public class

GLU

extends Object
java.lang.Object
   ↳ android.opengl.GLU

Class Overview

A set of GL utilities inspired by the OpenGL Utility Toolkit.

Summary

Public Constructors
GLU()
Public Methods
static String gluErrorString(int error)
Return an error string from a GL or GLU error code.
static void gluLookAt(GL10 gl, float eyeX, float eyeY, float eyeZ, float centerX, float centerY, float centerZ, float upX, float upY, float upZ)
Define a viewing transformation in terms of an eye point, a center of view, and an up vector.
static void gluOrtho2D(GL10 gl, float left, float right, float bottom, float top)
Set up a 2D orthographic projection matrix
static void gluPerspective(GL10 gl, float fovy, float aspect, float zNear, float zFar)
Set up a perspective projection matrix
static int gluProject(float objX, float objY, float objZ, float[] model, int modelOffset, float[] project, int projectOffset, int[] view, int viewOffset, float[] win, int winOffset)
Map object coordinates into window coordinates.
static int gluUnProject(float winX, float winY, float winZ, float[] model, int modelOffset, float[] project, int projectOffset, int[] view, int viewOffset, float[] obj, int objOffset)
Map window coordinates to object coordinates.
[Expand]
Inherited Methods
From class java.lang.Object

Public Constructors

public GLU ()

Public Methods

public static String gluErrorString (int error)

Return an error string from a GL or GLU error code.

Parameters
error - a GL or GLU error code.
Returns
  • the error string for the input error code, or NULL if the input was not a valid GL or GLU error code.

public static void gluLookAt (GL10 gl, float eyeX, float eyeY, float eyeZ, float centerX, float centerY, float centerZ, float upX, float upY, float upZ)

Define a viewing transformation in terms of an eye point, a center of view, and an up vector.

Parameters
gl a GL10 interface
eyeX eye point X
eyeY eye point Y
eyeZ eye point Z
centerX center of view X
centerY center of view Y
centerZ center of view Z
upX up vector X
upY up vector Y
upZ up vector Z

public static void gluOrtho2D (GL10 gl, float left, float right, float bottom, float top)

Set up a 2D orthographic projection matrix

public static void gluPerspective (GL10 gl, float fovy, float aspect, float zNear, float zFar)

Set up a perspective projection matrix

Parameters
gl a GL10 interface
fovy specifies the field of view angle, in degrees, in the Y direction.
aspect specifies the aspect ration that determins the field of view in the x direction. The aspect ratio is the ratio of x (width) to y (height).
zNear specifies the distance from the viewer to the near clipping plane (always positive).
zFar specifies the distance from the viewer to the far clipping plane (always positive).

public static int gluProject (float objX, float objY, float objZ, float[] model, int modelOffset, float[] project, int projectOffset, int[] view, int viewOffset, float[] win, int winOffset)

Map object coordinates into window coordinates. gluProject transforms the specified object coordinates into window coordinates using model, proj, and view. The result is stored in win.

Note that you can use the OES_matrix_get extension, if present, to get the current modelView and projection matrices.

Parameters
objX object coordinates X
objY object coordinates Y
objZ object coordinates Z
model the current modelview matrix
modelOffset the offset into the model array where the modelview maxtrix data starts.
project the current projection matrix
projectOffset the offset into the project array where the project matrix data starts.
view the current view, {x, y, width, height}
viewOffset the offset into the view array where the view vector data starts.
win the output vector {winX, winY, winZ}, that returns the computed window coordinates.
winOffset the offset into the win array where the win vector data starts.
Returns
  • A return value of GL_TRUE indicates success, a return value of GL_FALSE indicates failure.

public static int gluUnProject (float winX, float winY, float winZ, float[] model, int modelOffset, float[] project, int projectOffset, int[] view, int viewOffset, float[] obj, int objOffset)

Map window coordinates to object coordinates. gluUnProject maps the specified window coordinates into object coordinates using model, proj, and view. The result is stored in obj.

Note that you can use the OES_matrix_get extension, if present, to get the current modelView and projection matrices.

Parameters
winX window coordinates X
winY window coordinates Y
winZ window coordinates Z
model the current modelview matrix
modelOffset the offset into the model array where the modelview maxtrix data starts.
project the current projection matrix
projectOffset the offset into the project array where the project matrix data starts.
view the current view, {x, y, width, height}
viewOffset the offset into the view array where the view vector data starts.
obj the output vector {objX, objY, objZ}, that returns the computed object coordinates.
objOffset the offset into the obj array where the obj vector data starts.
Returns
  • A return value of GL10.GL_TRUE indicates success, a return value of GL10.GL_FALSE indicates failure.