GlPointSize: Difference between revisions

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(Created page with "'''_glPointSize:''' specify the diameter of rasterized points {{PageSyntax}} SUB _glPointSize (BYVAL size AS SINGLE) void '''_glPointSize'''(GLfloat {{Parameter|size}}); ; size : Specifies the diameter of rasterized points. The initial value is 1. {{PageDescription}} '''_glPointSize''' specifies the rasterized diameter of points. If point size mode is disabled (see {{KW|_glEnable}} with parameter {{KW|_GL_PROGRAM_POINT_SIZE}}), this value will be used to rast...")
 
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'''_glPointSize:''' specify the diameter of rasterized points
{{DISPLAYTITLE:_glPointSize}}
The '''_glPointSize''' statement specifies the diameter of rasterized points.




{{PageSyntax}}
{{PageSyntax}}
: '''_glPointSize''' GLfloat {{Parameter|size}}


  SUB _glPointSize (BYVAL size AS SINGLE)
  void '''_glPointSize'''(GLfloat {{Parameter|size}});


 
{{PageParameters}}
; size
* OpenGL is using its own set of variable types to describe its command parameters.
: Specifies the diameter of rasterized points. The initial value is 1.
* Use the following table to find the respective QB64 [[Variable Types]].
{{OpenGLTypesPlugin}}




{{PageDescription}}
{{PageDescription}}
 
* OpenGL's documentation is available in several places, so we won't reproduce it here for another time.
'''_glPointSize''' specifies the rasterized diameter of points. If point size mode is disabled (see {{KW|_glEnable}} with parameter {{KW|_GL_PROGRAM_POINT_SIZE}}), this value will be used to rasterize points. Otherwise, the value written to the shading language built-in variable {{code|gl_PointSize}} will be used.
* The full description for this command can be found at [https://docs.microsoft.com/en-us/windows/win32/opengl/glpointsize Microsoft Docs] and is also valid for QB64 usage.
 
 
{{PageNotes}}
 
The point size specified by '''_glPointSize''' is always returned when {{KW|_GL_POINT_SIZE}} is queried. Clamping and rounding for points have no effect on the specified value.
 
 
{{PageErrors}}
 
{{KW|_GL_INVALID_VALUE}} is generated if {{Parameter|size}} is less than or equal to 0.
 
 
{{PageUseWith}}
 
{{KW|_glGet}} with argument {{KW|_GL_POINT_SIZE_RANGE}}
 
{{KW|_glGet}} with argument {{KW|_GL_POINT_SIZE_GRANULARITY}}
 
{{KW|_glGet}} with argument {{KW|_GL_POINT_SIZE}}
 
{{KW|_glGet}} with argument {{KW|_GL_POINT_SIZE_MIN}}
 
{{KW|_glGet}} with argument {{KW|_GL_POINT_SIZE_MAX}}
 
{{KW|_glGet}} with argument {{KW|_GL_POINT_FADE_THRESHOLD_SIZE}}
 
{{KW|_glIsEnabled}} with argument {{KW|_GL_PROGRAM_POINT_SIZE}}




{{PageSeeAlso}}
{{PageSeeAlso}}
 
* [[_GL|SUB _GL]]
[[_GL|SUB _GL]]
{{KW|_glEnable|(GL_PROGRAM_POINT_SIZE)}}, {{KW|_glPointParameter}}




{{PageCopyright}}
{{PageNavigation}}


Copyright 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see [http://oss.sgi.com/projects/FreeB/ http://oss.sgi.com/projects/FreeB/].
[[Category:Final]]

Revision as of 14:50, 19 July 2022

The _glPointSize statement specifies the diameter of rasterized points.


Syntax

_glPointSize GLfloat size


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.
   Table 2: Relations between the OpenGL variable types vs. C/C++ and QB64.
 ┌──────────────┬────────────────┬──────────────────────────────────────────┐
 │    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   (1) │ void           │ _OFFSET(any fixed lenght string or _BYTE │
 │              │                │         array element)                   │
 └──────────────┴────────────────┴──────────────────────────────────────────┘
 Note: If a parameter has an asterisk (*) in front, then it's a pointer to
       the designated OpenGL variable type, rather than a value of that type.
       Those must be passed using the _OFFSET(...) notation.

 E.g.  GLuint *anyParam is actually the offset of a _UNSIGNED LONG (~&)
       variable or array, which must be passed as _OFFSET(anyVar~&) or
       _OFFSET(anyArr~&()) respectively.

  (1)  This type is regularly only used for pointers (with asterisk (*)) to
       any byte sized memory data, hence _BYTE or fixed length strings.


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


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