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{ Hono } from \"https://esm.sh/hono@latest\";\nimport { blob } from \"https://esm.town/v/std/blob\";\nimport { serveFile } from \"https://esm.town/v/std/utils/index.ts\";\n\ninterface Emanation {\n id: string;\n origin: { x: number; y: number; z: number };\n wavelength: number;\n amplitude: number;\n frequency: number;\n decay: number;\n color: { r: number; g: number; b: number; a: number };\n metadata: Record;\n timestamp: number;\n}\n\ninterface EmanationField {\n id: string;\n resolution: number;\n width: number;\n height: number;\n grid: number[][];\n emanations: Emanation[];\n interference: boolean;\n created: number;\n}\n\ninterface DiffusionRequest {\n sourceX: number;\n sourceY: number;\n intensity: number;\n wavelength?: number;\n shape?: \"gaussian\" | \"radial\" | \"fractal\" | \"voronoi\";\n metadata?: Record;\n}\n\n// Emanation generation engine\nclass EmanationEngine {\n private fields: Map = new Map();\n\n createField(\n id: string,\n width: number,\n height: number,\n resolution: number,\n ): EmanationField {\n const field: EmanationField = {\n id,\n width,\n height,\n resolution,\n grid: Array(Math.ceil(height / resolution))\n .fill(null)\n .map(() => Array(Math.ceil(width / resolution)).fill(0)),\n emanations: [],\n interference: true,\n created: Date.now(),\n };\n this.fields.set(id, field);\n return field;\n }\n\n emanate(fieldId: string, req: DiffusionRequest): Emanation {\n const field = this.fields.get(fieldId);\n if (!field) throw new Error(`Field ${fieldId} not found`);\n\n const wavelength = req.wavelength || 32;\n const decay = 0.015;\n const id = Math.random().toString(36).slice(2);\n\n const emanation: Emanation = {\n id,\n origin: { x: req.sourceX, y: req.sourceY, z: 0 },\n wavelength,\n amplitude: req.intensity,\n frequency: 1 / wavelength,\n decay,\n color: this.intensityToColor(req.intensity),\n metadata: req.metadata || {},\n timestamp: Date.now(),\n };\n\n field.emanations.push(emanation);\n\n // Propagate through grid based on shape\n const shape = req.shape || \"gaussian\";\n this.propagateEmanation(field, emanation, shape);\n\n return emanation;\n }\n\n private propagateEmanation(\n field: EmanationField,\n e: Emanation,\n shape: string,\n ) {\n const gx = Math.floor(e.origin.x / field.resolution);\n const gy = Math.floor(e.origin.y / field.resolution);\n const maxDist = e.wavelength * 3;\n\n for (let y = 0; y < field.grid.length; y++) {\n for (let x = 0; x < field.grid[y].length; x++) {\n const dx = (x - gx) * field.resolution;\n const dy = (y - gy) * field.resolution;\n const dist = Math.sqrt(dx * dx + dy * dy);\n\n if (dist > maxDist) continue;\n\n let value = 0;\n {\n switch (shape) {\n case \"gaussian\":\n value = e.amplitude *\n Math.exp(-((dist * dist) / (2 * e.wavelength * e.wavelength)));\n break;\n case \"radial\":\n value = e.amplitude * Math.max(0, 1 - dist / maxDist);\n break;\n case \"fractal\":\n {\n const frac = this.fractalNoise(\n dx / e.wavelength,\n dy / e.wavelength,\n );\n value = e.amplitude * frac * Math.exp(-dist / e.wavelength);\n }\n break;\n case \"voronoi\":\n {\n const voro = Math.sin(dist / e.wavelength) *\n Math.cos(dist / (e.wavelength * 0.5));\n value = e.amplitude * voro;\n }\n break;\n }\n }\n\n if (field.interference) {\n field.grid[y][x] += value;\n } else {\n field.grid[y][x] = Math.max(field.grid[y][x], value);\n }\n }\n }\n }\n\n private fractalNoise(x: number, y: number, octaves: number = 4): number {\n let value = 0;\n let amplitude = 1;\n let frequency = 1;\n let max = 0;\n\n for (let i = 0; i < octaves; i++) {\n value += amplitude * Math.sin(x * frequency) * Math.cos(y * frequency);\n max += amplitude;\n amplitude *= 0.5;\n frequency *= 2;\n }\n return value / max;\n }\n\n private intensityToColor(\n intensity: number,\n ): { r: number; g: number; b: number; a: number } {\n const normalized = Math.min(1, intensity);\n return {\n r: Math.floor(255 * normalized),\n g: Math.floor(128 * (1 - normalized * 0.5)),\n b: Math.floor(255 * (1 - normalized)),\n a: normalized,\n };\n }\n\n getField(id: string): EmanationField | undefined {\n return this.fields.get(id);\n }\n\n listEmanations(fieldId: string): Emanation[] {\n return this.fields.get(fieldId)?.emanations || [];\n }\n\n mergeFields(id1: string, id2: string, outputId: string): EmanationField {\n const f1 = this.fields.get(id1);\n const f2 = this.fields.get(id2);\n if (!f1 || !f2) throw new Error(\"Source fields not found\");\n\n const output = this.createField(\n outputId,\n