Bowen Kuang Bowen Kuang - 4 years ago 180
JSON Question

Read Json to build meshes in Unity

I am trying to use LitJson to read data from a Json file and build meshes in Unity. Part of the Json data are polygons which take the form of 2-D arraies(like:

u'polygon0': [[2, 18.2], [6, 18], [4, 20]],u'polygon1': [[10, 18], [15, 18], [12, 15]],u'polygon2': [[4.746822657198926, 14.948995797109236],[4.500912085144255, 10.506835760070645],[15.500912085144254,10.506835760070645],[16.6, 15.3]]
).

Now I am able to read from a specific json file by:

//read rectangular
for (int k = 0; k < 4; k++)
{
pol4 npol = new pol4();//pol4 is float(4,2)
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 2; j++)
{
npol.pol[i, j] = float.Parse(data[10 + k][i][j].ToString());//data is LitJson.JsonData type

}
}
it.pol4s.Add(npol);

}


But I want to read any number of any sides polygons. So I defined a list to store these:
public List<float[,]> polygons =new List<float[,]>();
and try to read them as a list of 2-D array:

int polyIndex = 0;
while (true){
string index = polyIndex.ToString();
string key = "polygon" + index;
polyIndex++;
try
{
Debug.Log(data[key]);//data is LitJson.JsonData type
}
catch (Exception e)
{
Console.WriteLine("{0} Exception caught.", e);
break;
}
JsonData poly =data[key];
int polySize = poly.Count;
float[,] po = new float[polySize, 2];

for (int i = 0; i < polySize; i++)
{
po[i,0] = float.Parse(poly[i][0].ToString);
po [i, 1] = float.Parse(poly [i] [1].ToString);
}
it.polygons.Add (po);
}


And I get the following error:The best overloaded method match for "float.Parse(string)" has some invalid arguments;
full errors:error message

I wonder how can I get this coordinates stored.

Answer Source

Replace

        po[i,0] = float.Parse(poly[i][0].ToString);
        po [i, 1] = float.Parse(poly [i] [1].ToString);

with

        po[i,0] = float.Parse(poly[i][0].ToString());
        po [i, 1] = float.Parse(poly [i] [1].ToString());

i.e. invoke the ToString method.

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