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fix(SkeletonAnimation): skeleton animation parser (#353)
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fix gltf skeleton animation parser
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@Codeboy-cn
Codeboy-cn committed Jan 18, 2024
1 parent b3d25b5 commit 10ee99e
Showing 1 changed file with 127 additions and 25 deletions.
152 changes: 127 additions & 25 deletions src/loader/parser/gltf/GLTFSubParserSkeleton.ts
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
import { Vector3 } from "../../..";
import { Joint } from "../../../components/anim/skeletonAnim/Joint";
import { Skeleton } from "../../../components/anim/skeletonAnim/Skeleton";
import { SkeletonAnimationClip } from "../../../components/anim/skeletonAnim/SkeletonAnimationClip";
Expand All @@ -21,7 +22,10 @@ export class GLTFSubParserSkeleton {

public parseSkeletonAnimation(skeleton: Skeleton, animation) {
let count = 0;
let numFrame: number = this.subParser.parseAccessor(animation.samplers[0].input).data.length;
let inputAccessor = this.subParser.parseAccessor(animation.samplers[0].input);
let numFrame: number = inputAccessor.data.length;
let frameRate: number = inputAccessor.data[1] - inputAccessor.data[0];
let totalTime: number = inputAccessor.data[inputAccessor.data.length - 1];
let skeletonPoseLength: number = 12 * skeleton.numJoint;
let bufferData = new Float32Array(skeletonPoseLength * numFrame);
for (var index = 0; index < skeleton.numJoint; index++) {
Expand Down Expand Up @@ -58,34 +62,132 @@ export class GLTFSubParserSkeleton {
} else {
switch (property) {
case 'scale':
for (var nFrame: number = 0; nFrame < numFrame; nFrame++) {
var srcOffset = nFrame * outputAccessor.numComponents;
var dstOffset = skeletonPoseLength * nFrame + 12 * joint.index;
bufferData[dstOffset + 0] = outputAccessor.data[srcOffset + 0]; // x
bufferData[dstOffset + 1] = outputAccessor.data[srcOffset + 1]; // y
bufferData[dstOffset + 2] = outputAccessor.data[srcOffset + 2]; // z
bufferData[dstOffset + 3] = 1;
}
if (numFrame * outputAccessor.numComponents == outputAccessor.data.length) {
for (var nFrame: number = 0; nFrame < numFrame; nFrame++) {
var srcOffset = nFrame * outputAccessor.numComponents;
var dstOffset = skeletonPoseLength * nFrame + 12 * joint.index;
bufferData[dstOffset + 0] = outputAccessor.data[srcOffset + 0]; // x
bufferData[dstOffset + 1] = outputAccessor.data[srcOffset + 1]; // y
bufferData[dstOffset + 2] = outputAccessor.data[srcOffset + 2]; // z
bufferData[dstOffset + 3] = 1;
}
} else if (inputAccessor.data.length == 2) {
let time = 0;
let t0 = inputAccessor.data[0];
let t1 = inputAccessor.data[1];

var srcOffsetA = 0 * outputAccessor.numComponents;
Vector3.HELP_0.set(
outputAccessor.data[srcOffsetA + 0],
outputAccessor.data[srcOffsetA + 1],
outputAccessor.data[srcOffsetA + 2]
);

var srcOffsetB = 1 * outputAccessor.numComponents;
Vector3.HELP_1.set(
outputAccessor.data[srcOffsetB + 0],
outputAccessor.data[srcOffsetB + 1],
outputAccessor.data[srcOffsetB + 2]
);
for (var nFrame: number = 0; nFrame < numFrame; nFrame++) {
let t = time / t1;
Vector3.HELP_2.lerp(Vector3.HELP_0, Vector3.HELP_1, t);

var dstOffset = skeletonPoseLength * nFrame + 12 * joint.index;
bufferData[dstOffset + 0] = Vector3.HELP_2.x;
bufferData[dstOffset + 1] = Vector3.HELP_2.y;
bufferData[dstOffset + 2] = Vector3.HELP_2.z;
bufferData[dstOffset + 3] = 1;

