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