1 files changed, 80 insertions, 0 deletions
diff --git a/dep/g3dlite/source/PhysicsFrameSpline.cpp b/dep/g3dlite/source/PhysicsFrameSpline.cpp
new file mode 100644
index 00000000000..2dfdb6f9139
--- /dev/null
+++ b/dep/g3dlite/source/PhysicsFrameSpline.cpp
@@ -0,0 +1,80 @@
+/**
+  \file PhysicsFrameSpline.cpp
+
+  \author Morgan McGuire, http://graphics.cs.williams.edu
+ */
+#include "G3D/PhysicsFrameSpline.h"
+#include "G3D/Any.h"
+#include "G3D/stringutils.h"
+
+namespace G3D {
+
+PhysicsFrameSpline::PhysicsFrameSpline() {}
+
+PhysicsFrameSpline::PhysicsFrameSpline(const Any& any) {
+    *this = any;
+}
+
+PhysicsFrameSpline& PhysicsFrameSpline::operator=(const Any& any) {
+    const std::string& n = toLower(any.name());
+    *this = PhysicsFrameSpline();
+
+    if (n == "physicsframespline" || n == "pframespline") {
+        any.verifyName("PhysicsFrameSpline", "PFrameSpline");
+        
+        for (Any::AnyTable::Iterator it = any.table().begin(); it.hasMore(); ++it) {
+            const std::string& k = toLower(it->key);
+            if (k == "cyclic") {
+                cyclic = it->value;
+            } else if (k == "control") {
+                const Any& v = it->value;
+                v.verifyType(Any::ARRAY);
+                control.resize(v.size());
+                for (int i = 0; i < control.size(); ++i) {
+                    control[i] = v[i];
+                }
+                if (! any.containsKey("time")) {
+                    time.resize(control.size());
+                    for (int i = 0; i < time.size(); ++i) {
+                        time[i] = i;
+                    }
+                }
+            } else if (k == "finalinterval") {
+                finalInterval = it->value;
+            } else if (k == "time") {
+                const Any& v = it->value;
+                v.verifyType(Any::ARRAY);
+                time.resize(v.size());
+                for (int i = 0; i < time.size(); ++i) {
+                    time[i] = v[i];
+                }
+            }
+        }
+    } else {
+        // Must be a PhysicsFrame constructor of some kind
+        append(any);
+    }
+    return *this;
+}
+
+
+void PhysicsFrameSpline::correct(PhysicsFrame& frame) const {
+    frame.rotation.unitize();
+}
+
+
+void PhysicsFrameSpline::ensureShortestPath(PhysicsFrame* A, int N) const {
+    for (int i = 1; i < N; ++i) {
+        const Quat& p = A[i - 1].rotation;
+        Quat& q = A[i].rotation;
+
+        float cosphi = p.dot(q);
+
+        if (cosphi < 0) {
+            // Going the long way, so change the order
+            q = -q;
+        }
+    }
+}
+
+}