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M
glMap2
Chapter 11
281
Each control point is two floating-point values representing the s and t texture
coordinates. Internal glTexCoord2 commands are generated when the map is evaluated
but the current texture coordinates are not updated with the value of these glTexCoord
commands.
GL_MAP2_TEXTURE_COORD_3
Each control point is three floating-point values representing the s, t, and r texture
coordinates. Internal glTexCoord3 commands are generated when the map is evaluated
but the current texture coordinates are not updated with the value of these glTexCoord
commands.
GL_MAP2_TEXTURE_COORD_4
Each control point is four floating-point values representing the s, t, r, and q texture
coordinates. Internal glTexCoord4 commands are generated when the map is evaluated
but the current texture coordinates are not updated with the value of these glTexCoord
commands.
ustride, uorder, vstride, vorder, and points define the array addressing for accessing the
control points. points is the location of the first control point, which occupies one, two,
three, or four contiguous memory locations, depending on which map is being defined.
There are uorder
×
vorder control points in the array. ustride specifies how many float or
double locations are skipped to advance the internal memory pointer from control point
R
ij
to control point R
(i+1)j
. vstride specifies how many float or double locations are
skipped to advance the internal memory pointer from control point R
ij
to control point
R
i(j+1)
.
Notes
As is the case with all GL commands that accept pointers to data, it is as if the contents
of points were copied by glMap2 before glMap2 returns. Changes to the contents of
points have no effect after glMap2 is called.
Initially, GL_AUTO_NORMAL is enabled. If GL_AUTO_NORMAL is enabled, normal
vectors are generated when either GL_MAP2_VERTEX_3 or GL_MAP2_VERTEX_4 is
used to generate vertices.
Errors
•
GL_INVALID_ENUM is generated if target is not an accepted value.
•
GL_INVALID_VALUE is generated if u1 is equal to u2, or if v1 is equal to v2.
•
GL_INVALID_VALUE is generated if either ustride or vstride is less than the
number of values in a control point.
•
GL_INVALID_VALUE is generated if either uorder or vorder is less than 1 or
greater than the return value of GL_MAX_EVAL_ORDER.
•
GL_INVALID_OPERATION is generated if glMap2 is executed between the
execution of glBegin and the corresponding execution of glEnd.
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 ...