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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\Svg\Filter; |
| 6 | |
| 7 | use Phpdftk\Svg\Element; |
| 8 | |
| 9 | /** |
| 10 | * SVG 2 Filter Effects §15.15.3 — `<feSpotLight>`. Cone-shaped |
| 11 | * source for `<feDiffuseLighting>` / `<feSpecularLighting>`. |
| 12 | * |
| 13 | * x, y, z: position in filter coordinates |
| 14 | * pointsAtX/Y/Z: aim point |
| 15 | * specularExponent: tightness of the cone (default 1) |
| 16 | * limitingConeAngle: outer half-angle in degrees; |
| 17 | * null = no falloff |
| 18 | */ |
| 19 | final class FeSpotLight extends Element |
| 20 | { |
| 21 | public function __construct() |
| 22 | { |
| 23 | parent::__construct('feSpotLight'); |
| 24 | } |
| 25 | |
| 26 | public function x(): float |
| 27 | { |
| 28 | return (float) ($this->getAttribute('x') ?? 0); |
| 29 | } |
| 30 | |
| 31 | public function y(): float |
| 32 | { |
| 33 | return (float) ($this->getAttribute('y') ?? 0); |
| 34 | } |
| 35 | |
| 36 | public function z(): float |
| 37 | { |
| 38 | return (float) ($this->getAttribute('z') ?? 0); |
| 39 | } |
| 40 | |
| 41 | public function pointsAtX(): float |
| 42 | { |
| 43 | return (float) ($this->getAttribute('pointsAtX') ?? 0); |
| 44 | } |
| 45 | |
| 46 | public function pointsAtY(): float |
| 47 | { |
| 48 | return (float) ($this->getAttribute('pointsAtY') ?? 0); |
| 49 | } |
| 50 | |
| 51 | public function pointsAtZ(): float |
| 52 | { |
| 53 | return (float) ($this->getAttribute('pointsAtZ') ?? 0); |
| 54 | } |
| 55 | |
| 56 | public function specularExponent(): float |
| 57 | { |
| 58 | return max(1.0, (float) ($this->getAttribute('specularExponent') ?? 1)); |
| 59 | } |
| 60 | |
| 61 | public function limitingConeAngle(): ?float |
| 62 | { |
| 63 | $v = $this->getAttribute('limitingConeAngle'); |
| 64 | return $v !== null ? (float) $v : null; |
| 65 | } |
| 66 | } |