Conception for a weather mod

[PilzAdam]

Hello everyone!
What do you think about this laggy way to create rain?
http://ompldr.org/vZjVxcQ/weather.zip
Start/stop rain with the command /rain

[Echo]

Nice effect!
Wouldn't it be enough if it would rain in a smaller cube around the player? Else you get strange moiree / repeating effects.

[qwrwed]

It's good, but typing /rain a second time doesnt seem to stop it, and like Echo said, there are lots of repeating effects.

[rubenwardy]

Is it sprites in 3d, or a image animation overlay?

image animation overlay is less laggy:

http://minetest.net/forum/viewtopic.php ... 583#p33583

[leo_rockway]

PilzAdam, you rock.

[VanessaE]

Very impressive! It looks like you're basically replacing all air nodes with an animated rain node. I might suggest adding a small random number to each raindrop's initial X/Z position to get rid of the moire pattern. Also, I would suggest a smoother animation - at least 4x as many frames (but with the same length of time for the loop).

[Echo]

Is it possible to detect the clouds in the sky? I never tried. If it is possible, then there should be rain only direct under the clouds.

[PilzAdam]

Is it possible to detect the clouds in the sky? I never tried. If it is possible, then there should be rain only direct under the clouds.

Its not possible.

[PilzAdam]

Nice effect!
Wouldn't it be enough if it would rain in a smaller cube around the player? Else you get strange moiree / repeating effects.

Thats not easy. But I see what i can do.

[PilzAdam]

It's good, but typing /rain a second time doesnt seem to stop it, and like Echo said, there are lots of repeating effects.

It needs some time.

[PilzAdam]

Is it sprites in 3d, or a image animation overlay?

image animation overlay is less laggy:

http://minetest.net/forum/viewtopic.php ... 583#p33583

But how to do this in lua?

[PilzAdam]

Very impressive! It looks like you're basically replacing all air nodes with an animated rain node. I might suggest adding a small random number to each raindrop's initial X/Z position to get rid of the moire pattern. Also, I would suggest a smoother animation - at least 4x as many frames (but with the same length of time for the loop).

This is not a mod so the graphics are very basic.

[rubenwardy]

Is it sprites in 3d, or a image animation overlay?

image animation overlay is less laggy:

http://minetest.net/forum/viewtopic.php ... 583#p33583

But how to do this in lua?

isnt there a minetest.drawimageonscreen or similar command?

[4aiman]

In the minecraft rain and snow effects seems to be just a textures on a 4 plains which "surround" player.
So I suggest following:
- create 4 entities 1x2x0 (plains)
- apply to each of them some animated rain texture on the one side and tranparent texture on the other (see "animated torches" mos)
- make this entities to face the player (see "snow" mod)
- re-place that entities around player on every server time tick
- coordinates should be like so: {-0.5, 0.5, -0.5} for the 1st one, {0.5, 0.5, -0.5} for the second, {-0.5, 0.5, 0.5} for the 3rd and {0.5, 0.5, 0.5} for the last one:

Code: Select all

 __ __ __
|  |  |  |
|__|/\|__|
| /|PP|\ |
|_\|__|/_|
|  |\/|  |
|__|__|__|

I tried to draw 9 blocks, PP = player and the diagonal lines = 4 entities, placed in rhombus-like shape.

This way every player would see animated side of his "raining entity" and would "see" empty "back side" of the other players' "raining entities".

I tried to do this on my own, but I'm not so good at lua or modding for minetest...
Someone with skill may check above things to make lightweight but working weather.

[PilzAdam]

This is a good idea!
I will code it when I have some time (within the next week).

[4aiman]

I managed to add entity in the player's position, but:
1. animation for texture didn't work, when I write smth like this:

Code: Select all

    textures = {             
             {name="rainanim.png"},
             {name="rainanim.png", animation={type="vertical_frames", aspect_w=48, aspect_h=48, length=3.0}},
},

2. I ended up in need to add "owner" property, so that if player goes offline, entities would be destroyed.

[PilzAdam]

There is no animation for entity. You have to change the object properties in on_step().

[4aiman]

Sorry for stupid question, but....
Do I need to change textures property in the on_step() event or I should use set_properties and pass textures table as a parameter?

[PilzAdam]

Sorry for stupid question, but....

There are no stupid questions, just stupid answers ;-)

Do I need to change textures property in the on_step() event or I should use set_properties and pass textures table as a parameter?

You cant set the animation as a parameter in set_properties(). You need to setup a timer in on_step() like this:

Code: Select all

timer = 0,
on_step = function(self, dtime)
    self.timer = self.timer + dtime
    if self.timer < 0.25 then 
        return
    end
    self.timer = 0
end,

After this you set the next texture of the animation:

Code: Select all

local animation_frames = 8
[...]
timer = 0,
anim_step = 0,
on_step = function(self, dtime)
    self.timer = self.timer + dtime
    if self.timer < 0.25 then 
        return
    end
    self.timer = 0
    self.anim_step = (self.anim_step+1)%animation_frames
    self.object:set_properties({
        textures = {
            "rain_inside_animated.png^[verticalframe:"..16*animation_frames..":"..self.anim_step},
            "rain_outside_animated.png^[verticalframe:"..16*animation_frames..":"..self.anim_step},
        },
    })
end,

Note: This is untested code.

[Likwid H-Craft]

Hey Adam I made my own rain textures for my, texture pack so if you like use it you can:D

[4aiman]

It's better to wait for approval of particle spawners

[Casimir]

@PilzAdam
I tested that code, and it works so far that it is an animation. But it does not show a complete picture but only one horizontal line stretched. To be precise the lines 1 to 8.

It seems to me that those lines are incomplete:

Code: Select all

        textures = {
            "rain_inside_animated.png^[verticalframe:"..16*animation_frames..":"..self.anim_step},
            "rain_outside_animated.png^[verticalframe:"..16*animation_frames..":"..self.anim_step},
        },

( replace }, at the end of the lines with .."]" to make it work)

edit:
Found it. It has to be

Code: Select all

"rain_inside_animated.png^[verticalframe:"..animation_frames..":"..self.anim_step.."]"

[chase programer]

i want lava rain for fun =0 [img]dog[/img]

[nomohakon]

i want lava rain for fun =0 [img]dog[/img]

I guess acid rain will be better.

[Josh]

Having rain in the game would be a refreshing idea, expecially the players who have heatwaves in their countries
We could also have lightning which could set fire to trees. And storms which damage the land.
Lightning and storms are probably impossible now. But later on it could be possible