Initial commit

engines/stark/model/skeleton_anim.cpp

@@ -0,0 +1,107 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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/>.
+ *
+ */
+
+#include "engines/stark/model/skeleton_anim.h"
+
+#include "engines/stark/services/archiveloader.h"
+
+namespace Stark {
+
+SkeletonAnim::SkeletonAnim() :
+		_id(0),
+		_ver(0),
+		_u1(0),
+		_u2(0),
+		_time(0) {
+}
+
+void SkeletonAnim::createFromStream(ArchiveReadStream *stream) {
+	_id = stream->readUint32LE();
+	_ver = stream->readUint32LE();
+	if (_ver == 3) {
+		_u1 = 0;
+		_time = stream->readUint32LE();
+		_u2 = stream->readUint32LE();
+	} else {
+		_u1 = stream->readUint32LE();
+		_u2 = stream->readUint32LE();
+		_time = stream->readUint32LE();
+	}
+	if (_u2 != 0xdeadbabe) {
+		error("Wrong magic while reading animation");
+	}
+
+	uint32 num = stream->readUint32LE();
+	_boneAnims.resize(num);
+	for (uint32 i = 0; i < num; ++i) {
+		uint32 bone = stream->readUint32LE();
+		uint32 numKeys = stream->readUint32LE();
+
+		BoneAnim &boneAnim = _boneAnims[bone];
+		boneAnim._keys.resize(numKeys);
+		for (uint32 j = 0; j < numKeys; ++j) {
+			AnimKey &key = boneAnim._keys[j];
+			key._time = stream->readUint32LE();
+			key._rot = stream->readQuaternion();
+			key._pos = stream->readVector3();
+		}
+	}
+}
+
+void SkeletonAnim::getCoordForBone(uint32 time, int boneIdx, Math::Vector3d &pos, Math::Quaternion &rot) const {
+	const Common::Array<AnimKey> &keys = _boneAnims[boneIdx]._keys;
+
+	if (keys.size() == 1) {
+		// There is only one key for this bone, don't bother searching which one to use
+		pos = keys[0]._pos;
+		rot = keys[0]._rot;
+
+		return;
+	}
+
+	for (Common::Array<AnimKey>::const_iterator it = keys.begin(); it < keys.end(); ++it) {
+		if (it->_time > time) {
+			// Between two key frames, interpolate
+			const AnimKey *a = it;
+			--it;
+			const AnimKey *b = it;
+
+			float t = (float)(time - b->_time) / (float)(a->_time - b->_time);
+
+			pos = b->_pos + (a->_pos - b->_pos) * t;
+			rot = b->_rot.slerpQuat(a->_rot, t);
+
+			return;
+		} else if (it->_time == time || it == keys.end() - 1){
+			// At a key frame
+			// If not right one but didn't find any, then use last one as default
+			const AnimKey *key = it;
+			pos = key->_pos;
+			rot = key->_rot;
+			if (it == keys.end() - 1) {
+				warning("Unable to find keyframe for bone '%d' at %d ms, using default", boneIdx, time);
+			}
+			return;
+		}
+	}
+}
+
+} // End of namespace Stark