247 lines
9.4 KiB
C
247 lines
9.4 KiB
C
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// Copyright 2020 Phyronnaz
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#pragma once
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#include "CoreMinimal.h"
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#include "VoxelGenerators/VoxelGeneratorInstance.h"
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#include "VoxelGenerators/VoxelGeneratorInstance.inl"
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/**
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* Inherit from TVoxelGeneratorInstanceHelper<FYourInstance, UYourClass>, and implement:
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*
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* For the values:
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* inline v_flt GetValueImpl(v_flt X, v_flt Y, v_flt Z, int32 LOD, const FVoxelItemStack& Items) const
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*
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* For the materials:
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* inline FVoxelMaterial GetMaterialImpl(v_flt X, v_flt Y, v_flt Z, int32 LOD, const FVoxelItemStack& Items) const
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*
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* And:
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* TVoxelRange<v_flt> GetValueRangeImpl(const FVoxelIntBox& Bounds, int32 LOD, const FVoxelItemStack& Items) const
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* {
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* return { Min, Max }; // Replace this by the possible values in Bounds
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* }
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*/
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template<
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typename TWorldInstance,
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typename UWorldObject,
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typename TParent = FVoxelGeneratorInstance>
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class TVoxelGeneratorInstanceHelper : public TParent
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{
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public:
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GENERATE_MEMBER_FUNCTION_CHECK(GetValueImpl, v_flt, const, v_flt, v_flt, v_flt, int32, const FVoxelItemStack&);
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GENERATE_MEMBER_FUNCTION_CHECK(GetMaterialImpl, FVoxelMaterial, const, v_flt, v_flt, v_flt, int32, const FVoxelItemStack&);
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GENERATE_MEMBER_FUNCTION_CHECK(GetValueRangeImpl, TVoxelRange<v_flt>, const, const FVoxelIntBox&, int32, const FVoxelItemStack&);
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using FVoxelGeneratorInstance::TOutputFunctionPtr;
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using FVoxelGeneratorInstance::TRangeOutputFunctionPtr;
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using FVoxelGeneratorInstance::FBaseFunctionPtrs;
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using FVoxelGeneratorInstance::FCustomFunctionPtrs;
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using UStaticClass = UWorldObject;
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explicit TVoxelGeneratorInstanceHelper(const UWorldObject* Object, const FCustomFunctionPtrs& CustomFunctionPtrs = {})
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: TParent(
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UWorldObject::StaticClass(),
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Object,
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FBaseFunctionPtrs
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{
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static_cast<TOutputFunctionPtr<v_flt>>(&TWorldInstance::GetValueImpl),
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static_cast<TOutputFunctionPtr<FVoxelMaterial>>(&TWorldInstance::GetMaterialImpl),
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static_cast<TRangeOutputFunctionPtr<v_flt>>(&TWorldInstance::GetValueRangeImpl),
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},
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CustomFunctionPtrs)
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{
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// doesn't work with fwd decl static_assert(TIsDerivedFrom<UWorldObject, UVoxelGenerator>::IsDerived, "UWorldObject needs to inherit from UVoxelGenerator");
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static_assert(THasMemberFunction_GetValueImpl <TWorldInstance>::Value, "Missing 'v_flt GetValueImpl(v_flt X, v_flt Y, v_flt Z, int32 LOD, const FVoxelItemStack& Items) const'");
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static_assert(THasMemberFunction_GetMaterialImpl<TWorldInstance>::Value, "Missing 'FVoxelMaterial GetMaterialImpl(v_flt X, v_flt Y, v_flt Z, int32 LOD, const FVoxelItemStack& Items) const'");
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static_assert(THasMemberFunction_GetValueRangeImpl<TWorldInstance>::Value, "Missing 'TVoxelRange<v_flt> GetValueRangeImpl(const FVoxelIntBox& Bounds, int32 LOD, const FVoxelItemStack& Items) const'");
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}
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virtual void GetValues(TVoxelQueryZone<FVoxelValue>& QueryZone, int32 LOD, const FVoxelItemStack& Items) const override
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, X))
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, Y))
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, Z))
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{
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QueryZone.Set(X, Y, Z, FVoxelValue(This().GetValueImpl(X, Y, Z, LOD, Items)));
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}
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}
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}
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}
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virtual void GetMaterials(TVoxelQueryZone<FVoxelMaterial>& QueryZone, int32 LOD, const FVoxelItemStack& Items) const override
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, X))
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, Y))