time += frameRate;
}
} else throw new Error("Unsupported animation sampler interpolation.");
break;
case 'rotation':
for (var nFrame: number = 0; nFrame < numFrame; nFrame++) {
var srcOffset = nFrame * outputAccessor.numComponents;
var dstOffset = skeletonPoseLength * nFrame + 12 * joint.index + 4;
bufferData[dstOffset + 0] = outputAccessor.data[srcOffset + 0]; // x
bufferData[dstOffset + 1] = outputAccessor.data[srcOffset + 1]; // y
bufferData[dstOffset + 2] = outputAccessor.data[srcOffset + 2]; // z
bufferData[dstOffset + 3] = outputAccessor.data[srcOffset + 3]; // w
}
if (numFrame * outputAccessor.numComponents == outputAccessor.data.length) {
for (var nFrame: number = 0; nFrame < numFrame; nFrame++) {
var srcOffset = nFrame * outputAccessor.numComponents;
var dstOffset = skeletonPoseLength * nFrame + 12 * joint.index + 4;
bufferData[dstOffset + 0] = outputAccessor.data[srcOffset + 0]; // x
bufferData[dstOffset + 1] = outputAccessor.data[srcOffset + 1]; // y
bufferData[dstOffset + 2] = outputAccessor.data[srcOffset + 2]; // z
bufferData[dstOffset + 3] = outputAccessor.data[srcOffset + 3]; // w
}
} else if (inputAccessor.data.length == 2) {
let time = 0;
let t0 = inputAccessor.data[0];
let t1 = inputAccessor.data[1];

var srcOffsetA = 0 * outputAccessor.numComponents;
Vector3.HELP_0.set(
outputAccessor.data[srcOffsetA + 0],
outputAccessor.data[srcOffsetA + 1],
outputAccessor.data[srcOffsetA + 2],
outputAccessor.data[srcOffsetA + 3],
);

var srcOffsetB = 1 * outputAccessor.numComponents;
Vector3.HELP_1.set(
outputAccessor.data[srcOffsetB + 0],
outputAccessor.data[srcOffsetB + 1],
outputAccessor.data[srcOffsetB + 2],
outputAccessor.data[srcOffsetB + 3],
);
for (var nFrame: number = 0; nFrame < numFrame; nFrame++) {
let t = time / t1;
Vector3.HELP_2.lerp(Vector3.HELP_0, Vector3.HELP_1, t);

var dstOffset = skeletonPoseLength * nFrame + 12 * joint.index + 4;
bufferData[dstOffset + 0] = Vector3.HELP_2.x;
bufferData[dstOffset + 1] = Vector3.HELP_2.y;
bufferData[dstOffset + 2] = Vector3.HELP_2.z;
bufferData[dstOffset + 3] = Vector3.HELP_2.w;

time += frameRate;
}
} else throw new Error("Unsupported animation sampler interpolation.");
break;
case 'translation':
for (var nFrame: number = 0; nFrame < numFrame; nFrame++) {
var srcOffset = nFrame * outputAccessor.numComponents;
var dstOffset = skeletonPoseLength * nFrame + 12 * joint.index + 8;
bufferData[dstOffset + 0] = outputAccessor.data[srcOffset + 0]; // x
bufferData[dstOffset + 1] = outputAccessor.data[srcOffset + 1]; // y
bufferData[dstOffset + 2] = outputAccessor.data[srcOffset + 2]; // z
bufferData[dstOffset + 3] = inputAccessor.data[nFrame * inputAccessor.numComponents];
}
if (numFrame * outputAccessor.numComponents == outputAccessor.data.length) {
for (var nFrame: number = 0; nFrame < numFrame; nFrame++) {
var srcOffset = nFrame * outputAccessor.numComponents;
var dstOffset = skeletonPoseLength * nFrame + 12 * joint.index + 8;
bufferData[dstOffset + 0] = outputAccessor.data[srcOffset + 0]; // x
bufferData[dstOffset + 1] = outputAccessor.data[srcOffset + 1]; // y
bufferData[dstOffset + 2] = outputAccessor.data[srcOffset + 2]; // z
bufferData[dstOffset + 3] = inputAccessor.data[nFrame * inputAccessor.numComponents];
}
} else if (inputAccessor.data.length == 2) {
let time = 0;
let t0 = inputAccessor.data[0];
let t1 = inputAccessor.data[1];

var srcOffsetA = 0 * outputAccessor.numComponents;
Vector3.HELP_0.set(
outputAccessor.data[srcOffsetA + 0],
outputAccessor.data[srcOffsetA + 1],
outputAccessor.data[srcOffsetA + 2]
);

var srcOffsetB = 1 * outputAccessor.numComponents;
Vector3.HELP_1.set(
outputAccessor.data[srcOffsetB + 0],
outputAccessor.data[srcOffsetB + 1],
outputAccessor.data[srcOffsetB + 2]
);
for (var nFrame: number = 0; nFrame < numFrame; nFrame++) {
let t = time / t1;
Vector3.HELP_2.lerp(Vector3.HELP_0, Vector3.HELP_1, t);

var dstOffset = skeletonPoseLength * nFrame + 12 * joint.index + 8;
bufferData[dstOffset + 0] = Vector3.HELP_2.x;
bufferData[dstOffset + 1] = Vector3.HELP_2.y;
bufferData[dstOffset + 2] = Vector3.HELP_2.z;
bufferData[dstOffset + 3] = time;

time += frameRate;
}
} else throw new Error("Unsupported animation sampler interpolation.");
break;
}
}
Expand Down

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