2.3 Movement

Design

Objectives

Set up environment for the Player

• Set up reletive speed and gravity

• Add colision and controls for the player

Usability Features

Key Variables

Variable Name	Use
Set Gravity	Sets the constant downward acceleration
Set Speed	Sets Movement speed
constant add player	Add player into the environment
Anchor	Show the anchor point of the Sprite
Load Sprite	Used to input what each symbol represents in the level
Area	Collision detection (T/F)
Body	Static properties (T/F)
onKeyPress	Reads external input

Pseudocode

Function for the Player:
    Create a player sprite
    Define an area for the player
    Add a body to the player
    Set the anchor point to the bottom of the player sprite
    Assign the label "player" to the player

    When the "space" key is pressed:
        If the player is on the ground:
            Make the player jump

    When the "left" key is held down:
        Move the player to the left with a speed of SPEED

    When the "right" key is held down:
        Move the player to the right with a speed of SPEED
  
  

Development

Outcome

  "@": () => [
        sprite("player"),
        area(),
        body(),
        anchor("bot"),
        "player",
        
   onKeyPress("space", () => {
    if (player.isGrounded()) {
      player.jump();
    }
  });

  onKeyDown("left", () => {
    player.move(-SPEED, 0);
  });

  onKeyDown("right", () => {
    player.move(SPEED, 0);
  });

Challenges

setting a speed value that makes platforming smooth and movement feel responsive

Testing

Evidence for testing

Tests

Test	Instructions	What I expect	What actually happens	Pass/Fail
1	Input Left	Move left	As expected	Pass
2	Input Right	Move Right	As expected	Pass
3	Input space	Move up	As expected	Pass
4	Walk over platform	Player collides with the platforms	As expected	Pass

Evidence