Cube coordinates are stored in vertices array in Cube.java.
Rotating effect is achieved via model view matrix modification
(glTranslate and glRotate commands). Original vertex data isn't
modified.
On Jun 17, 8:30 pm, quill wrote:
> Hi all,
> I'm modifying Kube(api demo) to a game, does anyone wh
Thank you Nightwolf.
I want to choose the Kube when I touch on the Kube face in order to
rotate Kube.
My idea is:
1. to get vertices of Kube to compose a polygon(2D);
2. judge if the touch point locates in the polygon;
As you said, the cube coordinates is not modified, so I use
gluunproject() to c
I haven't used it yet, but look at:
http://developer.android.com/reference/android/opengl/GLU.html#gluUnProject(float,%20float,%20float,%20float[],%20int,%20float[],%20int,%20int[],%20int,%20float[],%20int)
I think that may help you.
On Jun 18, 4:21 am, quill wrote:
> Thank you Nightwolf.
> I
Yes, you are on the right track. :-)
However, i could not get gluUnProject to work. I wrote my own:
http://groups.google.com/group/android-developers/browse_frm/thread/9d2bf53e3a798cb6/c722628acdf6e2d9
(see messages no. 6 and 8)
On Jun 18, 4:21 am, quill wrote:
> Thank you Nightwolf.
> I wa
It seems that you already know more than me on this subject.
May be there is a sense to use simple approach.
Treat cube as a circle and test whether touch point is in that circle
or not. Of course it's less accurate and you need to define cube
center somehow.
On Jun 18, 12:21 pm, quill wrote:
>
Hi Boston,
I failed with both GLU.gluUnProject or your gluUnProject.
Maybe there is something wrong with my polygon coordinates. In fact,
the polygon is just a square, which is the face of a small cube. I get
the coordinates from GLWord.mVertexBuffer(such as mVertexBuffer.get(0)/
65536.0), is this
The gluUnProject should just be used to translate the coordinates of
your finger on the screen (x1,y1,z1), where z1 is 0...1, to a 3d
coordinate in your Kube space (x2,y2,z2).
You calculate it for z1=0 and z1=1, which gives you two coordinates in
Kube space, a line:
unproject(x1,y1,0) --> (Sx2,Sy
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