private void UpdateGradient()
{
// See if any gradient has been modified
if (planetLighting.Modified == true)
{
planetLighting.Modified = false;
surfaceLightingTexture = SGT_Helper.DestroyObject(surfaceLightingTexture);
atmosphereTexture = SGT_Helper.DestroyObject(atmosphereTexture);
atmosphereSurfaceTexture = SGT_Helper.DestroyObject(atmosphereSurfaceTexture);
cloudsLightingTexture = SGT_Helper.DestroyObject(cloudsLightingTexture);
}
if (atmosphereTwilightColour.Modified == true)
{
atmosphereTwilightColour.Modified = false;
atmosphereTexture = SGT_Helper.DestroyObject(atmosphereTexture);
atmosphereSurfaceTexture = SGT_Helper.DestroyObject(atmosphereSurfaceTexture);
cloudsLightingTexture = SGT_Helper.DestroyObject(cloudsLightingTexture);
}
if (atmosphereDensityColour.Modified == true)
{
atmosphereDensityColour.Modified = false;
atmosphereTexture = SGT_Helper.DestroyObject(atmosphereTexture);
atmosphereSurfaceTexture = SGT_Helper.DestroyObject(atmosphereSurfaceTexture);
}
if (cloudsLimbColour.Modified == true)
{
cloudsLimbColour.Modified = false;
cloudsLightingTexture = SGT_Helper.DestroyObject(cloudsLightingTexture);
}
// Build colour arrays
var lighting = surfaceLightingTexture == null || atmosphereTexture == null || atmosphereSurfaceTexture == null || cloudsLightingTexture == null?planetLighting.CalculateColours(0.0f, 1.0f, (int)planetLutSize) : null;
var twilight = atmosphereTexture == null || atmosphereSurfaceTexture == null?atmosphereTwilightColour.CalculateColours(0.0f, 1.0f, (int)planetLutSize) : null;
var cloudsTwilight = cloudsLightingTexture == null?atmosphereTwilightColour.CalculateColours(cloudsTwilightOffset, cloudsTwilightOffset + 1.0f, (int)planetLutSize) : null;
var density = atmosphereTexture == null?atmosphereDensityColour.CalculateColours(1.0f, 0.5f, (int)planetLutSize) : null;
var surfaceDensity = atmosphereSurfaceTexture == null?atmosphereDensityColour.CalculateColours(0.0f, 0.5f, (int)planetLutSize) : null;
var cloudsLimb = cloudsLightingTexture == null?cloudsLimbColour.CalculateColours(0.0f, 1.0f, (int)planetLutSize) : null;
// Rebuild textures
if (surfaceLightingTexture == null)
{
updateShader |= ShaderFlags.SurfaceTextureLighting;
surfaceLightingTexture = SGT_ColourGradient.AllocateTexture((int)planetLutSize);
for (var x = 0; x < (int)planetLutSize; x++)
{
surfaceLightingTexture.SetPixel(x, 0, lighting[x]);
}
surfaceLightingTexture.anisoLevel = 8;
surfaceLightingTexture.filterMode = FilterMode.Trilinear;
surfaceLightingTexture.Apply();
}
if (atmosphereTexture == null)
{
updateShader |= ShaderFlags.AtmosphereTexture;
atmosphereTexture = SGT_ColourGradient.AllocateTexture((int)planetLutSize, (int)planetLutSize);
for (var y = 0; y < (int)planetLutSize; y++)
{
var densityColour = density[y];
for (var x = 0; x < (int)planetLutSize; x++)
{
var lightingColour = lighting[x];
//var twilightColour = twilight[x];
lightingColour.a = Mathf.Lerp(atmosphereNightOpacity, 1.0f, lightingColour.grayscale);
//var colour = SGT_Helper.AlphaBlend(densityColour, twilightColour) * lightingColour;
var twilightColour = SGT_Helper.AlphaBlend(Color.white, twilight[x]);
var colour = SGT_Helper.BlendRGB(densityColour * lightingColour, twilightColour, SGT_Helper.ChannelBlendMode.Multiply);
atmosphereTexture.SetPixel(x, y, SGT_Helper.PreventZeroRGB(colour));
atmosphereTexture.filterMode = FilterMode.Trilinear;
}
}
atmosphereTexture.Apply();
}
if (atmosphereSurfaceTexture == null)
{
updateShader |= ShaderFlags.SurfaceTextureAtmosphere;
atmosphereSurfaceTexture = SGT_ColourGradient.AllocateTexture((int)planetLutSize, (int)planetLutSize);
for (var y = 0; y < (int)planetLutSize; y++)
{
var densityColour = surfaceDensity[y];
for (var x = 0; x < (int)planetLutSize; x++)
{
var lightingColour = lighting[x];
var twilightColour = twilight[x];
lightingColour.a = Mathf.Lerp(atmosphereNightOpacity, 1.0f, lightingColour.grayscale);
var colour = SGT_Helper.AlphaBlend(densityColour, twilightColour) * lightingColour;
atmosphereSurfaceTexture.SetPixel(x, y, SGT_Helper.PreventZeroRGB(colour));
atmosphereSurfaceTexture.filterMode = FilterMode.Trilinear;
}
}
atmosphereSurfaceTexture.Apply();
}
if (cloudsLightingTexture == null)
{
updateShader |= ShaderFlags.CloudsTextureLighting;
cloudsLightingTexture = SGT_ColourGradient.AllocateTexture((int)planetLutSize, (int)planetLutSize);
for (var y = 0; y < (int)planetLutSize; y++)
{
var limb = cloudsLimb[y];
for (var x = 0; x < (int)planetLutSize; x++)
{
var colour = lighting[x];
if (atmosphere == true)
{
colour *= SGT_Helper.AlphaBlend(limb, cloudsTwilight[x]);
}
else
{
colour *= limb;
}
cloudsLightingTexture.SetPixel(x, y, colour);
cloudsLightingTexture.filterMode = FilterMode.Trilinear;
}
}
cloudsLightingTexture.Apply();
}
}