From 3564b85b4e354272cea8a8217f9e27827a043d7a Mon Sep 17 00:00:00 2001
From: aap <aap@papnet.eu>
Date: Mon, 16 Nov 2020 22:43:15 +0100
Subject: animation compression from PS2

---
 src/animation/AnimBlendSequence.cpp | 104 ++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)

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

diff --git a/src/animation/AnimBlendSequence.cpp b/src/animation/AnimBlendSequence.cpp
index 4578ec50..d35fbc46 100644
--- a/src/animation/AnimBlendSequence.cpp
+++ b/src/animation/AnimBlendSequence.cpp
@@ -15,6 +15,7 @@ CAnimBlendSequence::CAnimBlendSequence(void)
 
 CAnimBlendSequence::~CAnimBlendSequence(void)
 {
+	assert(keyFramesCompressed == nil);
 	if(keyFrames)
 		RwFree(keyFrames);
 }
@@ -60,3 +61,106 @@ CAnimBlendSequence::RemoveQuaternionFlips(void)
 		last = frame->rotation;
 	}
 }
+
+void
+CAnimBlendSequence::Uncompress(void)
+{
+	int i;
+
+	if(numFrames == 0)
+		return;
+
+	float rotScale = 1.0f/4096.0f;
+	float timeScale = 1.0f/60.0f;
+	float transScale = 1.0f/128.0f;
+	if(type & KF_TRANS){
+		void *newKfs = RwMalloc(numFrames * sizeof(KeyFrameTrans));
+		KeyFrameTransCompressed *ckf = (KeyFrameTransCompressed*)keyFramesCompressed;
+		KeyFrameTrans *kf = (KeyFrameTrans*)newKfs;
+		for(i = 0; i < numFrames; i++){
+			kf->rotation.x = ckf->rot[0]*rotScale;
+			kf->rotation.y = ckf->rot[1]*rotScale;
+			kf->rotation.z = ckf->rot[2]*rotScale;
+			kf->rotation.w = ckf->rot[3]*rotScale;
+			kf->deltaTime = ckf->deltaTime*timeScale;
+			kf->translation.x = ckf->trans[0]*transScale;
+			kf->translation.y = ckf->trans[1]*transScale;
+			kf->translation.z = ckf->trans[2]*transScale;
+			kf++;
+			ckf++;
+		}
+		keyFrames = newKfs;
+	}else{
+		void *newKfs = RwMalloc(numFrames * sizeof(KeyFrame));
+		KeyFrameCompressed *ckf = (KeyFrameCompressed*)keyFramesCompressed;
+		KeyFrame *kf = (KeyFrame*)newKfs;
+		for(i = 0; i < numFrames; i++){
+			kf->rotation.x = ckf->rot[0]*rotScale;
+			kf->rotation.y = ckf->rot[1]*rotScale;
+			kf->rotation.z = ckf->rot[2]*rotScale;
+			kf->rotation.w = ckf->rot[3]*rotScale;
+			kf->deltaTime = ckf->deltaTime*timeScale;
+			kf++;
+			ckf++;
+		}
+		keyFrames = newKfs;
+	}
+	RwFree(keyFramesCompressed);
+	keyFramesCompressed = nil;
+}
+
+void
+CAnimBlendSequence::CompressKeyframes(void)
+{
+	int i;
+
+	if(numFrames == 0)
+		return;
+
+	float rotScale = 4096.0f;
+	float timeScale = 60.0f;
+	float transScale = 128.0f;
+	if(type & KF_TRANS){
+		void *newKfs = RwMalloc(numFrames * sizeof(KeyFrameTransCompressed));
+		KeyFrameTransCompressed *ckf = (KeyFrameTransCompressed*)newKfs;
+		KeyFrameTrans *kf = (KeyFrameTrans*)keyFrames;
+		for(i = 0; i < numFrames; i++){
+			ckf->rot[0] = kf->rotation.x*rotScale;
+			ckf->rot[1] = kf->rotation.y*rotScale;
+			ckf->rot[2] = kf->rotation.z*rotScale;
+			ckf->rot[3] = kf->rotation.w*rotScale;
+			ckf->deltaTime = kf->deltaTime*timeScale + 0.5f;
+			ckf->trans[0] = kf->translation.x*transScale;
+			ckf->trans[1] = kf->translation.y*transScale;
+			ckf->trans[2] = kf->translation.z*transScale;
+			kf++;
+			ckf++;
+		}
+		keyFramesCompressed = newKfs;
+	}else{
+		void *newKfs = RwMalloc(numFrames * sizeof(KeyFrameCompressed));
+		KeyFrameCompressed *ckf = (KeyFrameCompressed*)newKfs;
+		KeyFrame *kf = (KeyFrame*)keyFrames;
+		for(i = 0; i < numFrames; i++){
+			ckf->rot[0] = kf->rotation.x*rotScale;
+			ckf->rot[1] = kf->rotation.y*rotScale;
+			ckf->rot[2] = kf->rotation.z*rotScale;
+			ckf->rot[3] = kf->rotation.w*rotScale;
+			ckf->deltaTime = kf->deltaTime*timeScale + 0.5f;
+			kf++;
+			ckf++;
+		}
+		keyFramesCompressed = newKfs;
+	}
+}
+
+void
+CAnimBlendSequence::RemoveUncompressedData(void)
+{
+	if(numFrames == 0)
+		return;
+	CompressKeyframes();
+	RwFree(keyFrames);
+	keyFrames = nil;
+}
+
-- 
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