115 lines
3.7 KiB
C++
115 lines
3.7 KiB
C++
#include "Sphere.h"
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#include "OysterCollision3D.h"
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using namespace ::Oyster::Collision3D;
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using namespace ::Oyster::Math;
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Sphere::Sphere( ) : ICollideable(Type_sphere)
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{
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this->center = Float4::standard_unit_w;
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this->radius = 0.0f;
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}
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Sphere::Sphere( const Float3 &p, const Float &r ) : ICollideable(Type_sphere)
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{
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this->center = Float4( p, 1.0f );
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this->radius = r;
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}
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Sphere::Sphere( const Float4 &p, const Float &r ) : ICollideable(Type_sphere)
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{
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this->center = p;
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this->radius = r;
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}
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Sphere::~Sphere( ) {}
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Sphere & Sphere::operator = ( const Sphere &sphere )
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{
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this->center = sphere.center;
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this->radius = sphere.radius;
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return *this;
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}
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::Utility::DynamicMemory::UniquePointer<ICollideable> Sphere::Clone( ) const
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{
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return ::Utility::DynamicMemory::UniquePointer<ICollideable>( new Sphere(*this) );
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}
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bool Sphere::Intersects( const ICollideable &target ) const
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{
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switch( target.type )
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{
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case Type_universe: return true;
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case Type_point: return Utility::Intersect( *this, (const Point&)target );
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case Type_ray: return Utility::Intersect( *this, (const Ray&)target, ((const Ray&)target).collisionDistance );
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case Type_sphere: return Utility::Intersect( *this, (const Sphere&)target );
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case Type_plane: return Utility::Intersect( (const Plane&)target, *this );
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//case Type_triangle: return false; // TODO:
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case Type_box_axis_aligned: return Utility::Intersect( (const BoxAxisAligned&)target, *this );
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case Type_box: return Utility::Intersect( (const Box&)target, *this );
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//case Type_frustrum: return false; // TODO:
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default: return false;
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}
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}
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bool Sphere::Intersects( const ICollideable &target, Float4 &worldPointOfContact ) const
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{
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switch( target.type )
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{
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case Type_universe:
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worldPointOfContact = this->center;
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return true;
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case Type_point: return Utility::Intersect( *this, (const Point&)target, worldPointOfContact );
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case Type_ray: return Utility::Intersect( *this, (const Ray&)target, ((const Ray&)target).collisionDistance, worldPointOfContact );
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case Type_sphere: return Utility::Intersect( *this, (const Sphere&)target, worldPointOfContact );
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case Type_plane: return Utility::Intersect( (const Plane&)target, *this, worldPointOfContact );
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//case Type_triangle: return false; // TODO:
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case Type_box_axis_aligned: return Utility::Intersect( (const BoxAxisAligned&)target, *this, worldPointOfContact );
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case Type_box: return Utility::Intersect( (const Box&)target, *this, worldPointOfContact );
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//case Type_frustrum: return false; // TODO:
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default:
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worldPointOfContact = Float3::null;
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return false;
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}
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}
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bool Sphere::Contains( const ICollideable &target ) const
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{
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switch( target.type )
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{
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case Type_point: return Utility::Intersect( *this, (const Point&)target );
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case Type_sphere: return Utility::Contains( *this, (const Sphere&)target );
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//case Type_triangle: return false; // TODO:
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//case Type_box_axis_aligned: return false; // TODO:
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//case Type_box: return false; // TODO:
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//case Type_frustrum: return false; // TODO:
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default: return false;
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}
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}
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Float Sphere::TimeOfContact( const ICollideable &deuterStart, const ICollideable &deuterEnd ) const
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{
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if( deuterStart.type != deuterEnd.type )
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return -1.0f;
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switch( deuterStart.type )
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{
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//case Type_point: // not implemented
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//case Type_sphere: // not implemented
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//case Type_box: // not implemented
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case Type_universe: return 0.0f;
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default: return 1.0f;
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}
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}
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namespace Oyster { namespace Math
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{
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Sphere & Nlerp( const Sphere &start, const Sphere &end, Float t, Sphere &targetMem )
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{
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Float4 i = Lerp( Float4(start.center.xyz, start.radius), Float4(end.center.xyz, end.radius), t );
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targetMem.center.xyz = i.xyz;
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targetMem.radius = i.w;
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return targetMem;
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}
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} } |