Math.max(f1.width, f2.width),\n Math.max(f1.height, f2.height),\n Math.min(f1.resolution, f2.resolution),\n );\n\n // Combine grids\n for (let y = 0; y < Math.min(f1.grid.length, f2.grid.length); y++) {\n for (let x = 0; x < Math.min(f1.grid[y].length, f2.grid[y].length); x++) {\n output.grid[y][x] = f1.grid[y][x] + f2.grid[y][x];\n }\n }\n\n // Merge emanations\n output.emanations = [...f1.emanations, ...f2.emanations];\n\n return output;\n }\n\n transformField(\n fieldId: string,\n operation: \"blur\" | \"sharpen\" | \"invert\" | \"normalize\",\n ): void {\n const field = this.fields.get(fieldId);\n if (!field) throw new Error(`Field ${fieldId} not found`);\n\n switch (operation) {\n case \"blur\":\n this.blurGrid(field.grid);\n break;\n case \"sharpen\":\n this.sharpenGrid(field.grid);\n break;\n case \"invert\":\n this.invertGrid(field.grid);\n break;\n case \"normalize\":\n this.normalizeGrid(field.grid);\n break;\n }\n }\n\n private blurGrid(grid: number[][]): void {\n const kernel = [\n [0.0625, 0.125, 0.0625],\n [0.125, 0.25, 0.125],\n [0.0625, 0.125, 0.0625],\n ];\n\n for (let y = 1; y < grid.length - 1; y++) {\n for (let x = 1; x < grid[y].length - 1; x++) {\n let sum = 0;\n for (let ky = -1; ky <= 1; ky++) {\n for (let kx = -1; kx <= 1; kx++) {\n sum += grid[y + ky][x + kx] * kernel[ky + 1][kx + 1];\n }\n }\n grid[y][x] = sum;\n }\n }\n }\n\n private sharpenGrid(grid: number[][]): void {\n const kernel = [[0, -1, 0], [-1, 5, -1], [0, -1, 0]];\n\n for (let y = 1; y < grid.length - 1; y++) {\n for (let x = 1; x < grid[y].length - 1; x++) {\n let sum = 0;\n for (let ky = -1; ky <= 1; ky++) {\n for (let kx = -1; kx <= 1; kx++) {\n sum += grid[y + ky][x + kx] * kernel[ky + 1][kx + 1];\n }\n }\n grid[y][x] = sum;\n }\n }\n }\n\n private invertGrid(grid: number[][]): void {\n const max = Math.max(...grid.flat());\n for (let y = 0; y < grid.length; y++) {\n for (let x = 0; x < grid[y].length; x++) {\n grid[y][x] = max - grid[y][x];\n }\n }\n }\n\n private normalizeGrid(grid: number[][]): void {\n const flat = grid.flat();\n const min = Math.min(...flat);\n const max = Math.max(...flat);\n const range = max - min;\n\n for (let y = 0; y < grid.length; y++) {\n for (let x = 0; x < grid[y].length; x++) {\n grid[y][x] = range === 0 ? 0 : (grid[y][x] - min) / range;\n }\n }\n }\n}\n\n// Hono app setup\nconst app = new Hono();\nconst engine = new EmanationEngine();\n\n// REST endpoints\napp.post(\"/fields\", (c) => {\n const { id, width = 800, height = 600, resolution = 10 } = c.req.query();\n const field = engine.createField(\n String(id),\n Number(width),\n Number(height),\n Number(resolution),\n );\n return c.json(field);\n});\n\napp.get(\"/fields/:id\", (c) => {\n const field = engine.getField(c.req.param(\"id\"));\n if (!field) return c.json({ error: \"Field not found\" }, 404);\n return c.json(field);\n});\n\napp.post(\"/fields/:id/emanate\", async (c) => {\n const id = c.req.param(\"id\");\n const body = (await c.req.json()) as DiffusionRequest;\n const emanation = engine.emanate(id, body);\n return c.json(emanation);\n});\n\napp.post(\"/fields/:id/transform\", async (c) => {\n const id = c.req.param(\"id\");\n const { operation } = (await c.req.json()) as { operation: string };\n engine.transformField(id, operation as any);\n return c.json({ status: \"ok\", operation });\n});\n\napp.post(\"/fields/merge\", async (c) => {\n const { id1, id2, outputId } = (await c.req.json()) as {\n id1: string;\n id2: string;\n outputId: string;\n };\n const merged = engine.mergeFields(id1, id2, outputId);\n return c.json(merged);\n});\n\napp.get(\"/fields/:id/emanations\", (c) => {\n const emanations = engine.listEmanations(c.req.param(\"id\"));\n return c.json(emanations);\n});\n\n// WebSocket for real-time field updates\napp.get(\n \"/fields/:id/stream\",\n Hono.upgradeWebSocket((c) => {\n const fieldId = c.req.param(\"id\");\n const field = engine.getField(fieldId);\n\n if (!field) {\n return {\n onOpen: () => {},\n onMessage: () => {},\n onClose: () => {},\n };\n }\n\n return {\n onOpen: (evt: any) => {\n const ws = evt.target;\n ws.send(JSON.stringify({ type: \"init\", field }));\n },\n\n onMessage: async (message: string, evt: any) => {\n try {\n const req = JSON.parse(message) as DiffusionRequest;\n const emanation = engine.emanate(fieldId, req);\n evt.target.send(\n JSON.stringify({ type: \"emanation\", data: emanation }),\n );\n } catch (e) {\n evt.target.send(JSON.stringify({ type: \"error\", error: String(e) }));\n 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Code