diff --git a/projects/projectile/index.html b/projects/projectile/index.html
index 07e03ef..3b70817 100644
--- a/projects/projectile/index.html
+++ b/projects/projectile/index.html
@@ -2,35 +2,35 @@
   <div class="col-sm">
     <div class="input-group">
       <div class="input-group-text">\(x_0\)</div>
-      <input type="number" class="form-control" v-model="x0">
+      <input type="number" class="form-control" v-model.number="x0" @input="origin_redraw">
       <div class="input-group-text">\(m\)</div>
     </div>
   </div>
   <div class="col-sm">
     <div class="input-group">
       <div class="input-group-text">\(y_0\)</div>
-      <input type="number" class="form-control" v-model="y0">
+      <input type="number" class="form-control" v-model.number="y0" @input="origin_redraw">
       <div class="input-group-text">\(m\)</div>
     </div>
   </div>
   <div class="col-sm">
     <div class="input-group">
       <div class="input-group-text">\(v_{0,x}\)</div>
-      <input type="number" class="form-control" v-model="vx0" @input="v0_redraw">
+      <input type="number" class="form-control" v-model.number="vx0" @input="origin_redraw">
       <div class="input-group-text">\(m.s\)</div>
     </div>
   </div>
   <div class="col-sm">
     <div class="input-group">
       <div class="input-group-text">\(v_{0,y}\)</div>
-      <input type="number" class="form-control" v-model="vy0" @input="v0_redraw">
+      <input type="number" class="form-control" v-model.number="vy0" @input="origin_redraw">
       <div class="input-group-text">\(m.s\)</div>
     </div>
   </div>
   <div class="col-sm">
     <div class="input-group">
       <div class="input-group-text">\(g\)</div>
-      <input type="number" class="form-control" v-model="g">
+      <input type="number" class="form-control" v-model.number="g">
       <div class="input-group-text">\(m.s^{-2}\)</div>
     </div>
   </div>
diff --git a/projects/projectile/index.js b/projects/projectile/index.js
index 1c408c0..fad3410 100644
--- a/projects/projectile/index.js
+++ b/projects/projectile/index.js
@@ -47,11 +47,7 @@ let projectile= function (p){
         return -g * t + vy0
     }
 
-    p.v0_redraw=function(vx0,vy0){
-        p.draw(p.createVector(vx0,vy0))
-    }
-    
-    let draw_vectors=function(x,y,newV0,skiparrow=false){
+    let draw_vectors=function(x,y,skiparrow=false){
         p.push()
 
         p.stroke(199, 141, 107)
@@ -60,25 +56,21 @@ let projectile= function (p){
         p.stroke(200)
         draw_arrow(p,x0,height-y0,x,y,r,c,skiparrow)
 
+
         p.stroke(121, 199, 107)
-        draw_arrow(p,x0,height-y0,x0,height-y0-50,vj,c,skiparrow,true)
+        draw_arrow(p,app.x0,height-app.y0,app.x0,height-app.y0-50,vj,c,skiparrow,true)
 
         p.stroke(199,119,107)
-        draw_arrow(p,x0,height-y0,x0+50,height-y0,vi,c,skiparrow)
-
+        draw_arrow(p,app.x0,height-app.y0,app.x0+50,height-app.y0,vi,c,skiparrow)
+        
         p.stroke(181, 107, 199)
-        if(newV0==null){
-            draw_arrow(p,x0,height-y0,x0+vx0,height-(y0+vy0),vy0t,c,skiparrow)
-        }
-        else{
-            draw_arrow(p,x0,height-y0,x0+newV0.x,height-(y0+newV0.y),vy0t,c,skiparrow)
-        }
+        draw_arrow(p,app.x0,height-app.y0,app.x0+app.vx0,height-(app.y0+app.vy0),vy0t,c,skiparrow)
 
         p.pop()
     }
     
     
-    p.draw = function(newV0=null) {
+    p.draw = function() {
         p.clear()
         let x=xt(t)
         let y=yt(t)
@@ -93,11 +85,11 @@ let projectile= function (p){
         p.pop()
                
         // Draw vectors
-        draw_vectors(x,y,newV0=newV0)
+        draw_vectors(x,y)
 
         p.push()
         p.stroke(0)
-        p.ellipse(x0,height-y0,8)
+        p.ellipse(app.x0,height-app.y0,8)
         p.pop()
         
         // Check simulation state and update it
@@ -120,11 +112,11 @@ let projectile= function (p){
 
 refresh=function(){
     t=0
-    x0=parseFloat(app.x0)
-    y0=parseFloat(app.y0)
-    vx0=parseFloat(app.vx0)
-    vy0=parseFloat(app.vy0)
-    g=parseFloat(app.g)
+    x0=app.x0
+    y0=app.y0
+    vx0=app.vx0
+    vy0=app.vy0
+    g=app.g
     p5Load()
 }
 
@@ -141,11 +133,7 @@ project_init=function(){
             g:g
         },
         methods:{
-            v0_redraw:function(){
-                if(p5_instance.end){
-                    p5_instance.v0_redraw(parseFloat(app.vx0),parseFloat(app.vy0))
-                }
-            }
+            origin_redraw:function(){p5_instance.draw()}
         }
     })
     p5Load()