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55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
//
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// AnimBlendLinear.h
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//
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// Created by Anthony J. Thibault on 9/2/15.
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// Copyright (c) 2015 High Fidelity, Inc. All rights reserved.
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//
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// Distributed under the Apache License, Version 2.0.
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// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
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//
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#ifndef hifi_AnimBlendLinear_h
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#define hifi_AnimBlendLinear_h
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#include "AnimNode.h"
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// Linear blend between two AnimNodes.
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// the amount of blending is determined by the alpha parameter.
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// If the number of children is 2, then the alpha parameters should be between
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// 0 and 1. The first animation will have a (1 - alpha) factor, and the second
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// will have factor of alpha.
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// This node supports more then 2 children. In this case the alpha should be
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// between 0 and n - 1. This alpha can be used to linearly interpolate between
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// the closest two children poses. This can be used to sweep through a series
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// of animation poses.
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class AnimBlendLinear : public AnimNode {
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public:
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friend class AnimTests;
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AnimBlendLinear(const QString& id, float alpha);
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virtual ~AnimBlendLinear() override;
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virtual const AnimPoseVec& evaluate(const AnimVariantMap& animVars, const AnimContext& context, float dt, AnimVariantMap& triggersOut) override;
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void setAlphaVar(const QString& alphaVar) { _alphaVar = alphaVar; }
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protected:
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// for AnimDebugDraw rendering
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virtual const AnimPoseVec& getPosesInternal() const override;
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void evaluateAndBlendChildren(const AnimVariantMap& animVars, const AnimContext& context, AnimVariantMap& triggersOut, float alpha,
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size_t prevPoseIndex, size_t nextPoseIndex, float dt);
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AnimPoseVec _poses;
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float _alpha;
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QString _alphaVar;
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// no copies
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AnimBlendLinear(const AnimBlendLinear&) = delete;
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AnimBlendLinear& operator=(const AnimBlendLinear&) = delete;
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};
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#endif // hifi_AnimBlendLinear_h
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