openGL之API学习（二零七）glTexCoordPointer

Posted 2022-02-22 hankern

最多支持到gl3，gl4以后无此函数。

该函数在客户端调用。

纹理坐标数据初始是禁用的，不能被glArrayElement, glDrawElements, glDrawRangeElements, glDrawArrays, glMultiDrawArrays, or glMultiDrawElements调用。

注意，顶点数组保存在你的应用程序（系统内存），它在客户端。且处在服务端的OpenGL访问它们。这就是为什么拥有顶点数组这些特殊命令的原因，使用glEnableClientState()与glDisableClientState()而不是glEnable()与glDisable()。

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 texture coordinate sets. 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 texture coordinate set in the array. The initial value is 0.