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104 lines
4.0 KiB
C++
104 lines
4.0 KiB
C++
/*
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* Copyright (c) Contributors to the Open 3D Engine Project
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*
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* SPDX-License-Identifier: Apache-2.0 OR MIT
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*
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*/
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#include <PostProcess/ShapeWeightModifier/ShapeWeightModifierComponentController.h>
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#include <LmbrCentral/Shape/ShapeComponentBus.h>
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namespace AZ
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{
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namespace Render
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{
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void ShapeWeightModifierComponentController::Reflect(AZ::ReflectContext* context)
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{
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ShapeWeightModifierComponentConfig::Reflect(context);
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if (auto* serializeContext = azrtti_cast<SerializeContext*>(context))
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{
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serializeContext->Class<ShapeWeightModifierComponentController>()
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->Version(0)
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->Field("Configuration", &ShapeWeightModifierComponentController::m_configuration);
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}
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if (AZ::BehaviorContext* behaviorContext = azrtti_cast<AZ::BehaviorContext*>(context))
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{
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}
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}
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void ShapeWeightModifierComponentController::GetProvidedServices(AZ::ComponentDescriptor::DependencyArrayType& provided)
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{
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provided.push_back(AZ_CRC_CE("PostFXWeightModifierService"));
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}
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void ShapeWeightModifierComponentController::GetIncompatibleServices(AZ::ComponentDescriptor::DependencyArrayType& incompatible)
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{
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incompatible.push_back(AZ_CRC_CE("PostFXWeightModifierService"));
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}
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void ShapeWeightModifierComponentController::GetRequiredServices(AZ::ComponentDescriptor::DependencyArrayType& required)
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{
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required.push_back(AZ_CRC_CE("PostFXLayerService"));
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required.push_back(AZ_CRC("ShapeService", 0xe86aa5fe));
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}
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ShapeWeightModifierComponentController::ShapeWeightModifierComponentController(const ShapeWeightModifierComponentConfig& config)
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: m_configuration(config)
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{
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}
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void ShapeWeightModifierComponentController::Activate(EntityId entityId)
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{
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m_entityId = entityId;
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PostFxWeightRequestBus::Handler::BusConnect(m_entityId);
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}
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void ShapeWeightModifierComponentController::Deactivate()
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{
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PostFxWeightRequestBus::Handler::BusDisconnect(m_entityId);
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m_entityId.SetInvalid();
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}
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void ShapeWeightModifierComponentController::SetConfiguration(const ShapeWeightModifierComponentConfig& config)
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{
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m_configuration = config;
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}
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// Implementation taken from GradientSignal Gem
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float ShapeWeightModifierComponentController::GetWeightAtPosition(const AZ::Vector3& influencerPosition) const
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{
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float distance = 0.0f;
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LmbrCentral::ShapeComponentRequestsBus::EventResult(distance, m_entityId, &LmbrCentral::ShapeComponentRequestsBus::Events::DistanceFromPoint, influencerPosition);
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// In the special case of 0 falloff, make sure that all points inside the shape (0 distance) return
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// 1.0, and all points outside the shape return 0.
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if (m_configuration.m_falloffDistance == 0.0f)
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{
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return (distance > 0.0f) ? 0.0f : 1.0f;
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}
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// Since this is outer falloff, distance should give us values from 1.0 at the minimum distance
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// to 0.0 at the maximum distance.
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return GetRatio(m_configuration.m_falloffDistance, 0.0f, distance);
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}
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// Implementation taken from GradientSignal Gem
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float ShapeWeightModifierComponentController::GetRatio(float maxRange, float minRange, float distance) const
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{
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// If our min/max range is equal, GetRatio() would end up dividing by infinity, so in this case
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// make sure that everything below or equal to the min/max value is 0.0, and everything above it is 1.0.
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if (maxRange == minRange)
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{
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return (distance <= minRange) ? 0.0f : 1.0f;
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}
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return AZ::GetClamp((distance - maxRange) / (minRange - maxRange), 0.0f, 1.0f);
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}
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}
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}
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