Demo cleanup (2).

Author: AndresTraks

BulletSharpPInvoke/demos/BasicDemo/BasicDemo.cs

@@ -7,16 +7,12 @@ namespace BasicDemo
 {
     class BasicDemo : Demo
     {
-        Vector3 eye = new Vector3(30, 20, 10);
-        Vector3 target = new Vector3(0, 5, -4);
+        Vector3 eye = new Vector3(30, 20, 15);
+        Vector3 target = new Vector3(0, 3, 0);
 
         // create 125 (5x5x5) dynamic objects
         const int ArraySizeX = 5, ArraySizeY = 5, ArraySizeZ = 5;
-
-        // scaling of the objects (0.1 = 20 centimeter boxes )
-        const float StartPosX = -5;
-        const float StartPosY = -5;
-        const float StartPosZ = -3;
+        Vector3 startPosition = new Vector3(0, 2, 0);
 
         protected override void OnInitialize()
         {
@@ -36,48 +32,45 @@ protected override void OnInitializePhysics()
             World = new DiscreteDynamicsWorld(Dispatcher, Broadphase, null, CollisionConf);
             World.Gravity = new Vector3(0, -10, 0);
 
-            // create the ground
-            BoxShape groundShape = new BoxShape(50, 1, 50);
+            CreateGround();
+            CreateBoxes();
+        }
+
+        private void CreateGround()
+        {
+            var groundShape = new BoxShape(50, 1, 50);
             //groundShape.InitializePolyhedralFeatures();
-            //CollisionShape groundShape = new StaticPlaneShape(new Vector3(0,1,0), 50);
+            //var groundShape = new StaticPlaneShape(Vector3.UnitY, 1);
 
             CollisionShapes.Add(groundShape);
             CollisionObject ground = LocalCreateRigidBody(0, Matrix.Identity, groundShape);
             ground.UserObject = "Ground";
+        }
 
-            // create a few dynamic rigidbodies
+        private void CreateBoxes()
+        {
             const float mass = 1.0f;
-
-            BoxShape colShape = new BoxShape(1);
+            var colShape = new BoxShape(1);
             CollisionShapes.Add(colShape);
             Vector3 localInertia = colShape.CalculateLocalInertia(mass);
 
-            const float startX = StartPosX - ArraySizeX / 2;
-            const float startY = StartPosY;
-            const float startZ = StartPosZ - ArraySizeZ / 2;
-
-            RigidBodyConstructionInfo rbInfo =
-                new RigidBodyConstructionInfo(mass, null, colShape, localInertia);
+            var rbInfo = new RigidBodyConstructionInfo(mass, null, colShape, localInertia);
 
-            for (int k = 0; k < ArraySizeY; k++)
+            for (int y = 0; y < ArraySizeY; y++)
             {
-                for (int i = 0; i < ArraySizeX; i++)
+                for (int x = 0; x < ArraySizeX; x++)
                 {
-                    for (int j = 0; j < ArraySizeZ; j++)
+                    for (int z = 0; z < ArraySizeZ; z++)
                     {
-                        Matrix startTransform = Matrix.Translation(
-                            2 * i + startX,
-                            2 * k + startY,
-                            2 * j + startZ
-                        );
-
-                        // using motionstate is recommended, it provides interpolation capabilities
-                        // and only synchronizes 'active' objects
-                        rbInfo.MotionState = new DefaultMotionState(startTransform);
-                        RigidBody body = new RigidBody(rbInfo);
+                        Vector3 position = startPosition + 2 * new Vector3(x, y, z);
 
                         // make it drop from a height
-                        body.Translate(new Vector3(0, 20, 0));
+                        position += new Vector3(0, 10, 0);
+
+                        // using MotionState is recommended, it provides interpolation capabilities
+                        // and only synchronizes 'active' objects
+                        rbInfo.MotionState = new DefaultMotionState(Matrix.Translation(position));
+                        var body = new RigidBody(rbInfo);
 
                         World.AddRigidBody(body);
                     }