Fixed #118: Added color constants

sandbox/uvsandbox/src/main/scala/com/example/sandbox/shaders/ShaderPrograms.scala

@@ -157,8 +157,9 @@ object TriangleShader:
 object FillColorHelper:
 
   import ultraviolet.syntax.*
+  import ultraviolet.colors.*
 
   inline def fill(uv: vec2, sdf: Float): vec4 =
-    val fill       = vec4(uv, 0.0f, 1.0f)
+    val fill       = vec4(uv, Blue.z, 1.0f)
     val fillAmount = (1.0f - step(0.0f, sdf)) * fill.w
     vec4(fill.xyz * fillAmount, fillAmount)

ultraviolet/shared/src/main/scala/ultraviolet/colors.scala

@@ -0,0 +1,33 @@
+package ultraviolet
+
+import ultraviolet.syntax.*
+
+// https://en.wikipedia.org/wiki/X11_color_names
+
+object colors:
+
+  inline def Red: vec4       = vec4(1.0f, 0.0f, 0.0f, 1.0f)
+  inline def Green: vec4     = vec4(0.0f, 1.0f, 0.0f, 1.0f)
+  inline def Blue: vec4      = vec4(0.0f, 0.0f, 1.0f, 1.0f)
+  inline def Yellow: vec4    = vec4(1.0f, 1.0f, 0.0f, 1.0f)
+  inline def Magenta: vec4   = vec4(1.0f, 0.0f, 1.0f, 1.0f)
+  inline def Cyan: vec4      = vec4(0.0f, 1.0f, 1.0f, 1.0f)
+  inline def White: vec4     = vec4(1.0f, 1.0f, 1.0f, 1.0f)
+  inline def Black: vec4     = vec4(0.0f, 0.0f, 0.0f, 1.0f)
+  inline def Coral: vec4     = vec4(1.0f, 0.498f, 0.314f, 1.0f)
+  inline def Crimson: vec4   = vec4(0.863f, 0.078f, 0.235f, 1.0f)
+  inline def DarkBlue: vec4  = vec4(0.0f, 0.0f, 0.545f, 1.0f)
+  inline def Indigo: vec4    = vec4(0.294f, 0.0f, 0.510f, 1.0f)
+  inline def Olive: vec4     = vec4(0.502f, 0.502f, 0.0f, 1.0f)
+  inline def Orange: vec4    = vec4(1.0f, 0.647f, 0.0f, 1.0f)
+  inline def Pink: vec4      = vec4(1.0f, 0.753f, 0.796f, 1.0f)
+  inline def Plum: vec4      = vec4(0.867f, 0.627f, 0.867f, 1.0f)
+  inline def Purple: vec4    = vec4(0.627f, 0.125f, 0.941f, 1.0f)
+  inline def Salmon: vec4    = vec4(0.980f, 0.502f, 0.447f, 1.0f)
+  inline def SeaGreen: vec4  = vec4(0.180f, 0.545f, 0.341f, 1.0f)
+  inline def Silver: vec4    = vec4(0.753f, 0.753f, 0.753f, 1.0f)
+  inline def SlateGray: vec4 = vec4(0.439f, 0.502f, 0.565f, 1.0f)
+  inline def SteelBlue: vec4 = vec4(0.275f, 0.510f, 0.706f, 1.0f)
+  inline def Teal: vec4      = vec4(0.0f, 0.502f, 0.502f, 1.0f)
+  inline def Thistle: vec4   = vec4(0.847f, 0.749f, 0.847f, 1.0f)
+  inline def Tomato: vec4    = vec4(1.0f, 0.388f, 0.278f, 1.0f)