private void CameraPreRender(Camera camera)
{
// Write CameraOffset
if (Outers != null)
{
var dir = camera.transform.position - transform.position;
var pos = transform.InverseTransformPoint(transform.position + dir.normalized * CameraOffset);
for (var i = Outers.Count - 1; i >= 0; i--)
{
var outer = Outers[i];
if (outer != null)
{
outer.transform.localPosition = pos;
}
}
}
// Write camera-dependant shader values
if (InnerMaterial != null && OuterMaterial != null)
{
var cameraPosition = camera.transform.position;
var localCameraPosition = transform.InverseTransformPoint(cameraPosition);
var localDistance = localCameraPosition.magnitude;
var clampedSky = Mathf.InverseLerp(OuterRadius, InnerMeshRadius, localDistance);
var innerAtmosphereDepth = default(float);
var outerAtmosphereDepth = default(float);
var radiusRatio = SgtHelper.Divide(InnerMeshRadius, OuterRadius);
var scaleDistance = SgtHelper.Divide(localDistance, OuterRadius);
var innerDensity = 1.0f - InnerFog;
var outerDensity = 1.0f - OuterFog;
SgtHelper.CalculateAtmosphereThicknessAtHorizon(radiusRatio, 1.0f, scaleDistance, out innerAtmosphereDepth, out outerAtmosphereDepth);
SgtHelper.SetTempMaterial(InnerMaterial, OuterMaterial);
if (scaleDistance > 1.0f)
{
SgtHelper.EnableKeyword("SGT_A"); // Outside
}
else
{
SgtHelper.DisableKeyword("SGT_A"); // Outside
}
InnerMaterial.SetFloat("_HorizonLengthRecip", SgtHelper.Reciprocal(innerAtmosphereDepth * innerDensity));
OuterMaterial.SetFloat("_HorizonLengthRecip", SgtHelper.Reciprocal(outerAtmosphereDepth * outerDensity));
if (OuterDepthTex != null)
{
#if UNITY_EDITOR
SgtHelper.MakeTextureReadable(OuterDepthTex);
#endif
OuterMaterial.SetFloat("_Sky", Sky * OuterDepthTex.GetPixelBilinear(clampedSky / outerDensity, 0.0f).a);
}
UpdateMaterialNonSerialized();
}
}
public virtual void SetCurrentCamera(Camera c)
{
if (c != null)
{
UpdateMaterial();
var cameraPosition = c.transform.position;
var localCameraPosition = transform.InverseTransformPoint(cameraPosition);
var localDistance = localCameraPosition.magnitude;
var clampedAltitude = Mathf.InverseLerp(MiddleRadius, OuterRadius, localDistance);
var innerAtmosphereDepth = default(float);
var outerAtmosphereDepth = default(float);
var radiusRatio = SgtHelper.Divide(InnerMeshRadius, OuterRadius);
var innerHeightRatio = SgtHelper.Divide(MiddleHeight, OuterRadius);
var scaleDistance = SgtHelper.Divide(localDistance, OuterRadius);
var fog = 1.0f - Fog;
SgtHelper.CalculateAtmosphereThicknessAtHorizon(radiusRatio, 1.0f, scaleDistance, out innerAtmosphereDepth, out outerAtmosphereDepth);
// Make the fog level reduce when you get closer than the ground height
innerAtmosphereDepth = Mathf.Max(innerAtmosphereDepth, innerHeightRatio);
if (scaleDistance > 1.0f)
{
innerKeywords.Add("SGT_A"); outerKeywords.Add("SGT_A");
}
if (Smooth == true)
{
innerKeywords.Add("SGT_B"); outerKeywords.Add("SGT_B");
}
SgtHelper.SetKeywords(innerMaterial, innerKeywords); innerKeywords.Clear();
SgtHelper.SetKeywords(outerMaterial, outerKeywords); outerKeywords.Clear();
innerMaterial.SetFloat("_HorizonLengthRecip", SgtHelper.Reciprocal(innerAtmosphereDepth * fog));
outerMaterial.SetFloat("_HorizonLengthRecip", SgtHelper.Reciprocal(outerAtmosphereDepth * fog));
outerMaterial.SetFloat("_Power", CalculateOuterPower(cameraPosition, clampedAltitude));
}
}
