Import of the watch repository from Pebble

tools/animation_timing_tables.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python
+# Copyright 2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+# These constants are borrowed from animation_timing.h:
+ANIMATION_NORMALIZED_MAX = 65535
+ANIMATION_NORMALIZED_MIN = 0
+
+# "Standard" animation curves, borrowed from the interwebs:
+d = ANIMATION_NORMALIZED_MAX
+b = ANIMATION_NORMALIZED_MIN
+c = ANIMATION_NORMALIZED_MAX
+
+def easeInOut(t):
+    t = t / (d / 2)
+    if (t < 1.0):
+        return c/2*t*t + b
+    t -= 1
+    return -c/2 * (t*(t-2) - 1) + b
+
+def easeOut(t):
+    t /= d
+    return -c * t * (t - 2) + b
+
+def easeIn(t):
+    t /= d
+    return c*t*t + b
+
+def print_table(name, func):
+    nums_per_row = 4
+    table = [func(float(t)) for t in xrange(0, 65537, 2048)]
+    print "static const uint16_t %s_table[33] = {" % name
+    for i in xrange(0, len(table), nums_per_row):
+        print '    ' + ', '.join(str(int(n)) for n in table[i:i+nums_per_row]) + ','
+    print '};\n'
+
+print_table('ease_in', easeIn)
+print_table('ease_out', easeOut)
+print_table('ease_in_out', easeInOut)