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Attention | Topic was automatically imported from the old Question2Answer platform. |
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Asked By | Wiskam |
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Old Version | Published before Godot 3 was released. |
Hi everyone.
I’m trying some little things on Android, especially terrain generation.
The first step I would like is filling an area with tiles, so I’m using a while loop like this:
func _UpdateGrass():
startchunk = get_node("TileMapFloor").world_to_map(Vector2(campos.x-1080, campos.y-1080))
actualchunk = startchunk
endchunk = get_node("TileMapFloor").world_to_map(Vector2(campos.x+2160, campos.y+3000))
while(actualchunk != endchunk):
if (actualchunk.x < endchunk.x):
get_node("TileMapFloor").set_cell(actualchunk.x, actualchunk.y, 0)
actualchunk = Vector2(actualchunk.x+1, actualchunk.y)
elif (actualchunk.x == endchunk.x):
get_node("TileMapFloor").set_cell(actualchunk.x, actualchunk.y, 0)
actualchunk = Vector2(startchunk.x, actualchunk.y+1)
if actualchunk == endchunk:
get_node("TileMapFloor").set_cell(actualchunk.x, actualchunk.y, 0)
pass
For the moment, it’s only one tile, I know, but I will make it more complicated once I will manage to fix a major issue.
This major issue is about the TileMap on Android, once the function _UpdateGrass() has been executed, the game is lagging and FPS drop from 50(without the TileMap) to 07, which is obviously bad. (50 isn’t really good either but well…)
I would like to find a way to optimize the game, maybe with a chunk system which is really common on randomly-generated-terrain games, but I don’t know how to proceed.
Right now, this is the area covered by this function according to a 1080*1920 resolution (everything in dark grey and light grey are covered by the area):
So that’s an area of 6 screens.
I tried to compress my tileset.tex (which is used to build the Tileset scene) using the “Compress WebP : 0.2”, the “Compress PNG” and “Compress VRAM”, but any of them make the fps higher.
Each tile of my tileset are 64x64 images like this one:
Every tips are welcome, I can give more information if needed but the main fps drop issue is due to my TileMap.
for one tip, save the reference of node and use it.
func _UpdateGrass():
var tilemap = get_node("TileMapFloor")
startchunk = tilemap.world_to_map(Vector2(campos.x-1080, campos.y-1080))
....
volzhs | 2016-05-26 12:55
Well thanks that was on my optimization list but that doesn’t affect the fps, always 07.
Wiskam | 2016-05-26 13:29
Can you post a sample project for it?
And you can use Profiler on debugger if you compile godot tool with github head, like this.
volzhs | 2016-05-26 13:48
as short, you filled 3240 x 4080 area with 64x64 tile, and it’s slow right?
volzhs | 2016-05-26 14:01
I don’t really know how to use Profiler, I guess it’s a fps graph but well, fps are staying between 05 and 08 during the test on Android with OS.get_frames_per_second().
That’s exactly this, it gets really slow when I fill this area. Smaller area (like 1080*1920) makes the fps higher, like 25 fps, which isn’t really good but this is a too small area for my project.
Unfortunately I would like to avoid sending a public sample of my project, but I think it can be reproduced easily with a 1080*1920 scene, a TileMap filled with GdScript and a FPS counter.
This is my scene tree:
And here is my GAME script, where the TileMapFloor is generated and other things.
http://pastebin.com/tXhVHTuu
Wiskam | 2016-05-26 19:21
On mobile devices, fill rate can be limited (slower to draw pixels). So the less pixels you draw, the better (yes, even transparent ones!).
Are all 4 tilemaps filled with tiles? Is your Android screen really having a 1080x1920 resolution? Does your device usually runs games smoothly?
Another thing to keep in mind, how many textures are there in your tiles?
The more different textures, the slower it will be, because the graphic card has to change states for every tile. For this, it is recommended to use atlases (one big texture with all tiles in it), so the graphic card can reuse the same texture to draw all tiles.
You can make your atlas and define sub-rects, or use image groups.
Godot Tilemaps are somehow infinite, they already have a chunk-based layout internally, so only visible chunks are drawn. You can customize the size of the chunks with the quadrant size parameter.
If you cannot provide your project, can you at least reproduce your case with a minimal project and placeholder tiles?
Note: writing pass at the end of every function is not required, unless it is empty 
Note 2: you can use tilemap.set_cellv(position, cell) to set cells, it’s faster than tilemap.set_cell(position.x, position.y, cell
Zylann | 2016-05-26 22:32
Hi Zylann, wow so many info that’s great thank you
" Note: writing pass at the end of every function is not required, unless it is empty :) "
" Note 2: you can use tilemap.set_cellv(position, cell) to set cells, it's faster than tilemap.set_cell(position.x, position.y, cell "
I deleted pass where it needs to be deleted, and replace the set_cell by set_cellv, and the game is now between 19 and 22 fps, that’s much smoother and somewhat acceptable for a minimalist game !
" Are all 4 tilemaps filled with tiles? Is your Android screen really having a 1080x1920 resolution? Does your device usually runs games smoothly? "
Only the TilemapFloor is filled by tiles, others aren’t used yet, but I planned to add some trees, rocks, and things like this so TileMapFloor will be the most filled.
My device runs games really smoothly, even 3d games like Real Racing. But I just noticed its screen isn’t 1080*1920 but 720*1280 ! Time to make the script fit to any resolution I think, my bad on this one ^^
Edit: Well I don’t think it’s worth it, I would like every devices to get the same map size so it’s good like this IMO.
" You can customize the size of the chunks with the quadrant size parameter. "
What’s the unity for the quadrant option? According to my research, quadrants are obviously like this if I understand:
But what does the value represent? I tried different value without seeing any visual changes.
" Another thing to keep in mind, how many textures are there in your tiles? "
I cleaned my tileset image, now there is only 5 textures in my tileset.tex and only 3 added to my tileset.res for the moment. But unfortunately it doesn’t save any fps.
Wiskam | 2016-05-27 10:12
(I make this assumption because my last two suggestions have almost nothing to do with fps :p)
