FrustumRadar.h

// Copyright eeGeo Ltd (2012-2014), All Rights Reserved

#pragma once

#include "Types.h"
#include "VectorMath.h"

namespace Eegeo
{
    struct BoundingBox;
    
    enum
    {
        kVisible    = 0x01,
        kMinX       = 0x02,
        kMaxX       = 0x04,
        kMinY       = 0x08,
        kMaxY       = 0x10,
        kMinZ       = 0x20,
        kMaxZ       = 0x40,
    };
    
    enum
    {
        kResultOutside,
        kResultInside,
        kResultClipped,
        kResultInvalid = 0xff,
    };
    
    class FrustumRadar
    {
        Eegeo::m44  m_world;
        
        float       m_nearD;
        float       m_farD;
        
        float       m_tang;
        float       m_sphereX;
        float       m_sphereY;
        
        float       m_ratio;
        float       m_width;
        float       m_height;
        
    public:
        FrustumRadar(const Eegeo::m44& world, float fov, float _near, float _far, float _ratio);
        
        u32 TestPoint(const Eegeo::v3& point);
        u32 GetPointVisibilty(const Eegeo::v3& point);
        
        u32 TestBoundingBox(const BoundingBox& box);
        u32 TestSphere(const Eegeo::v3& point, float radius);
        
#if MATH_NEON && !TARGET_IPHONE_SIMULATOR
        u32 TestBoundingBoxNeon(const BoundingBox& box);
        u32 TestSphereNeon(const Eegeo::v3& point, float radius);
#else
        u32 TestBoundingBoxNonNeon(const BoundingBox& box);
        u32 TestSphereNonNeon(const Eegeo::v3& point, float radius);
#endif
        
        const Eegeo::m44&   getWorld() const { return m_world; }
    };
    
    inline u32 FrustumRadar::TestBoundingBox(const BoundingBox& box)
    {
#if MATH_NEON && !TARGET_IPHONE_SIMULATOR
        return TestBoundingBoxNeon(box);
#else
        return TestBoundingBoxNonNeon(box);
#endif
    }

    inline u32 FrustumRadar::TestSphere(const Eegeo::v3& point, float radius)
    {
#if MATH_NEON && !TARGET_IPHONE_SIMULATOR
        return TestSphereNeon(point, radius);
#else
        return TestSphereNonNeon(point, radius);
#endif
    }
}