HP b2600 Reference Manual page 276

M
glMap1
Each control point is four floating-point values representing red, green, blue, and alpha.
Internal glColor4 commands are generated when the map is evaluated but the current
color is not updated with the value of these glColor4 commands.
GL_MAP1_NORMAL
Each control point is three floating-point values representing the x, y, and z components
of a normal vector. Internal glNormal commands are generated when the map is
evaluated but the current normal is not updated with the value of these glNormal
commands.
GL_MAP1_TEXTURE_COORD_1
Each control point is a single floating-point value representing the s texture coordinate.
Internal glTexCoord1 commands are generated when the map is evaluated but the
current texture coordinates are not updated with the value of these glTexCoord
commands.
GL_MAP1_TEXTURE_COORD_2
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_MAP1_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_MAP1_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.
stride, order, 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. order is the
number of control points in the array. stride specifies how many float or double locations
to advance the internal memory pointer to reach the next control point.
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 glMap1 before glMap1 returns. Changes to he contents of points
have no effect after glMap1 is called.
Errors
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•
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GL_INVALID_ENUM is generated if target is not an accepted value.
GL_INVALID_VALUE is generated if u1 is equal to u2.
GL_INVALID_VALUE is generated if stride is less than the number of values in a
control point.
Chapter 11