Fix particle rotation bug

Walkthrough

The pull request modifies the MainModule class in MainModule.ts by changing the visibility of the _tempVector40 variable from private static to private, transitioning it from a class-level to an instance-level variable. Additionally, the _updateShaderData method has been updated to use the instance variable this._tempVector40, which is now assigned via the copyFrom method. The overall control flow and logic of the class remain unchanged, with no new methods or alterations to existing method signatures.

Changes

File Path	Change Summary
packages/core/src/particle/modules/MainModule.ts	- Changed `_tempVector40` visibility from `private static` to `private`.
	- Updated `_updateShaderData` to use instance variable `this._tempVector40` instead of static.

Possibly related PRs

2410: The changes in the ShaderProgramPool class involve modifications to how shaders are managed, which may relate to the overall handling of particle systems and their shaders in the MainModule, particularly in how instance variables are utilized.

Suggested reviewers

zhuxudong
MrKou47

Poem

In the module where particles play,
A vector's shift brightens the day.
From static to instance, it found its way,
Each bunny now hops with less delay! 🐇✨
With shaders dancing, oh what a sight,
In the code's embrace, everything feels right!

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galacean / engine