dart / external / github.com / google / vector_math.dart / 0cf5fa4bcd8e4175338444e0e6a3b09c52358078 / . / lib / src / vector_math / sphere.dart

// Copyright (c) 2015, Google Inc. Please see the AUTHORS file for details. | |

// All rights reserved. Use of this source code is governed by a BSD-style | |

// license that can be found in the LICENSE file. | |

part of vector_math; | |

/// Defines a sphere with a [center] and a [radius]. | |

class Sphere { | |

final Vector3 _center; | |

/// The [radius] of the sphere. | |

double radius; | |

/// The [center] of the sphere. | |

Vector3 get center => _center; | |

/// Create a new, uninitialized sphere. | |

Sphere() | |

: _center = Vector3.zero(), | |

radius = 0.0; | |

/// Create a sphere as a copy of [other]. | |

Sphere.copy(Sphere other) | |

: _center = Vector3.copy(other._center), | |

radius = other.radius; | |

/// Create a sphere from a [center] and a [radius]. | |

Sphere.centerRadius(Vector3 center, this.radius) | |

: _center = Vector3.copy(center); | |

/// Copy the sphere from [other] into this. | |

void copyFrom(Sphere other) { | |

_center.setFrom(other._center); | |

radius = other.radius; | |

} | |

/// Return if this contains [other]. | |

bool containsVector3(Vector3 other) => | |

other.distanceToSquared(center) < radius * radius; | |

/// Return if this intersects with [other]. | |

bool intersectsWithVector3(Vector3 other) => | |

other.distanceToSquared(center) <= radius * radius; | |

/// Return if this intersects with [other]. | |

bool intersectsWithSphere(Sphere other) { | |

final radiusSum = radius + other.radius; | |

return other.center.distanceToSquared(center) <= (radiusSum * radiusSum); | |

} | |

} |