nimcity/src/pong/pong.nim

import sdl2

import ./player
import ./ball
import ./cons
import ./scores
import ./font
import ./collision


type
    Pong* = ref object
        isRun: bool
        human, robot: Player
        ball: Ball
        renderer:RendererPtr
        scores: Scores
        collision:Collision

proc NewPong*(font:Font, renderer:RendererPtr): Pong =
    var
        human=NewHuman(cons.PaddleWidth, "user", renderer)
        robot=NewRobot(cons.WindowWidth - 2 * cons.PaddleWidth, renderer)
        scores= NewScores(font)
        ball=NewBall(renderer, scores)
    Pong(
      isRun: true,
      renderer:renderer,
      human: human,
      robot: robot,
      ball: ball,
      scores: scores,
      collision:NewCollision(human, robot, ball)
    )

proc keyDown*(sf:var Pong, dt:float32)=
    sf.human.Up(dt)

proc keyUp*(sf:var Pong, dt:float32)=
    sf.human.Down(dt)

proc stopHuman*(sf: var Pong)=
  sf.human.Stop()

proc update*(sf:var  Pong, dt: float32) =
    sf.collision.update()
    sf.human.update(dt)
    sf.robot.update(dt, sf.ball.y)
    let
        distRobot = (sf.ball.y + BallRadius) - (sf.robot.y + PaddleHeight / 2)
        req = BallUpdateReq(
            dTime:dt,
            distRobot:distRobot,
            isColHuman:sf.collision.isCollisionHuman,
            isColRobot:sf.collision.isCollisionRobot,
            humanX:sf.human.x,
            robotX:sf.robot.x
        )
    sf.ball.update(req)

proc draw*(sf:var Pong) =
  sf.renderer.setDrawColor 0, 0, 0, 255 # black
  sf.renderer.clear()
  sf.human.draw()
  sf.robot.draw()
  sf.ball.draw()
  sf.scores.draw()