GRAPHICS: Add basic animation controllers

src/graphics/Makefile.am

@@ -24,6 +24,7 @@ noinst_HEADERS = \
                  ttf.h \
                  font.h \
                  guiman.h \
+                 controllers.h \
                  $(EMPTY)
 
 libgraphics_la_SOURCES = \
@@ -40,6 +41,7 @@ libgraphics_la_SOURCES = \
                          ttf.cpp \
                          font.cpp \
                          guiman.cpp \
+                         controllers.cpp \
                          $(EMPTY)
 
 if DARWIN

src/graphics/controllers.cpp

@@ -0,0 +1,133 @@
+/* xoreos - A reimplementation of BioWare's Aurora engine
+ *
+ * xoreos is the legal property of its developers, whose names can be
+ * found in the AUTHORS 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ *
+ * The Infinity, Aurora, Odyssey, Eclipse and Lycium engines, Copyright (c) BioWare corp.
+ * The Electron engine, Copyright (c) Obsidian Entertainment and BioWare corp.
+ */
+
+/** @file graphics/controllers.cpp
+ *  Basic animation controllers.
+ */
+
+#include "graphics/controllers.h"
+#include "graphics/materialman.h"
+
+namespace Graphics {
+
+AnimationControllerFunction::AnimationControllerFunction(Ogre::Real sequenceTime, Ogre::Real offset,
+		AnimationFunction function, bool loop) : Ogre::ControllerFunction<Ogre::Real>(false),
+	_sequenceTime(sequenceTime), _currentTime(offset), _function(function), _loop(loop), _ended(false) {
+
+}
+
+AnimationControllerFunction::~AnimationControllerFunction() {
+}
+
+Ogre::Real AnimationControllerFunction::calculate(Ogre::Real source) {
+	if (_ended)
+		return doFunction();
+
+	//Assume source is time since last update
+	_currentTime += source;
+
+	if (_sequenceTime == 0.0) {
+
+		_ended       = true;
+		_currentTime = 1.0;
+
+	} else if (_currentTime >= _sequenceTime) {
+
+		if (!_loop) {
+			_ended       = true;
+			_currentTime = 1.0;
+		} else
+			while (_currentTime >= _sequenceTime)
+				_currentTime -= _sequenceTime;
+
+
+	} else if (_currentTime < 0.0) {
+
+		if (!_loop) {
+			_ended       = true;
+			_currentTime = 0.0;
+		} else
+			while (_currentTime < 0.0)
+				_currentTime += _sequenceTime;
+
+	}
+
+	return doFunction();
+}
+
+Ogre::Real AnimationControllerFunction::doFunction() {
+	Ogre::Real fraction = (_sequenceTime == 0.0) ? 1.0 : (_currentTime / _sequenceTime);
+
+	switch (_function) {
+		case kAnimationFunctionIncrease:
+			return fraction;
+
+		case kAnimationFunctionDecrease:
+			return 1.0 - fraction;
+
+		case kAnimationFunctionIncreaseDecrease:
+			return (fraction <= 0.5) ? (fraction * 2) : ((1.0 - fraction) * 2);
+
+		case kAnimationFunctionDecreaseIncrease:
+			return 1.0 - ((fraction <= 0.5) ? (fraction * 2) : ((1.0 - fraction) * 2));
+
+		default:
+			break;
+	}
+
+	return 0.0;
+}
+
+void AnimationControllerFunction::setTime(Ogre::Real timeVal) {
+	_currentTime = timeVal;
+}
+
+void AnimationControllerFunction::setSequenceTime(Ogre::Real seqVal) {
+	_sequenceTime = seqVal;
+}
+
+
+MaterialAlphaControllerValue::MaterialAlphaControllerValue(Ogre::MaterialPtr material) {
+	_materials.push_back(material);
+}
+
+MaterialAlphaControllerValue::MaterialAlphaControllerValue(std::list<Ogre::MaterialPtr> materials) : _materials(materials) {
+}
+
+MaterialAlphaControllerValue::~MaterialAlphaControllerValue() {
+}
+
+Ogre::Real MaterialAlphaControllerValue::getValue(void) const {
+	// Not implemented; we don't need to use this value as a source
+
+	return 0.0;
+}
+
+void MaterialAlphaControllerValue::setValue(Ogre::Real value) {
+	for (std::list<Ogre::MaterialPtr>::iterator m = _materials.begin(); m != _materials.end(); ++m)
+		MaterialMan.setAlphaModifier(*m, value);
+}
+
+} // End of namespace Graphics

src/graphics/controllers.h

@@ -0,0 +1,90 @@
+/* xoreos - A reimplementation of BioWare's Aurora engine
+ *
+ * xoreos is the legal property of its developers, whose names can be
+ * found in the AUTHORS 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ *
+ * The Infinity, Aurora, Odyssey, Eclipse and Lycium engines, Copyright (c) BioWare corp.
+ * The Electron engine, Copyright (c) Obsidian Entertainment and BioWare corp.
+ */
+
+/** @file graphics/controllers.h
+ *  Basic animation controllers.
+ */
+
+#ifndef GRAPHICS_CONTROLLERS_H
+#define GRAPHICS_CONTROLLERS_H
+
+#include <OgrePrerequisites.h>
+#include <OgreController.h>
+
+#include <list>
+
+namespace Graphics {
+
+/** The specific animation function. */
+enum AnimationFunction {
+	kAnimationFunctionIncrease,         ///< Steadily increasing.
+	kAnimationFunctionDecrease,         ///< Steadily decreasing.
+	kAnimationFunctionIncreaseDecrease, ///< Increasing, then decreasing again.
+	kAnimationFunctionDecreaseIncrease  ///< Decreasing, then increasing again.
+};
+
+/** An animation controller function just like Ogre::AnimationControllerFunction, except
+ *  that this one can do more than just steadily increase and can do non-looping as well.
+ */
+class AnimationControllerFunction : public Ogre::ControllerFunction<Ogre::Real> {
+public:
+	AnimationControllerFunction(Ogre::Real sequenceTime, Ogre::Real offset, AnimationFunction function, bool loop);
+	~AnimationControllerFunction();
+
+	Ogre::Real calculate(Ogre::Real source);
+
+	void setTime(Ogre::Real timeVal);
+	void setSequenceTime(Ogre::Real seqVal);
+
+private:
+	Ogre::Real _sequenceTime;
+	Ogre::Real _currentTime;
+
+	AnimationFunction _function;
+
+	bool _loop;
+	bool _ended;
+
+
+	Ogre::Real doFunction();
+};
+
+class MaterialAlphaControllerValue : public Ogre::ControllerValue<Ogre::Real> {
+public:
+	MaterialAlphaControllerValue(Ogre::MaterialPtr material);
+	MaterialAlphaControllerValue(std::list<Ogre::MaterialPtr> materials);
+	~MaterialAlphaControllerValue();
+
+	Ogre::Real getValue(void) const;
+
+	void setValue(Ogre::Real value);
+
+private:
+	std::list<Ogre::MaterialPtr> _materials;
+};
+
+} // End of namespace Graphics
+
+#endif // GRAPHICS_CONTROLLERS_H