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fix(assets): keep polygon sprite-frame vertices across reimport #898

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fix(assets): keep polygon sprite-frame vertices across reimport #898

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48 changes: 27 additions & 21 deletions src/core/assets/asset-handler/assets/sprite-frame.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -353,30 +353,36 @@ function initVerticesData(userData: SpriteFrameBaseAssetUserData) {
};
}
const vertices = userData.vertices;
vertices.rawPosition.length = 0;

if (userData.meshType === cc.SpriteFrame.MeshType.POLYGON) {
// 使用 Bayazit 来生成顶点并赋值
} else {
const width = userData.width;
const height = userData.height;
const halfWidth = width / 2;
const halfHeight = height / 2;
const texw = userData.rawWidth;
const texh = userData.rawHeight;
const rectX = userData.trimX;
const rectY = texh - userData.trimY - height;
const l = texw === 0 ? 0 : rectX / texw;
const r = texw === 0 ? 1 : (rectX + width) / texw;
const t = texh === 0 ? 1 : (rectY + height) / texh;
const b = texh === 0 ? 0 : rectY / texh;
vertices.rawPosition = [-halfWidth, -halfHeight, 0, halfWidth, -halfHeight, 0, -halfWidth, halfHeight, 0, halfWidth, halfHeight, 0];
vertices.uv = [rectX, rectY + height, rectX + width, rectY + height, rectX, rectY, rectX + width, rectY];
vertices.nuv = [l, b, r, b, l, t, r, t];
vertices.indexes = [0, 1, 2, 2, 1, 3];
vertices.minPos = [-halfWidth, -halfHeight, 0];
vertices.maxPos = [halfWidth, halfHeight, 0];
// PinK Sprite Editor writes polygon vertices into meta. Keep them across
// reimport — the Bayazit generator below was never implemented, and
// clearing rawPosition would destroy custom meshes on every save.
if (Array.isArray(vertices.rawPosition) && vertices.rawPosition.length >= 9 && vertices.rawPosition.length % 3 === 0) {
return;
}
console.warn(`SpriteFrame polygon mesh has invalid rawPosition length ${Array.isArray(vertices.rawPosition) ? vertices.rawPosition.length : 0}; falling back to rect mesh.`);
userData.meshType = cc.SpriteFrame.MeshType.RECT;
}

const width = userData.width;
const height = userData.height;
const halfWidth = width / 2;
const halfHeight = height / 2;
const texw = userData.rawWidth;
const texh = userData.rawHeight;
const rectX = userData.trimX;
const rectY = texh - userData.trimY - height;
const l = texw === 0 ? 0 : rectX / texw;
const r = texw === 0 ? 1 : (rectX + width) / texw;
const t = texh === 0 ? 1 : (rectY + height) / texh;
const b = texh === 0 ? 0 : rectY / texh;
vertices.rawPosition = [-halfWidth, -halfHeight, 0, halfWidth, -halfHeight, 0, -halfWidth, halfHeight, 0, halfWidth, halfHeight, 0];
vertices.uv = [rectX, rectY + height, rectX + width, rectY + height, rectX, rectY, rectX + width, rectY];
vertices.nuv = [l, b, r, b, l, t, r, t];
vertices.indexes = [0, 1, 2, 2, 1, 3];
vertices.minPos = [-halfWidth, -halfHeight, 0];
vertices.maxPos = [halfWidth, halfHeight, 0];
}

function initVertices(sprite: cc.SpriteFrame, userData: SpriteFrameBaseAssetUserData) {
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