{
// create the file node and shader
//select -all;
//delete; 

// __________ IMAGE MAPPING _________________________________
string $filenode = `createNode file`;
string $shader = `createNode lambert`;
string $path = "F:/TM/vsfx705/texture/city2.jpg";
// connect the nodes
connectAttr ($filenode + ".outColor") ($shader + ".color");

// insert the image path in the file node
string $cropmap = $path;
setAttr -type "string" ($filenode + ".fileTextureName") $cropmap;

// assign the shader to an object
string $object[] = `nurbsPlane -ax 0 1 0 -name "nurbsPlane1"`;
//string $object[] = `sphere -name "nurbsPlane1"`;
// __________________________________________________________
select -r $object[0];
hyperShade -assign $shader;

//DisplayShadedAndTextured;
int $u, $v, 
$nu = 50, $nv = 50; // steps in u and v
float $minU = 0, $minV = 0, // u/v - start and ending
$maxU = 1, $maxV = 1; // the surface - slightly less than 0 to 1

// Grab all our texture map samples
float $rgb[] = `colorAtPoint -o RGB -su $nu -sv $nv -mu $minU -mv $minV 
-xu $maxU -xv $maxV $filenode`;

float $deltaU = ($maxU - $minU)/($nu - 1); // step size in u
float $deltaV = ($maxV - $minV)/($nv - 1); // step size in v
float $currU, $currV;
int $index = 0;

$currU = $minU;
//sphere -r 0.05 -n sph;
for($n = 0; $n < $nu; $n++)
{
$currU += $deltaU;
$currV = $minV;

for($i = 0; $i < $nv; $i++)
{
float $r = $rgb[$index];
float $g = $rgb[$index + 1];
float $b = $rgb[$index + 2];
print($r + " " + $g + " " + $b + "\n");
if( ($r + $g + $b) < 2)
{
float $p[] = `pointOnSurface 
-u $currU
-v $currV
$object[0]`;

string $listB[]={"building01", "building02", "building03"};
string $listA[]={"building04", "building05", "building06"};
string $listC[]={"building01", "building02", "building03", "building04", "building05", "building06"};

//-----------R value. building A--commercial
if( $r > 0.8 )
{
int $number = rand(0,3);
string $building = $listA[$number];
select $building;
instance $building;
scale -r (rand(1, 2)) (rand(1, 2)) 1;
move $p[0] $p[1] $p[2];
int $rottime = rand(0,4);
rotate -r 0 (90*$rottime) 0;
}

//-----------B value. building B--residential
if($g > 0.8)
{
int $number = rand(0,3);
string $building = $listB[$number];
select $building;
instance $building;
scale -r (rand(1, 3)) (rand(1, 2)) (rand(1, 2));
move $p[0] $p[1] $p[2];
int $rottime = rand(0,4);
rotate -r 0 (90*$rottime) 0;
}

//-----------G value. building C--45 degree diagonal
if($b > 0.8)
{
int $number = rand(0,6);
string $building = $listC[$number];
select $building;
instance $building;
scale -r (rand(2, 3)) (rand(1, 2)) 1;
move $p[0] $p[1] $p[2];
int $rottime = rand(0,4);
rotate -r 0 (45+(90*$rottime)) 0;
//rotate -r 0 45 0;
}

} 
$index += 3;
$currV += $deltaV;
}
}

}