refactor(environment): replace grass with terrain-mesh ghibli shader

src/world/grass/grassConfig.ts

@@ -1,33 +1,20 @@
-import { TERRAIN_COLORS } from "@/data/world/terrainConfig";
-
 export const GRASS_CONFIG = {
   enabled: true,
   chunkSize: 20,
   loadRadius: 30,
   unloadRadius: 34,
   updateInterval: 250,
-  sampleStep: 1.15,
-  jitter: 0.42,
-  bladesPerCell: 2,
-  maxBladesPerChunk: 720,
-  bladeWidth: 0.12,
-  minBladeHeight: 0.42,
-  maxBladeHeight: 0.82,
-  surfaceOffset: 0.06,
-  baseColor: "#1f3512",
-  windBendStrength: 0.42,
-  windNoiseScale: 0.09,
+  baseBladesPerChunk: 2600,
+  bladeWidth: 0.08,
+  maxBladeHeight: 0.36,
+  randomHeightAmount: 0.25,
+  surfaceOffset: 0.025,
+  windNoiseScale: 0.9,
+  baldPatchModifier: 2.5,
+  falloffSharpness: 0.35,
+  heightNoiseFrequency: 12,
+  heightNoiseAmplitude: 3,
+  maxBendAngle: 22,
 } as const;
 
-export const GRASS_SURFACE_KEYS = new Set([
-  "grass1",
-  "grass2",
-  "grass3",
-] as const);
-
-export function getGrassTipColor(surfaceKey: string | null): string {
-  if (surfaceKey === "grass1") return TERRAIN_COLORS.grass1.grassTipColor;
-  if (surfaceKey === "grass2") return TERRAIN_COLORS.grass2.grassTipColor;
-  if (surfaceKey === "grass3") return TERRAIN_COLORS.grass3.grassTipColor;
-  return TERRAIN_COLORS.grass1.grassTipColor;
-}
+export const GRASS_COLORS = ["#84C66B", "#67B058", "#A3CA5B"] as const;