[游戏开发]unity 容易出错的知识点总结

1：调用Debug.drawLine或者Debug.drawRay运行的时候没有显示出来画的线段，原因：game scene选项没有启用Gizmos

?2: 在调用射线监测的时候，目标layerMask应该是

Physics.Raycast(playerPos,dir,10f,1 << LayerMask.NameToLayer("Environment"));

而不是?Physics.Raycast(playerPos,dir,10f, LayerMask.NameToLayer("Environment"));

3：朝向一个目标看：

Vector3 newDir = Vector3.zero;
		if(dir == DIRECTION.Right || dir == DIRECTION.Left) {
			if(isGrounded) { 
				newDir = Vector3.RotateTowards(transform.forward, Vector3.forward * -(int)dir, rotationSpeed * Time.deltaTime, 0.0f);
			} else {
				newDir = Vector3.RotateTowards(transform.forward, Vector3.forward * -(int)dir, jumpRotationSpeed * Time.deltaTime, 0.0f);
			}

			transform.rotation = Quaternion.LookRotation(newDir);
			currentDirection = dir;
		}