I have no experience in GLSL shaders. It would be a great help if anyone can guide me to achieve the same mirror effect in playcanvas programmatically.
To make floor reflecting, you will need to render scene with camera that is positioned and rotated mirrored from actual camera using plane normal as mirror vector. Then you can use same texture to project on floor using shaders.
Start small, and learn bit by bit to move towards your desired target, developing usually doesn’t have easy and quick shortcuts.