GEEKING

Rendering/g3d/g3dcpp/PhysicsFrame.cpp

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+/**
+ @file PhysicsFrame.cpp
+
+ @maintainer Morgan McGuire, http://graphics.cs.williams.edu
+ 
+ @created 2002-07-09
+ @edited  2010-03-25
+*/
+
+#include "G3D/platform.h"
+#include "G3D/stringutils.h"
+#include "G3D/PhysicsFrame.h"
+
+namespace G3D {
+
+PhysicsFrame::PhysicsFrame() {
+    translation = Vector3::zero();
+    rotation    = Quat();
+}
+
+
+PhysicsFrame::PhysicsFrame(
+    const CoordinateFrame& coordinateFrame) {
+
+    translation = coordinateFrame.translation;
+    rotation    = Quat(coordinateFrame.rotation);
+}
+
+
+PhysicsFrame PhysicsFrame::operator*(const PhysicsFrame& other) const {
+    PhysicsFrame result;
+
+    result.rotation = rotation * other.rotation;
+    result.translation = translation + rotation.toRotationMatrix() * other.translation;
+
+    return result;
+}
+
+
+PhysicsFrame::operator CoordinateFrame() const {
+    CoordinateFrame f;
+    
+    f.translation = translation;
+    f.rotation    = rotation.toRotationMatrix();
+
+    return f;
+}
+
+
+PhysicsFrame PhysicsFrame::lerp(
+    const PhysicsFrame&     other,
+    float                   alpha) const {
+
+    PhysicsFrame result;
+
+    result.translation = translation.lerp(other.translation, alpha);
+    result.rotation    = rotation.slerp(other.rotation, alpha);
+
+    return result;
+}
+
+
+}; // namespace
+