Feature/stars (#1598)

* Add the ability to remap SPECK variables to usage values

data/assets/scene/digitaluniverse/stars.asset

@@ -1,6 +1,6 @@
 local assetHelper = asset.require('util/asset_helper')
 
-local colorLUT = asset.require('./stars_colormap').BvColorLUT
+local colormaps = asset.require('./stars_colormap').ColorMaps
 
 local textures = asset.syncedResource({
   Name = "Stars Textures",
@@ -30,10 +30,21 @@ local stars = {
     File = speck .. "/stars.speck",
     Texture = textures .. "/halo.png",
     --ShapeTexture = textures .. "/disc.png",
-    ColorMap = colorLUT .. "/colorbv.cmap",
+    ColorMap = colormaps .. "/colorbv.cmap",
+    OtherDataColorMap = colormaps .. "/viridis.cmap",
     MagnitudeExponent = 6.2,
     SizeComposition = "Distance Modulus",
-    RenderMethod = "Texture Based" -- or PSF
+    RenderMethod = "Texture Based", -- or PSF
+    DataMapping = {
+      Bv = "colorb_v",
+      Luminance = "lum",
+      AbsoluteMagnitude = "absmag",
+      ApparentMagnitude = "appmag",
+      Vx = "vx",
+      Vy = "vy",
+      Vz = "vz",
+      Speed = "speed"
+    }
   },
   GUI = {
     Name = "Stars",
@@ -55,12 +66,22 @@ local sunstar = {
     File = sunspeck .. "/sunstar.speck",
     Texture = textures .. "/halo.png",
     --ShapeTexture = textures .. "/disc.png",
-    ColorMap = colorLUT .. "/colorbv.cmap",
+    ColorMap = colormaps .. "/colorbv.cmap",
     MagnitudeExponent = 6.2,
     SizeComposition = "Distance Modulus",
     RenderMethod = "Texture Based", -- or PSF
     FadeInDistances = { 0.0001, 0.1 },
-    RenderableType = "PostDeferredTransparent"
+    RenderableType = "PostDeferredTransparent",
+    DataMapping = {
+      Bv = "colorb_v",
+      Luminance = "lum",
+      AbsoluteMagnitude = "absmag",
+      ApparentMagnitude = "appmag",
+      Vx = "vx",
+      Vy = "vy",
+      Vz = "vz",
+      Speed = "speed",
+    }
   },
   GUI = {
     Name = "Sun",

data/assets/scene/digitaluniverse/stars_colormap.asset

@@ -1,20 +1,20 @@
 local assetHelper = asset.require('util/asset_helper')
 
-local BvColorLUT = asset.syncedResource({
+local colormaps = asset.syncedResource({
   Name = "Stars Color Table",
   Type = "HttpSynchronization",
   Identifier = "stars_colormap",
   Version = 2
 })
 
-asset.export("BvColorLUT", BvColorLUT)
+asset.export("ColorMaps", colormaps)
 
 asset.meta = {
-  Name = "Stars B-V Colormap",
+  Name = "Star Colormaps",
   Version = "2.0",
-  Description = [[A lookup table that maps a B-V color index to an RGB color. 
-    The B-V values are in the range (-0.4, 2.0) and each line maps a value 
-    in that range to a color]],
+  Description = [[Lookup tables used for star datasets, one of the tables map a B-V color
+    index to an RGB color. The B-V values are in the range (-0.4, 2.0) and each line maps
+    a value in that range to a color. The other table is the commonly used viridis map]],
   Author = "OpenSpace Team",
   URL = "https://www.amnh.org/research/hayden-planetarium/digital-universe",
   License = "AMNH Digital Universe"

data/assets/scene/milkyway/exoplanets/exoplanets_data.asset

@@ -1,4 +1,4 @@
-local bvColorLUT = asset.require('scene/digitaluniverse/stars_colormap').BvColorLUT
+local colormaps = asset.require('scene/digitaluniverse/stars_colormap').ColorMaps
 
 local DataPath = asset.syncedResource({
   Name = "Exoplanet Data Files",
@@ -15,7 +15,7 @@ asset.onInitialize(function ()
 
   p = "Modules.Exoplanets.BvColormap";
   if (openspace.getPropertyValue(p) == "") then
-    openspace.setPropertyValueSingle(p, bvColorLUT .. "/colorbv.cmap")
+    openspace.setPropertyValueSingle(p, colormaps .. "/colorbv.cmap")
   end
 end)
 

data/assets/scene/milkyway/gaia/apogee.asset

@@ -39,7 +39,17 @@ local gaia_abundance_apogee = {
     ColorMap = colorLUT .. "/colorbv.cmap",
     OtherDataColorMap = colorLUT .. "/viridis.cmap",
     StaticFilter = -9999,
-    StaticFilterReplacement = 0.0
+    StaticFilterReplacement = 0.0,
+    DataMapping = {
+      Bv = "colorb_v",
+      Luminance = "lum",
+      AbsoluteMagnitude = "absmag",
+      ApparentMagnitude = "appmag",
+      Vx = "vx",
+      Vy = "vy",
+      Vz = "vz",
+      Speed = "speed"
+    }
   },
   GUI = {
     Path = "/Milky Way/Gaia"

data/assets/scene/milkyway/gaia/galah.asset

@@ -39,7 +39,17 @@ local gaia_abundance_galah = {
     ColorMap = colorLUT .. "/colorbv.cmap",
     OtherDataColorMap = colorLUT .. "/viridis.cmap",
     StaticFilter = -9999,
-    StaticFilterReplacement = 0.0
+    StaticFilterReplacement = 0.0,
+    DataMapping = {
+      Bv = "colorb_v",
+      Luminance = "lum",
+      AbsoluteMagnitude = "absmag",
+      ApparentMagnitude = "appmag",
+      Vx = "vx",
+      Vy = "vy",
+      Vz = "vz",
+      Speed = "speed"
+    }
   },
   GUI = {
     Path = "/Milky Way/Gaia"

data/assets/scene/milkyway/objects/orionnebula/cluster.asset

@@ -19,7 +19,17 @@ local OrionClusterStars = {
     ColorMap = sync .. "/colorbv.cmap",
     MagnitudeExponent = 5.02,
     SizeComposition = "Distance Modulus",
-    RenderMethod = "Texture Based"
+    RenderMethod = "Texture Based",
+    DataMapping = {
+      Bv = "colorb_v",
+      Luminance = "lum",
+      AbsoluteMagnitude = "absmag",
+      ApparentMagnitude = "appmag",
+      Vx = "vx",
+      Vy = "vy",
+      Vz = "vz",
+      Speed = "speed"
+    }
   },
   GUI = {
     Name = "Orion Nebula Star Cluster",

data/assets/scene/milkyway/stars/denver.asset

@@ -32,7 +32,17 @@ local object = {
     ColorMap = colorLUT .. "/denver_colorbv.cmap",
     MagnitudeExponent = 6.2,
     SizeComposition = "Distance Modulus",
-    RenderMethod = "Texture Based" -- or PSF
+    RenderMethod = "Texture Based", -- or PSF
+    DataMapping = {
+      Bv = "colorb_v",
+      Luminance = "lum",
+      AbsoluteMagnitude = "absmag",
+      ApparentMagnitude = "appmag",
+      Vx = "vx",
+      Vy = "vy",
+      Vz = "vz",
+      Speed = "speed"
+    }
   },
   GUI = {
     Name = "Stars (Denver)",