Name

or two-dimensional mesh

C Specification

    GLdouble u1,
    GLdouble u2 )

    GLfloat u1,
    GLfloat u2 )

    GLdouble u1,
    GLdouble u2,
    GLint vn,
    GLdouble v1,
    GLdouble v2 )

    GLfloat u1,
    GLfloat u2,
    GLint vn,
    GLfloat v1,
    GLfloat v2 )

eqn not supported

Parameters

un

Specifies the number of partitions in the grid range interval [u1, u2]. Must be positive.

u1, u2

Specify the mappings for integer grid domain values $i~=~0$ and $i~=~"un"$.

vn

Specifies the number of partitions in the grid range interval [v1, v2]
(glMapGrid2 only).

v1, v2

Specify the mappings for integer grid domain values $j~=~0$ and $j~=~"vn"$
(glMapGrid2 only).

Description

glMapGrid1 and glMapGrid2 specify the linear grid mappings between the $i$ (or $i$ and $j$) integer grid coordinates, to the $u$ (or $u$ and $v$) floating-point evaluation map coordinates. See glMap1 and glMap2 for details of how $u$ and $v$ coordinates are evaluated.

glMapGrid1 specifies a single linear mapping such that integer grid coordinate 0 maps exactly to u1, and integer grid coordinate un maps exactly to u2. All other integer grid coordinates $i$ are mapped so that

glMapGrid2 specifies two such linear mappings. One maps integer grid coordinate $i~=~0$ exactly to u1, and integer grid coordinate $i~=~"un"$ exactly to u2. The other maps integer grid coordinate $j~=~0$ exactly to v1, and integer grid coordinate $j~=~"vn"$ exactly to v2. Other integer grid coordinates $i$ and $j$ are mapped such that

The mappings specified by glMapGrid are used identically by glEvalMesh and glEvalPoint.

Errors

GL_INVALID_OPERATION is generated if glMapGrid is executed between the execution of glBegin and the corresponding execution of glEnd.

Associated Gets

See Also

Table of Contents

• Name
• C Specification
• Parameters
• Description
• Errors
• Associated Gets
• See Also