Catcrafts/Crafter.Graphics
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animation improvemenets

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This commit is contained in:
Jorijn van der Graaf 2025-11-26 00:24:23 +01:00
commit f842a445d7
2 changed files with 13 additions and 13 deletions
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5
examples/HelloAnimation/main.cpp
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@ -24,8 +24,7 @@ int main() {
element.UpdatePosition(window);
Animation<std::tuple<std::int_fast32_t>> anim({
{std::chrono::seconds(0), FractionalToMapped(-0.5)},
{std::chrono::seconds(5), FractionalToMapped(1.5)}
{std::chrono::seconds(5), FractionalToMapped(-0.5), FractionalToMapped(1.5)},
});
anim.Start(std::chrono::high_resolution_clock::now());
@ -34,7 +33,7 @@ int main() {
std::tuple<std::int_fast32_t> value = anim.Play(time.now);
element.anchorX = std::get<0>(value);
element.UpdatePosition(window);
if(anim.currentFrame == anim.keyframes.size()-1) {
if(anim.currentFrame == anim.keyframes.size()) {
anim.Start(time.now);
}
window.LogTiming();

21
interfaces/Crafter.Graphics-Animation.cppm
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@ -53,7 +53,8 @@ namespace Crafter {
export template <typename T>
struct Keyframe{
std::chrono::duration<double> duration;
T values;
T startValues;
T endValues;
};
export template <typename T>
@ -67,27 +68,27 @@ namespace Crafter {
startedAt = time;
}
T Play(std::chrono::time_point<std::chrono::high_resolution_clock> time) {
std::chrono::duration<double> elapsed = time - startedAt; // elapsed time since animation started
std::chrono::duration<double> elapsed = time - startedAt;
std::chrono::duration<double> accumulated(0);
for (std::uint_fast32_t i = currentFrame; i < keyframes.size() - 1; ++i) {
accumulated += keyframes[i+1].duration;
for (std::uint_fast32_t i = currentFrame; i < keyframes.size(); ++i) {
accumulated += keyframes[i].duration;
if (elapsed < accumulated) {
std::chrono::duration<double> frameStartTime = accumulated - keyframes[i+1].duration;
auto t = (elapsed - frameStartTime) / keyframes[i+1].duration.count();
std::chrono::duration<double> frameStartTime = accumulated - keyframes[i].duration;
auto t = (elapsed - frameStartTime) / keyframes[i].duration.count();
currentFrame = i;
return LerpTuple(
keyframes[i].values,
keyframes[i + 1].values,
keyframes[i].startValues,
keyframes[i].endValues,
t.count()
);
}
}
// If we get here, we're past the last keyframe
currentFrame = keyframes.size() - 1;
return keyframes.back().values;
currentFrame = keyframes.size();
return keyframes.back().endValues;
}
};
}