GtsMeshSplitter.h

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#pragma once
 
#include "common/Result.h"
#include "procgen/MeshBuild.h"
#include <memory>
#include <vector>
 
namespace eve::procgen {
 
enum class GtsMeshPivot { None=0, MinimumXZ=1, CenterXZ=2 };
 
struct GtsMeshSplitTile {
    MeshBuild mesh;
    float offsetX=0.f,offsetZ=0.f;
};
 
class EVENGINE_API_DOMAINS GtsMeshSplitResult {
public:
    int getColumnCount() const noexcept { return columns_; }
    int getRowCount() const noexcept { return rows_; }
    int getTileCount() const noexcept { return static_cast<int>(tiles_.size()); }
    const GtsMeshSplitTile* tileAt(int index) const noexcept;
    [[nodiscard]] std::unique_ptr<MeshBuild> copyTileMesh(int index) const;
    float getTileOffsetX(int index) const noexcept;
    float getTileOffsetZ(int index) const noexcept;
private:
    friend EVENGINE_API_DOMAINS Result<GtsMeshSplitResult> splitGtsMesh(const MeshBuild&, int, int, GtsMeshPivot);
    friend Result<void> splitGtsMeshInto(GtsMeshSplitResult&,const MeshBuild&,int,int,GtsMeshPivot);
    int columns_=0,rows_=0;
    std::vector<GtsMeshSplitTile> tiles_;
};
 
[[nodiscard]] EVENGINE_API_DOMAINS Result<GtsMeshSplitResult> splitGtsMesh(const MeshBuild& source, int xSplits,
                                                                           int          zSplits,
                                                                           GtsMeshPivot pivot = GtsMeshPivot::None);
[[nodiscard]] Result<void> splitGtsMeshInto(GtsMeshSplitResult& output,const MeshBuild& source,
                                            int xSplits,int zSplits,GtsMeshPivot pivot=GtsMeshPivot::None);
}