Jump.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class Jump : AbstractBehavior {

	public float jumpHeight = 5;
	public float airJumpHeight = 5;
	public int airJumpCount = 1;
	public float wallJumpHeight = 3;
	public float wallJumpHorizontalSpeed = 5;

	bool jumpRequested;

	int airJumpsMade = 0;


	void Update() {
		if (!jumpRequested && inputState.GetButtonPressed(inputButtons[0])) {
			jumpRequested = true;
		}
		float jumpState;
		Vector2 vel = body.velocity;
		jumpState = Mathf.Abs(vel.y) / GetJumpVelocity(jumpHeight);
		jumpState = 1 - Mathf.Clamp01(jumpState);
		if (jumpState == 1) {
			jumpState = 0;
		}
		jumpState = Mathf.Sqrt(jumpState);
		animator.SetFloat("jump state", jumpState);
	}

	void FixedUpdate() {
		if (jumpRequested) {
			Activate();
			jumpRequested = false;
		}
	}

	public void Activate() {
		if (collisionState.onGround) {
			// ground jump
			airJumpsMade = 0;
			Vector2 vel = body.velocity;
			vel.y = GetJumpVelocity(jumpHeight);
			body.velocity = vel;
		}
		else if (collisionState.onWall) {
			// wall jump
			Vector2 vel = Vector2.up * GetJumpVelocity(wallJumpHeight);
			if (collisionState.onWallLeft) {
				vel += Vector2.right * wallJumpHorizontalSpeed;
				inputState.direction = Directions.Right;
			}
			if (collisionState.onWallRight) {
				vel -= Vector2.right * wallJumpHorizontalSpeed;
				inputState.direction = Directions.Left;
			}
			body.velocity = vel;
		}
		else if (airJumpsMade < airJumpCount) {
			// air jump
			Vector2 vel = body.velocity;
			vel.y = GetJumpVelocity(airJumpHeight);
			body.velocity = vel;
			airJumpsMade ++;
		}
	}

	float GetJumpVelocity(float height) {
		float gravity = Physics2D.gravity.y*body.gravityScale;
		return Mathf.Sqrt(-2 * gravity * height);
	}

}