From 9982f1f21bca3bb51ac7d31cede606beef5c0f67 Mon Sep 17 00:00:00 2001
From: aap <aap@papnet.eu>
Date: Fri, 18 Dec 2020 23:46:51 +0100
Subject: anim compression

---
 src/animation/AnimBlendNode.cpp | 127 ++++++++++++++++++++++++++++++++++++++--
 1 file changed, 123 insertions(+), 4 deletions(-)

(limited to 'src/animation/AnimBlendNode.cpp')

diff --git a/src/animation/AnimBlendNode.cpp b/src/animation/AnimBlendNode.cpp
index ac1328eb..62423004 100644
--- a/src/animation/AnimBlendNode.cpp
+++ b/src/animation/AnimBlendNode.cpp
@@ -47,6 +47,44 @@ CAnimBlendNode::Update(CVector &trans, CQuaternion &rot, float weight)
 	return looped;
 }
 
+bool
+CAnimBlendNode::UpdateCompressed(CVector &trans, CQuaternion &rot, float weight)
+{
+	bool looped = false;
+
+	trans = CVector(0.0f, 0.0f, 0.0f);
+	rot = CQuaternion(0.0f, 0.0f, 0.0f, 0.0f);
+
+	if(association->IsRunning()){
+		remainingTime -= association->timeStep;
+		if(remainingTime <= 0.0f)
+			looped = NextKeyFrameCompressed();
+	}
+
+	float blend = association->GetBlendAmount(weight);
+	if(blend > 0.0f){
+		KeyFrameTransCompressed *kfA = (KeyFrameTransCompressed*)sequence->GetKeyFrameCompressed(frameA);
+		KeyFrameTransCompressed *kfB = (KeyFrameTransCompressed*)sequence->GetKeyFrameCompressed(frameB);
+		float t = kfA->deltaTime == 0 ? 0.0f : (kfA->GetDeltaTime() - remainingTime)/kfA->GetDeltaTime();
+		if(sequence->type & CAnimBlendSequence::KF_TRANS){
+			CVector transA, transB;
+			kfA->GetTranslation(&transA);
+			kfB->GetTranslation(&transB);
+			trans = transB + t*(transA - transB);
+			trans *= blend;
+		}
+		if(sequence->type & CAnimBlendSequence::KF_ROT){
+			CQuaternion rotA, rotB;
+			kfA->GetRotation(&rotA);
+			kfB->GetRotation(&rotB);
+			rot.Slerp(rotB, rotA, theta, invSin, t);
+			rot *= blend;
+		}
+	}
+
+	return looped;
+}
+
 bool
 CAnimBlendNode::NextKeyFrame(void)
 {
@@ -84,6 +122,43 @@ CAnimBlendNode::NextKeyFrame(void)
 	return looped;
 }
 
+bool
+CAnimBlendNode::NextKeyFrameCompressed(void)
+{
+	bool looped;
+
+	if(sequence->numFrames <= 1)
+		return false;
+
+	looped = false;
+	frameB = frameA;
+
+	// Advance as long as we have to
+	while(remainingTime <= 0.0f){
+		frameA++;
+
+		if(frameA >= sequence->numFrames){
+			// reached end of animation
+			if(!association->IsRepeating()){
+				frameA--;
+				remainingTime = 0.0f;
+				return false;
+			}
+			looped = true;
+			frameA = 0;
+		}
+
+		remainingTime += sequence->GetKeyFrameCompressed(frameA)->GetDeltaTime();
+	}
+
+	frameB = frameA - 1;
+	if(frameB < 0)
+		frameB += sequence->numFrames;
+
+	CalcDeltasCompressed();
+	return looped;
+}
+
 // Set animation to time t
 bool
 CAnimBlendNode::FindKeyFrame(float t)
@@ -132,7 +207,7 @@ CAnimBlendNode::SetupKeyFrameCompressed(void)
 		frameA = 0;
 		remainingTime = 0.0f;
 	}else
-		remainingTime = sequence->GetKeyFrameCompressed(frameA)->deltaTime/60.0f;
+		remainingTime = sequence->GetKeyFrameCompressed(frameA)->GetDeltaTime();
 
 	CalcDeltasCompressed();
 	return true;
@@ -157,9 +232,17 @@ CAnimBlendNode::CalcDeltasCompressed(void)
 {
 	if((sequence->type & CAnimBlendSequence::KF_ROT) == 0)
 		return;
-	KeyFrame *kfA = sequence->GetKeyFrameCompressed(frameA);
-	KeyFrame *kfB = sequence->GetKeyFrameCompressed(frameB);
-	float cos = DotProduct(kfA->rotation, kfB->rotation);
+	KeyFrameCompressed *kfA = sequence->GetKeyFrameCompressed(frameA);
+	KeyFrameCompressed *kfB = sequence->GetKeyFrameCompressed(frameB);
+	CQuaternion rotA, rotB;
+	kfA->GetRotation(&rotA);
+	kfB->GetRotation(&rotB);
+	float cos = DotProduct(rotA, rotB);
+	if(cos < 0.0f){
+		rotB *= -1.0f;
+		kfB->SetRotation(rotB);
+	}
+	cos = DotProduct(rotA, rotB);
 	if(cos > 1.0f)
 		cos = 1.0f;
 	theta = Acos(cos);
@@ -183,6 +266,26 @@ CAnimBlendNode::GetCurrentTranslation(CVector &trans, float weight)
 	}
 }
 
+void
+CAnimBlendNode::GetCurrentTranslationCompressed(CVector &trans, float weight)
+{
+	trans = CVector(0.0f, 0.0f, 0.0f);
+
+	float blend = association->GetBlendAmount(weight);
+	if(blend > 0.0f){
+		KeyFrameTransCompressed *kfA = (KeyFrameTransCompressed*)sequence->GetKeyFrameCompressed(frameA);
+		KeyFrameTransCompressed *kfB = (KeyFrameTransCompressed*)sequence->GetKeyFrameCompressed(frameB);
+		float t = kfA->deltaTime == 0 ? 0.0f : (kfA->GetDeltaTime() - remainingTime)/kfA->GetDeltaTime();
+		if(sequence->type & CAnimBlendSequence::KF_TRANS){
+			CVector transA, transB;
+			kfA->GetTranslation(&transA);
+			kfB->GetTranslation(&transB);
+			trans = transB + t*(transA - transB);
+			trans *= blend;
+		}
+	}
+}
+
 void
 CAnimBlendNode::GetEndTranslation(CVector &trans, float weight)
 {
@@ -195,3 +298,19 @@ CAnimBlendNode::GetEndTranslation(CVector &trans, float weight)
 			trans = kf->translation * blend;
 	}
 }
+
+void
+CAnimBlendNode::GetEndTranslationCompressed(CVector &trans, float weight)
+{
+	trans = CVector(0.0f, 0.0f, 0.0f);
+
+	float blend = association->GetBlendAmount(weight);
+	if(blend > 0.0f){
+		KeyFrameTransCompressed *kf = (KeyFrameTransCompressed*)sequence->GetKeyFrameCompressed(sequence->numFrames-1);
+		if(sequence->type & CAnimBlendSequence::KF_TRANS){
+			CVector trans;
+			kf->GetTranslation(&trans);
+			trans = trans * blend;
+		}
+	}
+}
-- 
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