By the way... just for the hell of it, I translated some of the
Japanese, using google.
http://temp.roxik.com/datas/max2007/index.html
Japanese text translation.... taken out of the context of the slides may
not mean much to you; however, if you watch the entire slide show, it
should come in handy.
some text from slide: 2d to 3d
................................
must make mouse position relevant to screen by imposing it on the
surface of what it touches (I think he means to say that as the mouse
moves, it should be moving the object is touches by the same degree, but
you have to check first to see what surface it is touching)
(when you look at the frames here you will see what this is referring to)
while (i < number_of_vertices) (
Vertex. X + = 3;
)
important text from slide:3d progress and conversion
....................................
Mechanism of conversion:
Rotation, rotation, rotation, movement, rotation, rotation, rotation
1.Y rotation axis
2.X rotation axis
3.Z rotation axis
4. Move Perspective
5. Perspective on Y-axis rotation
6. Viewpoint X-axis rotation
7. Viewpoint Z-axis rotation
Position on the screen
x: ? ? ?
y: ? ? ?
Point (x, y) for a spin
result_x = Math.cos (a) * x Math.sin (a) * y;
result_y = Math.sin (a) * x + Math.cos (a) * y;
? a in radians
Anthony Pace wrote:
What is the information that you know about the point? degree for
x,y? degree for x,z? degree for y,z? Is the distance you are referring
to the distance from the origin? I assume it is.
Here is a site that has a presentation in japanese (I think); yet,
just make it past the first 12 or so pointless but pretty frames, and
it will show you what you need to know visually.
http://temp.roxik.com/datas/max2007/index.html
Jer Brand wrote:
Thing is, I can download and use PV3D (and have been playing with it)
and
were I doing something for work, that's what I'd do. With my own
personal
screwing around, I'm more concerned that the math I'm using is
correct not
making things easy on myself.
As an aside, I have the AS2 version of that book from years ago.
Didn't know
if 3 was worth grabbing as well, so thanks for the rec.
Jer
On Fri, Apr 10, 2009 at 10:27 AM, Joel Stransky
<[email protected]>wrote:
Assuming PaperVision3D or Away3D don't do what you need, there is some
great
source code samples you can download from here.
http://www.friendsofed.com/book.html?isbn=1590597915
Must have book btw.
On Fri, Apr 10, 2009 at 10:52 AM, Jer Brand <[email protected]>
wrote:
Okay, so I'm taking my first little steps into 3d in actionscript
(simulated
with x/yscale for now) and needed a version of Point.polar() (thanks
Jason)
to play around with in 3 dimensions. I came up with the code below,
but
my
math skills are weak enough that I'm not sure it's functioning
correctly.
Anyone care to school me on this or confirm the math is correct?
public static function polarToCartesian3D(distance:Number,
degrees1:Number,
degrees2:Number ):Point3D
{
var a1:Number = (degrees1 * Math.PI) / 180 ;
var a2:Number = (degrees2 * Math.PI) / 180 ;
var x:Number = distance * Math.sin(a1) * Math.cos(a2) ;
var y:Number = distance * Math.sin(a1) * Math.sin(a2) ;
var z:Number = distance * Math.cos(a1) ;
return new Point3D(x, y, z) ;
}
Thanks in advance for the assist.
Jer
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--
--Joel Stransky
stranskydesign.com
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_______________________________________________
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http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
_______________________________________________
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