tick.go

package main

// Update the start menu state every tick
func (g *Game) PerformStartMenuTick() {
	defer g.drawStartGameMenu()

	g.ui.ball.Move()
	g.checkCollision(true)
}

// Update the game state every tick.
func (g *Game) PerformGameTick() {
	// update the screen.
	// this isn't expensive since it just checks for changes on the canvas
	// and if there aren't any, nothing will be updated therefore no bloat.
	// the terminal is updated after everything has been drawn.
	// this should be called after every tick, thats why it's defered
	defer g.drawGameTick()

	if g.state == gameStatePaused || g.state == gameStateHardPaused {
		return
	}

	// keys that don't persist when game is paused
	for _, event := range *g.activeEvents {
		switch event {
		case eventP1Up:
			g.movePlayerUp(g.players.P1)
		case eventP1Down:
			g.movePlayerDown(g.players.P1)
		case eventP2Up:
			if !g.aiActive {
				g.movePlayerUp(g.players.P2)
			}
		case eventP2Down:
			if !g.aiActive {
				g.movePlayerDown(g.players.P2)
			}
		}
	}

	if g.aiActive {
		g.aiMove()
	}

	// move the ball for 1 tick
	g.ui.ball.Move()
	g.checkCollision(false)
}