Method createNormalPaintStruct

src/OpenLoco/src/Paint/Paint.cpp:556–597

    }

    PaintStruct* PaintSession::createNormalPaintStruct(ImageId imageId, const World::Pos3& offset, const World::Pos3& boundBoxOffset, const World::Pos3& boundBoxSize)
    {
        auto* const g1 = Gfx::getG1Element(imageId.getIndex());
        if (g1 == nullptr)
        {
            return nullptr;
        }

        const auto swappedRotation = directionFlipXAxis(currentRotation);
        auto swappedRotCoord = World::Pos3{ Math::Vector::rotate(offset, swappedRotation), offset.z };
        swappedRotCoord += World::Pos3{ getSpritePosition(), 0 };

        const auto vpPos = World::gameToScreen(swappedRotCoord, currentRotation);

        if (!imageWithinRT(vpPos, *g1, *_renderTarget))
        {
            return nullptr;
        }

        const auto rotBoundBoxOffset = World::Pos3{ Math::Vector::rotate(boundBoxOffset, swappedRotation), boundBoxOffset.z };
        const auto rotBoundBoxSize = rotateBoundBoxSize(boundBoxSize, currentRotation);

        auto* ps = allocatePaintStruct<PaintStruct>();
        if (ps == nullptr)
        {
            return nullptr;
        }

        const auto spritePos = getSpritePosition();
        ps->imageId = imageId;
        ps->vpPos = { vpPos.x, vpPos.y };
        ps->bounds.mins = rotBoundBoxOffset + World::Pos3{ spritePos.x, spritePos.y, 0 };
        ps->bounds.maxs = rotBoundBoxOffset + rotBoundBoxSize + World::Pos3{ spritePos.x, spritePos.y, 0 };
        ps->flags = PaintStructFlags::none;
        ps->attachedPS = nullptr;
        ps->children = nullptr;
        ps->type = _itemType;
        ps->modId = _trackModId;
        ps->mapPos = _mapPosition;
        ps->tileElement = reinterpret_cast<World::TileElement*>(_currentItem);
        return ps;
    }

    // 0x004622A2
    void PaintSession::generate()