Visit Our UNIX and Linux User Community

Linux and UNIX Man Pages

Test Your Knowledge in Computers #14
Difficulty: Easy
The F9 function key needs to be pressed during a Windows reboot to enter into Safe Mode.
True or False?
Linux & Unix Commands - Search Man Pages

glrotate(3g) [centos man page]

GLROTATE(3G)							   OpenGL Manual						      GLROTATE(3G)

NAME
glRotate - multiply the current matrix by a rotation matrix C SPECIFICATION
void glRotated(GLdouble angle, GLdouble x, GLdouble y, GLdouble z); void glRotatef(GLfloat angle, GLfloat x, GLfloat y, GLfloat z); PARAMETERS
angle Specifies the angle of rotation, in degrees. x, y, z Specify the x, y, and z coordinates of a vector, respectively. DESCRIPTION
glRotate produces a rotation of angle degrees around the vector x y z. The current matrix (see glMatrixMode()) is multiplied by a rotation matrix with the product replacing the current matrix, as if glMultMatrix() were called with the following matrix as its argument: x 2 1 - c + c x y 1 - c - z s x z 1 - c + y s 0 y x 1 - c + z s y 2 1 - c + c y z 1 - c - x s 0 x z 1 - c - y s y z 1 - c + x s z 2 1 - c + c 0 0 0 0 1 Where c = cos angle, s = sin angle, and x y z = 1 (if not, the GL will normalize this vector). If the matrix mode is either GL_MODELVIEW or GL_PROJECTION, all objects drawn after glRotate is called are rotated. Use glPushMatrix() and glPopMatrix() to save and restore the unrotated coordinate system. NOTES
This rotation follows the right-hand rule, so if the vector x y z points toward the user, the rotation will be counterclockwise. ERRORS
GL_INVALID_OPERATION is generated if glRotate 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 SEE ALSO
glMatrixMode(), glMultMatrix(), glPushMatrix(), glScale(), glTranslate() COPYRIGHT
Copyright (C) 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/. AUTHORS
opengl.org opengl.org 06/10/2014 GLROTATE(3G)

Check Out this Related Man Page

GLMULTMATRIX(3G)						   OpenGL Manual						  GLMULTMATRIX(3G)

NAME
glMultMatrix - multiply the current matrix with the specified matrix C SPECIFICATION
void glMultMatrixd(const GLdouble * m); void glMultMatrixf(const GLfloat * m); PARAMETERS
m Points to 16 consecutive values that are used as the elements of a 4 x 4 column-major matrix. DESCRIPTION
glMultMatrix multiplies the current matrix with the one specified using m, and replaces the current matrix with the product. The current matrix is determined by the current matrix mode (see glMatrixMode()). It is either the projection matrix, modelview matrix, or the texture matrix. EXAMPLES
If the current matrix is C and the coordinates to be transformed are v = v 0 v 1 v 2 v 3, then the current transformation is C x v, or c 0 c 4 c 8 c 12 c 1 c 5 c 9 c 13 c 2 c 6 c 10 c 14 c 3 c 7 c 11 c 15 x v 0 v 1 v 2 v 3 Calling glMultMatrix with an argument of m = m 0 m 1 ... m 15 replaces the current transformation with C x M x v, or c 0 c 4 c 8 c 12 c 1 c 5 c 9 c 13 c 2 c 6 c 10 c 14 c 3 c 7 c 11 c 15 x m 0 m 4 m 8 m 12 m 1 m 5 m 9 m 13 m 2 m 6 m 10 m 14 m 3 m 7 m 11 m 15 x v 0 v 1 v 2 v 3 Where v is represented as a 4 x 1 matrix. NOTES
While the elements of the matrix may be specified with single or double precision, the GL may store or operate on these values in less-than-single precision. In many computer languages, 4 x 4 arrays are represented in row-major order. The transformations just described represent these matrices in column-major order. The order of the multiplication is important. For example, if the current transformation is a rotation, and glMultMatrix is called with a translation matrix, the translation is done directly on the coordinates to be transformed, while the rotation is done on the results of that translation. ERRORS
GL_INVALID_OPERATION is generated if glMultMatrix 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 SEE ALSO
glLoadIdentity(), glLoadMatrix(), glLoadTransposeMatrix(), glMatrixMode(), glMultTransposeMatrix(), glPushMatrix() COPYRIGHT
Copyright (C) 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/. AUTHORS
opengl.org opengl.org 06/10/2014 GLMULTMATRIX(3G)

Featured Tech Videos