Water flow push items
Posted: Sun Sep 23, 2012 03:40I've worked almost 25 hours on this code doing a lot of experiments and such, and this is what i've come up with:
There are a few bugs:
Idea: Water source makes items float
CODERS! i need your help! we can finally have flowing water pushing items around in minetest!
Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.
- Code: Select all
on_step = function(self, dtime)
local p = self.object:getpos()
local nn = minetest.env:get_node(p).name
if nn == "default:lava_source" or nn == "default:lava_flowing" then
self.object:remove()
-- minetest.sound_play("hiss")
end
if minetest.registered_nodes[nn].walkable then
leaniancy = 0.3
negative_lean = -0.3
blockx = math.floor(p.x+0.5)
blockz = math.floor(p.z+0.5)
blocky = math.floor(p.y+0.5)
--test x inside of block
if p.x - blockx >= leaniancy then
setx = blockx + 0.7
end
if p.x - blockx <= negative_lean then
setx = blockx - 0.7
end
if p.x - blockx < leaniancy and p.x - blockx > negative_lean then
setx = blockx
end
--test z inside of block
if p.z - blockz >= leaniancy then
setz = blockz + 0.7
end
if p.z - blockz <= negative_lean then
setz = blockz - 0.7
end
if p.z - blockz < leaniancy and p.z - blockz > negative_lean then
setz = blockz
end
--if setz and sety is the same as the block position, push the blocks up, otherwise don't change y
if setz == blockz and setx == blockx then
sety = blocky + 0.7
end
if setz ~= blockz or setx ~= blockx then
sety = blocky
end
self.object:setacceleration({x=0,y=0,z=0})
self.object:setvelocity({x=0,y=0,z=0})
self.object:setpos({x=setx,y=sety,z=setz})
end
--BEGINNING OF MASSIVE FLOW TEST
--X + 1
local node_param2 = minetest.env:get_node(p).param2
local check_below = {x=p.x, y=p.y - 1, z=p.z}
local see_if_solid_below = minetest.env:get_node(check_below).name
--print(see_if_solid_below)
local in_front_x = {x=p.x + 1, y=p.y, z=p.z}
local next_to_x = {x=p.x + 0.35, y=p.y, z=p.z}
local test_if_less_x = minetest.env:get_node(in_front_x).param2
local see_if_water_x = minetest.env:get_node(in_front_x).name
local check_to_stop_x = minetest.env:get_node(next_to_x).name
--if the flowing water block's param2 is lower than the current one, set the acceleration for +x
if nn == "default:water_flowing" and test_if_less_x < node_param2 then
if nn == "default:water_flowing" and see_if_water_x == "default:water_flowing" then
self.object:setacceleration({x=1,y=0,z=0})
end
end
--if the item is inside of flowing water then check if there is a solid block in front of it or if it is in air, check if tehre is more air below it
if check_to_stop_x ~= "default:water_flowing" and nn == "default:water_flowing" or check_to_stop_x == "air" and see_if_solid_below == "air" then
self.object:setacceleration({x=0,y=-10,z=0})
end
-- If node is not registered or node is walkably solid and stop it from stopping flowing items
noder = minetest.env:get_node(p).name
p.y = p.y - 0.3
local nn = minetest.env:get_node(p).name
if not minetest.registered_nodes[nn] or minetest.registered_nodes[nn].walkable and noder ~= "default:water_flowing" then
if self.physical_state then
print("stopping")
self.object:setvelocity({x=0, y=0, z=0})
self.object:setacceleration({x=0, y=0, z=0})
self.physical_state = false
self.object:set_properties({
physical = false
})
end
else
if not self.physical_state then
self.object:setvelocity({x=0,y=0,z=0})
self.object:setacceleration({x=0, y=-10, z=0})
self.physical_state = true
self.object:set_properties({
physical = true
})
end
end
end,
There are a few bugs:
- There is no checking if the node next to it is walkable when pushing the items out of blocks, so if the item pusher pushes it into another block, it will keep passing them back in forth (EXAMPLE) instead should just push them +1 on the y axis
- This actually only goes + on the X axis right now, but it works sort of well so far
- If you throw an item directly on the edge of a walkable node, then it will just slide across it (EXAMPLE)
Idea: Water source makes items float
CODERS! i need your help! we can finally have flowing water pushing items around in minetest!