Glu.Project (gb.opengl.glu)

Map object coordinates to window coordinates.

Parameters

objX, objY, objZ

Specify the object coordinates.

model

Specifies the current modelview matrix (as from a Gl.GetDoublev call).

proj

Specifies the current projection matrix (as from a Gl.GetDoublev call).

view

Specifies the current viewport (as from a Gl.GetIntegerv call).

winX, winY, winZ

Return the computed window coordinates.

Description

Glu.Project transforms the specified object coordinates into window coordinates using model, proj, and view. The result is stored in winX, winY, and winZ. A return value of Glu.TRUE indicates success, a return value of Glu.FALSE indicates failure.

To compute the coordinates, let $\mathit{v}<code\; style="white-space:nowrap;"></code>\; <mfenced\; open="("\; close=")">\; <mi\; mathvariant="italic">objX</mi>\; <mi\; mathvariant="italic">objY</mi>\; <mi\; mathvariant="italic">objZ</mi>\; <mn>1.0</mn>\; </mfenced>$ represented as a matrix with 4 rows and 1 column. Then Glu.Project computes ${\mathit{v}}^{″}$ as follows:

where $\mathit{P}$ is the current projection matrix proj and $\mathit{M}$ is the current modelview matrix model (both represented as $4\times 4$ matrices in column-major order).

The window coordinates are then computed as follows:

See also

See original documentation on OpenGL website