Improve color handling approach

src/graphics/rendering/settings/default-runtime-settings.ts

@@ -1,4 +1,4 @@
-import { vec3, vec4 } from 'gl-matrix';
+import { vec3 } from 'gl-matrix';
 import { RuntimeSettings } from './runtime-settings';
 
 /**
@@ -9,7 +9,6 @@ export const defaultRuntimeSettings: RuntimeSettings = {
   tileMultiplier: 8,
   isWorldInverted: false,
   lightCutoffDistance: 400,
-  backgroundColor: vec4.fromValues(1, 1, 1, 1),
   colorPalette: [],
   ambientLight: vec3.fromValues(0.25, 0.15, 0.25),
   textures: {},

src/graphics/rendering/settings/default-startup-settings.ts

@@ -1,3 +1,4 @@
+import { vec4 } from 'gl-matrix';
 import { StartupSettings } from './startup-settings';
 
 /**
@@ -7,5 +8,6 @@ export const defaultStartupSettings: StartupSettings = {
   shadowTraceCount: 16,
   paletteSize: 256,
   ignoreWebGL2: false,
+  backgroundColor: vec4.fromValues(1, 1, 1, 1),
   enableStopwatch: false,
 };

src/graphics/rendering/settings/runtime-settings.ts

@@ -38,18 +38,13 @@ export interface RuntimeSettings {
    */
   lightCutoffDistance: number;
 
-  /**
-   * The default background color of the scene, can have transparency.
-   */
-  backgroundColor: vec3 | vec4;
-
   /**
    * Its length should be less than the one specified in [[StartupSettings]].paletteSize.
    *
    * The possible colors for the objects. Each color is referenced by its index in the
    * palette.
    *
-   * Can have transparency.
+   * Can have transparency, but only if WebGL2 support is enabled.
    */
   colorPalette: Array<vec3 | vec4>;
 

src/graphics/rendering/settings/startup-settings.ts

@@ -1,3 +1,5 @@
+import { vec3, vec4 } from 'gl-matrix';
+
 /**
  * Interface for a configuration object containing the settings
  * that need to be given before shader compilation.
@@ -31,6 +33,11 @@ export interface StartupSettings {
    */
   paletteSize: number;
 
+  /**
+   * The default background color of the scene, can have transparency on every platform.
+   */
+  backgroundColor: vec3 | vec4;
+
   /**
    * When set to `true`, rendering will fall back to WebGL
    * even when WebGL2 is present.