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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
#ifndef HSINTERP_inc
#define HSINTERP_inc
#include "HeadSpin.h"
#include "hsKeys.h"
///////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////
//
// Performs interpolation of keyframes & values.
// t param should be 0-1
//
struct hsColorRGBA;
class hsAffineParts;
class hsInterp
{
public:
enum IgnoreFlags
{
kIgnoreAlpha = 0x1,
kIgnoreLastMatRow = 0x2,
kIgnorePartsPos = 0x4,
kIgnorePartsRot = 0x8,
kIgnorePartsScale = 0x10, // result gets no scale
kIgnorePartsDet = 0x20,
kPreservePartsScale = 0x40 // result gets the scale of key1
};
static void BezScalarEval(const hsScalar value1, const hsScalar outTan,
const hsScalar value2, const hsScalar inTan,
const hsScalar t, const hsScalar scale, hsScalar *result);
static void BezInterp(const hsBezPoint3Key *k1, const hsBezPoint3Key *k2, const hsScalar t, hsScalarTriple *result);
static void BezInterp(const hsBezScalarKey *k1, const hsBezScalarKey *k2, const hsScalar t, hsScalar *result);
static void BezInterp(const hsBezScaleKey *k1, const hsBezScaleKey *k2, const hsScalar t, hsScaleValue *result);
// simple linear interpolation
static void LinInterp(const hsScalar k1, const hsScalar k2, const hsScalar t, hsScalar *result);
static void LinInterp(const hsScalarTriple *k1, const hsScalarTriple *k2, const hsScalar t, hsScalarTriple *result);
static void LinInterp(const hsColorRGBA *k1, const hsColorRGBA *k2, const hsScalar t, hsColorRGBA *result, UInt32 ignoreFlags=0);
static void LinInterp(const hsMatrix33 *k1, const hsMatrix33 *k2, const hsScalar t, hsMatrix33 *result, UInt32 ignoreFlags=0);
static void LinInterp(const hsMatrix44 *mat1, const hsMatrix44 *mat2, const hsScalar t, hsMatrix44 *out, UInt32 ignoreFlags=0);
static void LinInterp(const hsQuat *k1, const hsQuat *k2, const hsScalar t, hsQuat *result);
static void LinInterp(const hsScaleValue *k1, const hsScaleValue *k2, const hsScalar t, hsScaleValue *result);
static void LinInterp(const hsAffineParts *k1, const hsAffineParts *k2, const hsScalar t, hsAffineParts *result, UInt32 ignoreFlags=0);
// Given a time value, find the enclosing keyframes and normalize time (0-1)
static void GetBoundaryKeyFrames(hsScalar time, UInt32 numKeys, void *keys,
UInt32 keySize, hsKeyFrame **kF1, hsKeyFrame **kF2, UInt32 *lastKeyIdx, hsScalar *p, hsBool forwards);
};
#define MAX_FRAMES_PER_SEC 30.0f
#define MAX_TICKS_PER_FRAME 160.0f
#define MAX_TICKS_PER_SEC (MAX_TICKS_PER_FRAME*MAX_FRAMES_PER_SEC)
#endif // #ifndef HSINTERP_inc