GlClearDepth: Difference between revisions

From QB64 Phoenix Edition Wiki
Jump to navigation Jump to search
(Created page with "'''_glClearDepth:''' specify the clear value for the depth buffer {{PageSyntax}} :: SUB _glClearDepth (BYVAL depth AS DOUBLE) :: void '''_glClearDepth'''(GLdouble {{Parameter|depth}}); :: void '''_glClearDepthf'''(GLfloat {{Parameter|depth}}); ; depth : Specifies the depth value used when the depth buffer is cleared. The initial value is 1. {{PageDescription}} '''_glClearDepth''' specifies the depth value used by {{KW|_glClear}} to clear the depth buffer. Values s...")
 
No edit summary
Line 1: Line 1:
'''_glClearDepth:''' specify the clear value for the depth buffer
{{DISPLAYTITLE:_glClearDepth}}
The '''_glClearDepth'''' statement specifies the clear value for the depth buffer.




{{PageSyntax}}
{{PageSyntax}}
: '''_glClearDepth''' GLclampd {{Parameter|depth}}


:: SUB _glClearDepth (BYVAL depth AS DOUBLE)
:: void '''_glClearDepth'''(GLdouble {{Parameter|depth}});
:: void '''_glClearDepthf'''(GLfloat {{Parameter|depth}});


; depth
{{PageParameters}}
: Specifies the depth value used when the depth buffer is cleared. The initial value is 1.
* OpenGL is using its own set of variable types to describe its command parameters.
* Use the following table to find the respective QB64 [[Variable Types]].
{{TextStart}}
  '''OpenGL'''    |    '''C/C++'''        |        '''QB64'''
------------+------------------+----------------------
GLenum      |  unsigned int    |  [[_UNSIGNED]] [[LONG]]
GLboolean  |  unsigned char  |  [[_UNSIGNED]] [[_BYTE]]
GLbitfield  |  unsigned int    |  [[_UNSIGNED]] [[LONG]]
GLbyte      |  signed char    |  [[_BYTE]]
GLshort    |  short          |  [[INTEGER]]
GLint      |  int            |  [[LONG]]
GLsizei    |  int            |  [[LONG]]
GLubyte    |  unsigned char  |  [[_UNSIGNED]] [[_BYTE]]
GLushort    |  unsigned short  |  [[_UNSIGNED]] [[INTEGER]]
GLuint      |  unsigned int    |  [[_UNSIGNED]] [[LONG]]
GLfloat    |  float          |  [[SINGLE]]
GLclampf    |  float          |  [[SINGLE]]
GLdouble    |  double          |  [[DOUBLE]]
GLclampd    |  double          |  [[DOUBLE]]
GLvoid      |  void            |  no parameters used
{{TextEnd}}




{{PageDescription}}
{{PageDescription}}
* OpenGL's documentation is available in several places, so we won't reproduce it here for another time.
* The full description for this command can be found at [https://docs.microsoft.com/en-us/windows/win32/opengl/glcleardepth Microsoft Docs] and is also valid for QB64 usage.


'''_glClearDepth''' specifies the depth value used by {{KW|_glClear}} to clear the depth buffer. Values specified by '''_glClearDepth''' are clamped to the range [0, 1].
{{PageNotes}}
The type of the {{Parameter|depth}} parameter was changed from GLclampf to GLfloat for '''_glClearDepthf''' and from GLclampd to GLdouble for '''_glClearDepth'''. This change is transparent to user code.
{{PageUseWith}}
{{KW|_glGet}} with argument {{KW|_GL_DEPTH_CLEAR_VALUE}}


{{PageSeeAlso}}
{{PageSeeAlso}}
* [[_GL|SUB _GL]]


[[_GL|SUB _GL]]
{{KW|_glClear}}


{{PageNavigation}}


{{PageCopyright}}
[[Category:Final]]

Revision as of 10:19, 14 July 2022

The _glClearDepth' statement specifies the clear value for the depth buffer.


Syntax

_glClearDepth GLclampd depth


Parameters

  • OpenGL is using its own set of variable types to describe its command parameters.
  • Use the following table to find the respective QB64 Variable Types.
  OpenGL     |     C/C++        |        QB64
 ------------+------------------+----------------------
 GLenum      |  unsigned int    |  _UNSIGNED LONG
 GLboolean   |  unsigned char   |  _UNSIGNED _BYTE
 GLbitfield  |  unsigned int    |  _UNSIGNED LONG
 GLbyte      |  signed char     |  _BYTE
 GLshort     |  short           |  INTEGER
 GLint       |  int             |  LONG
 GLsizei     |  int             |  LONG
 GLubyte     |  unsigned char   |  _UNSIGNED _BYTE
 GLushort    |  unsigned short  |  _UNSIGNED INTEGER
 GLuint      |  unsigned int    |  _UNSIGNED LONG
 GLfloat     |  float           |  SINGLE
 GLclampf    |  float           |  SINGLE
 GLdouble    |  double          |  DOUBLE
 GLclampd    |  double          |  DOUBLE
 GLvoid      |  void            |  no parameters used


Description

  • OpenGL's documentation is available in several places, so we won't reproduce it here for another time.
  • The full description for this command can be found at Microsoft Docs and is also valid for QB64 usage.


See also



Navigation:
Main Page with Articles and Tutorials
Keyword Reference - Alphabetical
Keyword Reference - By usage
Report a broken link