62 lines
2.2 KiB
Dart
62 lines
2.2 KiB
Dart
import 'package:vector_math/vector_math_64.dart';
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///
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/// Specifies frame data (i.e. weights) to animate the morph targets contained in [morphTargets] under a mesh named [mesh].
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/// [data] is laid out as numFrames x numMorphTargets.
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/// Each frame is [numMorphTargets] in length, where the index of each weight corresponds to the respective index in [morphTargets].
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/// [morphTargets] must be some subset of the actual morph targets under [mesh] (though the order of these does not need to match).
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///
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class MorphAnimationData {
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final List<String> meshNames;
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final List<String> morphTargets;
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final List<double> data;
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MorphAnimationData(
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this.meshNames, this.data, this.morphTargets, this.frameLengthInMs) {
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assert(data.length == morphTargets.length * numFrames);
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}
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int get numMorphTargets => morphTargets.length;
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int get numFrames => data.length ~/ numMorphTargets;
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final double frameLengthInMs;
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Iterable<double> getData(String morphName) sync* {
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int index = morphTargets.indexOf(morphName);
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if (index == -1) {
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throw Exception("No data for morph $morphName");
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}
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for (int i = 0; i < numFrames; i++) {
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yield data[(i * numMorphTargets) + index];
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}
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}
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}
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///
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/// Model class for bone animation frame data.
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/// To create dynamic/runtime bone animations (as distinct from animations embedded in a glTF asset), create an instance containing the relevant
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/// data and pass to the [setBoneAnimation] method on a [FilamentController].
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/// [frameData] is laid out as [locX, locY, locZ, rotW, rotX, rotY, rotZ]
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///
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class BoneAnimationData {
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final List<String> bones;
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final List<String> meshNames;
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final List<List<Quaternion>> rotationFrameData;
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final List<List<Vector3>> translationFrameData;
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double frameLengthInMs;
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final bool isModelSpace;
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BoneAnimationData(this.bones, this.meshNames, this.rotationFrameData,
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this.translationFrameData, this.frameLengthInMs,
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{this.isModelSpace = false});
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int get numFrames => rotationFrameData.length;
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BoneAnimationData frame(int frame) {
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return BoneAnimationData(bones, meshNames, [rotationFrameData[frame]],
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[translationFrameData[frame]], frameLengthInMs,
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isModelSpace: isModelSpace);
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}
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}
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