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gluProject
Chapter 14
348
gluProject
gluProject
: map object coordinates to window coordinates.
C Specification
GLint gluProject(
GLdouble objX,
GLdouble objY,
GLdouble objZ,
const GLdouble *model,
const GLdouble *proj,
const GLint *view,
GLdouble* winX,
GLdouble* winY,
GLdouble* winZ)
Parameters
objA, objY, objZ Specify the object coordinates.
model
Specifies the current modelview matrix (as from a glGetDoublev call).
proj
Specifies the current projection matrix (as from a glGetDoublev call).
view
Specifies the current viewport (as from a glGetIntegerv call).
winX, winY, winZ Return the computed window coordinates.
Description
gluProject 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
GL_TRUE indicates success, a return value of GL_FALSE indicates failure.
To compute the coordinates, let v = (objX, objY, objZ, 1.0) represented as a matrix with 4
rows and 1 column. Then gluProject computes v as follows:
v = P
×
M
×
v
where P is the current projection matrix proj, M is the current modelview matrix model
(both represented as 4 4 matrices in column-major order) and "
×
" represents matrix
multiplication.
The window coordinates are then computed as follows:
winX = view(0) + view(2) (v’(0) + 1)/2
winY = view(1) + view(3) (v’(1) + 1)/2
winZ = (v(2) + 1)/ 2
See Also
glGet,
gluUnProject
Summary of Contents for c3700 - Workstation
Page 9: ...Chapter 1 9 1 A ...
Page 18: ...A glArrayElement Chapter 1 18 glNormalPointer glTexCoordPointer glVertexPointer ...
Page 19: ...Chapter 2 19 2 B ...
Page 40: ...B gluBuild2DMipmaps Chapter 2 40 ...
Page 41: ...Chapter 3 41 3 C ...
Page 49: ...C glXChooseVisual Chapter 3 49 See Also glXCreateContext glXGetConfig ...
Page 73: ...C glCopyPixels Chapter 3 73 glReadBuffer glReadPixels glStencilFunc ...
Page 84: ...C glCopyTexSubImage2D Chapter 3 84 glTexParameter glTexSubImage1D glTexSubImage2D ...
Page 93: ...Chapter 4 93 4 D ...
Page 99: ...D glDeleteTextures Chapter 4 99 glTexImage1D glTexImage2D glTexParameter ...
Page 127: ...Chapter 5 127 5 E ...
Page 148: ...E glEvalPoint Chapter 5 148 ...
Page 149: ...Chapter 6 149 6 F ...
Page 161: ...Chapter 7 161 7 G ...
Page 164: ...G glGenTextures Chapter 7 164 glTexImage1D glTexImage2D glTexParameter ...
Page 207: ...G glGetPointer Chapter 7 207 glSelectBuffer glTexCoordPointer glVertexPointer ...
Page 225: ...Chapter 8 225 8 H ...
Page 228: ...H glHint Chapter 8 228 ...
Page 229: ...Chapter 9 229 9 I ...
Page 248: ...I glIsTexture Chapter 9 248 ...
Page 249: ...Chapter 10 249 10 L ...
Page 256: ...L glLightModel Chapter 10 256 See Also glLight glMaterial ...
Page 271: ...Chapter 11 271 11 M ...
Page 291: ...Chapter 12 291 12 N ...
Page 312: ...N gluNurbsSurface Chapter 12 312 ...
Page 313: ...Chapter 13 313 13 O ...
Page 317: ...Chapter 14 317 14 P ...
Page 360: ...P glPushName Chapter 14 360 See Also glInitNames glLoadName glRenderMode glSelectBuffer ...
Page 362: ...P gluPwlCurve Chapter 14 362 ...
Page 363: ...Chapter 15 363 15 Q ...
Page 372: ...Q glXQueryVersion Chapter 15 372 glXQueryVersion ...
Page 373: ...Chapter 16 373 16 R ...
Page 390: ...R glRotate Chapter 16 390 ...
Page 391: ...Chapter 17 391 17 S ...
Page 397: ...S glScissor Chapter 17 397 See Also glEnable glViewport ...
Page 409: ...Chapter 18 409 18 T ...
Page 448: ...T glTexImage3DEXT Chapter 18 448 glTexGen glTexImage1D glTexImage2D glTexParameter ...
Page 457: ...T glTexSubImage1D Chapter 18 457 glTexImage2D glTexParameter glTexSubImage2D ...
Page 465: ...T glTranslate Chapter 18 465 See Also glMatrixMode glMultMatrix glPushMatrix glScale ...
Page 466: ...T glTranslate Chapter 18 466 ...
Page 467: ...Chapter 19 467 19 U ...
Page 469: ...U gluUnProject Chapter 19 469 See Also glGet gluProject ...
Page 471: ...U glXUseXFont Chapter 19 471 See Also glBitmap glXMakeCurrent ...
Page 472: ...U glXUseXFont Chapter 19 472 ...
Page 473: ...Chapter 20 473 20 V ...
Page 482: ...V glVisibilityBufferhp Chapter 20 482 ...
Page 483: ...Chapter 21 483 21 W ...
Page 486: ...W glXWaitX Chapter 21 486 ...