added animation system (with skin support for now)

src/animation/AnimBlendSequence.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include "math/Quaternion.h"
+
+// TODO: put them somewhere else?
+struct KeyFrame {
+	CQuaternion rotation;
+	float deltaTime;	// relative to previous key frame
+};
+
+struct KeyFrameTrans : KeyFrame {
+	CVector translation;
+};
+
+
+// The sequence of key frames of one animated node
+class CAnimBlendSequence
+{
+public:
+	enum {
+		KF_ROT = 1,
+		KF_TRANS = 2
+	};
+	int32 type;
+	char name[24];
+	int32 numFrames;
+#ifdef PED_SKIN
+	int16 boneTag;
+#endif
+	void *keyFrames;
+	void *keyFramesCompressed;
+
+	CAnimBlendSequence(void);
+	virtual ~CAnimBlendSequence(void);
+	void SetName(char *name);
+	void SetNumFrames(int numFrames, bool translation);
+	void RemoveQuaternionFlips(void);
+	KeyFrame *GetKeyFrame(int n) {
+		return type & KF_TRANS ?
+			&((KeyFrameTrans*)keyFrames)[n] :
+			&((KeyFrame*)keyFrames)[n];
+	}
+	bool HasTranslation(void) { return !!(type & KF_TRANS); }
+	// TODO? these are unused
+//	void Uncompress(void);
+//	void CompressKeyframes(void);
+//	void RemoveUncompressedData(void);
+
+#ifdef PED_SKIN
+	void SetBoneTag(int tag) { boneTag = tag; }
+#endif
+};
+#ifndef PED_SKIN
+static_assert(sizeof(CAnimBlendSequence) == 0x2C, "CAnimBlendSequence: error");
+#endif