Fix long startup time

[t-karcher]

I stopped the Godot process twice because I thought it crashed before I analyzed the code and realized what happened: Precalculating and placing 52.000 collision objects at startup takes approximately 70 seconds on my machine, without any visual clue of what's happening. 😲

I see two possible improvements for this:

1. Dynamically add new lines as needed during the game instead of placing all tiles in advance.
2. Use tiles with collision detection for the coastline only; draw the rest of the scene using larger shapes without any collision detection instead of using tiles 0 and 15.

[ChrisOKay]

70 seconds?! instant start on my macbook? Is that bug on windows side? will check with my windows laptop...

[ChrisOKay]

please check whether his happens as well if you replace the whole map by blank tiles, i.e. replace
if (float(x)/columns > riverCentre[y]-riverWidth[y]/2) && (float(x)/columns < riverCentre[y]+riverWidth[y]/2): grid_map[x].append(0) else: grid_map[x].append(1)
in scene1 by
grid_map[x].append(0)

[ChrisOKay]

peculiar.... this seems to be an issue connected to the windows version of godot? I can reprocuce the long loading time, but this does not change if everything is replaced by collision-free tiles, so it is not connected to collision.

[t-karcher]

Good news: Updating from Godot 2.1.3 to 2.1.4 reduced the load time from 70 to 12 seconds (same code as before, I didn't fetch the repo since yesterday). Will try again with Godot 3 RC2 later today.

[t-karcher]

As discussed: Removing the debugger output reduced the total load time to <3 seconds. So: Fixed. 😄