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|
use scene::{ChannelData, ElementAnimations, ParamValue};
use time::MediaTime;
use crate::color::{LinearRgba, format_linear_rgba, parse_color_to_linear_rgba};
use crate::interpolation::channel_value_at_time;
pub fn get_element_local_time(
timeline_time: MediaTime,
element_start_time: MediaTime,
element_duration: MediaTime,
) -> MediaTime {
let local_time = timeline_time - element_start_time;
if local_time <= MediaTime::ZERO {
return MediaTime::ZERO;
}
if local_time >= element_duration {
return element_duration;
}
local_time
}
pub fn resolve_animation_path_value_at_time(
animations: Option<&ElementAnimations>,
property_path: &str,
local_time: MediaTime,
fallback_value: &ParamValue,
) -> ParamValue {
let Some(data) = animations.and_then(|a| a.get(property_path)) else {
return fallback_value.clone();
};
match data {
ChannelData::Single(channel) => match channel_value_at_time(
Some(channel),
local_time,
fallback_value,
) {
value => value,
},
ChannelData::Composite(components) => {
let ParamValue::String(fallback_color) = fallback_value else {
return fallback_value.clone();
};
let (Some(r), Some(g), Some(b), Some(a)) = (
components.get("r"),
components.get("g"),
components.get("b"),
components.get("a"),
) else {
return fallback_value.clone();
};
let Some(fallback_components) = parse_color_to_linear_rgba(fallback_color) else {
return fallback_value.clone();
};
let component_at = |channel: &scene::AnimationChannel, fallback: f64| {
match channel_value_at_time(
Some(channel),
local_time,
&ParamValue::Number(fallback),
) {
ParamValue::Number(value) => value,
_ => fallback,
}
};
ParamValue::String(format_linear_rgba(&LinearRgba {
r: component_at(r, fallback_components.r),
g: component_at(g, fallback_components.g),
b: component_at(b, fallback_components.b),
a: component_at(a, fallback_components.a),
}))
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use scene::{AnimationChannel, ScalarAnimationKey, ScalarChannel, ScalarSegmentType, TangentMode};
use std::collections::BTreeMap;
fn at(time: i64) -> MediaTime {
MediaTime::from_ticks(time)
}
#[test]
fn local_time_clamps_to_element_range() {
assert_eq!(get_element_local_time(at(50), at(100), at(200)), at(0));
assert_eq!(get_element_local_time(at(150), at(100), at(200)), at(50));
assert_eq!(get_element_local_time(at(400), at(100), at(200)), at(200));
}
#[test]
fn resolves_scalar_path_value() {
let channel = AnimationChannel::Scalar(ScalarChannel {
keys: vec![
ScalarAnimationKey {
id: "a".to_string(),
time: at(0),
value: 0.0,
left_handle: None,
right_handle: None,
segment_to_next: ScalarSegmentType::Linear,
tangent_mode: TangentMode::Flat,
},
ScalarAnimationKey {
id: "b".to_string(),
time: at(100),
value: 1.0,
left_handle: None,
right_handle: None,
segment_to_next: ScalarSegmentType::Linear,
tangent_mode: TangentMode::Flat,
},
],
extrapolation: None,
});
let mut animations = BTreeMap::new();
animations.insert("opacity".to_string(), ChannelData::Single(channel));
assert_eq!(
resolve_animation_path_value_at_time(
Some(&animations),
"opacity",
at(50),
&ParamValue::Number(1.0),
),
ParamValue::Number(0.5)
);
assert_eq!(
resolve_animation_path_value_at_time(
Some(&animations),
"volume",
at(50),
&ParamValue::Number(1.0),
),
ParamValue::Number(1.0)
);
}
#[test]
fn resolves_composite_color_path_value() {
let component = |value: f64| {
AnimationChannel::Scalar(ScalarChannel {
keys: vec![ScalarAnimationKey {
id: "k".to_string(),
time: at(0),
value,
left_handle: None,
right_handle: None,
segment_to_next: ScalarSegmentType::Linear,
tangent_mode: TangentMode::Flat,
}],
extrapolation: None,
})
};
let mut components = BTreeMap::new();
components.insert("r".to_string(), component(1.0));
components.insert("g".to_string(), component(0.0));
components.insert("b".to_string(), component(0.0));
components.insert("a".to_string(), component(1.0));
let mut animations = BTreeMap::new();
animations.insert("color".to_string(), ChannelData::Composite(components));
assert_eq!(
resolve_animation_path_value_at_time(
Some(&animations),
"color",
at(0),
&ParamValue::String("#ffffff".to_string()),
),
ParamValue::String("#ff0000".to_string())
);
assert_eq!(
resolve_animation_path_value_at_time(
Some(&animations),
"color",
at(0),
&ParamValue::Number(0.0),
),
ParamValue::Number(0.0)
);
}
}
|
