gluLookAt -- define a viewing transformation
void gluLookAt(GLdouble eyex,
- eyex, eyey, eyez
Specifies the position of the eye point.
- centerx, centery, centerz
Specifies the position of the reference point.
- upx, upy, upz
Specifies the direction of the up vector.
gluLookAt creates a viewing matrix derived from an eye point, a
reference point indicating the center of the scene, and an up vector. The
matrix maps the reference point to the negative z axis and the eye
point to the origin, so that, when a typical projection matrix is used, the
center of the scene maps to the center of the viewport. Similarly, the
direction described by the up vector projected onto the viewing plane is mapped
to the positive y axis so that it points upward in the viewport. The
up vector must not be parallel to the line of sight from the eye to the
The matrix generated by gluLookAt postmultiplies the current matrix.
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© 1995 Uwe Behrens All rights reserved