fix not init bug with attractors

src/main.zig

@@ -83,8 +83,8 @@ const Emitter = struct {
         var yrnr = randMinMaxFloat(-0.5, 0.5);
         self.particles = try allocator.alloc(Particle, 10000);
         for (self.particles) |*p| {
-            xrnr = randMinMaxFloat(0, 2);
-            yrnr = randMinMaxFloat(0, 2);
+            xrnr = randMinMaxFloat(-2, 2);
+            yrnr = randMinMaxFloat(-2, 2);
             p.* = Particle{ .velocity = .{ .a = .{ .x = 0, .y = 0 } }, .acceleration = .{ .a = .{ .x = xrnr, .y = yrnr } } };
         }
     }
@@ -115,7 +115,6 @@ const Emitter = struct {
                 if(at.init_done != 1)
                 {
                     at.init(.{.a=.{.x=@floatFromInt(rl.getMouseX() - screenWidth / 2),.y=@floatFromInt(rl.getMouseY() - screenHeight / 2),.z=0}});
-        
                     std.debug.print("attractor allocated\n",.{});
                     break;
                 }
@@ -128,9 +127,10 @@ const Emitter = struct {
         }
         for (self.particles) |*p| {
             if (p.show == 1) {
-                p.applyGravity(0);
+                //p.applyGravity(2);
                 for (att) |at|
                 {
+                    //std.debug.print("force:{}\n",.{at.attract(p.*)});
                     p.applyForce(at.attract(p.*));
                 }
                 p.update();
@@ -153,20 +153,30 @@ const Attractor = struct {
         self.init_done = 1;
     }
     pub fn attract(self: Attractor, particle: Particle) pr.Vec {
+        if(self.init_done == 1)
+        {
             const distance = self.vec.sub(particle.position);
             var force: pr.Vec = undefined;
             if (distance.a.x != 0 and distance.a.y != 0) {
-            force.a.x = distance.a.x / 200;
-            force.a.y = distance.a.y / 200;
+                force.a.x = distance.a.x / 100;
+                force.a.y = distance.a.y / 100;
                 force.a.z = 0;
             }
             return force;
         }
+        else
+        {
+            return .{.a=.{.x=0,.y=0,.z=0}};
+        }
+    }
     pub fn draw(self: Attractor) void {
         const posx: i32 = @intFromFloat(screenWidth / 2 + self.vec.a.x);
         const posy: i32 = @intFromFloat(screenHeight / 2 + self.vec.a.y);
+        if (self.init_done == 1)
+        {
             rl.drawRectangle(posx, posy, 10, 10, rl.Color{ .r = 10, .g = 10, .b = 120, .a = 255 });
         }
+    }
 };
 fn ItoF(x: i32) f32 {
     return @as(f32, @floatFromInt(x));
@@ -233,8 +243,6 @@ pub fn main() anyerror!void {
             emitter.emit(@as(u32, @intFromFloat(value)), value2, value3);
         }
         
-
-        
         plotStr = try std.fmt.bufPrint(&plotStrBuf,"{d}, {d}, {d}, {d}\n",.{emitter.particles[0].acceleration.a.x,emitter.particles[0].position.a.x,emitter.particles[0].velocity.a.x,emitter.particles[0].show});
         try plot.log(file,plotStr);