Chris Burel
60 lines
2.0 KiB
C++
60 lines
2.0 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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*/
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#pragma once
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#include <AzCore/Component/EntityId.h>
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#include <AzCore/Memory/Memory.h>
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#include <AzCore/RTTI/ReflectContext.h>
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#include <AzCore/RTTI/RTTI.h>
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#include <AzCore/Serialization/EditContextConstants.inl>
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#include <GradientSignal/GradientSampler.h>
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#include <GradientSignal/Util.h>
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namespace GradientSignal
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{
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class SmoothStep final
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{
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public:
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AZ_CLASS_ALLOCATOR(SmoothStep, AZ::SystemAllocator, 0);
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AZ_RTTI(SmoothStep, "{F392F061-BF40-43C5-89F6-7323D6EF11F4}");
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static void Reflect(AZ::ReflectContext* context);
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inline float GetSmoothedValue(float inputValue) const;
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float m_falloffMidpoint = 0.5f;
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float m_falloffRange = 0.5f;
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float m_falloffStrength = 0.25f;
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};
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inline float SmoothStep::GetSmoothedValue(float inputValue) const
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{
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float output = 0.0f;
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const float value = AZ::GetClamp(inputValue, 0.0f, 1.0f);
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const float valueFalloffRange = AZ::GetClamp(m_falloffRange, 0.0f, 1.0f);
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const float valueFalloffStrength = AZ::GetClamp(m_falloffStrength, 0.0f, 1.0f);
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float min = m_falloffMidpoint - m_falloffRange / 2.0f;
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float max = m_falloffMidpoint + m_falloffRange / 2.0f;
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float result1 = GetRatio(min, min + valueFalloffStrength, value);
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result1 = GetSmoothStep(result1);
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float result2 = GetRatio(max - valueFalloffStrength, max, value);
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result2 = GetSmoothStep(result2);
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output = result1 * (1.0f - result2);
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return output;
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}
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}
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