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finalize bone transform animation

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This commit is contained in:
Nick Fisher
2022-12-17 16:31:20 +08:00
parent de9797a20e
commit b1832c237f
17 changed files with 581 additions and 476 deletions
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106
lib/animations/animation_builder.dart
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@@ -1,44 +1,7 @@
import 'animations.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/services.dart';
class Animation {
late final Float32List? morphData;
final int numMorphWeights;
final int numFrames;
final double frameLengthInMs;
final List<String>? boneNames;
final List<String>? meshNames;
final Float32List? boneTransforms;
Animation(this.morphData, this.numMorphWeights, this.boneTransforms,
this.boneNames, this.meshNames, this.numFrames, this.frameLengthInMs) {
if (morphData != null && morphData!.length != numFrames * numMorphWeights) {
throw Exception("Mismatched animation data with frame length");
}
}
Animation.from(
{required List<List<double>> morphData,
required this.numMorphWeights,
this.boneTransforms,
this.boneNames,
this.meshNames,
required this.numFrames,
required this.frameLengthInMs}) {
if (morphData.length != numFrames) {
throw Exception("Mismatched animation data with frame length");
}
this.morphData = Float32List(numMorphWeights * numFrames);
for (int i = 0; i < numFrames; i++) {
this.morphData!.setRange((i * numMorphWeights),
(i * numMorphWeights) + numMorphWeights, morphData[i]);
}
}
}
import 'package:vector_math/vector_math.dart';
class AnimationBuilder {
BoneAnimation? boneAnimation;
@@ -53,7 +16,7 @@ class AnimationBuilder {
final List<String> _boneNames = [];
final List<String> _meshNames = [];
final List<BoneTransform> _boneTransforms = [];
final List<BoneTransformFrameData> _boneTransforms = [];
Animation build() {
if (_numMorphWeights == 0 || _duration == 0 || _frameLengthInMs == 0)
@@ -79,22 +42,31 @@ class AnimationBuilder {
print(
"Created morphWeights of size ${morphData.length} (${morphData.lengthInBytes} for ${numFrames} frames");
final boneTransforms = Float32List(numFrames * _boneTransforms.length * 7);
print(
"Creating bone transforms of size ${numFrames * _boneTransforms.length * 7}");
for (int i = 0; i < numFrames; i++) {
for (int j = 0; j < _boneTransforms.length; j++) {
var frameData = _boneTransforms[j].getFrameData(i).toList();
var rngStart = ((i * _boneTransforms.length) + j) * 7;
var rngEnd = rngStart + 7;
boneTransforms.setRange(rngStart, rngEnd, frameData);
}
print(
"frameData for frame $i ${boneTransforms.sublist(i * _boneTransforms.length * 7, (i * _boneTransforms.length * 7) + 7)}");
List<BoneAnimation>? boneAnimations;
if (_boneTransforms.isNotEmpty) {
throw Exception("TODO");
boneAnimations = <BoneAnimation>[];
final boneTransforms =
Float32List(numFrames * _boneTransforms.length * 7);
// print(
// "Creating bone transforms of size ${numFrames * _boneTransforms.length * 7}");
// for (int i = 0; i < numFrames; i++) {
// for (int j = 0; j < _boneTransforms.length; j++) {
// var frameData = _boneTransforms[j].getFrameData(i).toList();
// var rngStart = ((i * _boneTransforms.length) + j) * 7;
// var rngEnd = rngStart + 7;
// boneTransforms.setRange(rngStart, rngEnd, frameData);
// }
// print(
// "frameData for frame $i ${boneTransforms.sublist(i * _boneTransforms.length * 7, (i * _boneTransforms.length * 7) + 7)}");
// }
}
return Animation(morphData, _numMorphWeights, boneTransforms, _boneNames,
_meshNames, numFrames, _frameLengthInMs);
return Animation(morphData, _numMorphWeights, boneAnimations, numFrames,
_frameLengthInMs);
}
AnimationBuilder setFramerate(int framerate) {
@@ -126,11 +98,11 @@ class AnimationBuilder {
String meshName,
double start,
double end,
Vec3 transStart,
Vec3 transEnd,
Vector3 transStart,
Vector3 transEnd,
Quaternion quatStart,
Quaternion quatEnd) {
var translations = <Vec3>[];
var translations = <Vector3>[];
var quats = <Quaternion>[];
var frameStart = (start * 1000) ~/ _frameLengthInMs;
var frameEnd = (end * 1000) ~/ _frameLengthInMs;
@@ -143,25 +115,25 @@ class AnimationBuilder {
if (i >= frameStart && i < frameEnd) {
var linear = (i - frameStart) / (frameEnd - frameStart);
translations.add(Vec3(
x: ((1 - linear) * transStart.x) + (linear * transEnd.x),
y: ((1 - linear) * transStart.y) + (linear * transEnd.y),
z: ((1 - linear) * transStart.z) + (linear * transEnd.z),
translations.add(Vector3(
((1 - linear) * transStart.x) + (linear * transEnd.x),
((1 - linear) * transStart.y) + (linear * transEnd.y),
((1 - linear) * transStart.z) + (linear * transEnd.z),
));
quats.add(Quaternion(
x: ((1 - linear) * quatStart.x) + (linear * quatEnd.x),
y: ((1 - linear) * quatStart.y) + (linear * quatEnd.y),
z: ((1 - linear) * quatStart.z) + (linear * quatEnd.z),
w: ((1 - linear) * quatStart.w) + (linear * quatEnd.w),
((1 - linear) * quatStart.x) + (linear * quatEnd.x),
((1 - linear) * quatStart.y) + (linear * quatEnd.y),
((1 - linear) * quatStart.z) + (linear * quatEnd.z),
((1 - linear) * quatStart.w) + (linear * quatEnd.w),
));
} else {
translations.add(Vec3());
quats.add(Quaternion());
translations.add(Vector3.zero());
quats.add(Quaternion.identity());
}
}
_boneTransforms.add(BoneTransform(translations, quats));
_boneTransforms.add(BoneTransformFrameData(translations, quats));
_boneNames.add(boneName);
_meshNames.add(meshName);