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   "cell_type": "code",
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   "source": [
    "from k3d import K3D\n",
    "from math import sin, cos, pi\n",
    "\n",
    "width = height = 20\n",
    "view_matrix = (\n",
    "    7.0,  5.0, -5.0, 0.0,\n",
    "    0.0,  7.0,  7.0, 5.0,\n",
    "    7.0, -5.0,  5.0, 0.0,\n",
    "    0.0,  0.0,  0.0, 1.0\n",
    ")\n",
    "\n",
    "def f(x, y):\n",
    "    return sin(float(x) / width * pi * 2.0), cos(float(y) / height * pi * 2.0)\n",
    "\n",
    "colors = (0xFF0000, 0x00FF00) * width * height\n",
    "vectors = [[f(x, y) for y in range(height)] for x in range(width)]\n",
    "\n",
    "plot = K3D()\n",
    "plot += K3D.vectors_fields(vectors, colors, view_matrix=view_matrix)\n",
    "plot.display()"
   ]
  }
 ],
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