Tried to read the docs, got confused, but would like to see a small example of using voxels. How do I make a small scene with say two voxels of a solid color? The documentation is a bit confusing, and some examples on the site uses addAssetPack which isnt documented.
But I would like to just add some colored voxels to a volume without texture and try it out a bit 
I know how to make it with meshes, but not with craft :).
@tnlogy Here’s an example I have that uses voxels.
viewer.mode=FULLSCREEN
function setup()
fill(255)
assert(OrbitViewer, "Please include Cameras (not Camera) as a dependency")
scene = craft.scene()
v=scene.camera:add(OrbitViewer,vec3(50,200,0), 500, 0, 2000)
v.camera.farPlane=10000
v.rx=30
v.ry=30
scene.voxels.blocks:addAssetPack("Blocks")
dirtgrass = scene.voxels.blocks:new("DirtGrass")
dirtgrass.setTexture(ALL, "Blocks:Dirt Grass")
water = scene.voxels.blocks:new("Water")
water.setTexture(ALL, "Blocks:Water")
snow = scene.voxels.blocks:new("Snow")
snow.setTexture(ALL, "Blocks:Snow")
grass = scene.voxels.blocks:new("Grass Top")
grass.setTexture(ALL, "Blocks:Grass Top")
scene.voxels.visibleRadius=30
scene.voxels:resize(vec3(30,1,30))
scene.voxels.coordinates = vec3(100,0,100)
offsetX=6
offsetZ=4
dirtLevel=80
grassLevel=50
waterLevel=7
val=400
m=1/val
h=craft.noise.perlin()
xx,zz=0,0
for x=1,val do
xx=xx+m
zz=0
for z=1,val do
zz=zz+m
y=math.abs(h:getValue(xx+offsetX,0,zz+offsetZ))*100//1
if y>dirtLevel then
scene.voxels:fill("Snow")
scene.voxels:block(x,y,z)
elseif y>grassLevel then
scene.voxels:fill("DirtGrass")
scene.voxels:block(x,y,z)
elseif y>waterLevel then
scene.voxels:fill("Grass Top")
scene.voxels:block(x,y,z)
else
scene.voxels:fill("Water")
scene.voxels:block(x,waterLevel,z)
end
end
end
end
function update(dt)
scene:update(dt)
end
function draw()
update(DeltaTime)
scene:draw()
text("Use one finger to rotate.",WIDTH/2,HEIGHT-25)
text("Use two fingers to move or resize.",WIDTH/2,HEIGHT-50)
end
Thanks for the code, but I wanted to know if you could make voxels of solid color or are only textured supported?
@tnology - have you tried the Craft demos - in one of them you can build your own scene and can build your own blocks, They are then stored in a grid for selection. I think it’s called block library. So if you check out the code you may be able to design your own project.
@tnlogy Heres another example that might be closer to what you want if you’re still looking for an example. I tried to keep it as small as possible. It creates a red and blue sprite in the Dropbox folder. Once the sprites are created, you can comment or remove those 2 lines.
