motion; reset interval

pgfw/Animation.py

@@ -130,6 +130,9 @@ class Account:
             index = 0
         self.interval_index = index
 
+    def reset_interval(self):
+        self.interval_index = 0
+
     def reset_timer(self):
         if self.animation.unfiltered:
             ticks = self.time_filter.get_unfiltered_ticks()

pgfw/Sprite.py

@@ -360,6 +360,7 @@ class Frameset:
 
     def reset(self):
         self.current_index = 0
+        self.sprite.accounts[self.sprite.shift_frame].reset_interval()
 
     def get_current_id(self):
         return self.order[self.current_index]

pgfw/motion.py

@@ -0,0 +1,7 @@
+from math import sin, cos, atan2
+
+def get_step(start, end, speed):
+    x0, y0 = start
+    x1, y1 = end
+    angle = atan2(x1 - x0, y1 - y0)
+    return speed * sin(angle), speed * cos(angle)