VertexArray.h

/*
 * Gamedev Framework (gf)
 * Copyright (C) 2016-2022 Julien Bernard
 *
 * This software is provided 'as-is', without any express or implied
 * warranty.  In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 *    claim that you wrote the original software. If you use this software
 *    in a product, an acknowledgment in the product documentation would be
 *    appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 *
 * Part of this file comes from SFML, with the same license:
 * Copyright (C) 2007-2015 Laurent Gomila (laurent@sfml-dev.org)
 */
#ifndef GF_VERTEX_ARRAY_H
#define GF_VERTEX_ARRAY_H
 
#include <cstddef>
#include <vector>
 
#include "Drawable.h"
#include "GraphicsApi.h"
#include "PrimitiveType.h"
#include "Rect.h"
#include "Vertex.h"
 
namespace gf {
#ifndef DOXYGEN_SHOULD_SKIP_THIS
inline namespace v1 {
#endif
 
  class GF_GRAPHICS_API VertexArray : public Drawable {
  public:
    VertexArray()
    : m_type(PrimitiveType::Points)
    {
 
    }
 
    VertexArray(PrimitiveType type, std::size_t count = 0)
    : m_type(type)
    , m_vertices(count)
    {
 
    }
 
    std::size_t getVertexCount() const {
      return m_vertices.size();
    }
 
    const Vertex *getVertexData() const {
      return m_vertices.data();
    }
 
    Vertex& operator[](std::size_t index) {
      return m_vertices[index];
    }
 
    const Vertex& operator[](std::size_t index) const {
      return m_vertices[index];
    }
 
    const Vertex *begin() const {
      return m_vertices.data();
    }
 
    const Vertex *end() const {
      return m_vertices.data() + m_vertices.size();
    }
 
    Vertex *begin() {
      return m_vertices.data();
    }
 
    Vertex *end() {
      return m_vertices.data() + m_vertices.size();
    }
 
    bool isEmpty() const {
      return m_vertices.empty();
    }
 
    void clear() {
      m_vertices.clear();
    }
 
    void resize(std::size_t count) {
      m_vertices.resize(count);
    }
 
    void reserve(std::size_t capacity) {
      m_vertices.reserve(capacity);
    }
 
    void append(const Vertex& vertex) {
      m_vertices.push_back(vertex);
    }
 
    template<typename ... V>
    void appendAll(V&& ... vertices) {
      (append(std::forward<V>(vertices)), ...);
    }
 
    void setPrimitiveType(PrimitiveType type) {
      m_type = type;
    }
 
    PrimitiveType getPrimitiveType() const {
      return m_type;
    }
 
    RectF getBounds() const;
 
    virtual void draw(RenderTarget& target, const RenderStates& states) override;
 
  private:
    PrimitiveType m_type;
    std::vector<Vertex> m_vertices;
  };
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
}
#endif
}
 
#endif // GF_VERTEX_ARRAY_H