public override IEnumerator ComputeStarData()
{
SendProgress(0);
// Create 1 large texture, then render smaller tiles into it.
Texture2D tex = new Texture2D((int)imageSize, (int)imageSize, TextureFormat.RGBA32, false);
// Random points on sphere surface to position stars.
int tileSize = (int)imageSize;
List <StarPoint> starPoints = GenerateRandomStarsPoints(density, tileSize, tileSize);
SendProgress(0);
// Fill in the image.
for (int yIndex = 0; yIndex < tileSize; yIndex++)
{
float yPercent = (float)yIndex / (float)(tileSize - 1);
float yPosition = SphereUtility.PercentToHeight(yPercent);
for (int xIndex = 0; xIndex < tileSize; xIndex++)
{
float anglePercent = (float)xIndex / (float)(tileSize - 1);
float angle = SphereUtility.PercentToRadAngle(anglePercent);
Vector3 currentSpot = SphereUtility.SphericalToPoint(yPosition, angle);
// Closest star to current spot.
StarPoint star = NearestStarPoint(currentSpot, starPoints);
UnityEngine.Color c = new UnityEngine.Color(
PointAxisToPercent(star.position.x),
PointAxisToPercent(star.position.y),
PointAxisToPercent(star.position.z),
star.noise); // Noise value used to randomize each star.
tex.SetPixel(xIndex, yIndex, c);
}
// Update the GUI progress bar.
float totalProgress = (float)((yIndex + 1) * tileSize) / (float)(tileSize * tileSize);
SendProgress(totalProgress);
yield return(null);
}
tex.Apply(false);
SendCompletion(tex, true);
yield break;
}
void UpdateMoonData(List <MaterialProperty> allProps)
{
MaterialProperty heightProp = GetPropertyWithName(allProps, "_MoonHeight");
if (heightProp == null)
{
Debug.LogError("Missing moon height property");
return;
}
MaterialProperty angleProp = GetPropertyWithName(allProps, "_MoonAngle");
if (angleProp == null)
{
Debug.LogError("Missing moon angle property");
return;
}
// Convert our percent properties to spherical point.
float moonYPosition = SphereUtility.PercentToHeight(heightProp.floatValue);
float moonAngle = SphereUtility.PercentToRadAngle(angleProp.floatValue);
Vector3 moonPoint = SphereUtility.SphericalToPoint(moonYPosition, moonAngle);
float xRotation = 0;
float yRotation = 0;
SphereUtility.CalculateStarRotation(moonPoint, out xRotation, out yRotation);
MaterialProperty moonPositionProp = GetPropertyWithName(allProps, "_MoonComputedPositionData");
if (moonPositionProp == null)
{
Debug.LogError("Can't update precomputed moon position without property");
return;
}
moonPositionProp.vectorValue = new Vector4(moonPoint.x, moonPoint.y, moonPoint.z, 0);
MaterialProperty moonRotationProp = GetPropertyWithName(allProps, "_MoonComputedRotationData");
if (moonRotationProp == null)
{
Debug.LogError("Can't update precomputed moon rotation without property");
return;
}
moonRotationProp.vectorValue = new Vector4(xRotation, yRotation, 0, 0);
}
public void UpdateMoonData()
{
// Convert our percent properties to spherical point.
float moonYPosition = SphereUtility.PercentToHeight(verticalPosition);
float moonAngle = SphereUtility.PercentToRadAngle(horizontalPosition);
Vector3 moonPoint = SphereUtility.SphericalToPoint(moonYPosition, moonAngle);
float xRotation = 0;
float yRotation = 0;
SphereUtility.CalculateStarRotation(moonPoint, out xRotation, out yRotation);
Vector4 moonPositionData = new Vector4(moonPoint.x, moonPoint.y, moonPoint.z, 0);
Vector4 moonRotationData = new Vector4(xRotation, yRotation, 0, 0);
moonMaterial.SetVector("_MoonComputedPositionData", moonPositionData);
moonMaterial.SetVector("_MoonComputedRotationData", moonRotationData);
}