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, Z))
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{
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QueryZone.Set(X, Y, Z, This().GetMaterialImpl(X, Y, Z, LOD, Items));
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}
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}
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}
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}
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private:
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inline const TWorldInstance& This() const
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{
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return static_cast<const TWorldInstance&>(*this);
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}
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};
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/**
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* If you want your generator to be placeable as an asset,
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* inherit from TVoxelTransformableGeneratorInstanceHelper<FYourInstance, UYourClass>, and implement:
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*
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* For the values:
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* template<bool bCustomTransform> // bCustomTransform is false if LocalToWorld is identity
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* inline v_flt GetValueImpl(const FTransform& LocalToWorld, v_flt X, v_flt Y, v_flt Z, int32 LOD, const FVoxelItemStack& Items) const
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*
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* For the materials:
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* template<bool bCustomTransform>
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* inline FVoxelMaterial GetMaterialImpl(const FTransform& LocalToWorld, v_flt X, v_flt Y, v_flt Z, int32 LOD, const FVoxelItemStack& Items) const
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*
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* And:
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* template<bool bCustomTransform>
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* TVoxelRange<v_flt> GetValueRangeImpl(const FTransform& LocalToWorld, const FVoxelIntBox& WorldBounds, int32 LOD, const FVoxelItemStack& Items) const
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* {
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* return { Min, Max }; // Replace this by the possible values in Bounds
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* }
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*/
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template<
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typename TWorldInstance,
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typename UWorldObject,
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typename TParent = FVoxelTransformableGeneratorInstance>
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class TVoxelTransformableGeneratorInstanceHelper : public TParent
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{
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public:
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// doesn't work with fwd decl static_assert(TIsDerivedFrom<UWorldObject, UVoxelTransformableGenerator>::IsDerived, "UWorldObject needs to inherit from UVoxelTransformableGenerator");
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using FVoxelGeneratorInstance::TOutputFunctionPtr;
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using FVoxelGeneratorInstance::TRangeOutputFunctionPtr;
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using FVoxelTransformableGeneratorInstance::TOutputFunctionPtr_Transform;
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using FVoxelTransformableGeneratorInstance::TRangeOutputFunctionPtr_Transform;
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using FVoxelGeneratorInstance::FBaseFunctionPtrs;
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using FVoxelGeneratorInstance::FCustomFunctionPtrs;
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using FVoxelTransformableGeneratorInstance::FBaseFunctionPtrs_Transform;
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using FVoxelTransformableGeneratorInstance::FCustomFunctionPtrs_Transform;
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using UStaticClass = UWorldObject;
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explicit TVoxelTransformableGeneratorInstanceHelper(
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const UWorldObject* Object,
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const FCustomFunctionPtrs& CustomFunctionPtrs = {},
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const FCustomFunctionPtrs_Transform& CustomFunctionPtrs_Transform = {})
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: TParent(
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UWorldObject::StaticClass(),
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Object,
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FBaseFunctionPtrs
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{
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static_cast<TOutputFunctionPtr<v_flt>>(&TWorldInstance::GetValueNoTransformImpl),
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static_cast<TOutputFunctionPtr<FVoxelMaterial>>(&TWorldInstance::GetMaterialNoTransformImpl),
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static_cast<TRangeOutputFunctionPtr<v_flt>>(&TWorldInstance::GetValueRangeNoTransformImpl),
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},
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CustomFunctionPtrs,
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FBaseFunctionPtrs_Transform
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{
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static_cast<TOutputFunctionPtr_Transform<v_flt>>(&TWorldInstance::GetValueWithTransformImpl),
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static_cast<TOutputFunctionPtr_Transform<FVoxelMaterial>>(&TWorldInstance::GetMaterialWithTransformImpl),
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static_cast<TRangeOutputFunctionPtr_Transform<v_flt>>(&TWorldInstance::GetValueRangeWithTransformImpl),
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},
