Realistic Oceans Using Mesh Deformation!

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#85

To make that work, you will need to call your gerstnertransform() function like my computeDisplacement() function. (see my previous reply)

You only need to return the height.

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#86

I donā€™t think Iā€™m implementing that function correctly at all. I donā€™t know what Iā€™m supposed to do with it.

These are the functions:

function GerstnerWave(SamplePosition,Wavelength,Direction,Steepness,Gravity,SampleTick)
	local k = (2 * math.pi) / Wavelength
	local a = Steepness/k
	local d = Direction.Unit
	local c = math.sqrt(Gravity / k)
	local f = k * d:Dot(Vector2.new(SamplePosition.X,SamplePosition.Z)) - c * SampleTick
	local cosF = math.cos(f)

	--Displacement Vectors
	local dX = (d.X * (a * cosF))
	local dY = a * math.sin(f)
	local dZ = ( d.Y * (a * cosF))
	return Vector3.new(dX,dY,dZ)
end

function wavefunction(v) -- This is used for the bones, and it works correctly
	local WorldPos = v.WorldPosition - Vector3.new(root.Position.X,0,root.Position.Y)
	local Wave1 = GerstnerWave(WorldPos,90,Vector2.new(.5,.5),.4,4,SyncModule:Time()*timemodifier*1.2)
	local Wave2 = GerstnerWave(WorldPos,120,Vector2.new(.8,.2),.1,15,SyncModule:Time()*timemodifier*1)
	local Wave3 = GerstnerWave(WorldPos,400,Vector2.new(.7,0),.015,1000,SyncModule:Time()*timemodifier*0.02)
	local Wave4 = GerstnerWave(WorldPos,400,Vector2.new(0,1),.01,1000,SyncModule:Time()*timemodifier*0.026)
	local TotalDisplacement = Wave1+Wave2+Wave3+Wave4
	v.Transform = CFrame.new(TotalDisplacement)
end

function gerstnertransform(v)
	local WorldPos = v
	local Wave1 = GerstnerWave(WorldPos,90,Vector2.new(.5,.5),.4,4,SyncModule:Time()*timemodifier*1.2)
	local Wave2 = GerstnerWave(WorldPos,120,Vector2.new(.8,.2),.1,15,SyncModule:Time()*timemodifier*1)
	local Wave3 = GerstnerWave(WorldPos,300,Vector2.new(.7,0),.015,1000,SyncModule:Time()*timemodifier*0.02)
	local Wave4 = GerstnerWave(WorldPos,300,Vector2.new(0,1),.01,1000,SyncModule:Time()*timemodifier*0.026)
	local TotalDisplacement = Wave1+Wave2+Wave3+Wave4
	return Vector2.new(TotalDisplacement.X,TotalDisplacement.Z)
end

Here is the swimming height offset detector

rs:Connect(function()
	plane.Caustics.OffsetStudsU = -root.Position.X * 0.75
	plane.Caustics.OffsetStudsV = -root.Position.Z * 0.75
	plane.WaterTexture.OffsetStudsU = -root.Position.X * 1.2
	plane.WaterTexture.OffsetStudsV = -root.Position.Z * 1.2
	
	plane.Position = Vector3.new(root.Position.X,plane.Position.Y,root.Position.Z)
	
	for _,v in pairs(bones) do -- this whole loop works the way its expected to, albeit its really performance heavy.
		wavefunction(v)
	end
	
	if root.Position.Y < getHeight(gerstnertransform(Vector3.new(root.Position.X,plane.Position.Y,root.Position.Z))) then
		print('underwater')
	end
	
end)

First of all, without editing it, thereā€™s an error because Vector3 and Vector2 are not the same, and I donā€™t know how the two vectors are supposed to relate when it comes to the formulae you guys provided.
Secondly, I donā€™t really know if Iā€™m implementing it correctly ā€“ Iā€™m 99.9% certain that Iā€™m extremely off.
Edit: Thirdly, it seems like Iā€™m not even anchoring the plane to my character correctly about half the time. My movement displaces the waves sometimes.

1 Like
#87

Do you have a working example of this? I am doing something similar with scenery elements on land, only rendering ones within a certain distance from the camera, but I think your method would be more efficient and allow me more density of objects.

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#88

Hi! Sorry if this counts as necroposting but, how do I make the ocean bigger? Iā€™m trying to make a fairly big map but itā€™s bigger than the ocean.

#89

Check out my example of an ocean with 4 ocean planes in the original post.

#90

So I did the ocean and it worked fine for a while, but recently itā€™s caused an IMMENSE amount of lag out of nowhereā€¦ deleted it and the lag was gone. Any reason this could be happeningā€¦? Any fixes?

#91

Thatā€™s the nature of it. Skinned meshes with this amount of bones and movement arenā€™t always perfectly performant.

#92

I suppose, I only ask because it wasnā€™t nearly this awful before, the performance was barely even affected on account of my friends experiencesā€¦ but now itā€™s unreasonably laggy unfortunately

#94

is there any method to get the cframe at a specific point? its extremely important for making objects float

#95

this yields an error
image
even after fixing the bug (the order of the transform and point), it wont give me accurate results

#96

you have to understand that the gernster wave formula returns x and z offsets in addition to y, so getting the y level at a certain point is going to be really difficult as the wave not only rises and lowers, but moves side to side.

#97

Iā€™ve managed to narrow down the problem but Iā€™m absolutely stumped where to go here:

i have the exact position of the 3 xā€™s, i have the x and z of the red X, how can i calculate the red Xā€™s y position so that it will be on the plane created by the black circles (the plane is the blue polygon)

Image

1 Like
#98

If anyone is interested in making water float on the mesh heres what worked for me:

Find 4 points to make your point fit inside of them, narrow it down to 3 (so that your on the same side of the triangle), use interpolation between those 3 points to get the exact y value

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#99

can u make soo the wave follows the player with bone offset and uv texture offset

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#100

How are you able to place planes next to each other? When i do it the whole script does not work. But if there is only one plane it works fine. How do i fix this?

#101

You just duplicate the entire plane model (all of it) and move it, shouldnā€™t be any issues. Check my WaveExample-4Plane.rbxl model out in the post for an example

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#103

By the way, refresh is broken.

#104

Any waves I duplicate are out-of sync. Whereas yours are fine. Solution?

https://gyazo.com/9c130880c9575423a712fce8af2d78ee

P.S I followed the layout of your 4 wave and just added 2 of my own, 5 and 6 (which are both out of sync from the rest)

#105

Hello! This hasnā€™t seemed to work, the ocean does not move on the duplicated one, it only moves on the original ocean. How do I fix this?

#106

You have to use the module I coded in order for it to work. There is a script in StarterPlayer that initializes the model as a wave, you would have to do the same for other wave models for it to work