I noticed there is a difference in the culling between volumes and scene.voxels
I’ve built a pretty satisfying noise tree for “cave” generation, I’m trying to create a generated side scrolling runner generated by noise, but my problem currently is that I cannot utilize the voxels engine as a 2D Surface because of the current culling behavior, to help explain what I mean, i added two screenshots, one of the initial tryout and one of an example project show casing the problem.
Blocks on the edges of the voxel system do not get rendered, and as a result, the terrain looks empty from a side view, comparing it with a normal volume entity (orange blocks), these are rendered as expected.
Now I realize this is probably for performance purposes, as the terrains are not meant to be viewed from the side,but can I somehow control this?
Another option I considered was to try to build a noise tree that flattens the closest z-indices, but I failed at that.
Here is the code of the example project:
— Main
-- VolumeSet
function makeScene()
-- Create the scene
scene = craft.scene()
-- Move the main camera
scene.camera.position = vec3(0, 0, -10)
-- Adjust the scene lighting
scene.sun.rotation = quat.eulerAngles(45,0,45)
scene.ambientColor = color(90,90,90)
-- Turn on fog and set distances and color
--scene.fogEnabled = true
--scene.fogNear = 10
--scene.fogFar = 50
--scene.fogColor = color(255,255,255)
-- Get the sky material and change the sky and horizon colors
local skyMaterial = scene.sky.material
skyMaterial.sky = color(44, 158, 241)
skyMaterial.horizon = color(121, 144, 226)
viewer = scene.camera:add(OrbitViewer, vec3(0,10,0), 10, 5, 1200)
end
function makeBlocks()
scene.voxels.blocks:addAssetPack("Blocks")
local basic = scene.voxels.blocks:new("Basic")
basic.setTexture(ALL, "Blocks:Cotton Blue")
local red = scene.voxels.blocks:new("Red")
red.setTexture(ALL, "Blocks:Cotton Red")
end
function makeVol()
local e = scene:entity()
local v = e:add(craft.volume, 16, 32, 4)
cx, cy, cz = v:size()
b = v:blockID('Red')
floor = craft.noise.const(b)
air = craft.noise.const(0)
v:set(0,0,0, v:blockID('Red'))
v:setWithNoise(noiseTree())
scene.voxels:resize(vec3(28, 1, 28))
scene.voxels.coordinates = vec3(0,0,0)
--scene.voxels:setWithNoise(noiseTree())
scene.voxels:generate(readProjectTab("NoiseTree"), "generateTerrain")
end
function setup()
makeScene()
makeBlocks()
makeVol()
end
function update(dt)
-- Update the scene (including physics, voxels and other systems)
scene:update(dt)
end
function draw()
update(DeltaTime)
-- Draw the scene (must be done within the draw function)
scene:draw()
end
-- Noise tree
seed = 0
function generateTerrain(chunk)
cx, cy, cz = chunk:size()
air = craft.noise.const(0)
floor = craft.noise.const(chunk:blockID('Basic'))
local n = noiseTree()
chunk:setWithNoise(n)
end
function invert(n)
local i = craft.noise.invert()
i:setSource(0, n)
local a = craft.noise.add()
a:setSource(0, craft.noise.const(1))
a:setSource(1, i)
return a
end
local function turb(n, f, s , p)
local t = craft.noise.turbulence()
t:setSource(0, n)
t.frequency = f or 6
t.seed = s or math.random(0, 10000)
t.power = p or 5.6
return t
end
-- Cache noise values in 2D space to reduce expensive computations
function cache2D(chunk, input)
local cache = craft.noise.chunkCache2D(chunk)
cache:setSource(0, input)
return cache
end
function split(a, b, p)
local s = craft.noise.select()
s:setSource(0, a)
s:setSource(1, b)
s:setSource(2, craft.noise.gradient())
s:setBounds(p, 1.0)
return s
end
function checker(n)
local s = craft.noise.select()
s:setSource(0, craft.noise.const(0))
s:setSource(1, craft.noise.const(1))
s:setSource(2, n)
s:setBounds(0.8, 1.0)
return s
end
function mult(n, m)
local mn = craft.noise.multiply()
mn:setSource(0, n)
mn:setSource(1, m)
return mn
end
function mapp(a, b, n)
local s = craft.noise.select()
s:setSource(0, a)
s:setSource(1, b)
s:setSource(2, n)
s:setBounds(0.5, 10)
return s
end
function bounds(n)
depth = 1
local s = craft.noise.select()
s:setSource(0, n)
s:setSource(1, floor)
s:setSource(2, craft.noise.gradient())
s:setBounds(1.0 - depth / (cy + 0.0), 1.0)
local s2 = craft.noise.select()
s2:setSource(0, floor)
s2:setSource(1, s)
s2:setSource(2, craft.noise.gradient())
s2:setBounds(1.0 - (cy - 2) / (cy + 0.0), 1.0)
return s2
end
function noiseTree()
local n = craft.noise.gradient()
local zero = craft.noise.const(0)
local n2 = invert(n)
n = split(n, n2, 0.5)
n = turb(n, 0.5, 2, 0.2)
n = mult(n, craft.noise.const(1.5))
n = invert(n)
n = checker(n)
n = mapp(air, floor, n)
n = bounds(n)
return n
end