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glTexCoordPointer

Chapter 18

425

glTexCoordPointer

glTexCoordPointer: deﬁne an array of texture coordinates.

C Speciﬁcation

void glTexCoordPointer(

GLint size,

GLenum type,

GLsizei stride,

const GLvoid *pointer)

Parameters

size Speciﬁes the number of coordinates per array element. Must be 1, 2, 3

or 4. The initial value is 4.

type Speciﬁes the data type of each texture coordinate. Symbolic constants

GL_SHORT, GL_INT, GL_FLOAT, or GL_DOUBLE are accepted. The

initial value is GL_FLOAT.

stride Speciﬁes the byte offset between consecutive array elements. If stride

is 0, the array elements are understood to be tightly packed. The initial

value is 0.

pointer Speciﬁes a pointer to the ﬁrst coordinate of the ﬁrst element in the

array.

Description

glTexCoordPointer speciﬁes the location and data format of an array of texture

coordinates to use when rendering. size speciﬁes the number of coordinates per element,

and must be 1, 2, 3, or 4. type speciﬁes the data type of each texture coordinate and stride

speciﬁes the byte stride from one array element to the next allowing vertexes and

attributes to be packed into a single array or stored in separate arrays. (Single-array

storage may be more efﬁcient on some implementations; see glInterleavedArrays.) When

a texture coordinate array is speciﬁed, size, type, stride, and pointer are saved client-side

state.

To enable and disable the texture coordinate array, call glEnableClientState and

glDisableClientState with the argument GL_TEXTURE_COORD_ARRAY. If enabled,

the texture coordinate array is used when glDrawArrays, glDrawElements or

glArrayElement is called.

Use glDrawArrays to construct a sequence of primitives (all of the same type) from

pre-speciﬁed vertex and vertex attribute arrays. Use glArrayElement to specify

primitives by indexing vertexes and vertex attributes and glDrawElements to construct

a sequence of primitives by indexing vertexes and vertex attributes.

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