VertexArray.h

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// Copyright © 2008-2023 Pioneer Developers. See AUTHORS.txt for details
// Licensed under the terms of the GPL v3. See licenses/GPL-3.txt
 
#ifndef _VERTEXARRAY_H
#define _VERTEXARRAY_H
 
#include "Types.h"
#include "libs.h"
 
namespace Graphics {
 
    /*
 * VertexArray is a multi-purpose vertex container. Users specify
 * the attributes they intend to use and then add vertices. Renderers
 * do whatever they need to do with regards to the attribute set.
 * This is not optimized for high performance drawing, but okay for simple
 * cases.
 */
    class VertexArray {
    public:
        //specify attributes to be used, additionally reserve space for vertices
        VertexArray(AttributeSet attribs, int size = 0);
        ~VertexArray();
 
        //check presence of an attribute
        __inline bool HasAttrib(const VertexAttrib v) const { return (m_attribs & v) != 0; }
        __inline Uint32 GetNumVerts() const { return static_cast<Uint32>(position.size()); }
        __inline AttributeSet GetAttributeSet() const { return m_attribs; }
 
        __inline bool IsEmpty() const { return position.empty(); }
 
        //removes vertices, does not deallocate space
        // if reserveSize != 0, ensures the array has enough space for at least that many elements
        void Clear(uint32_t reserveSize = 0);
 
        // don't mix these
        void Add(const vector3f &v);
        void Add(const vector3f &v, const Color &c);
        void Add(const vector3f &v, const Color &c, const vector3f &n);
        void Add(const vector3f &v, const Color &c, const vector2f &uv);
        void Add(const vector3f &v, const vector2f &uv);
        void Add(const vector3f &v, const vector3f &n);
        void Add(const vector3f &v, const vector3f &n, const vector2f &uv);
        void Add(const vector3f &v, const vector3f &n, const vector2f &uv, const vector3f &tang);
        //virtual void Reserve(unsigned int howmuch)
 
        // don't mix these
        void Set(const Uint32 idx, const vector3f &v);
        void Set(const Uint32 idx, const vector3f &v, const Color &c);
        void Set(const Uint32 idx, const vector3f &v, const Color &c, const vector3f &normal);
        void Set(const Uint32 idx, const vector3f &v, const Color &c, const vector2f &uv);
        void Set(const Uint32 idx, const vector3f &v, const vector2f &uv);
        void Set(const Uint32 idx, const vector3f &v, const vector3f &n);
        void Set(const Uint32 idx, const vector3f &v, const vector3f &normal, const vector2f &uv);
        void Set(const Uint32 idx, const vector3f &v, const vector3f &n, const vector2f &uv, const vector3f &tang);
 
        //could make these private, but it is nice to be able to
        //add attributes separately...
        std::vector<vector3f> position;
        std::vector<vector3f> normal;
        std::vector<Color> diffuse;
        std::vector<vector2f> uv0;
        std::vector<vector3f> tangent;
 
    private:
        void Reserve(uint32_t size);
        AttributeSet m_attribs;
    };
 
} // namespace Graphics
 
#endif