如何用GD制作2个或更多椭圆之间的渐变？
以下是椭圆：
<?php
header( "Content-type: image/gif" );
$imagen = imagecreatefrompng('tras.png');
$morado = array( 'r' => 186, 'g' => 0, 'b' => 255 );
$amarillo = array( 'r' => 255, 'g' => 220, 'b' => 0 );
$pasos = 2000;
$incr_r = ( $amarillo['r'] - $morado['r'] ) / $pasos;
$incr_g = ( $amarillo['g'] - $morado['g'] ) / $pasos;
$incr_b = ( $amarillo['b'] - $morado['b'] ) / $pasos;
$cx = imagesx( $imagen ) / 3;
$cy = imagesy( $imagen ) / 3;
$ancho = 240;
$alto = 140;
$incr_x = $ancho / $pasos;
$incr_y = $alto / $pasos;
$r = $morado['r'];
$g = $morado['g'];
$b = $morado['b'];
for( $i = 0; $i < $pasos; $i++ ){
$color = imagecolorallocate( $imagen, $r, $g, $b );
imagefilledellipse( $imagen, $cx, $cy, $ancho, $alto, $color );
imagefilledellipse( $imagen, $ñ, $k, $ancho, $alto, $color );
$r += $incr_r;
$g += $incr_g;
$b += $incr_b;
$ancho -= $incr_x;
$alto -= $incr_y;
}
imagegif( $imagen );
imagedestroy( $imagen );
?>
...模型 这个... http://img88.imageshack.us/img88/11/capturazv.png 没有削减
