static void DrawMesh( int rows, int cols )
{
static const GLfloat colorA[3] = { 0, 1, 0 };
static const GLfloat colorB[3] = { 0, 0, 1 };
const float dx = 2.0 / (cols - 1);
const float dy = 2.0 / (rows - 1);
float x, y;
int i, j;
#if 1
#define COLOR3FV(c) glVertexAttrib3fvARB(3, c)
#define VERTEX2F(x, y) glVertexAttrib2fARB(0, x, y)
#else
#define COLOR3FV(c) glColor3fv(c)
#define VERTEX2F(x, y) glVertex2f(x, y)
#endif
y = -1.0;
for (i = 0; i < rows - 1; i++) {
glBegin(GL_QUAD_STRIP);
x = -1.0;
for (j = 0; j < cols; j++) {
if ((i + j) & 1)
COLOR3FV(colorA);
else
COLOR3FV(colorB);
VERTEX2F(x, y);
VERTEX2F(x, y + dy);
x += dx;
}
glEnd();
y += dy;
}
}
static void
_tnl_Vertex2fv( const GLfloat *v )
{
GET_IMMEDIATE;
VERTEX2F( IM, v[0], v[1] );
}
static void
_tnl_Vertex2f( GLfloat x, GLfloat y )
{
GET_IMMEDIATE;
VERTEX2F( IM, x, y );
}