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engines/hpl1/engine/graphics/Bone.cpp

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+/* 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/>.
+ *
+ */
+
+/*
+ * Copyright (C) 2006-2010 - Frictional Games
+ *
+ * This file is part of HPL1 Engine.
+ */
+
+#include "hpl1/engine/graphics/Bone.h"
+
+#include "hpl1/engine/graphics/Skeleton.h"
+#include "hpl1/engine/math/Math.h"
+
+#include "hpl1/engine/system/low_level_system.h"
+
+namespace hpl {
+
+//////////////////////////////////////////////////////////////////////////
+// CONSTRUCTORS
+//////////////////////////////////////////////////////////////////////////
+
+//-----------------------------------------------------------------------
+
+cBone::cBone(const tString &asName, cSkeleton *apSkeleton) {
+	msName = asName;
+	mpSkeleton = apSkeleton;
+	mpParent = NULL;
+
+	mbNeedsUpdate = true;
+
+	mlValue = 0;
+}
+
+//-----------------------------------------------------------------------
+
+cBone::~cBone() {
+	STLDeleteAll(mlstChildren);
+}
+
+//-----------------------------------------------------------------------
+
+//////////////////////////////////////////////////////////////////////////
+// PUBLIC METHODS
+//////////////////////////////////////////////////////////////////////////
+
+//-----------------------------------------------------------------------
+
+cBone *cBone::CreateChildBone(const tString &asName) {
+	cBone *pBone = hplNew(cBone, (asName, mpSkeleton));
+	pBone->mpParent = this;
+
+	mlstChildren.push_back(pBone);
+	mpSkeleton->AddBone(pBone);
+
+	return pBone;
+}
+
+//-----------------------------------------------------------------------
+
+void cBone::SetTransform(const cMatrixf &a_mtxTransform) {
+	m_mtxTransform = a_mtxTransform;
+
+	NeedsUpdate();
+}
+
+//-----------------------------------------------------------------------
+
+const cMatrixf &cBone::GetLocalTransform() {
+	return m_mtxTransform;
+}
+
+const cMatrixf &cBone::GetWorldTransform() {
+	UpdateMatrix();
+
+	return m_mtxWorldTransform;
+}
+
+const cMatrixf &cBone::GetInvWorldTransform() {
+	UpdateMatrix();
+
+	return m_mtxInvWorldTransform;
+}
+
+//-----------------------------------------------------------------------
+
+void cBone::Detach() {
+	if (mpParent == NULL)
+		return;
+
+	tBoneListIt it = mpParent->mlstChildren.begin();
+	for (; it != mpParent->mlstChildren.end(); it++) {
+		if (*it == this) {
+			mpParent->mlstChildren.erase(it);
+			break;
+		}
+	}
+
+	mpSkeleton->RemoveBone(this);
+}
+
+//-----------------------------------------------------------------------
+
+cBoneIterator cBone::GetChildIterator() {
+	return cBoneIterator(&mlstChildren);
+}
+
+//-----------------------------------------------------------------------
+
+void cBone::UpdateMatrix() {
+	if (mbNeedsUpdate == false)
+		return;
+
+	if (mpParent == NULL) {
+		m_mtxWorldTransform = m_mtxTransform;
+	} else {
+		m_mtxWorldTransform = cMath::MatrixMul(mpParent->GetWorldTransform(), m_mtxTransform);
+	}
+
+	m_mtxInvWorldTransform = cMath::MatrixInverse(m_mtxWorldTransform);
+
+	mbNeedsUpdate = false;
+}
+
+//-----------------------------------------------------------------------
+
+//////////////////////////////////////////////////////////////////////////
+// PRIVATE METHODS
+//////////////////////////////////////////////////////////////////////////
+
+//-----------------------------------------------------------------------
+
+void cBone::NeedsUpdate() {
+	mbNeedsUpdate = true;
+
+	tBoneListIt it = mlstChildren.begin();
+	for (; it != mlstChildren.end(); it++) {
+		cBone *pBone = *it;
+
+		pBone->NeedsUpdate();
+	}
+}
+//-----------------------------------------------------------------------
+} // namespace hpl