Melancholic:
No problem! Here are my matrix sites:
http://www.gamespp.com/tutorials/matrixTransformationTutorial.html
http://www.euclideanspace.com/maths/algebra/matrix/index.htm
http://wally.cs.iupui.edu/n351/3D/matrix.html
the rest is pretty simple. I will upload the code. note. not very well commented. If you have any questions please post on DarkGDK post. because this is the DarkBASIC post, and its in DarkGDK.
Wait my first attempt was in DarkBASIC. I will upload both sources.
the DarkBASIC one doesn't move or rotate the camera. it just deals with a wire frame object and matrix rotations.
Here is the post that got me startedd on this stuff:
http://forum.thegamecreators.com/?m=forum_view&t=159888&b=10
here's a wiki on 3D Projection:
http://en.wikipedia.org/wiki/3D_projection
i thought i had more bookmarked. i think there are some more on that other thread. If you have more questions you can ask or google it(that's what i did
)
here's the dbc source:
sync on
sync rate 0
set display mode 800,600,32
dim v(1000, 2)
dim poly(1000, 2)
dim obj(1000, 1000)
dim objpos(1000, 2)
dim objangle#(1000, 2)
dim camx(0)
dim camy(0)
dim camz(0)
dim CamAng#(2)
dim MatrixScale(3, 3)
dim MatrixRotation#(4, 4)
dim MatrixPosition(3, 3)
camx(0) = 0 : camY(0) = 10 : camz(0) = -50
ink rgb(255,255,255),rgb(0,0,255)
CreateBox(0, 0, 10, 0)
SetMatrixRotationX(0, 180.0)
obj = 0
px = 0
py = 0
pz = 0
do
print screen fps()
camAngleX# = wrapvalue(camAngleX#+mousemovey()/3.0)
camAngleY# = wrapvalue(camAngleY#+mousemovex()/3.0)
RotateCamera(camAngleX#, camAngleY#, 0.0)
xang# = xang# + 1
if leftkey() then px = px - 1
if rightkey() then px = px + 1
if upkey() then py = py + 1
if downkey() then py = py - 1
PositionObject(0, px, py, pz)
RotateObjectZ(0, wrapvalue(zang#))
SetMatrixRotationY(0, xang#)
for x=0 to 12
Draw_Poly(0, x)
next x
sync
cls
loop
function PositionObject(obj, x, y, z)
objpos(obj, 0) = x
objpos(obj, 1) = y
objpos(obj, 2) = z
endfunction
function RotateObjectZ(obj, ang#)
ObjAngle#(obj, 2) = ang#
endfunction
function RotateObjectX(obj, ang#)
ObjAngle#(obj, 0) = ang#
endfunction
function GetVertexScreenX(x#, z#, camx, camz)
if camz ! z#
hw = 400
zdist# = 300/tan(31)
screenX = ( ( (x# - camx) * zdist# ) / (z# - camz) ) + hw
else
screenX = -1
endif
endfunction screenX
function GetVertexScreenY(y#, z#, camy, camz)
if camz ! z#
hh = 300
zdist# = 300/tan(31)
screenY = hh - ( ( (y# - camy) * zdist# ) / (z# - camz) )
else
screenY = -1
endif
endfunction screenY
function CreateBox(obj, x, y, z)
rem front face vertices
v(0, 0) = -5 : v(0, 1) = -5 : v(0, 2) = -5
v(1, 0) = -5 : v(1, 1) = 5 : v(1, 2) = -5
v(2, 0) = 5 : v(2, 1) = 5 : v(2, 2) = -5
v(3, 0) = 5 : v(3, 1) = -5 : v(3, 2) = -5
rem from face polys
poly(0, 0) = 0 : poly(0, 1) = 1 : poly(0, 2) = 2
poly(1, 0) = 3 : poly(1, 1) = 2 : poly(1, 2) = 1
rem left face vertices
v(4, 0) = -5 : v(4, 1) = -5 : v(4, 2) = 5
v(5, 0) = -5 : v(5, 1) = 5 : v(5, 2) = 5
rem left face polys
poly(3, 0) = 4 : poly(3, 1) = 5 : poly(3, 2) = 1
poly(4, 0) = 0 : poly(4, 1) = 5 : poly(4, 2) = 1
rem back face vertices
v(6, 0) = 5 : v(6, 1) = -5 : v(6, 2) = 5
v(7, 0) = 5 : v(7, 1) = 5 : v(7, 2) = 5
rem back face polys
poly(5, 0) = 6 : poly(5, 1) = 7 : poly(5, 2) = 5
