mais parâmetros

go.mod

@@ -1,4 +1,4 @@
-module app
+module magnets
 
 go 1.20
 

main.go

@@ -1,6 +1,11 @@
 package main
 
+// veja: 
+// The relationship between chaos, fractal and physics
+// https://www.youtube.com/watch?v=C5Jkgvw-Z6E
+
 import (
+	// "fmt"
 	"fmt"
 	"math"
 	"math/rand"
@@ -21,19 +26,26 @@ type ball struct {
     originGrid rl.Vector2
     radius float32
     speed rl.Vector2
+    steps int
 }
 
-// parametros
-const windowWidth = 800
-const windowHeight = 450
-const magnetRadius = 15 
-const magnetForce = 8
+// parâmetros
+const windowWidth = 700
+const windowHeight = 700
+const magnetRadius = 8 
+const magnetForce = 10
 const magnetsDistance float32 = 80
-const verticalGrids = 100
-const horizontalGrids = 100
-const ballMass float32 = 2
-const gravConst float32 = 8
-const magnetsAngle = 45
+const gridDivision = 10
+const verticalGrids = windowHeight/gridDivision
+const horizontalGrids = windowWidth/gridDivision
+const ballMass float32 = 1 // sensivel
+const gravConst float32 = 1 // sensivel
+const magnetsAngle = 0
+const luminance = false
+const hideBalls = false
+const hideMagnets = false
+var startingBallSpeed = rl.Vector2{X: -0.5, Y: 0.5} // joga a bola em alguma diração 
+// antes que ela comece a ser atraida pelos ímãs
 
 
 func (ball *ball) update(magnets []magnet) (bool, rl.Color) {
@@ -57,6 +69,7 @@ func (ball *ball) update(magnets []magnet) (bool, rl.Color) {
     for _, magnet := range magnets {
         distance := rl.Vector2Distance(ball.pos, magnet.pos)
         if distance < magnet.radius + ball.radius {
+            if luminance { magnet.color.A = uint8(ball.steps) }
             return true, magnet.color
         }
     }
@@ -64,11 +77,7 @@ func (ball *ball) update(magnets []magnet) (bool, rl.Color) {
 
 }
 
-
-
 func main() {
-
-
 	rl.InitWindow(
         windowWidth, windowHeight, 
         "raylib [core] example - basic window",
@@ -146,7 +155,7 @@ func main() {
         y := randomGrid.Y * gridSize.Y + gridSize.Y/2
         fallingBall = append(fallingBall, &ball{
             pos: rl.Vector2{X: x, Y: y},
-            speed: rl.Vector2{},
+            speed: startingBallSpeed,
             radius: magnetRadius/2,
             originGrid: randomGrid,
         })
@@ -165,9 +174,11 @@ func main() {
                 rl.DrawRectangleV(pos, gridSize, grid[y][x])
             }
         }
-        for i := range magnets {
-            rl.DrawCircleV(magnets[i].pos, magnetRadius+2, rl.Black)
-            rl.DrawCircleV(magnets[i].pos, magnetRadius, magnets[i].color)
+        if !hideMagnets {
+            for i := range magnets {
+                rl.DrawCircleV(magnets[i].pos, magnetRadius+2, rl.Black)
+                rl.DrawCircleV(magnets[i].pos, magnetRadius, magnets[i].color)
+            }
         }
 
         if len(fallingBall) == 0 {
@@ -179,22 +190,25 @@ func main() {
         for i := 0; i < len(fallingBall); i++ {
             ball := fallingBall[i]
 
-            // rl.DrawCircleV(
-            //     ball.pos, ball.radius/2+1, rl.Black,
-            // )
-            // rl.DrawCircleV(
-            //     ball.pos, ball.radius/2, 
-            //     rl.NewColor(100, 100, 100, 255),
-            // )
-            rl.DrawRectangleV(
-                rl.Vector2{X: ball.pos.X-1, Y: ball.pos.Y-1 }, 
-                rl.Vector2{X: ball.radius+1, Y: ball.radius+1}, 
-                rl.Black,
-            )
-            rl.DrawRectangleV(
-                ball.pos, rl.Vector2{X: ball.radius, Y: ball.radius}, 
-                rl.NewColor(100, 100, 100, 255),
-            )
+            if !hideBalls {
+                // rl.DrawCircleV(
+                //     ball.pos, ball.radius/2+1, rl.Black,
+                // )
+                // rl.DrawCircleV(
+                //     ball.pos, ball.radius/2, 
+                //     rl.NewColor(100, 100, 100, 255),
+                // )
+                // bolas são difíceis de se calcular =/
+                rl.DrawRectangleV(
+                    rl.Vector2{X: ball.pos.X-1, Y: ball.pos.Y-1 }, 
+                    rl.Vector2{X: ball.radius+1, Y: ball.radius+1}, 
+                    rl.Black,
+                )
+                rl.DrawRectangleV(
+                    ball.pos, rl.Vector2{X: ball.radius, Y: ball.radius}, 
+                    rl.NewColor(100, 100, 100, 255),
+                )
+            }
             if hit, color := ball.update(magnets); hit {
                 x := ball.originGrid.X
                 y := ball.originGrid.Y
@@ -203,22 +217,14 @@ func main() {
                 fallingBall[i] = fallingBall[len(fallingBall)-1]
                 fallingBall = fallingBall[:len(fallingBall)-1]
             }
+            ball.steps += 1
         }
+
         // fmt.Println("foo")
 
         rl.EndDrawing()
 	}
 
-    stat := make(map[rl.Color]int)
-    stat[rl.Red] = 0
-    stat[rl.Green] = 0
-    stat[rl.Blue] = 0
+    fmt.Println("hello world")
 
-    for y := range grid {
-        for x := range grid[y] {
-            stat[grid[y][x]] += 1
-        }
-    }
-
-    fmt.Println(stat)
 }