tgHillyGround.h

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#ifndef CORE_TERRAIN_TG_HILLY_GROUND_H
#define CORE_TERRAIN_TG_HILLY_GROUND_H

#include "tgBulletGround.h"

#include "LinearMath/btScalar.h"
#include "LinearMath/btVector3.h"

// std::size_t
#include <cstddef>

// Forward declarations
class btRigidBody;
class btTriangleIndexVertexArray;

class tgHillyGround : public tgBulletGround
{
    public:

        struct Config
        {
            public:
                Config(btVector3 eulerAngles = btVector3(0.0, 0.0, 0.0),
                       double friction = 0.5,
                       double restitution = 0.0,
                       btVector3 size = btVector3(500.0, 1.5, 500.0),
                       btVector3 origin = btVector3(0.0, 0.0, 0.0),
                       std::size_t nx = 50,
                       std::size_t ny = 50,
                       double margin = 0.05,
                       double triangleSize = 5.0,
                       double waveHeight = 5.0,
                       double offset = 0.5);

                btVector3 m_eulerAngles;

                btScalar  m_friction;

                btScalar  m_restitution;

                btVector3 m_size;

                btVector3 m_origin;

                std::size_t m_nx;

                std::size_t m_ny;

                double m_margin;

                double m_triangleSize;

                double m_waveHeight;

                double m_offset;
        };

        tgHillyGround();

        tgHillyGround(const tgHillyGround::Config& config);

        virtual ~tgHillyGround();

        virtual btRigidBody* getGroundRigidBody() const;

        btCollisionShape* hillyCollisionShape();

    private:  
        Config m_config;

        btTriangleIndexVertexArray* createMesh(std::size_t triangleCount, int indices[], std::size_t vertexCount, btVector3 vertices[]);

        btCollisionShape *createShape(btTriangleIndexVertexArray * pMesh);

        void setVertices(btVector3 vertices[]);

        void setIndices(int indices[]);
        
        // Store this so we can delete it later
        btTriangleIndexVertexArray* m_pMesh;
        btVector3 * m_vertices;
        int * m_pIndices;

};

#endif  // TG_HILLY_GROUND_H