamTex); // shader: Skybox/CubemapOverlay

// initialize skybox
clearCam.RenderToCubemap(clearCamTex);
skyCam.RenderToCubemap(skyCamTex);
// cloud render texture cam
Camera cloudRendTexCam = new GameObject() { name = "CloudRendTexCam" }.AddComponent<Camera>();
cloudRendTexCam.transform.SetParent(psMaster.transform);
Expand Down Expand Up @@ -169,7 +173,7 @@ public void Init ()
Debug.Log(">>> >>> >>> Setting Up Audio Sources...");
#endif
GameObject psAudio = new GameObject() { name = "ProceduralSkyAudio" };
psAudio.transform.SetParent(mainCam.transform);
psAudio.transform.SetParent(Camera.main.transform);
RainController.RainAudio = psAudio.AddComponent<AudioSource>();

RainController.RainAudio.clip = _rainAudioClip;
Expand Down Expand Up @@ -218,6 +222,7 @@ public void Init ()
Debug.Log(">>> >>> >>> Setting Up Starbox...");
#endif
GameObject starBox = GameObject.CreatePrimitive(PrimitiveType.Cube);
_starMaterial.SetFloat("_Exposure", .5f);
starBox.GetComponent<MeshRenderer>().sharedMaterial = _starMaterial;
starBox.transform.SetParent(skyboxNight.transform);
starBox.transform.ResetLocal();
Expand Down Expand Up @@ -247,7 +252,7 @@ public void Init ()
GameObject psRainParticleSys = new GameObject() { name = "ProceduralSkyRainParticleSystem" };

PositionConstraintOnUpdate psRainParticleSysconstraint = psRainParticleSys.AddComponent<PositionConstraintOnUpdate>();
psRainParticleSysconstraint.source = mainCam.transform;
psRainParticleSysconstraint.source = Camera.main.transform;

GameObject rainObj = GameObject.Instantiate(_rainPrefab);
rainObj.transform.SetParent(psRainParticleSys.transform);
Expand Down Expand Up @@ -278,11 +283,12 @@ public void Init ()

skyManager.StarMaterial = starBox.GetComponent<MeshRenderer>().sharedMaterial;

skyManager.SkyCam = skyCam.transform;
skyManager.ClearCam = clearCam;
skyManager.ClearCamTex = clearCamTex;
skyManager.SkyCam = skyCam;
skyManager.SkyCamTex = skyCamTex;
skyManager.SkyMaterial = skyMaterial;

skyManager.ClearCam = clearCam.transform;

skyManager.MoonPathCenter = moonBillboard.transform;
skyManager.MoonMaterial = moonBillboard.GetComponent<MeshRenderer>().sharedMaterial;

Expand All @@ -291,7 +297,7 @@ public void Init ()
#endif
// Set render settings
RenderSettings.sun = dirLight;
RenderSettings.skybox = skyMaterial;
RenderSettings.skybox = skyCamOutputMat;
RenderSettings.ambientMode = UnityEngine.Rendering.AmbientMode.Flat;

#if DEBUG
Expand Down
Binary file modified Resources/proceduralskymod
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11 changes: 8 additions & 3 deletions SkyManager.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -26,8 +26,10 @@ public class SkyManager : MonoBehaviour
public Material CloudMaterial { get; set; }
public Material MoonMaterial { get; set; }

public Transform ClearCam { get; set; }
public Transform SkyCam { get; set; }
public Camera SkyCam { get; set; }
public RenderTexture SkyCamTex { get; set; }
public Camera ClearCam { get; set; }
public RenderTexture ClearCamTex { get; set; }
public Transform CloudPlane { get; set; }

void Start ()
Expand Down Expand Up @@ -55,6 +57,9 @@ void Update ()
else
SunLight.cookie = null;

ClearCam.RenderToCubemap(ClearCamTex, 63 & ~(1 << (int)CubemapFace.NegativeY));
SkyCam.RenderToCubemap(SkyCamTex, 63 & ~(1 << (int)CubemapFace.NegativeY));

#if !CYBEX_TIME
// fauxnik time algo
ProceduralSkyTimeSource.Instance.CalculateTimeProgress(Time.deltaTime);
Expand Down Expand Up @@ -111,7 +116,7 @@ void Update ()
SunLight.intensity = sunOverHorizonFac * 1.5f;
SunLight.color = Color.Lerp(new Color(1f, 0.5f, 0), Color.white, sunOverHorizonFac);

StarMaterial.SetFloat("_Visibility", (-sunOverHorizonFac + 1) * .01f);
StarMaterial.SetFloat("_Visibility", Mathf.Clamp01(1f - 4f * sunOverHorizonFac));

MoonMaterial.SetFloat("_MoonDayNight", Mathf.Lerp(2.19f, 1.5f, sunOverHorizonFac));
// gives aproximate moon phase
Expand Down