2 replies to this topic

[12warr12]

can anyone tell me how to make paths using mp_grid?

[turgon]

start by assigning mp_grid_create(...) to a variable, eg.

my_motion_grid = mp_grid_create(...);

Reference this variable with other mp_grid functions.

Next, block out any of the grid cells that you want to be unwalkable with functions like mp_grid_add_instances(...), etc.

For the path, start similarly:

my_path = path_add();
//you need to create a path to work with

Finally, to build the path based on the grid, use the function:

mp_grid_path(id, path, xstart, ystart, xgoal, ygoal, allowdiag);
//put my_motion_grid for id
//put my_path for path
//the other variables are self-explanatory

To make the object move on the path, use the function path_start(...).

[Nocturne]

If it helps to see examples as well as what turgon has posted, I have a whole host of them here :

http://nocturnegames.../aiexamples.htm

They are for all levels and most are fully commented so that you can learn from them.