glScale(3gl)

1GLSCALE(3G)                                                        GLSCALE(3G)
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NAME

6       glScaled,  glScalef  - multiply the current matrix by a general scaling
7       matrix
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C SPECIFICATION

11       void glScaled( GLdouble x,
12                      GLdouble y,
13                      GLdouble z )
14       void glScalef( GLfloat x,
15                      GLfloat y,
16                      GLfloat z )
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PARAMETERS

20       x, y, z
21              Specify scale factors along the x, y, and z axes, respectively.
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DESCRIPTION

24       glScale produces a nonuniform scaling along the x, y, and z axes.   The
25       three  parameters  indicate  the desired scale factor along each of the
26       three axes.
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28       The current matrix (see  glMatrixMode)  is  multiplied  by  this  scale
29       matrix,  and the product replaces the current matrix as if glScale were
30       called with the following matrix as its argument:
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33                                       x 0 0 0
34                                      ⎛⎝0 y 0 0⎞⎠
35                                       0 0 z 0
36                                       0 0 0 1
37       If the matrix mode is either GL_MODELVIEW or GL_PROJECTION, all objects
38       drawn after glScale is called are scaled.
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40       Use glPushMatrix and glPopMatrix to save and restore the unscaled coor‐
41       dinate system.
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NOTES

44       If scale factors other than 1 are applied to the modelview  matrix  and
45       lighting  is  enabled,  lighting  often  appears  wrong.  In that case,
46       enable automatic normalization of normals by calling glEnable with  the
47       argument GL_NORMALIZE.
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ERRORS

50       GL_INVALID_OPERATION  is  generated  if glScale is executed between the
51       execution of glBegin and the corresponding execution of glEnd.
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ASSOCIATED GETS

54       glGet with argument GL_MATRIX_MODE
55       glGet with argument GL_COLOR_MATRIX
56       glGet with argument GL_MODELVIEW_MATRIX
57       glGet with argument GL_PROJECTION_MATRIX
58       glGet with argument GL_TEXTURE_MATRIX
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