Hey guys, I have recently been trying to learn to code in 3d. I’ve been reading @Ignatz’s ebook. Real helpful. I’ve mastered 3d cubes, and now want to move on to spheres. I tried the link in the ebook. It won’t work. Can anyone help?.
Thanks.
you can try http://jmv38.comze.com/CODEAbis/files/3D-tutorial-v0.txt
It is a fairly old program, but I’ve just checked it still works.
I think that was the same link as in the ebook. I won’t work for me. I try to load the page and it keeps saying the sever is unresponsive. (Or something in that nature)
@Jmv38 @Progrmr235 I tried the above link and didn’t have any problems. I loaded the code and went thru the tutorial.
I tried the link again, still the same problem. I don’t know @dave1707 and @Jmv38, it’s probably just a glitch with my iPad if you said it works for you guys
@Progrmr235 Not sure why you’re having trouble. I tried the above link on my iPad 1 running the old version 5.1.1 iOS code and didn’t have any problems.
@Progrmr235 - try this link for that code instead.
https://gist.github.com/dermotbalson/26518774e821ff7023bb
Also see this recent discussion.
http://codea.io/talk/discussion/5594/sphere-generator/p1
Actually, I think it’s a problem with my internet severer @dave1707. I tried the same link on a PC. And thanks @ignatz, your link works.
Still a bit confused, but whatever. I’ll figure it out eventually
I have one more question. Do I need to understand shaders to understand 3d spheres?
not if you use @Jmv38’s code
(but don’t be too scared of shaders, they are fun - I have an ebook on them, too)
yes
Then I will probably have a lot more questions in the forseeable future
a fun thing you can do with spheres is to create a 3D sky that wraps all around
description and image link:
http://coolcodea.wordpress.com/2013/12/05/139-3d-sky/
That does sound cool, but I want to make a space type game. Where you fly though stars and avoid Obsticals and stuff
'function setup()
camX = 0
camY = 0
camZ = 200
lookX = 0
lookY = 0
lookZ = -2000
Cube = true
Cu={}
end
function newCube()
cu = {}
d = 7.5
cu.cr = {
vec3(-d,-d,d),--1. bottom left corner
vec3(d,-d,d),--2. bottom right corner
vec3(-d,d,d),--3. top left corner
vec3(d,d,d), --4. top right coner
vec3(-d,-d,-d),--5. bottom back left
vec3(d,-d,-d),--6. bottom back right
vec3(-d,d,-d),--7. bottom top right
vec3(d,d,-d)}--8. bottom top left
cu.c = {color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255),
color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255),
color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255),
color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255),
color(255, 255, 255, 255),color(255, 255, 255, 255),
color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255),
color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255),
color(255, 255, 255, 255),color(255, 255, 255, 255) ,color(255, 255, 255, 255),color(255, 255, 255, 255),
color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255),
color(255, 255, 255, 255),color(255, 255, 255, 255),color(255, 255, 255, 255)}
cu.cl = {cu.c[1],cu.c[2],cu.c[3],cu.c[4],cu.c[5],cu.c[6],cu.c[7] ,cu.c[8],cu.c[9],cu.c[10],cu.c[11],cu.c[12],cu.c[13],cu.c[14],cu.c[15],cu.c[16],cu.c[17],cu.c[18],cu.c[19],cu.c[20],
cu.c[21],cu.c[22],cu.c[23],cu.c[24],cu.c[25],cu.c[26],cu.c[27],cu.c[28],cu.c[29],cu.c[30],cu.c[31],cu.c[32],cu.c[33],cu.c[34],cu.c[35],cu.c[36]}
cu.v ={
cu.cr[1], cu.cr[2],cu.cr[3],cu.cr[3],cu.cr[4],cu.cr[2], -- front
cu.cr[3],cu.cr[1],cu.cr[7],cu.cr[7],cu.cr[5],cu.cr[1], -- left side
cu.cr[4],cu.cr[2],cu.cr[6],cu.cr[6],cu.cr[8],cu.cr[4], -- right side
cu.cr[6],cu.cr[8],cu.cr[7],cu.cr[7],cu.cr[5],cu.cr[6],-- back
cu.cr[6],cu.cr[5],cu.cr[2],cu.cr[2],cu.cr[1],cu.cr[5], -- top
cu.cr[7],cu.cr[4],cu.cr[3],cu.cr[4],cu.cr[7],cu.cr[8]}
cu.x = math.random(-1200,1200)
cu.y = math.random(-1200,1200)
cu.z = -2000
cu.RX = 0
cu.RY = 0
cu.RZ = 0
cu.rX = 3
cu.rY = 3
cu.rZ = 0
m = mesh()
m.vertices = cu.v
m.colors = cu.cl
table.insert(Cu,cu)
end
-- This function gets called once every frame
function draw()
-- This sets a dark background color
background(0)
newCube()
for i,cu in pairs(Cu) do
cu.z = cu.z + 7
perspective()
camera(camX,camY,camZ,lookX,lookY,lookZ)
pushMatrix()
translate(cu.x,cu.y,cu.z)
rotate(cu.RX,1,0,0)
rotate(cu.RY,0,1,0)
rotate(cu.RZ,0,0,1)
m:draw()
popMatrix()
if cu.z >= 0 then
table.remove(Cu,i)
end
-- This sets the line thickness
cu.RX = cu.RX + cu.rX
cu.RY = cu.RY + cu.rY
cu.RZ = cu.RZ + cu.rZ
end
-- Do your drawing here
end'
You’ll understand what I mean if you run this code
ah, well you might prefer this kind of thing then
2D: http://coolcodea.wordpress.com/2013/08/16/101-simulating-an-asteroid-field/
3D: http://coolcodea.wordpress.com/2013/08/19/102/
PS when posting code, you need three ~ (not two) before and after the code, without any quotes. See how I fixed your post above.
Yeah. But another thing I want to do is have two kinds of Obsticals. One that that you can hit and one that uses an AI to try to hit you. And I want to make both types of Obsticals a sphere shape
Spheres are a bit boring, you need to make them bumpy, like this
http://codea.io/talk/discussion/4517/3d-asteroids-for-that-scary-in-your-face-feeling/p1
I have code if you’d like it
I see you’re point. (And I liked the music and am impressed with how you used lighting affects). Still, I probably have to get comfortable with spheres before I can make anything like that