Improve cloth demo

notgiven688 · Oct 28, 2023 · 83b5344 · 83b5344
1 parent 982b2e9
commit 83b5344
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Showing 2 changed files with 20 additions and 11 deletions.
diff --git a/src/JitterDemo/Demos/Demo17.cs b/src/JitterDemo/Demos/Demo17.cs
@@ -25,11 +25,10 @@ public void Build()
 
         pg.ResetScene();
 
-        const int len = 30;
-        const float scale = 0.3f;
-
+        const int len = 40;
+        const float scale = 0.2f;
         const int leno2 = len / 2;
-
+        
         List<JTriangle> tris = new();
 
         for (int i = 0; i < len; i++)
@@ -40,12 +39,24 @@ public void Build()
                 JVector v1 = new JVector((-leno2 + e + 0) * scale, 6, (-leno2 + i + 1) * scale);
                 JVector v2 = new JVector((-leno2 + e + 1) * scale, 6, (-leno2 + i + 0) * scale);
                 JVector v3 = new JVector((-leno2 + e + 1) * scale, 6, (-leno2 + i + 1) * scale);
-                tris.Add(new JTriangle(v0, v1, v2));
-                tris.Add(new JTriangle(v1, v2, v3));
-                tris.Add(new JTriangle(v0, v2, v3));
+
+                bool even = (e + i) % 2 == 0;
+
+                if (even)
+                {
+                    tris.Add(new JTriangle(v0, v1, v2));
+                    tris.Add(new JTriangle(v1, v2, v3));
+                }
+                else
+                {
+                    tris.Add(new JTriangle(v1, v3, v0));
+                    tris.Add(new JTriangle(v3, v2, v0));
+                }
             }
         }
-
+
+        cloth = new SoftBodyCloth(world, tris);
+
         var b0 = world.CreateRigidBody();
         b0.Position = new JVector(-1, 10, 0);
         b0.AddShape(new BoxShape(1));
@@ -60,8 +71,6 @@ public void Build()
         b2.Position = new JVector(1, 11, 0);
         b2.AddShape(new SphereShape(0.5f));
 
-        cloth = new SoftBodyCloth(world, tris);
-
         world.DynamicTree.Filter = DynamicTreeCollisionFilter.Filter;
         world.BroadPhaseFilter = new BroadPhaseCollisionFilter(world);
 

diff --git a/src/JitterDemo/Demos/SoftBody/SoftBodyCloth.cs b/src/JitterDemo/Demos/SoftBody/SoftBodyCloth.cs
@@ -100,7 +100,7 @@ private void Build()
         foreach (var vertex in vertices)
         {
             RigidBody body = world.CreateRigidBody();
-            body.SetMassInertia(JMatrix.Identity * 1000, 0.1f);
+            body.SetMassInertia(JMatrix.Identity * 1000, 0.01f);
             body.Position = vertex;
             Vertices.Add(body);
         }