change so that grid can be coarser for less loading time

plotting.py

@@ -19,6 +19,11 @@ def plot(kvl_file):
             curves = st.multiselect('Select TOP Key to Visualize surface, SED keys to project', keys)
             inst = st.select_slider('Select Time Instance', t_iter)
             gridno=st.checkbox('Grid on')
+            if gridno:
+                kgrid=st.number_input('Higher the number, coarser the grid',value=2,placeholder=2)
+            else: 
+                kgrid=2
+
             time = int(inst) / dt
             sampleno = len(kvl_file['TOP']) / nt
             start_index = int(time * sampleno)
@@ -36,15 +41,15 @@ def plot(kvl_file):
                 y_data = np.arange(z_data.shape[0])
                 
                 # Create meshgrid for surface
-                xGrid, yGrid = np.meshgrid(x_data, y_data)
-                xRev, yRev = np.meshgrid(y_data, x_data)
+                xGrid, yGrid = np.meshgrid(x_data[::kgrid], y_data[::kgrid])
+                xRev, yRev = np.meshgrid(y_data[::kgrid], x_data[::kgrid])
 
                 # Create figure
                 fig = go.Figure(data=[go.Surface(x=x_data, y=y_data, z=z_data,surfacecolor=intensity_data,colorscale='Rainbow')])
                 if gridno: #grid on 
-                    for i,j,k in zip(xGrid,yGrid,z_data):
+                    for i,j,k in zip(xGrid,yGrid,z_data[::kgrid,::kgrid]):
                         fig.add_trace(go.Scatter3d(x=i,y=j,z=k, mode='lines', line=dict(color='black', width=1,)))
-                    for i,j,k in zip(xRev,yRev,z_data.T):
+                    for i,j,k in zip(xRev,yRev,z_data[::kgrid,::kgrid].T):
                         fig.add_trace(go.Scatter3d(x=j,y=i,z=k, mode='lines', line=dict(color='black', width=1,)))
         
                 # Update the layout of the figure