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fix(editor): resolve sub-node coordinate misalignment via hierarchical basis change

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This commit is contained in:
ayuan9957 2026-05-18 10:50:51 +08:00
parent c400f050c1
commit 3a2d9465dd
1 changed files with 15 additions and 3 deletions
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18
Source/MetaCoreRender/Private/MetaCoreFilamentSceneBridge.cpp
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@ -242,9 +242,12 @@ public:
if (instance) {
filament::math::mat4f localTransform = tm.getTransform(instance);
// 转换为 GLM 矩阵
glm::mat4 matrix;
std::memcpy(glm::value_ptr(matrix), &localTransform[0][0], sizeof(float) * 16);
glm::mat4 filamentMatrix;
std::memcpy(glm::value_ptr(filamentMatrix), &localTransform[0][0], sizeof(float) * 16);
glm::mat4 R_minus90X = glm::rotate(glm::mat4(1.0f), glm::radians(-90.0f), {1, 0, 0});
glm::mat4 R_plus90X = glm::rotate(glm::mat4(1.0f), glm::radians(90.0f), {1, 0, 0});
glm::mat4 matrix = R_minus90X * filamentMatrix * R_plus90X;
// 拆解矩阵
glm::vec3 scale;
@ -517,6 +520,15 @@ private:
const auto& transform = gameObject.GetComponent<MetaCoreTransformComponent>();
glm::mat4 matrix = MetaCoreBuildTransformMatrix(transform);
// 【关键修复】：如果当前 entity 是子节点（即不是顶级映射的 pivotEntity）
// 由于它的父级（assetRoot）带有了 -90X 旋转，我们必须对子节点应用基变换来抵消这个旋转。
// 公式：L_filament = R(90X) * L_ecs * R(-90X)
if (LoadedAssets_.count(gameObject.GetId()) == 0) {
glm::mat4 R_plus90X = glm::rotate(glm::mat4(1.0f), glm::radians(90.0f), {1, 0, 0});
glm::mat4 R_minus90X = glm::rotate(glm::mat4(1.0f), glm::radians(-90.0f), {1, 0, 0});
matrix = R_plus90X * matrix * R_minus90X;
}
tm.setTransform(instance, *reinterpret_cast<const filament::math::mat4f*>(glm::value_ptr(matrix)));
}
}