Unity2D inconsistent AddForce - unity3d

Question

I just recently asked another question and I got answered really quick so I hope its the same with this one. Anyway, I'm making this 2D platformer (super-meat-boy like) and I've added in this cool 'Dash' ability which is triggered when you press Shift. It would add an x-axis force and a little bit of some y-axis force to give it more of a jump-like feel. However, the AddForce function is so inconsistent in the game. Sometimes, the y-axis force is larger than the x-axis and sometimes the x-axis is increased by half(??). The only reason I can think of why this happens is because I have increased the gravity for proper unrealistic but good looking jumping and slightly more increased when the player dashes. Or could it be that when I dash at the peak of my jump, there's a stronger force as compared to in the beginning of the dash? I'm so confused.
Here is everything that in the update() function.
void Update()
{
//Flipping and moving lightfeet
if (Input.GetKey(KeyCode.A))
{
anim.SetFloat("Horizontal", 1);
x = -1;
scale.x = -4;
rb.velocity = new Vector2(-speed, rb.velocity.y);
}
else if (Input.GetKey(KeyCode.D))
{
anim.SetFloat("Horizontal", 1);
x = 1;
scale.x = 4;
rb.velocity = new Vector2(speed, rb.velocity.y);
}
else //no keys pressed
{
anim.SetFloat("Horizontal", 0);
rb.velocity = new Vector2(0f, rb.velocity.y);
anim.SetBool("Sprint", false); //even after sprinting and then stopping before to jump, sprint anim wont play
}
transform.localScale = scale;
//Accumulating jump charge and increasing speed!
if (Input.GetKey(KeyCode.Space) && rb.velocity.y == 0f) //only if space is held down and there is no vertical movement
{
jumpAccumulator += Time.deltaTime * 25f; //accumulates jump power over time
if (jumpAccumulator >= maxJumpAccumulator) //maximum jump power
{
jumpAccumulator = maxJumpAccumulator;
}
speed *= sprintSpeed; //increase speed when charging up
if(speed >= maxSpeed) //maximum speed
{
speed = maxSpeed;
}
}
//Ground detection
groundHit = Physics2D.BoxCast(bcollider.bounds.center, bcollider.bounds.size, 0f, Vector2.down, 0.1f ,groundmask);
mapHit = Physics2D.BoxCast(bcollider.bounds.center, bcollider.bounds.size, 0f, Vector2.down, 0.1f, mapMask);
if (groundHit.collider != null || mapHit.collider != null) //When you on the ground!
{
anim.SetBool("Jumped", false);
anim.SetBool("DoubleJumped", false);
anim.SetBool("Dashed", false);
anim.SetBool("Fall", false);
canJump = true;
canDoubleJump = true;
canDash = false;
rb.gravityScale = 15; //nomral gravity scale
//animations for running or sprinting
if (speed <= initialspeed)
{
anim.SetBool("Sprint", false);
}
else if (speed > initialspeed && rb.velocity.x > initialspeed && rb.velocity.y == 0 || speed > initialspeed && rb.velocity.x < -initialspeed)
{
anim.SetBool("Sprint", true);
}
}
else if (groundHit.collider == null || mapHit.collider == null) //if LF is not on ground!
{
canJump = false;
anim.SetFloat("Horizontal", 0f);
}
//falling without jumping
if (rb.velocity.y < 0 && anim.GetBool("Jumped") == false && anim.GetBool("DoubleJumped") == false && anim.GetBool("Dashed") == false)
{
anim.SetBool("Fall", true);
anim.SetBool("Sprint", false);
canDash = true;
}
JumpDash();
}
void JumpDash()
{
//Jump
if (Input.GetKeyUp(KeyCode.Space) && canJump == true)
{
rb.velocity = Vector2.up * (jumpForce + jumpAccumulator);
anim.SetBool("Jumped", true);
anim.SetBool("DoubleJumped", false); //setting false to prevent bugs
anim.SetBool("Sprint", false); //setting false to sprint here as well just to prevent bugs
canDash = true;
jumpAccumulator = 1;
}
//Double Jump
if(Input.GetKeyDown(KeyCode.W) && canJump == false && canDoubleJump == true)
{
rb.velocity = Vector2.up * jumpForce;
canDoubleJump = false;
anim.SetBool("Jumped", false);
anim.SetBool("DoubleJumped", true);
anim.SetBool("Dashed", false); //disabling dash animation so it doesn't play when dashing then double jumping (because conditions for both can be true at the same time)
anim.SetBool("Sprint", false); //setting false to sprint here as well just to prevent bugs
anim.SetBool("Fall", false);
doubleJumpFX.Play();
DashFX.Stop();
}
//Dash
if(Input.GetKeyDown(KeyCode.LeftShift) && canDash == true)
{
rb.AddForce(new Vector2(dashForce * x, dashUpForce), ForceMode2D.Impulse);
rb.gravityScale += dashGravity; //increasing gravity for dashing
canDash = false;
anim.SetBool("Jumped", false);
anim.SetBool("DoubleJumped", false);
anim.SetBool("Dashed", true);
anim.SetBool("Sprint", false); //setting false to sprint here as well just to prevent bugs
doubleJumpFX.Stop();
DashFX.Play();
}
}
void OnCollisionEnter2D(Collision2D collision)
{
Debug.Log("Collider: " + collision.collider.name);
if (collision.collider.name == "platform" || collision.collider.name == "mapColliders")
{
speed = initialspeed; //set speed to normal on hitting the ground (difference between this and raycast is this returns true for only one frame)
anim.SetBool("Dashed", false); //setting false to this anim here again to prevent buggy animations
anim.SetBool("Fall", false);
doubleJumpFX.Stop();
DashFX.Stop();
}
if (collision.collider.name == "Respawn area")
{
transform.position = new Vector2(-13f, 4f);
}
}

Answer 1

The inconstancy of AddForce is because you are adding onto the player's existing force. Have you tried cancelling out existing forces before calling AddForce? Just add the following line
rb.velocity = new Vector2 (0, 0);
in front of the AddForce function. Your dash function should look like this
//Dash
if(Input.GetKeyDown(KeyCode.LeftShift) && canDash == true)
{
rb.velocity = new Vector2 (0, 0);
rb.AddForce(new Vector2(dashForce * x, dashUpForce), ForceMode2D.Impulse);
rb.gravityScale += dashGravity; //increasing gravity for dashing
canDash = false;
anim.SetBool("Jumped", false);
anim.SetBool("DoubleJumped", false);
anim.SetBool("Dashed", true);
anim.SetBool("Sprint", false); //setting false to sprint here as well just to prevent bugs
doubleJumpFX.Stop();
DashFX.Play();
}