mirror of https://github.com/axmolengine/axmol.git
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
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/*
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Copyright 2010 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License 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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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#ifndef SkFlingState_DEFINED
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#define SkFlingState_DEFINED
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#include "SkScalar.h"
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#include "SkPoint.h"
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class SkMatrix;
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struct FlingState {
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FlingState() : fActive(false) {}
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bool isActive() const { return fActive; }
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void stop() { fActive = false; }
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void reset(float sx, float sy);
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bool evaluateMatrix(SkMatrix* matrix);
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private:
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SkPoint fDirection;
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SkScalar fSpeed0;
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double fTime0;
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bool fActive;
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};
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class GrAnimateFloat {
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public:
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GrAnimateFloat();
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void start(float v0, float v1, float duration);
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bool isActive() const { return fTime0 != 0; }
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void stop() { fTime0 = 0; }
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float evaluate();
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private:
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float fValue0, fValue1, fDuration;
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SkMSec fTime0;
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};
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#endif
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