Don't try to strafe at angles of NaN

src/main/java/com/minelittlepony/model/anim/BasicEasingInterpolator.java

@@ -21,6 +21,11 @@ public class BasicEasingInterpolator implements IInterpolator {
 
         from += (to - from) / scalingFactor;
 
+        if (Float.isNaN(from) || Float.isInfinite(from)) {
+            System.err.println("Error: Animation frame for " + key + " is NaN or Infinite.");
+            from = to;
+        }
+
         properties.put(key, from);
 
         return from;

src/main/java/com/minelittlepony/pony/data/PonyData.java

@@ -47,7 +47,7 @@ public class PonyData implements IPonyData {
 
     @Override
     public PonyRace getRace() {
-        return race.isHuman() ? race : PonyRace.PEGASUS;
+        return race;
     }
 
     @Override
@@ -77,7 +77,7 @@ public class PonyData implements IPonyData {
 
     @Override
     public boolean isWearing(PonyWearable wearable) {
-        return true;//wearables[wearable.ordinal()];
+        return wearables[wearable.ordinal()];
     }
 
     @Override

src/main/java/com/minelittlepony/render/player/RenderPonyPlayer.java

@@ -43,7 +43,13 @@ public class RenderPonyPlayer extends RenderPonyBase {
         }
 
         // ayyy magic numbers (after 5 - an approximation of nice looking coefficients calculated by hand)
-        roll *= horMotion * 5 * (3.6884f * Math.pow(Math.abs(roll), -0.191));
+
+        // roll might be zero, in which case Math.pow produces +Infinity. Anything x Infinity = NaN.
+        double pow = roll != 0 ? Math.pow(Math.abs(roll), -0.191) : 0;
+
+        roll *= horMotion * 5 * (3.6884f * pow);
+
+        assert !Float.isNaN((float)roll);
 
         return MathHelper.clamp(roll, -54, 54);
     }
@@ -67,7 +73,9 @@ public class RenderPonyPlayer extends RenderPonyBase {
 
         GlStateManager.rotate(ponyModel.motionPitch, 1, 0, 0);
 
-        float roll = getPony().getMetadata().getInterpolator().interpolate("pegasusRoll", (float)calculateRoll(player, motionX,  motionY, motionZ), 10);
+        float roll = (float)calculateRoll(player, motionX,  motionY, motionZ);
+
+        roll = getPony().getMetadata().getInterpolator().interpolate("pegasusRoll", roll, 10);
 
         GlStateManager.rotate((float)roll, 0, 0, 1);