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CustomFunctionPtrs_Transform)
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{
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}
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virtual void GetValues(TVoxelQueryZone<FVoxelValue>& QueryZone, int32 LOD, const FVoxelItemStack& Items) const override
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, X))
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, Y))
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, Z))
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{
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QueryZone.Set(X, Y, Z, FVoxelValue(This().GetValueNoTransformImpl(X, Y, Z, LOD, Items)));
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}
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}
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}
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}
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virtual void GetMaterials(TVoxelQueryZone<FVoxelMaterial>& QueryZone, int32 LOD, const FVoxelItemStack& Items) const override
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, X))
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, Y))
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, Z))
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{
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QueryZone.Set(X, Y, Z, This().GetMaterialNoTransformImpl(X, Y, Z, LOD, Items));
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}
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}
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}
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}
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virtual void GetValues_Transform(const FTransform& LocalToWorld, TVoxelQueryZone<FVoxelValue>& QueryZone, int32 LOD, const FVoxelItemStack& Items) const override
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, X))
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, Y))
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, Z))
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{
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QueryZone.Set(X, Y, Z, FVoxelValue(This().GetValueWithTransformImpl(LocalToWorld, X, Y, Z, LOD, Items)));
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}
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}
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}
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}
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virtual void GetMaterials_Transform(const FTransform& LocalToWorld, TVoxelQueryZone<FVoxelMaterial>& QueryZone, int32 LOD, const FVoxelItemStack& Items) const override
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, X))
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, Y))
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{
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for (VOXEL_QUERY_ZONE_ITERATE(QueryZone, Z))
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{
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QueryZone.Set(X, Y, Z, This().GetMaterialWithTransformImpl(LocalToWorld, X, Y, Z, LOD, Items));
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}
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}
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}
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}
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v_flt GetValueNoTransformImpl(v_flt X, v_flt Y, v_flt Z, int32 LOD, const FVoxelItemStack& Items) const
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{
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return This().template GetValueImpl<false>(FTransform(), X, Y, Z, LOD, Items);
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}
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v_flt GetValueWithTransformImpl(const FTransform& LocalToWorld, v_flt X, v_flt Y, v_flt Z, int32 LOD, const FVoxelItemStack& Items) const
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{
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return This().template GetValueImpl<true>(LocalToWorld, X, Y, Z, LOD, Items);
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}
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FVoxelMaterial GetMaterialNoTransformImpl(v_flt X, v_flt Y, v_flt Z, int32 LOD, const FVoxelItemStack& Items) const
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{
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return This().template GetMaterialImpl<false>(FTransform(), X, Y, Z, LOD, Items);
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}
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FVoxelMaterial GetMaterialWithTransformImpl(const FTransform& LocalToWorld, v_flt X, v_flt Y, v_flt Z, int32 LOD, const FVoxelItemStack& Items) const
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{
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return This().template GetMaterialImpl<true>(LocalToWorld, X, Y, Z, LOD, Items);
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}
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TVoxelRange<v_flt> GetValueRangeNoTransformImpl(const FVoxelIntBox& WorldBounds, int32 LOD, const FVoxelItemStack& Items) const
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{
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return This().template GetValueRangeImpl<false>(FTransform(), WorldBounds, LOD, Items);
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}
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TVoxelRange<v_flt> GetValueRangeWithTransformImpl(const FTransform& LocalToWorld, const FVoxelIntBox& WorldBounds, int32 LOD, const FVoxelItemStack& Items) const
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{
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return This().template GetValueRangeImpl<true>(LocalToWorld, WorldBounds, LOD, Items);
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}
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private:
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inline const TWorldInstance& This() const
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{
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return static_cast<const TWorldInstance&>(*this);
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}
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};
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