d6c4f8f608
... and refactor some of the keyframe parsing. TBR= Change-Id: If45922eab36412908036401cee693202f5c3e281 Reviewed-on: https://skia-review.googlesource.com/91100 Reviewed-by: Florin Malita <fmalita@chromium.org> Commit-Queue: Florin Malita <fmalita@chromium.org>
58 lines
1.4 KiB
C++
58 lines
1.4 KiB
C++
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkottyAnimator.h"
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namespace skotty {
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namespace {
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SkScalar lerp_scalar(SkScalar v0, SkScalar v1, float t) {
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SkASSERT(t >= 0 && t <= 1);
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return v0 * (1 - t) + v1 * t;
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}
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} // namespace
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template <>
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void KeyframeInterval<ScalarValue>::lerp(float t, ScalarValue* v) const {
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*v = lerp_scalar(fV0, fV1, t);
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}
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template <>
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void KeyframeInterval<VectorValue>::lerp(float t, VectorValue* v) const {
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SkASSERT(fV0.cardinality() == fV1.cardinality());
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SkASSERT(v->cardinality() == 0);
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v->fVals.reserve(fV0.cardinality());
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for (int i = 0; i < fV0.fVals.count(); ++i) {
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v->fVals.emplace_back(lerp_scalar(fV0.fVals[i], fV1.fVals[i], t));
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}
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}
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template <>
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void KeyframeInterval<ShapeValue>::lerp(float t, ShapeValue* v) const {
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SkASSERT(fV0.cardinality() == fV1.cardinality());
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SkASSERT(v->cardinality() == 0);
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SkAssertResult(fV1.fPath.interpolate(fV0.fPath, t, &v->fPath));
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}
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float AnimatorBase::ComputeLocalT(float t, float t0, float t1,
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const SkPoint& c0, const SkPoint& c1) {
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SkASSERT(t1 > t0);
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auto lt = (t - t0) / (t1 - t0);
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if (c0 != SkPoint({0, 0}) || c1 != SkPoint({1, 1})) {
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// TODO: lt = CubicBezier(lt, c0, c1);
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}
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return SkTPin<float>(lt, 0, 1);
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}
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} // namespace skotty
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