dermotbalson

--# Notes
--[[
This set of demos is aimed at people who have not worked with 3D before.

3D is a very, very big subject, with a lot to learn, so this set of demos can only scratch the surface, and cannot possibly explain everything there is to know.

You can simply watch the demos to see what Codea can do, but ideally,you should read up on 3D before trying to understand how the demos work, and before trying your own projects.

Also, this is not a set of "Wow, look what 3D can do" demos. If you look at them all without reading the notes,

dermotbalson

--# Notes
--[[
This project shows how to add different types of lighting to 3D scenes (in this case, a cube)

--HOW TO USE THIS PROJECT

There are a number of tabs at the top. Press on a tab to see its code.

Work through the tabs from left to right, to see the project develop

dermotbalson

--# Notes
--[[
** What is a mesh? **

A mesh is a quick way of drawing a shape. It is a set of points which create an outline (or wirefame) of an object
It is made up of triangles (groups of three points)
Triangles are used because a triangle has the smallest number of points that encloses an area
Each triangle corner is known as a VERTEX, and has a position and a colour
The colours of all the points inside the triangle are interpolated from the colours of the three corners

dermotbalson

q

dermotbalson

--# Main

displayMode(FULLSCREEN)
function setup()
    size,radius=150,15
    CreateScene()
end

function CreateScene() --size is size of 3D box

dermotbalson

--# Main


    
--# Main
displayMode(FULLSCREEN)
function setup()
    size,radius=150,15
    CreateScene()

dermotbalson

--# Main


    
--# Main
displayMode(FULLSCREEN)
function setup()
    size,radius=200,10
    CreateScene()

dermotbalson

--# Main
displayMode(FULLSCREEN)
function setup()
    size,radius=200,10
    pos=vec3(0,0,0) --assumes centre of box is (0,0,0)
    CreateScene()
    notStarted=true
end

dermotbalson

--# Main
displayMode(FULLSCREEN)
function setup()
    size,radius=200,10
    startPos=vec3(size/2,size/2,-size/2) --assumes centre of box is (0,0,0)
    CreateScene(size,radius,startPos)
    notStarted=true
end

dermotbalson

--# Main
displayMode(FULLSCREEN)
function setup()
    size,radius=200,10
    startPos=vec3(size/2,size/2,-size/2) --assumes centre of box is (0,0,0)
    CreateScene(size,radius,startPos)
    notStarted=true
end