Minor improvements

src/helper/mix.ts

@@ -1 +0,0 @@
-export const mix = (from: number, to: number, q: number) => from + (to - from) * q;

src/helper/rgba.ts

@@ -0,0 +1,4 @@
+import { vec4 } from 'gl-matrix';
+
+export const rgba = (r: number, g: number, b: number, a: number): vec4 =>
+  vec4.fromValues(r, g, b, a);

src/helper/rgba255.ts

@@ -0,0 +1,4 @@
+import { vec4 } from 'gl-matrix';
+
+export const rgba255 = (r: number, g: number, b: number, a: number): vec4 =>
+  vec4.fromValues(r / 255, g / 255, b / 255, a / 255);