viewer.mode=FULLSCREEN
function setup()
--create red and blue sprite in Dropbox
--comment out or remove the next 2 lines after the first run
createColor("Red",color(255,0,0))
createColor("Blue",color(0,0,255))
assert(OrbitViewer, "Please include Cameras as a dependency")
scene = craft.scene()
scene.camera:add(OrbitViewer,vec3(7,7,0), 20, 0, 10000)
scene.voxels.visibleRadius=90
scene.voxels:resize(vec3(60,1,60))
scene.voxels.coordinates = vec3(0,0,0)
--add as asset packs
scene.voxels.blocks:addAssetPack("Blocks")
scene.voxels.blocks:addAssetPack("Dropbox")
--define Red and Blue colors
temp=scene.voxels.blocks:new("Red")
temp.setTexture(ALL, "Dropbox:Red")
temp=scene.voxels.blocks:new("Blue")
temp.setTexture(ALL, "Dropbox:Blue")
--draw 6 blocks of each color
for z=1,6 do
scene.voxels:fill("Red")
scene.voxels:block(7,z*2,0)
scene.voxels:fill("Blue")
scene.voxels:block(z*2,7,0)
end
end
function update(dt)
scene:update(dt)
end
function draw()
update(DeltaTime)
scene:draw()
end
function createColor(name,col)
img=image(128,128)
setContext(img)
background(col)
setContext()
saveImage(asset.documents.Dropbox..name,img)
end
Thanks! After seeing your example and digging in some example code it made a new version
viewer.mode=FULLSCREEN
function setup()
assert(OrbitViewer, "Please include Cameras as a dependency")
scene = craft.scene() scene.camera:add(OrbitViewer,vec3(7,7,0), 20, 0, 10000)
scene.voxels.visibleRadius=90
scene.voxels:resize(vec3(60,1,60))
scene.voxels.coordinates = vec3(0,0,0)
blank = scene.voxels.blocks:new("Blank")
blank.setTexture(ALL, "Blocks:Blank White")
blank.tinted = true
--draw 6 blocks of each color
for z=1,6 do
local c = color(255, 0, 106)
scene.voxels:set(7,z*2,0,"name","Blank","color", c)
c = color(20, 0, 255)
scene.voxels:set(z*2,7,0,"name","Blank","color", c)
end
end
function update(dt)
scene:update(dt)
end
function draw()
update(DeltaTime)
scene:draw()
end
This uses tinted instead. I find the documentation for Craft a bit lacking and confusing compared to the documentation of the other parts of Codea. Thanks a lot for the help in understanding!
@tnlogy I like your version. I never used voxels:set, so something new. I agree that the docs sometimes don’t give enough info on how to use things.
Seems like you can to like this also:
scene.voxels:fill("name","Blank",
"color",color(154, 233, 80))
scene.voxels:block(7,z*2,1)
@tnlogy Heres an example of a Sierpinski cube using the voxel color code you used above. Uncomment the color lines near the bottom of the code to see different color schemes.
viewer.mode=FULLSCREEN
function setup()
ss=27 -- cube size, powers of 3 only (3, 9, 27, 81)
fill(255)
assert(OrbitViewer, "Please include Cameras (not Camera) as a dependency")
scene = craft.scene()
scene.voxels.visibleRadius=90
scene.voxels:resize(vec3(30,1,30))
scene.voxels.coordinates = vec3(ss,ss,ss)
v=scene.camera:add(OrbitViewer,vec3(ss,ss,ss), ss*3, 0, 6000)
v.rx=45
v.ry=45
blank = scene.voxels.blocks:new("Blank")
blank.setTexture(ALL,"Blocks:Blank White")
blank.tinted=true
count=0
cube(0,0,0,ss)
end
function update(dt)
scene:update(dt)
end
function draw()
update(DeltaTime)
scene:draw()
text("Cube size "..ss.."x"..ss.."x"..ss.." = "..(ss^3).." cubes",WIDTH/2,HEIGHT-25)
text("Number of cubes drawn "..count,WIDTH/2,HEIGHT-50)
text("Sierpinski cube",WIDTH/2,HEIGHT-75)
end
function cube(x,y,z,size)
local s=size//3
for x1=-s,s,s do
for y1=-s,s,s do
for z1=-s,s,s do
if (y1~=0 or z1~=0) and (x1~=0 or z1~=0) and (x1~=0 or y1~=0) then
if size~=3 then
cube(x1+x,y1+y,z1+z,s)
else
count=count+1
r=255//(x1+s+1)
g=255//(y1+s+1)
b=255//(z1+s+1)
c=color(r,g,b)
--c=color(200,200,200)
--c=color(math.random(255),math.random(255),math.random(255))
scene.voxels:set((x1+x+ss),(y1+y+ss),(z1+z+ss),
"name","Blank","color", c)
end
end
end
end
end
end
Nice!