add particles

3 files changed, 33 insertions, 0 deletions

diff --git a/src/engine/utils/colors.ts b/src/engine/utils/colors.ts
new file mode 100644
index 0000000..199180c
--- /dev/null
+++ b/src/engine/utils/colors.ts
@@ -0,0 +1,22 @@
+// gruvbox dark
+export const colors = {
+  bg: "#282828",
+  fg: "#ebdbb2",
+  red: "#cc241d",
+  green: "#98971a",
+  yellow: "#d79921",
+  blue: "#458588",
+  purple: "#b16286",
+  aqua: "#689d6a",
+  orange: "#d65d0e",
+  gray: "#a89984",
+  lightGray: "#928374",
+  darkGray: "#3c3836",
+  lightRed: "#fb4934",
+  lightGreen: "#b8bb26",
+  lightYellow: "#fabd2f",
+  lightBlue: "#83a598",
+  lightPurple: "#d3869b",
+  lightAqua: "#8ec07c",
+  lightOrange: "#fe8019",
+};
diff --git a/src/engine/utils/index.ts b/src/engine/utils/index.ts
index 78b600e..48b94b8 100644
--- a/src/engine/utils/index.ts
+++ b/src/engine/utils/index.ts
@@ -2,3 +2,5 @@ export * from "./clamp";
 export * from "./dotProduct";
 export * from "./rotateVector";
 export * from "./modal";
+export * from "./colors";
+export * from "./random";
diff --git a/src/engine/utils/random.ts b/src/engine/utils/random.ts
new file mode 100644
index 0000000..3d9d8b8
--- /dev/null
+++ b/src/engine/utils/random.ts
@@ -0,0 +1,9 @@
+export const normalRandom = (mean: number, stdDev: number, maxStdDevs = 2) => {
+  const [u, v] = [0, 0].map(() => Math.random() + 1e-12);
+  const normal =
+    mean + stdDev * Math.sqrt(-2.0 * Math.log(u)) * Math.cos(2.0 * Math.PI * v);
+  return Math.min(
+    mean + maxStdDevs * stdDev,
+    Math.max(mean - maxStdDevs * stdDev, normal),
+  );
+};