# gluortho2d(3g) [xfree86 man page]

```GLUORTHO2D(3G)															    GLUORTHO2D(3G)

NAME
gluOrtho2D - define a 2D orthographic projection matrix

C SPECIFICATION
void gluOrtho2D( GLdouble left,
GLdouble right,
GLdouble bottom,
GLdouble top )

PARAMETERS
left, right Specify the coordinates for the left and right vertical clipping planes.

bottom, top Specify the coordinates for the bottom and top horizontal clipping planes.

DESCRIPTION
gluOrtho2D sets up a two-dimensional orthographic viewing region.  This is equivalent to calling glOrtho with near=-1 and far=1.

glOrtho(3G), gluPerspective(3G)

GLUORTHO2D(3G)```

## Check Out this Related Man Page

```GLORTHO(3G)							   OpenGL Manual						       GLORTHO(3G)

NAME
glOrtho - multiply the current matrix with an orthographic matrix

C SPECIFICATION
void glOrtho(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble nearVal, GLdouble farVal);

PARAMETERS
left, right
Specify the coordinates for the left and right vertical clipping planes.

bottom, top
Specify the coordinates for the bottom and top horizontal clipping planes.

nearVal, farVal
Specify the distances to the nearer and farther depth clipping planes. These values are negative if the plane is to be behind the
viewer.

DESCRIPTION
glOrtho describes a transformation that produces a parallel projection. The current matrix (see glMatrixMode()) is multiplied by this
matrix and the result replaces the current matrix, as if glMultMatrix() were called with the following matrix as its argument:

2 right - left 0 0 t x 0 2 top - bottom 0 t y 0 0 -2 farVal - nearVal t z 0 0 0 1

where t x = - right + left right - leftt y = - top + bottom top - bottomt z = - farVal + nearVal farVal - nearVal

Typically, the matrix mode is GL_PROJECTION, and left bottom - nearVal and right top - nearVal specify the points on the near clipping
plane that are mapped to the lower left and upper right corners of the window, respectively, assuming that the eye is located at (0, 0, 0).
- farVal specifies the location of the far clipping plane. Both nearVal and farVal can be either positive or negative.

Use glPushMatrix() and glPopMatrix() to save and restore the current matrix stack.

ERRORS
GL_INVALID_VALUE is generated if left = right, or bottom = top, or near = far.

GL_INVALID_OPERATION is generated if glOrtho is executed between the execution of glBegin() and the corresponding execution of glEnd().

ASSOCIATED GETS
glGet() with argument GL_MATRIX_MODE

glGet() with argument GL_COLOR_MATRIX

glGet() with argument GL_MODELVIEW_MATRIX

glGet() with argument GL_PROJECTION_MATRIX

glGet() with argument GL_TEXTURE_MATRIX

glFrustum(), glMatrixMode(), glMultMatrix(), glPushMatrix(), glViewport()

http://oss.sgi.com/projects/FreeB/.

AUTHORS
opengl.org

opengl.org							    06/10/2014							       GLORTHO(3G)```
Man Page

## No xorg.conf or XF86Config

There is no xorg.conf file and no XF86Config file on a certain FreeBSD machine: # locate xorg.conf /usr/local/man/man5/xorg.conf.5.gz # locate XF86Config # Can someone let me know if that means that there is a bare bones set up possible only? xrandr works fine, but I am looking for ways to...

## Can a script resize it's own mintty console?

I'm looking for finer granularity than the 20 ANSI escape sequence screen modes. What I'd like to do is have the terminal increase it's own height when I have to show the user a long menu. Platform is Cygwin 64 running over Win 7 Pro. Mike

## Shopt -s histappend

What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file. # When the shell exits, append to the history file instead of overwriting it shopt -s histappend

## Fedora 30 and Slackware 14.2, how to obtain the same rendering?

Look this very good rendering on Slackware 14.2 in my opinion is near perfect. https://i.stack.imgur.com/q5trL.png Now look the same page on Fedora 30 https://i.stack.imgur.com/FBQv7.png In my opinion the fonts on Fedora are too small and difficult to read, I prefer the fat fonts of...