MirOS Manual: glRotate(3), glRotated(3), glRotatef(3)

GLROTATE(3G)        UNIX Programmer's Manual         GLROTATE(3G)

NAME

glRotated, glRotatef - 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:

|
| x2(1-c) + c     xy(1-c) - zs    xz(1-c) + ys   0  |
|                                                   |
| yx(1-c) + zs    y2(1-c) + c     yz(1-c) - xs   0  |
|                                                   |
| xz(1-c) - ys    yz(1-c) + xs    z2(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 unro-
tated 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 coun-
terclockwise.

MirOS BSD #10-current  Printed 03.04.2017                       1

GLROTATE(3G)        UNIX Programmer's Manual         GLROTATE(3G)

ERRORS

GL_INVALID_OPERATION is generated if glRotate is executed
between the execution of glBegin and the corresponding exe-
cution 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

glMatrixMode(3G), glMultMatrix(3G), glPushMatrix(3G),
glScale(3G), glTranslate(3G)

MirOS BSD #10-current  Printed 03.04.2017                       2

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