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/*
model/vertexarray.h
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#ifndef __INCLUDED_MODEL_VERTEXARRAY_H__
#define __INCLUDED_MODEL_VERTEXARRAY_H__
#include "math/vector3f.h"
namespace model
{
// number of segments in a sphere circle, must be uneven
const int SPHERESEGMENTS = 127;
/// global geometry vertex array
/** a VertexArray acts like a stack of model vertices, it has no knowledge of what it is holding
*/
class VertexArray
{
public:
/// create a new VertexArray with size in Mb
VertexArray(size_t size);
~VertexArray();
/// clear array, set memory to 0
void clear();
/// print vertex array usage to console
void info();
size_t add_vertex(math::Vector3f const &v, math::Vector3f const &n, float tex_x = 0.0f, float tex_y = 0.0f);
/// true when the array is full
inline bool overflow() const {
return vertexarray_overflow;
}
/// return true if the vertex data has changed and needs to uploaded to video memory
inline bool dirty() const {
return vertexarray_dirty;
}
/// pointer to model vertices, sequential in GL_T2F_N3F_V3F format
inline const float *ptr() const {
return vertexarray_data;
}
/// size of the vertex array in number of floats (for a single array)
inline size_t size() const {
return vertexarray_size;
}
/// number of allocated floats
inline size_t index() const {
return vertexarray_index;
}
inline void set_dirty(const bool dirty = true) {
vertexarray_dirty = dirty;
}
static inline VertexArray *instance() {
return vertexarray_instance;
}
private:
void add_sphere();
size_t vertexarray_index;
size_t vertexarray_size;
/// model vertices, sequential in GL_T2F_N3F_V3F format
float *vertexarray_data;
bool vertexarray_overflow;
bool vertexarray_dirty;
static VertexArray *vertexarray_instance;
};
}
#endif // __INCLUDED_MODEL_VERTEXARRAY_H__
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