refactor

confetti/confetti.go

@@ -1,15 +1,13 @@
 package confetti
 
 import (
-	"fmt"
 	"math/rand"
-	"strings"
 	"time"
 
 	"github.com/maaslalani/confetty/array"
 	"github.com/maaslalani/confetty/physics"
+	"github.com/maaslalani/confetty/simulation"
 
-	"github.com/charmbracelet/bubbles/viewport"
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/charmbracelet/lipgloss"
 	"golang.org/x/term"
@@ -23,7 +21,6 @@ const (
 var (
 	colors     = []string{"#a864fd", "#29cdff", "#78ff44", "#ff718d", "#fdff6a"}
 	characters = []string{"█", "▓", "▒", "░", "▄", "▀"}
-	// characters = []string{"▄", "▀"}
 )
 
 type frameMsg time.Time
@@ -34,57 +31,52 @@ func animate() tea.Cmd {
 	})
 }
 
-func wait(d time.Duration) tea.Cmd {
-	return func() tea.Msg {
-		time.Sleep(d)
-		return nil
-	}
-}
-
 // Confetti model
 type model struct {
-	particles []*Particle
-	viewport  viewport.Model
+	system *simulation.System
 }
 
-type Particle struct {
-	char    string
-	physics *physics.Physics
-}
-
-func InitialModel() model {
-	particles := []*Particle{}
-
-	width, _, err := term.GetSize(0)
-	if err != nil {
-		panic(err)
-	}
-
+func spawn(width, height int) []simulation.Particle {
+	particles := []simulation.Particle{}
 	for i := 0; i < numParticles; i++ {
 		x := float64(width / 2)
-		y := float64(-1)
+		y := float64(0)
 
-		p := &Particle{
-			physics: physics.New(
+		p := simulation.Particle{
+			Physics: physics.New(
 				physics.Point{X: x + (float64(width/4) * (rand.Float64() - 0.5)), Y: y},
 				physics.Vector{X: (rand.Float64() - 0.5) * 100, Y: rand.Float64() * 50},
 				physics.Vector(physics.Gravity),
 				framesPerSecond,
 			),
-			char: lipgloss.NewStyle().
+			Char: lipgloss.NewStyle().
 				Foreground(lipgloss.Color(array.Sample(colors))).
 				Render(array.Sample(characters)),
 		}
 
 		particles = append(particles, p)
 	}
+	return particles
+}
 
-	return model{particles: particles}
+func InitialModel() model {
+	width, height, err := term.GetSize(0)
+	if err != nil {
+		panic(err)
+	}
+
+	return model{system: &simulation.System{
+		Particles: spawn(width, height),
+		Frame: simulation.Frame{
+			Width:  width,
+			Height: height,
+		},
+	}}
 }
 
 // Init initializes the confetti after a small delay
 func (m model) Init() tea.Cmd {
-	return tea.Sequentially(wait(time.Second/2), animate())
+	return animate()
 }
 
 // Update updates the model every frame, it handles the animation loop and
@@ -92,36 +84,19 @@ func (m model) Init() tea.Cmd {
 func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	switch msg := msg.(type) {
 	case tea.KeyMsg:
-		return m, tea.Quit
-
-		// frame animation
-	case frameMsg:
-		particlesVisible := numParticles
-		for _, p := range m.particles {
-			p.physics.Update()
-
-			y := p.physics.PosY()
-			x := p.physics.PosX()
-
-			// Particle is out of view
-			if y >= m.viewport.Height-1 || x < 0 || x >= m.viewport.Width-1 {
-				particlesVisible -= 1
-			}
+		switch msg.String() {
+		case "ctrl+c", "q":
+			return m, tea.Quit
 		}
-
-		if particlesVisible <= 0 {
-			for _, p := range m.particles {
-				p.physics.Reset()
-			}
-		}
-
-		return m, animate()
-
-	case tea.WindowSizeMsg:
-		m.viewport.Width = msg.Width
-		m.viewport.Height = msg.Height
+		m.system.Particles = spawn(m.system.Frame.Width, m.system.Frame.Height)
+		return m, nil
+	case frameMsg:
+		m.system.Update()
+		return m, animate()
+	case tea.WindowSizeMsg:
+		m.system.Frame.Width = msg.Width
+		m.system.Frame.Height = msg.Height
 		return m, nil
-
 	default:
 		return m, nil
 	}
@@ -129,41 +104,5 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 // View displays all the particles on the screen
 func (m model) View() string {
-	height := m.viewport.Height
-	width := m.viewport.Width
-	if height <= 0 || width <= 0 {
-		return ""
-	}
-
-	var out strings.Builder
-
-	grid := make([][]string, m.viewport.Height)
-	for i := range grid {
-		grid[i] = make([]string, m.viewport.Width)
-	}
-
-	for _, p := range m.particles {
-		y := p.physics.PosY()
-		x := p.physics.PosX()
-
-		if y < 0 || x < 0 || y >= height-1 || x >= width-1 {
-			continue
-		}
-
-		grid[y][x] = p.char
-	}
-
-	// Print out grid
-	for i := range grid {
-		for _, col := range grid[i] {
-			if col == "" {
-				fmt.Fprint(&out, " ")
-			} else {
-				fmt.Fprint(&out, col)
-			}
-		}
-		fmt.Fprint(&out, "\n")
-	}
-
-	return out.String()
+	return m.system.Render()
 }