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gluProject ???֥??????Ⱥ?ɸ?Ϥ򥦥????ɥ???ɸ?Ϥ˥ޥåפ???

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GLint gluProject( GLdouble objX,

	GLdouble objY,
	GLdouble objZ,
	const GLdouble *model,
	const GLdouble *proj,
	const GLint *view,
	GLdouble* winX,
	GLdouble* winY,
	GLdouble* winZ )

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objX, objY, objZ

???֥??????Ⱥ?ɸ?????ꤹ?롣

model

???ߤΥ??ǥ??ӥ塼?????????ꤹ??(glGetDoublev ?ؿ???????????????)??

proj

???ߤμͱƹ????????ꤹ??(glGetDoublev ?ؿ???????????????)??

view

???ߤΥӥ塼?ݡ??Ȥ????ꤹ??(glGetIntegerv ?ؿ???????????????)??

winX, winY, winZ

???Ф??줿???????ɥ???ɸ???֤????롣

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gluProject ?ϻ??ꤵ?줿???֥??????Ⱥ?ɸ???? model, proj, view ???Ȥäƥ??????ɥ???ɸ???Ѵ????롣 ?Ѵ????̤? winX, winY, winZ ?˳?Ǽ?????롣 ?֤??? GL_TRUE ????????ɽ?????֤??? GL_FALSE ?? ???Ԥ?ɽ????

$v=(\mathrm{objX},\mathrm{objY},\mathrm{objZ},1.0)$ ??ɸ???׻??ϼ??Τ褦?˹Ԥ??? ?ޤ? $v=(\mathrm{objX},\mathrm{objY},\mathrm{objZ},1.0)$ ?? 4 ?? 1 ???ι????????롣 $v^{\prime }$ ???? gluProject ?? $v^{\prime }$ ?򼡤Τ褦?˷׻?????:

$v^{\prime }=P\times M\times v$

$P$ is the current projection matrix proj, $M$ is the current $4\times 4$ matrices in column-major order) and ' $\times$ ' represents ?????ǡ? $P$ ?ϸ??ߤμͱƹ??? proj, $M$ ?ϸ??ߤ? ???ǥ??ӥ塼???? model ?Ǥ???(?ɤ????? $4\times 4$ ?????ǡ? ?????Ǥ?Ϣ³???????Ȥʤ?)?? ' $\times$ ' ?Ϲ??????Ѥ?ɽ????

?????ȡ????????ɥ???ɸ?ϼ??Τ褦?˻??Ф?????:

$\mathrm{winX}=\mathrm{view}\left(0\right)+\mathrm{view}\left(2\right)*\left(v^{\prime }\right(0)+1)/2$

$\mathrm{winY}=\mathrm{view}\left(1\right)+\mathrm{view}\left(3\right)*\left(v^{\prime }\right(1)+1)/2.\mathrm{EN}.\mathrm{sp}.\mathrm{EQ}\mathrm{winZ}=\left(v^{\prime }\right(2)+1)/2$

??Ϣ????¶

glGet, gluUnProject