poly(6, 0) = 4 : poly(6, 1) = 7 : poly(6, 2) = 5
rem right face vertices
poly(7, 0) = 3 : poly(7, 1) = 2 : poly(7, 2) = 7
poly(8, 0) = 6 : poly(8, 1) = 2 : poly(8, 2) = 7
rem top face polys
poly(9, 0) = 1 : poly(9, 1) = 5 : poly(9, 2) = 7
poly(10, 0) = 2 : poly(10, 1) = 5 : poly(10, 2) = 7
rem bottom face polys
poly(11, 0) = 4 : poly(11, 1) = 0 : poly(11, 2) = 6
poly(12, 0) = 3 : poly(12, 1) = 6: poly(12, 2) = 4
poly(13, 0) = 0 : poly(13, 1) = 3 : poly(13, 2) = 6
obj(obj, 0) = 0 : obj(obj, 1) = 1
for w=2 to 12
obj(obj, w) = w+1
next w
objpos(obj, 0) = 10 : objPos(obj, 1) = 5 : objPos(obj, 2) = 10
endfunction
function RotateCamera(xang#, yang#, zang#)
CamAng#(0) = xang#
CamAng#(1) = yang#
CamAng#(2) = zang#
endfunction
function Draw_Poly(obj,p)
p = obj(obj, p)
dim screenPos(2, 1)
obax# = objangle#(obj, 0) : obay# = objangle#(obj, 1) : obaz# = objangle#(obj, 2)
objX = objpos(obj, 0) : objY = objpos(obj, 1) : objZ = objpos(obj, 2)
camAngX# = CamAng#(0) : camAngY# = CamAng#(1) : camAngZ# = CamAng#(2)
camx = camx(0)
camy = camz(0)
camz = camy(0)
for v=0 to 2
ovx = v(poly(p, v), 0)
ovy = v(poly(p, v), 1)
ovz = v(poly(p, v), 2)
vx# = (ovx*MatrixRotation#(1,1)) + (ovy*MatrixRotation#(2,1)) + (ovz*MatrixRotation#(3,1))
vy# = (ovz*MatrixRotation#(1,2)) + (ovy*MatrixRotation#(2,2)) + (ovz*MatrixRotation#(3,2))
vz# = (ovx*MatrixRotation#(1,3)) + (ovy*MatrixRotation#(2,3)) + (ovz*MatrixRotation#(3,3))
screenPos(v, 0) = GetVertexScreenX(vx#,vz#,camx(0),camz(0))
screenPos(v, 1) = GetVertexScreenY(vy#,vz#,camy(0),camz(0))
next v
DrawWire(screenPos(0,0),screenPos(0,1),screenPos(1,0),screenPos(1,1),screenPos(2,0),screenPos(2,1))
endfunction
function SetMatrixRotationY(Obj, angle#)
angle# = wrapvalue(angle#)
s# = sin(angle#)
c# = cos(angle#)
MatrixRotation#(1, 1) = c# : MatrixRotation#(2, 1) = 0 : MatrixRotation#(3, 1) = 0-s#
MatrixRotation#(1, 2) = 0 : MatrixRotation#(2, 2) = 1 : MatrixRotation#(3, 2) = 0
MatrixRotation#(1, 3) = s# : MatrixRotation#(2, 3) = 0 : MatrixRotation#(3, 3) = c#
endfunction
function SetMatrixRotationX(Obj, angle#)
angle# = wrapvalue(angle#)
s# = sin(angle#)
c# = cos(angle#)
MatrixRotation#(1, 1) = 1 : MatrixRotation#(2, 1) = 0 : MatrixRotation#(3, 1) = 0
MatrixRotation#(1, 2) = 0 : MatrixRotation#(2, 2) = c# : matrixRotation#(3, 2) = 0-s#
MatrixRotation#(1, 3) = 0 : MatrixRotation#(2, 3) = s# : MatrixRotation#(3, 3) = c#
endfunction
function SetMatrixRotationZ(Obj, angle#)
angle# = wrapvalue(angle#)
s# = sin(angle#)
c# = cos(angle#)
MatrixRotation#(1, 1) = c# : MatrixRotation#(2, 1) = 0-s# : MatrixRotation#(3, 1) = 0
MatrixRotation#(1, 2) = s# : MatrixRotation#(2, 2) = c# : matrixRotation#(3, 2) = 0
MatrixRotation#(1, 3) = 0 : MatrixRotation#(2, 3) = s# : MatrixRotation#(3, 3) = 1
endfunction
function DrawWire(ax,ay,bx,by,cx,cy)
line ax,ay,bx,by
line ax,ay,cx,cy
line bx,by,cx,cy
endfunction
I don't think there is a single comment in that
sorry. I just pretty throughly commented my c++ source. I will post that on the darkGDK board if you want it(i don't want to put c++ stuff up here. i will get mods mad ;P lol)
That dbc isn't great stuff, but it's where kinda where i started(er well a more primitive form)
New Site! Check it out \/
