ddnet/src/game/client/animstate.cpp

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/* (c) Magnus Auvinen. See licence.txt in the root of the distribution for more information. */
/* If you are missing that file, acquire a complete release at teeworlds.com. */
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#include <base/math.h>
#include <game/generated/protocol.h>
#include <game/generated/client_data.h>
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#include "animstate.h"
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static void AnimSeqEval(CAnimSequence *pSeq, float Time, CAnimKeyframe *pFrame)
{
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if(pSeq->m_NumFrames == 0)
{
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pFrame->m_Time = 0;
pFrame->m_X = 0;
pFrame->m_Y = 0;
pFrame->m_Angle = 0;
}
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else if(pSeq->m_NumFrames == 1)
{
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*pFrame = pSeq->m_aFrames[0];
}
else
{
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//time = maximum(0.0f, minimum(1.0f, time / duration)); // TODO: use clamp
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CAnimKeyframe *pFrame1 = 0;
CAnimKeyframe *pFrame2 = 0;
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float Blend = 0.0f;
// TODO: make this smarter.. binary search
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for (int i = 1; i < pSeq->m_NumFrames; i++)
{
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if (pSeq->m_aFrames[i-1].m_Time <= Time && pSeq->m_aFrames[i].m_Time >= Time)
{
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pFrame1 = &pSeq->m_aFrames[i-1];
pFrame2 = &pSeq->m_aFrames[i];
Blend = (Time - pFrame1->m_Time) / (pFrame2->m_Time - pFrame1->m_Time);
break;
}
}
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if (pFrame1 && pFrame2)
{
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pFrame->m_Time = Time;
pFrame->m_X = mix(pFrame1->m_X, pFrame2->m_X, Blend);
pFrame->m_Y = mix(pFrame1->m_Y, pFrame2->m_Y, Blend);
pFrame->m_Angle = mix(pFrame1->m_Angle, pFrame2->m_Angle, Blend);
}
}
}
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static void AnimAddKeyframe(CAnimKeyframe *pSeq, CAnimKeyframe *pAdded, float Amount)
{
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pSeq->m_X += pAdded->m_X*Amount;
pSeq->m_Y += pAdded->m_Y*Amount;
pSeq->m_Angle += pAdded->m_Angle*Amount;
}
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static void AnimAdd(CAnimState *pState, CAnimState *pAdded, float Amount)
{
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AnimAddKeyframe(pState->GetBody(), pAdded->GetBody(), Amount);
AnimAddKeyframe(pState->GetBackFoot(), pAdded->GetBackFoot(), Amount);
AnimAddKeyframe(pState->GetFrontFoot(), pAdded->GetFrontFoot(), Amount);
AnimAddKeyframe(pState->GetAttach(), pAdded->GetAttach(), Amount);
}
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void CAnimState::Set(CAnimation *pAnim, float Time)
{
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AnimSeqEval(&pAnim->m_Body, Time, &m_Body);
AnimSeqEval(&pAnim->m_BackFoot, Time, &m_BackFoot);
AnimSeqEval(&pAnim->m_FrontFoot, Time, &m_FrontFoot);
AnimSeqEval(&pAnim->m_Attach, Time, &m_Attach);
}
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void CAnimState::Add(CAnimation *pAnim, float Time, float Amount)
{
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CAnimState Add;
Add.Set(pAnim, Time);
AnimAdd(this, &Add, Amount);
}
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CAnimState *CAnimState::GetIdle()
{
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static CAnimState State;
static bool Init = true;
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if(Init)
{
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State.Set(&g_pData->m_aAnimations[ANIM_BASE], 0);
State.Add(&g_pData->m_aAnimations[ANIM_IDLE], 0, 1.0f);
Init = false;
}
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return &State;
}