Static Sub LookAt ( EyeX As Float, EyeY As Float, EyeZ As Float, CenterX As Float, CenterY As Float, CenterZ As Float, UpX As Float, UpY As Float, UpZ As Float )
Define a viewing transformation.
- 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.
creates a viewing matrix derived from an eye point, a reference
point indicating the center of the scene, and an UP
maps the reference point to the negative z
axis and the
eye point to the origin.
When a typical projection matrix is used,
the center of the scene therefore 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.
vector must not be parallel to the line of sight from the
eye point to the reference point.
be the vector
Then normalize as follows:
M is then constructed as follows:
is equivalent to
glTranslated(-eyex, -eyey, -eyez);
See original documentation on OpenGL website