gluLookAt function
The gluLookAt function defines a viewing transformation.
Syntax
void WINAPI gluLookAt(
GLdouble eyex,
GLdouble eyey,
GLdouble eyez,
GLdouble centerx,
GLdouble centery,
GLdouble centerz,
GLdouble upx,
GLdouble upy,
GLdouble upz
);
Parameters
-
eyex
-
The position of the eye point.
-
eyey
-
The position of the eye point.
-
eyez
-
The position of the eye point.
-
centerx
-
The position of the reference point.
-
centery
-
The position of the reference point.
-
centerz
-
The position of the reference point.
-
upx
-
The direction of the up vector.
-
upy
-
The direction of the up vector.
-
upz
-
The direction of the up vector.
Return value
This function does not return a value.
Remarks
The gluLookAt function 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 you use a typical projection matrix, 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 reference point.
The matrix generated by gluLookAt postmultiplies the current matrix.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows 2000 Professional [desktop apps only] |
| Minimum supported server |
Windows 2000 Server [desktop apps only] |
| Header |
|
| Library |
|
| DLL |
|