TheGameCreators - CodeBase

Category: 3D Effects

Version: 1.0

Information

Uploaded: 29th Aug 2003 23:32

Modified: 30th Jun 2010 09:47

Author: Paul Johnston

Summary

This code will take a 32 iteration Mandelbrot set and map it onto a Dark Basic 3D matrix which you can then fly around using the mouse and arrow keys. Uses the matrix lines for effect and tile colour shading to give depth. All in less than 3k!

Full Description

========================================================== A Screaming Product Of The DARKFORGE (www.darkforge.co.uk) ========================================================== Title Mandeltrix Version 1.0 Date March 25th 2000 Files mandeltrix.dba 2598 Bytes mandeltrix.gif 44977 Bytes Programmer Richard Davey rich@fatal-design.com DB Version DarkBasic v1.02 (Registered) License Public Domain Comments This code will take a 32 iteration mandelbrot set and map it onto a Dark Basic 3D matrix which you can then fly around using the mouse and arrow keys. Uses the matrix lines for effect and tile colour shading to give depth. All in less than 3k! ========================================================== (c) www.darkforge.co.uk 2000 ==========================================================

DarkBASIC Source Code

` This code was downloaded from The Game Creators

` It is reproduced here with full permission

` http://www.thegamecreators.com

` -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

`               Mandeltrix

` -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

` By Rich Davey (rich@fatal-design.com)

` -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

` Turns a mandlebrot  set into a matrix

` you can fly around in  with the mouse

` and arrow keys!

` Music listened  to while  coding this

` Dirty  Trancing  DJ Mix by Timo Maas.

` -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

sync rate 0

sync on

hide mouse

`	Calculate the mandelbrot and place into an array

MinX#=-1.75; MaxX#=1.75; MinY#=-1.75; MaxY#=1.75

dx#=(MaxX#-MinX#)/80

dy#=(Maxy#-MinY#)/60

dim fractal#(4800)

i=0

for y=0 to 60-1

for x=0 to 80-1

pixel_color#=calc_pixel(MinX#+x*dx#,MinY#+y*dy#)*10

fractal#(i)=pixel_color#

inc i

next x

next y

`	Make a texture for the matrix (saves having a graphic image file)

x1=0; y1=0; x2=0; y2=0; shade=0; boxsize=4; gridsize=16

create bitmap 1,boxsize*gridsize,boxsize*gridsize

set current bitmap 1

for b=0 to gridsize

for c=0 to gridsize

ink rgb(255,shade,0),rgb(0,0,0)

box x1,y1,x1+boxsize+3,y1+boxsize+3

x1=x1+boxsize

shade=shade+2

next c

y1=y1+boxsize

x1=0

next b

get image 1,0,0,boxsize*gridsize,boxsize*gridsize

delete bitmap 1

`	Create the matrix and map the height according to the array

mw=3000; mh=3000; gx=80; gy=60

make matrix 1,mw,mh,gx,gy

prepare matrix texture 1,1,gridsize,gridsize

position matrix 1,0,0,0

set matrix wireframe on 1

color backdrop rgb(0,0,0)

`	Map the fractal to the matrix

i=0

for h=0 to gy-1

for w=0 to gx-1

set matrix height 1,w,h,fractal#(i)

tilepic#=fractal#(i)

if tilepic#>boxsize*gridsize then tilepic#=boxsize*gridsize

set matrix tile 1,w,h,tilepic#

inc i

next w

next h

update matrix 1

`	Set-up the camera

cx=mw/2; cy=400; cz=-200

position camera cx,cy,cz

`	The main loop

cx#=wrapvalue(cx#+mousemovey())

cy#=wrapvalue(cy#+mousemovex())

cz#=wrapvalue(cz#+mousemovez())

rotate camera cx#,cy#,cz#

if upkey()=1 then move camera 25

if downkey()=1 then move camera -25

sync

loop

`	End

`	Fractal calculation function

`	From the Dark Fractal code at www.darkforge.co.uk

function calc_pixel(ca#,cbi#)

max_iteration=32

a#=0; b#=0; iteration#=0

repeat

old_a# = a#

a# = a#*a# - b#*b# + ca#

b# = 2 * old_a#*b# + cbi#

length_z# = a#*a# + b#*b#

inc iteration#

until length_z#>4 or iteration#>max_iteration

pixel_color#=iteration#

endfunction pixel_color#

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CodeBase - Mandeltrix

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DarkBASIC Source Code

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Author Name:	Paul Johnston
CodeBase Entries:	3