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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef _ADV_TREE_DRAWER_H_
#define _ADV_TREE_DRAWER_H_
#include <array>
#include "ITreeDrawer.h"
#include "AdvTreeGenerator.h"
#include "System/type2.h"
class CCamera;
namespace Shader {
struct IProgramObject;
}
class CAdvTreeDrawer: public ITreeDrawer
{
public:
CAdvTreeDrawer();
~CAdvTreeDrawer();
void LoadTreeShaders();
void SetupDrawState();
void SetupDrawState(const CCamera* cam, Shader::IProgramObject* ipo);
void ResetDrawState();
void SetupShadowDrawState();
void SetupShadowDrawState(const CCamera* cam, Shader::IProgramObject* ipo);
void ResetShadowDrawState();
void DrawTrees(const CCamera* cam, Shader::IProgramObject* ipo);
void DrawFallingTrees(const CCamera* cam, Shader::IProgramObject* ipo) const;
void Update() override;
void DrawPass() override;
void DrawShadowPass() override;
void DrawTree(const TreeStruct& ts, int treeMatIdx);
void DrawTree(const float3& pos, int treeType, int treeMatIdx);
void BindTreeGeometry(int treeType) const;
void DrawTreeGeometry(int treeType) const;
void AddFallingTree(int treeID, int treeType, const float3& pos, const float3& dir) override;
struct FallingTree {
int id;
int type;
CMatrix44f fallMat;
float3 fallDir;
float fallSpeed;
float fallAngle;
};
static constexpr int TREE_MAT_IDX = 14;
static constexpr int VIEW_MAT_IDX = 15;
static constexpr int PROJ_MAT_IDX = 16;
private:
enum TreeShaderProgram {
TREE_PROGRAM_BASIC = 0, // shader (V) without self-shadowing
TREE_PROGRAM_SHADOW = 1, // shader (V+F) with self-shadowing
TREE_PROGRAM_ACTIVE = 2,
TREE_PROGRAM_LAST = 3
};
std::array<Shader::IProgramObject*, TREE_PROGRAM_LAST> treeShaders;
std::vector<FallingTree> fallingTrees[2];
CAdvTreeGenerator treeGen;
float3 prvUpdateCamPos;
float3 prvUpdateCamDir;
bool updateVisibility = false;
};
#endif // _ADV_TREE_DRAWER_H_
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