grids

[Wild_West]

I'm trying to make a game with grid movement and grid based attacking but try as I may I can't seem to figure out even how to get the grid set right in the room.
Can anyone direct me to or else provide a good simple for an idiot like me to follow tutorial on how to use ds_grid functions.

 

[Tthecreator]

This maybe?

 

[Nux]

(watch this to better understand the fundamentals of grids)

(watch this whole series because it shows you how to create a map from which you can collide with)

 

[Wild_West]

(watch this to better understand the fundamentals of grids)

(watch this whole series because it shows you how to create a map from which you can collide with)

I already watched all the stuff on youtube I could find, that's why I'm asking here.
I have HeartBeast's book too.
I mean I get how they work, it's just the tutorials don't really help with what I'm trying to do specifically, which yeah if I understood it well enough I wouldn't need an exact tutorial but I guess I'll have to ho over them again.

 

[Wild_West]

(watch this to better understand the fundamentals of grids)

(watch this whole series because it shows you how to create a map from which you can collide with)

Maybe if you could just help me with the math. I mean if I wanted to make a grid that just sets itself to the roo's height and width how would I figure out how many cells that is? since I'm not defining it with just a number like in the docs example

 

[Nux]

how would I figure out how many cells that is?

Oh, that's pretty simple; just divide the room height and width by the "width" of each cell (usually 32 pixels) to get the number of cells along each dimension

ds_grid_create(floor(room_width / 32), floor(room_height/32));

Edit: infact, he even goes over this in his tutorial:

Spoiler: image

 

[Wild_West]

Oh, that's pretty simple; just divide the room height and width by the "width" of each cell (usually 32 pixels) to get the number of cells along each dimension

ds_grid_create(floor(room_width / 32), floor(room_height/32));

Edit: infact, he even goes over this in his tutorial:

Spoiler: image

View attachment 6526

Oh right, duh. I guess it has been a while since I looked at that one.
Alright so here's another quick question then, how do I draw the grid on screen? I just tried a loop but it just crashed my whole system. I wanted to see how many cells I actually got from the division so I could access the right positions.

 

[Wild_West]

Oh, that's pretty simple; just divide the room height and width by the "width" of each cell (usually 32 pixels) to get the number of cells along each dimension

ds_grid_create(floor(room_width / 32), floor(room_height/32));

Edit: infact, he even goes over this in his tutorial:

Spoiler: image

View attachment 6526

Nevermind , I really am an idiot. I can just use the room editor grid and count the cross sections to find out the number of cells I'll have for any given size.

 

[Nux]

Oh nononono
NEVER draw from your grid. always create a background image or place tiles at the positions on start-up; the time taken to draw all of a grid's cells would increase parabolically.
You're calling a draw cycle a few thousand times!