79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
#include <mbgl/util/transition.hpp>
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#include <mbgl/util/unitbezier.hpp>
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#include <mbgl/platform/platform.hpp>
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namespace mbgl { namespace util {
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UnitBezier ease(0, 0, 0.25, 1);
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transition::~transition() {}
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double transition::interpolateDouble(double from, double to, double t) const {
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return from + (to - from) * t;
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}
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float transition::interpolateFloat(float from, float to, double t) const {
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return from + (to - from) * (float)t;
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}
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mbgl::Color transition::interpolateColor(mbgl::Color from, mbgl::Color to, double t) const {
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return {{ interpolateFloat(from[0], to[0], t),
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interpolateFloat(from[1], to[1], t),
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interpolateFloat(from[2], to[2], t),
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interpolateFloat(from[3], to[3], t) }};
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}
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std::array<float, 2> transition::interpolateFloatArray(std::array<float, 2> from, std::array<float, 2> to, double t) const {
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return {{ interpolateFloat(from[0], to[0], t), interpolateFloat(from[1], to[1], t) }};
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}
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template <>
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transition::state ease_transition<double>::update(timestamp now) const {
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float t = progress(now);
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if (t >= 1) {
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value = to;
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return complete;
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} else {
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value = interpolateDouble(from, to, ease.solve(t, 0.001));
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return running;
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}
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}
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template <>
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transition::state ease_transition<mbgl::Color>::update(timestamp now) const {
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float t = progress(now);
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if (t >= 1) {
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value = to;
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return complete;
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} else {
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value = interpolateColor(from, to, ease.solve(t, 0.001));
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return running;
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}
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}
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template <>
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transition::state ease_transition<float>::update(timestamp now) const {
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float t = progress(now);
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if (t >= 1) {
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value = to;
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return complete;
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} else {
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value = interpolateFloat(from, to, ease.solve(t, 0.001));
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return running;
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}
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}
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template <>
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transition::state ease_transition<std::array<float, 2>>::update(timestamp now) const {
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float t = progress(now);
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if (t >= 1) {
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value = to;
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return complete;
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} else {
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value = interpolateFloatArray(from, to, ease.solve(t, 0.001));
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return running;
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}
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}
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}}
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