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Manual Reference Pages  - GLSCALE (3G)

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glScaled, glScalef - multiply the current matrix by a general scaling matrix

CONTENTS

C Specification
Parameters
Description
Notes
Errors
Associated Gets
See Also

void glScaled( GLdouble x,

             GLdouble y,
             GLdouble z )

void glScalef( GLfloat x,

             GLfloat y,
             GLfloat z )

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

 glScale produces a nonuniform scaling along the x, y, and z axes. The three parameters indicate the desired scale factor along each of the three axes.

The current matrix (see  glMatrixMode) is multiplied by this scale matrix, and the product replaces the current matrix as if  glScale were called with the following matrix as its argument:

( down20matrix ( x 0 0 0 0 y 0 0 0 0 z 0 0 0 0 1 ) )

If the matrix mode is either  GL_MODELVIEW or  GL_PROJECTION, all objects drawn after  glScale is called are scaled.

Use  glPushMatrix and  glPopMatrix to save and restore the unscaled coordinate system.

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

 GL_INVALID_OPERATION is generated if  glScale is executed between the execution of  glBegin and the corresponding execution of  glEnd.

 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),  glRotate(3G),  glTranslate(3G)

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