Print Page - IndexOutOfBoundsException on gluUnProject in lwjgl 2.0rc1

Title: IndexOutOfBoundsException on gluUnProject in lwjgl 2.0rc1
Post by: coasternuts on June 10, 2008, 15:04:09

Here is the code:

Code Select


private FloatBuffer outXYZ = BufferUtils.createFloatBuffer(4*4);

System.out.println( outXYZ + ":" + outXYZ.capacity() + ":" + outXYZ.position() );
GLU.gluUnProject( xyz[0], xyz[1], xyz[2],
                        modelView, proj, viewport, 
                        outXYZ );

Output:

java.nio.DirectFloatBufferU[pos=0 lim=16 cap=16]:16:0

Exception in thread "AWT-EventQueue-0" java.lang.IndexOutOfBoundsException
at java.nio.Buffer.checkIndex(Unknown Source)
at java.nio.DirectFloatBufferU.get(Unknown Source)
at org.lwjgl.util.glu.Project.__gluMultMatricesf(Project.java:180)
at org.lwjgl.util.glu.Project.gluUnProject(Project.java:351)
at org.lwjgl.util.glu.GLU.gluUnProject(GLU.java:321)
at GLCharts.Camera.projectToViewPlane(GLCanvas.java:1075)

Any ideas?

This is why I detest Buffer's. When do I rewind? When do I clear?
(I realize my buffer capacity is larger than it needs to be, I was trying to rule that out.)

Any help is much appreciated.
Thanks

Title: Re: IndexOutOfBoundsException on gluUnProject in lwjgl 2.0rc1
Post by: coasternuts on June 10, 2008, 17:47:26

The modelView, proj, and viewport needed a rewind().
Not the outXYZ.

::)

LWJGL Forum

Programming => Lightweight Java Gaming Library => Topic started by: coasternuts on June 10, 2008, 15:04:09