GLHelper (common 0.0.1 API)

java.lang.Object
- com.serenegiant.glutils.es1.GLHelper

public final class GLHelper
extends java.lang.Object

OpenGL|ES用のヘルパークラス

Constructor Summary

Constructors
Constructor and Description

GLHelper()

Constructors
Constructor and Description
`GLHelper()`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`checkGlError(javax.microedition.khronos.opengles.GL10 gl, java.lang.String op)` OpenGL\|ESのエラーをチェックしてlogCatに出力する
`static void`	`checkGlError(java.lang.String op)` OpenGL\|ESのエラーをチェックしてlogCatに出力する
`static void`	`checkLocation(int location, java.lang.String label)` Checks to see if the location we obtained is valid.
`static int`	`createTextureWithTextContent(java.lang.String text)`
`static void`	`deleteTex(javax.microedition.khronos.opengles.GL10 gl, int hTex)` delete specific texture
`static void`	`deleteTex(int hTex)` delete specific texture
`static java.lang.String`	`gluErrorString(int error)` Return an error string from a GL or GLU error code.
`static void`	`gluLookAt(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(float left, float right, float bottom, float top)` Set up a 2D orthographic projection matrix
`static void`	`gluPerspective(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. gluProject transforms the specified object coordinates into window coordinates using model, proj, and view.
`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.
`static int`	`initTex(javax.microedition.khronos.opengles.GL10 gl, int texTarget, int filter_param)` テクスチャ名を生成(GL_TEXTURE0のみ)
`static int`	`initTex(int texTarget, int filter_param)` テクスチャ名を生成, テクスチャユニットはGL_TEXTURE0, クランプ方法はGL_CLAMP_TO_EDGE
`static int`	`initTex(int texTarget, int texUnit, int min_filter, int mag_filter, int wrap)` テクスチャ名を生成
`static int`	`loadTextureFromResource(android.content.Context context, int resId)`
`static void`	`logVersionInfo()` Writes GL version info to the log.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - GLHelper
```
public GLHelper()
```
- Method Detail
  - checkGlError
```
public static void checkGlError(java.lang.String op)
```
    OpenGL|ESのエラーをチェックしてlogCatに出力する
    
    Parameters:
    
    op -
  - checkGlError
```
public static void checkGlError(javax.microedition.khronos.opengles.GL10 gl,
                                java.lang.String op)
```
    OpenGL|ESのエラーをチェックしてlogCatに出力する
    
    Parameters:
    
    gl -
    
    op -
  - initTex
```
public static int initTex(int texTarget,
                          int filter_param)
```
    テクスチャ名を生成, テクスチャユニットはGL_TEXTURE0, クランプ方法はGL_CLAMP_TO_EDGE
    
    Parameters:
    
    texTarget -
    
    filter_param - テクスチャの補完方法を指定, min/mag共に同じ値になる, GL_LINEARとかGL_NEAREST
    
    Returns:
  - initTex
```
public static int initTex(int texTarget,
                          int texUnit,
                          int min_filter,
                          int mag_filter,
                          int wrap)
```
    テクスチャ名を生成
    
    Parameters:
    
    texTarget -
    
    texUnit - テクスチャユニット, GL_TEXTURE0...GL_TEXTURE31
    
    min_filter - テクスチャの補間方法を指定, GL_LINEARとかGL_NEAREST
    
    mag_filter - テクスチャの補間方法を指定, GL_LINEARとかGL_NEAREST
    
    wrap - テクスチャのクランプ方法, GL_CLAMP_TO_EDGE
    
    Returns:
  - initTex
```
public static int initTex(javax.microedition.khronos.opengles.GL10 gl,
                          int texTarget,
                          int filter_param)
```
    テクスチャ名を生成(GL_TEXTURE0のみ)
    
    Parameters:
    
    gl -
    
    texTarget -
    
    filter_param - テクスチャの補間方法を指定 GL_LINEARとかGL_NEAREST
    
    Returns:
  - deleteTex
```
public static void deleteTex(int hTex)
```
    delete specific texture
  - deleteTex
```
public static void deleteTex(javax.microedition.khronos.opengles.GL10 gl,
                             int hTex)
```
    delete specific texture
  - loadTextureFromResource
```
public static int loadTextureFromResource(android.content.Context context,
                                          int resId)
```
  - createTextureWithTextContent
```
public static int createTextureWithTextContent(java.lang.String text)
```
  - checkLocation
```
public static void checkLocation(int location,
                                 java.lang.String label)
```
    Checks to see if the location we obtained is valid. GLES returns -1 if a label could not be found, but does not set the GL error.
    Throws a RuntimeException if the location is invalid.
  - logVersionInfo
```
public static void logVersionInfo()
```
    Writes GL version info to the log.
  - gluErrorString
```
public static java.lang.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.
  - gluLookAt
```
public static void gluLookAt(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:
    
    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
  - gluOrtho2D
```
public static void gluOrtho2D(float left,
                              float right,
                              float bottom,
                              float top)
```
    Set up a 2D orthographic projection matrix
    
    Parameters:
    
    left -
    
    right -
    
    bottom -
    
    top -
  - gluPerspective
```
public static void gluPerspective(float fovy,
                                  float aspect,
                                  float zNear,
                                  float zFar)
```
    Set up a perspective projection matrix
    
    Parameters:
    
    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).
  - gluProject
```
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.
  - gluUnProject
```
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.

Class GLHelper

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

GLHelper

Method Detail

checkGlError

checkGlError

initTex

initTex

initTex

deleteTex

deleteTex

loadTextureFromResource

createTextureWithTextContent

checkLocation

logVersionInfo

gluErrorString

gluLookAt

gluOrtho2D

gluPerspective

gluProject

gluUnProject