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DarkBASIC Discussion / Help with 3D objects

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Squall alias Leon
21
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Joined: 31st Jul 2003
Location: United Kingdom
Posted: 1st Mar 2004 15:18
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Hello. I'm having a bit of trouble animating my little sphere. <y idea is to have 4 spheres move around in a circle, as well as increasing the Y value (so is like a DNA strand thing) ... but...

I can't remember the equation to make the sphere move around in a circle. For now I would just like someone to look at my source code and let me know how to rotate it around. The Y value will have the same equation so the ball rotates constantly around the point 0,0,0, as well as rises and falls. I'm rubish at maths. Can anyone help me?
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hexGEAR
22
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Joined: 3rd Nov 2002
Location: Naytonia
Posted: 1st Mar 2004 15:55 Edited at: 1st Mar 2004 15:55
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Not 100% sure but i think this code should rotate a sphere (object 1) around the 0,0 coordinate with an angle gain of g# (1.0) and a amplitude factor of f# (5.0).

rem calculate x,z values
f# = 5.0
g# = 1.0
a# = wrapvalue(a#+g#)
x# = f# * sin(a#)
z# = f# * cos(a#)

rem update object position
position object 1,x#,y#,z#

as for the y# position, if you want the object to just move up then you just add:

y# = y# + 1.0

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Jess T
Retired Moderator
21
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Joined: 20th Sep 2003
Location: Over There... Kablam!
Posted: 2nd Mar 2004 09:18
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Or, you could use the NewXValue and NewZValue commands to do exaclty the same thing ( but without the need to know the math )...



( I know, it's exaclt the same code, but it's a bit easier to understand for some people than using sin and cos... )

Jess.


Team EOD :: Programmer/Logical Engineer/All-Round Nice Guy
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