enforced field semantics and completed shared transitions

io/math.cpp

@@ -6,6 +6,10 @@ int lerp(int a, int b, double t) {
     return qRound(((1.0 - t) * a) + (t * b));
 }
 
+float float_lerp(float a, float b, float t) {
+    return ((1.0F - t) * a) + (t * b);
+}
+
 double double_lerp(double a, double b, double t) {
     return ((1.0 - t) * a) + (t * b);
 }