70 lines
1.5 KiB
C++
70 lines
1.5 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file cLerpInterval.h
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* @author drose
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* @date 2002-08-27
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*/
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#ifndef CLERPINTERVAL_H
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#define CLERPINTERVAL_H
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#include "directbase.h"
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#include "cInterval.h"
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/**
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* The base class for a family of intervals that linearly interpolate one or
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* more numeric values over time.
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*/
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class EXPCL_DIRECT_INTERVAL CLerpInterval : public CInterval {
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PUBLISHED:
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enum BlendType {
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BT_no_blend,
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BT_ease_in,
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BT_ease_out,
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BT_ease_in_out,
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BT_invalid
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};
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public:
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INLINE CLerpInterval(const std::string &name, double duration,
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BlendType blend_type);
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PUBLISHED:
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INLINE BlendType get_blend_type() const;
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static BlendType string_blend_type(const std::string &blend_type);
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protected:
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double compute_delta(double t) const;
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private:
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BlendType _blend_type;
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public:
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static TypeHandle get_class_type() {
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return _type_handle;
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}
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static void init_type() {
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CInterval::init_type();
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register_type(_type_handle, "CLerpInterval",
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CInterval::get_class_type());
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}
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virtual TypeHandle get_type() const {
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return get_class_type();
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}
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virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
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private:
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static TypeHandle _type_handle;
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};
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#include "cLerpInterval.I"
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#endif
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