add PhysX SDK and some tweaks

ExampleApp/Src/PlayerSphere.cs

@@ -0,0 +1,92 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using Prism;
+
+namespace Example
+{
+    class PlayerSphere : Entity
+    {
+        public float HorizontalForce = 10.0f;
+        public float JumpForce = 10.0f;
+
+        private RigidBodyComponent m_PhysicsBody;
+        private MaterialInstance m_MeshMaterial;
+
+        public int m_CollisionCounter = 0;
+
+        public Vec3 MaxSpeed = new Vec3();
+
+        private bool Colliding => m_CollisionCounter > 0;
+
+        void OnCreate()
+        {
+            m_PhysicsBody = GetComponent<RigidBodyComponent>();
+
+            MeshComponent meshComponent = GetComponent<MeshComponent>();
+            m_MeshMaterial = meshComponent.Mesh.GetMaterial(0);
+            m_MeshMaterial.Set("u_Metalness", 0.0f);
+
+            AddCollisionBeginCallback(OnPlayerCollisionBegin);
+            AddCollisionEndCallback(OnPlayerCollisionEnd);
+        }
+
+        void OnPlayerCollisionBegin(float value)
+        {
+            m_CollisionCounter++;
+        }
+
+        void OnPlayerCollisionEnd(float value)
+        {
+            m_CollisionCounter--;
+        }
+
+        void OnUpdate(float ts)
+        {
+            float movementForce = HorizontalForce;
+
+            if (!Colliding)
+            {
+                movementForce *= 0.4f;
+            }
+
+            Vec3 forward = GetForwardDirection();
+            Vec3 right = GetRightDirection();
+			Vec3 up = GetUpDirection();
+
+			if (Input.IsKeyPressed(KeyCode.W))
+				m_PhysicsBody.AddForce(forward * movementForce);
+			else if (Input.IsKeyPressed(KeyCode.S))
+				m_PhysicsBody.AddForce(forward * -movementForce);
+
+			if (Input.IsKeyPressed(KeyCode.D))
+				m_PhysicsBody.AddForce(right * movementForce);
+			else if (Input.IsKeyPressed(KeyCode.A))
+				m_PhysicsBody.AddForce(right * -movementForce);
+
+			if (Colliding && Input.IsKeyPressed(KeyCode.Space))
+                m_PhysicsBody.AddForce(up * JumpForce);
+
+            if (Colliding)
+                m_MeshMaterial.Set("u_AlbedoColor", new Vec3(1.0f, 0.0f, 0.0f));
+            else
+                m_MeshMaterial.Set("u_AlbedoColor", new Vec3(0.8f, 0.8f, 0.8f));
+
+            Vec3 linearVelocity = m_PhysicsBody.GetLinearVelocity();
+            linearVelocity.Clamp(new Vec3(-MaxSpeed.X, -1000, -MaxSpeed.Z), MaxSpeed);
+            m_PhysicsBody.SetLinearVelocity(linearVelocity);
+
+            if (Input.IsKeyPressed(KeyCode.R))
+            {
+                Mat4 transform = GetTransform();
+                transform.Translation = new Vec3(0.0f);
+                SetTransform(transform);
+            }
+
+        }
+
+    }
+}