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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef _ADV_TREE_GENERATOR_H
#define _ADV_TREE_GENERATOR_H
#include "Rendering/GL/myGL.h"
#include "Rendering/GL/VertexArrayTypes.h"
#define MAX_TREE_HEIGHT 60
class CBitmap;
namespace Shader {
struct IProgramObject;
}
class CAdvTreeGenerator
{
public:
~CAdvTreeGenerator();
void Init();
void BindTreeBuffer(unsigned int treeType) const;
void DrawTreeBuffer(unsigned int treeType) const;
unsigned int GetBushBuffer() const { return treeVBOs[0]; }
unsigned int GetPineBuffer() const { return treeVBOs[1]; }
unsigned int GetBarkTex() const { return barkTex; }
private:
bool CopyBarkTexMem(const std::string& barkTexFile);
bool GenBarkTextures(const std::string& leafTexFile);
void GenVertexBuffers();
void CreateBushLeaves(const float3& start, const float3& dir, float length, float3& orto1, float3& orto2);
void BushTrunkIterator(const float3& start, const float3& dir, float length, float size, int depth);
void DrawBushTrunk(const float3& start, const float3& end, const float3& orto1, const float3& orto2, float size);
void DrawPineTrunk(const float3& start, const float3& end, float size);
void DrawPineBranch(const float3& start, const float3& dir, float size);
void CreateGranTexBranch(const float3& start, const float3& end);
void GenPineTree(int numBranch, float height);
void GenBushTree(int numBranch, float height, float width);
void CreateGranTex(uint8_t* data, int xpos, int ypos, int xsize);
void CreateLeafTex(uint8_t* data, int xpos, int ypos, int xsize);
private:
constexpr static unsigned int NUM_TREE_TYPES = 8; // FIXME: duplicated from ITreeDrawer.h
constexpr static unsigned int MAX_TREE_VERTS = 2048; // number of vertices per randomized subtype
VA_TYPE_TN* prvVertPtr = nullptr;
VA_TYPE_TN* curVertPtr = nullptr;
size_t numTreeVerts[NUM_TREE_TYPES * 2] = {0};
GLuint treeVBOs[2] = {0, 0};
GLuint treeVAOs[2] = {0, 0};
GLuint barkTex = 0;
};
#endif // _ADV_TREE_GENERATOR_H
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