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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef _BASIC_MESH_DRAWER_H_
#define _BASIC_MESH_DRAWER_H_
#include <array>
#include <vector>
#include "Map/MapDrawPassTypes.h"
#include "Map/SMF/IMeshDrawer.h"
#include "Rendering/GL/VAO.h"
#include "Rendering/GL/VBO.h"
#include "System/EventClient.h"
class CSMFGroundDrawer;
class CCamera;
class CBasicMeshDrawer : public IMeshDrawer, public CEventClient {
public:
bool WantsEvent(const std::string& eventName) override { return (eventName == "UnsyncedHeightMapUpdate"); }
bool GetFullRead() const override { return true; }
int GetReadAllyTeam() const override { return AllAccessTeam; }
public:
CBasicMeshDrawer(CSMFGroundDrawer* gd);
~CBasicMeshDrawer();
static constexpr int32_t PATCH_SIZE = 128; // must match SMFReadMap::bigSquareSize
static constexpr int32_t LOD_LEVELS = 8; // log2(PATCH_SIZE) + 1; 129x129 to 2x2
enum {
MAP_BORDER_L = 0,
MAP_BORDER_R = 1,
MAP_BORDER_T = 2,
MAP_BORDER_B = 3,
};
struct MeshBuffer {
VAO vao;
VBO vbo;
};
struct MeshPatch {
std::array<MeshBuffer, LOD_LEVELS> squareVertexBuffers;
// std::array<MeshBuffer, LOD_LEVELS> squareNormalBuffers;
std::array<MeshBuffer, LOD_LEVELS> borderVertexBuffers[MAP_BORDER_B + 1];
// std::array<MeshBuffer, LOD_LEVELS> borderNormalBuffers[MAP_BORDER_B + 1];
std::array<float3*, LOD_LEVELS> squareVertexPtrs;
// std::array<float3*, LOD_LEVELS> squareNormalPtrs;
std::array<uint32_t, 4> visUpdateFrames; // [CAMTYPE_PLAYER, CAMTYPE_ENVMAP]
std::array<uint32_t, 1> uhmUpdateFrames;
};
void Update(const DrawPass::e& drawPass);
void Update() override {}
void UnsyncedHeightMapUpdate(const SRectangle& rect) override;
void DrawMesh(const DrawPass::e& drawPass) override;
void DrawBorderMesh(const DrawPass::e& drawPass) override;
private:
void UploadPatchSquareGeometry(uint32_t n, uint32_t px, uint32_t py, const float* chm, const float3* cnm);
void UploadPatchBorderGeometry(uint32_t n, uint32_t px, uint32_t py, const float* chm, const float3* cnm);
void UploadPatchIndices(uint32_t n);
void DrawSquareMeshPatch(const MeshPatch& meshPatch, const CCamera* activeCam) const;
void DrawBorderMeshPatch(const MeshPatch& meshPatch, const CCamera* activeCam, uint32_t borderSide) const;
uint32_t CalcDrawPassLOD(const CCamera* cam, const DrawPass::e& drawPass) const;
private:
uint32_t numPatchesX;
uint32_t numPatchesY;
uint32_t drawPassLOD;
std::vector<MeshPatch> meshPatches;
std::array<float, LOD_LEVELS> lodDistTable;
std::array<VBO, LOD_LEVELS> lodSquareIndexBuffers;
std::array<VBO, LOD_LEVELS> lodBorderIndexBuffers;
CSMFGroundDrawer* smfGroundDrawer;
};
#endif
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