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<?php |
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namespace AmaTeam\Image\Projection\Type\CubeMap; |
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use AmaTeam\Image\Projection\Type\AbstractValidatingMapping; |
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use AmaTeam\Image\Projection\Type\CubeMap\Mapping\Face; |
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use AmaTeam\Image\Projection\Type\CubeMap\Mapping\Vector; |
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use BadMethodCallException; |
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class Mapping extends AbstractValidatingMapping |
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{ |
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/** |
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* @var Face[] |
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*/ |
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private $faces; |
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/** |
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* @var string[] |
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*/ |
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private $faceNameMap; |
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/** |
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* @var int[] |
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*/ |
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private $inverseFaceNameMap; |
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public function __construct() |
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{ |
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$this->faces = Face::generateCubeFaces(); |
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$this->faceNameMap = Face::getNames(); |
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$this->inverseFaceNameMap = array_flip($this->faceNameMap); |
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} |
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/** |
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* Converts UV mapping to latitude/longitude. |
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* |
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* @param int|string $faceIndex |
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* @param float $u |
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* @param float $v |
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* |
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* @return float[] |
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*/ |
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public function getCoordinates($faceIndex, $u, $v) |
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{ |
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if (is_string($faceIndex)) { |
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$faceIndex = $this->inverseFaceNameMap[$faceIndex]; |
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} |
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$face = $this->faces[$faceIndex]; |
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$vector = $face->vectorize($u, $v); |
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// mangling vector since classic XYZ don't map to cube map XYZ |
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$vector = [$vector[2], $vector[0], $vector[1], $vector[3]]; |
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return Vector::toPolar($vector); |
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} |
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/** |
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* @param float $longitude |
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* @param float $latitude |
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* |
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* @return array Array of [Face, int (u), int (v)] |
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*/ |
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public function getPosition($latitude, $longitude) |
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{ |
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$vector = Vector::fromPolar($latitude, $longitude); |
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// mangling vector since classic XYZ don't map to cube map XYZ |
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$vector = [$vector[1], $vector[2], $vector[0], 1]; |
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$dominant = Vector::getDominant($vector); |
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$value = $vector[$dominant]; |
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$vector = Vector::multiply($vector, abs(1 / $value)); |
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$faceIndex = ($dominant * 2) + ($value < 0 ? 1 : 0); |
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$face = $this->faces[$faceIndex]; |
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$position = $face->map($vector); |
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return [ |
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$this->faceNameMap[$faceIndex], |
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$position[0], |
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$position[1] |
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]; |
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} |
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/** |
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* @param int|string $index |
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* @return Face |
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*/ |
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public function getFace($index) |
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{ |
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return $this->faces[$index]; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getFaces() |
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{ |
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return $this->faceNameMap; |
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} |
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} |
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ama-team /
php-projection-framework
