[sigma] Adds new rendering util numberToGLSLFloat

Details:
- Deletes numberToGLSLFloat from node-border and node-piechart
- Replaces them by numberToGLSLFloat, exported from sigma/rendering
- Adds some unit tests for this helper

packages/node-border/src/shader-frag.ts

@@ -1,4 +1,6 @@
-import { CreateNodeBorderProgramOptions, DEFAULT_BORDER_SIZE_MODE, NodeBorderSize, numberToGLSLFloat } from "./utils";
+import { numberToGLSLFloat } from "sigma/rendering";
+
+import { CreateNodeBorderProgramOptions, DEFAULT_BORDER_SIZE_MODE, NodeBorderSize } from "./utils";
 
 export default function getFragmentShader({ borders }: CreateNodeBorderProgramOptions) {
   const fillCounts = numberToGLSLFloat(borders.filter(({ size }) => "fill" in size).length);

packages/node-border/src/utils.ts

@@ -22,7 +22,3 @@ export const DEFAULT_CREATE_NODE_BORDER_OPTIONS: CreateNodeBorderProgramOptions
 };
 
 export const DEFAULT_COLOR = "#000000";
-
-export function numberToGLSLFloat(n: number): string {
-  return n % 1 === 0 ? n.toFixed(1) : n.toString();
-}

packages/node-piechart/src/shader-frag.ts

@@ -1,4 +1,6 @@
-import { CreateNodePiechartProgramOptions, numberToGLSLFloat } from "./utils";
+import { numberToGLSLFloat } from "sigma/rendering";
+
+import { CreateNodePiechartProgramOptions } from "./utils";
 
 export default function getFragmentShader({ slices, offset }: CreateNodePiechartProgramOptions) {
   // language=GLSL

packages/node-piechart/src/utils.ts

@@ -18,7 +18,3 @@ export const DEFAULT_CREATE_NODE_PIECHART_OPTIONS: Omit<CreateNodePiechartProgra
   defaultColor: DEFAULT_COLOR,
   offset: { value: 0 },
 };
-
-export function numberToGLSLFloat(n: number): string {
-  return n % 1 === 0 ? n.toFixed(1) : n.toString();
-}

packages/sigma/src/rendering/utils.ts

@@ -71,3 +71,10 @@ export function loadProgram(gl: WebGLRenderingContext, shaders: Array<WebGLShade
 
   return program;
 }
+
+/**
+ * Function use to print a float for inserting in a GLSL program.
+ */
+export function numberToGLSLFloat(n: number): string {
+  return n % 1 === 0 ? n.toFixed(1) : n.toString();
+}

packages/test/unit/rendering.ts

@@ -0,0 +1,21 @@
+import { numberToGLSLFloat } from "sigma/rendering";
+import { describe, expect, test } from "vitest";
+
+describe("rendering utils", () => {
+  describe("numberToGLSLFloat", () => {
+    test('it should properly print all kind of numbers to "GLSL float" strings', () => {
+      const tests: [number, string][] = [
+        [1, "1.0"],
+        [123, "123.0"],
+        [1.23, "1.23"],
+        [0.123, "0.123"],
+        [1230, "1230.0"],
+        [12300, "12300.0"],
+        [1e-6, "0.000001"],
+        [1e6, "1000000.0"],
+      ];
+
+      tests.forEach(([input, expectedOutput]) => expect(numberToGLSLFloat(input)).toBe(expectedOutput));
+    });
+  });
+});