Refactor Shiny widget and shader code to remove unused time variable; optimize shader functions by eliminating time dependency for improved performance

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

lib/src/shiny_widget.dart

@@ -2,7 +2,6 @@ import 'dart:async';
 import 'dart:ui' as ui;
 
 import 'package:flutter/material.dart';
-import 'package:flutter/scheduler.dart';
 
 import 'shiny_controller.dart';
 
@@ -244,30 +243,19 @@ class Shiny extends StatefulWidget {
   State<Shiny> createState() => _ShinyState();
 }
 
-class _ShinyState extends State<Shiny> with TickerProviderStateMixin {
+class _ShinyState extends State<Shiny> {
   static Future<ui.FragmentProgram>? _programFuture;
 
   ui.FragmentShader? _shader;
   StreamSubscription<Offset>? _tiltSub;
-  late final Ticker _ticker;
-
-  double _time = 0.0;
   Offset _tilt = Offset.zero;
 
   @override
   void initState() {
     super.initState();
-    _ticker = createTicker((Duration elapsed) {
-      if (!mounted || _shader == null) return;
-      setState(() {
-        _time = elapsed.inMicroseconds / 1000000.0;
-      });
-    });
-
     _attachController();
     if (widget.enableShader) {
       _loadShader();
-      _ticker.start();
     }
   }
 
@@ -282,9 +270,6 @@ class _ShinyState extends State<Shiny> with TickerProviderStateMixin {
     if (oldWidget.enableShader != widget.enableShader) {
       if (widget.enableShader) {
         if (_shader == null) _loadShader();
-        _ticker.start();
-      } else {
-        _ticker.stop();
       }
     }
   }
@@ -329,7 +314,6 @@ class _ShinyState extends State<Shiny> with TickerProviderStateMixin {
 
   @override
   void dispose() {
-    _ticker.dispose();
     _tiltSub?.cancel();
     _shader?.dispose();
     super.dispose();
@@ -343,17 +327,16 @@ class _ShinyState extends State<Shiny> with TickerProviderStateMixin {
       ..setFloat(1, bounds.height)
       ..setFloat(2, effectiveTilt.dx)
       ..setFloat(3, effectiveTilt.dy)
-      ..setFloat(4, _time)
-      ..setFloat(5, widget.prismatic)
-      ..setFloat(6, widget.sparkle)
-      ..setFloat(7, widget.specular)
-      ..setFloat(8, widget.diffraction)
-      ..setFloat(9, widget.style.index.toDouble())
-      ..setFloat(10, widget.sparkleShape.kind.index.toDouble())
-      ..setFloat(11, widget.sparkleShape.primary)
-      ..setFloat(12, widget.sparkleShape.secondary)
-      ..setFloat(13, widget.sparkleShape.tertiary)
-      ..setFloat(14, widget.opacity);
+      ..setFloat(4, widget.prismatic)
+      ..setFloat(5, widget.sparkle)
+      ..setFloat(6, widget.specular)
+      ..setFloat(7, widget.diffraction)
+      ..setFloat(8, widget.style.index.toDouble())
+      ..setFloat(9, widget.sparkleShape.kind.index.toDouble())
+      ..setFloat(10, widget.sparkleShape.primary)
+      ..setFloat(11, widget.sparkleShape.secondary)
+      ..setFloat(12, widget.sparkleShape.tertiary)
+      ..setFloat(13, widget.opacity);
     return shader;
   }