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155 lines
2.6 KiB
Lua
155 lines
2.6 KiB
Lua
-- title: 3D demo
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-- author: by Filippo
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-- desc: 3D demo
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-- script: lua
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-- input: gamepad
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t=0
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cx=0
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cy=0
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cz=200
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pivot={x=0,y=0,z=0}
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angle=0
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points={}
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pal={15,14,9,6,8,2,1}
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function createCube(t)
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--Init points for cube
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points={}
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local l
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l = 5 + math.abs((math.sin(t/100))*10)
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local p
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for x=-3,3 do
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for y=-3,3 do
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for z=-3,3 do
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p={x=x*l,
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y=y*l,
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z=z*l,
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c=pal[4+z]}
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table.insert(points,p)
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end
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end
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end
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end
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function createCurve(t)
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--Init points for 3d curve
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points={}
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local i=0
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local l
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l1 = math.abs(5*(math.cos(t/50)))
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for u=-70,70,15 do
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local r1 = math.cos(math.rad(u))*30
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for v=1,360,15 do
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local x = math.sin(math.rad(v))
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local y = math.cos(math.rad(v))
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p={x=x*r1,
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y=y*r1,
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z=(u/(l1+0.7)+v/5),
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c=pal[1+i%7]}
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table.insert(points,p)
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end
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i=i+1
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end
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end
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function p2d(p3d)
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local fov = 180
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local x0 = p3d.x + cx
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local y0 = p3d.y + cy
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local z0 = p3d.z + cz
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local x2d = fov * x0 / z0
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local y2d = fov * y0 / z0
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x2d = x2d + 120 --center w
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y2d = y2d + 68 --center h
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return x2d,y2d
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end
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function rotate(p3d,center,ax,ay,az)
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local a,b,c
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local a1,b1,c1
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local a2,b2,c2
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local a3,b2,c3
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local np3d={x=0,y=0,z=0,c=0}
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a = p3d.x-center.x
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b = p3d.y-center.y
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c = p3d.z-center.z
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a1 = a*math.cos(az)-b*math.sin(az)
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b1 = a*math.sin(az)+b*math.cos(az)
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c1 = c
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c2 = c1*math.cos(ay)-a1*math.sin(ay)
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a2 = c1*math.sin(ay)+a1*math.cos(ay)
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b2 = b1
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b3 = b2*math.cos(ax)-c2*math.sin(ax)
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c3 = b2*math.sin(ax)+c2*math.cos(ax)
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a3 = a2
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np3d.x=a3
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np3d.y=b3
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np3d.z=c3
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np3d.c=p3d.c
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return np3d
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end
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function zsort(p1,p2)
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return p1.z>p2.z
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end
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function TIC()
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if btn(0) then cy=cy+1 end
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if btn(1) then cy=cy-1 end
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if btn(2) then cx=cx+1 end
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if btn(3) then cx=cx-1 end
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if btn(4) then cz=cz+1 end
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if btn(5) then cz=cz-1 end
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cls(10)
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--Create points
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if(t%900<450) then
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createCube(t)
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else
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createCurve(t)
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end
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--Rotate points
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for k,p in pairs(points)do
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pr = rotate(p,pivot,
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angle,
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angle/2,
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angle/4)
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points[k] = pr
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end
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--Z Sort
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table.sort(points,zsort)
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--Draw points
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for k,p in pairs(points)do
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i,j = p2d(p)
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rect(i,j,6,6,p.c)
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end
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angle = angle + 0.05
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t=t+1
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end
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-- <TILES>
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-- 001:a000000aa0f00f0aaaaaaaaaaafaaa6aafffaaaaaafaa6aaaaaaaaaa33333333
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-- 002:a000000aa060060aaaaaaaaaaafaaa6aafffaaaaaafaa6aaaaaaaaaa33333333
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-- 016:000000000000000000000000fe96821300000000000000000000000000000000
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-- </TILES>
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-- <PALETTE>
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-- 000:140c1c44243430346d4e4a4e854c30346524d04648757161597dced27d2c8595a16daa2cd2aa996dc2cadad45edeeed6
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-- </PALETTE>
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