Add Urho2DPhysicsRope Lua and AngelScript sample. [ci skip]

Bin/Data/LuaScripts/27_Urho2DPhysics.lua

@@ -171,7 +171,4 @@ function HandleUpdate(eventType, eventData)
 
     -- Move the camera, scale movement with time step
     MoveCamera(timeStep)
-
-    -- Update scene
-    scene_:Update(timeStep)
 end

Bin/Data/LuaScripts/28_Urho2DPhysicsRope.lua

@@ -0,0 +1,177 @@
+-- Urho2D physics rope sample.
+-- This sample demonstrates:
+--     - Create revolute constraint
+--     - Create roop constraint
+--     - Displaying physics debug geometry
+require "LuaScripts/Utilities/Sample"
+
+local scene_ = nil
+local cameraNode = nil
+
+function Start()
+    -- Execute the common startup for samples
+    SampleStart()
+
+    -- Create the scene content
+    CreateScene()
+
+    -- Create the UI content
+    CreateInstructions()
+
+    -- Setup the viewport for displaying the scene
+    SetupViewport()
+
+    -- Hook up to the frame update events
+    SubscribeToEvents()
+end
+
+function CreateScene()
+    scene_ = Scene()
+
+    -- Create the Octree component to the scene. This is required before adding any drawable components, or else nothing will
+    -- show up. The default octree volume will be from (-1000, -1000, -1000) to (1000, 1000, 1000) in world coordinates it
+    -- is also legal to place objects outside the volume but their visibility can then not be checked in a hierarchically
+    -- optimizing manner
+    scene_:CreateComponent("Octree")
+    scene_:CreateComponent("DebugRenderer")
+
+    -- Create a scene node for the camera, which we will move around
+    -- The camera will use default settings (1000 far clip distance, 45 degrees FOV, set aspect ratio automatically)
+    cameraNode = scene_:CreateChild("Camera")
+    -- Set an initial position for the camera scene node above the plane
+    cameraNode.position = Vector3(0.0, 5.0, -10.0)
+    local camera = cameraNode:CreateComponent("Camera")
+    camera.orthographic = true
+
+    local width = graphics.width
+    local height = graphics.height
+    camera:SetOrthoSize(Vector2(width, height) * 0.05)
+
+    -- Create 2D physics world component
+    local physicsWorld = scene_:CreateComponent("PhysicsWorld2D")
+    physicsWorld.drawJoint = true
+
+    -- Create ground.
+    local groundNode = scene_:CreateChild("Ground")
+    -- Create 2D rigid body for gound
+    local groundBody = groundNode:CreateComponent("RigidBody2D")
+    -- Create edge collider for ground
+    local groundShape = groundNode:CreateComponent("CollisionEdge2D")
+    groundShape:SetVertices(Vector2(-40.0, 0.0), Vector2(40.0, 0.0))
+
+    local y = 15.0
+    local prevBody = groundBody
+
+    local NUM_OBJECTS = 10
+    for i = 0, NUM_OBJECTS - 1 do
+        local node  = scene_:CreateChild("RigidBody")
+        -- Create rigid body
+        local body = node:CreateComponent("RigidBody2D")
+        body.bodyType = BT_DYNAMIC
+
+        -- Create box
+        local box = node:CreateComponent("CollisionBox2D")
+        -- Set friction
+        box.friction = 0.2
+        -- Set mask bits.
+        box.maskBits = 0xFFFF - 0x0002
+
+        if i == NUM_OBJECTS - 1 then
+            node.position  = Vector3(1.0 * i, y, 0.0)
+            body.angularDamping = 0.4
+            box:SetSize(3.0, 3.0)
+            box.density = 100.0
+            box.categoryBits = 0x0002
+        else
+            node.position = Vector3(0.5 + 1.0 * i, y, 0.0)
+            box:SetSize(1.0, 0.25)
+            box.density = 20.0
+            box.categoryBits = 0x0001
+        end
+
+        local joint = node:CreateComponent("ConstraintRevolute2D")
+        joint.otherBody = prevBody
+        joint.anchorPoint = Vector2(i, y)
+        joint.collideConnected = false
+
+        prevBody = body
+    end
+
+    local constraintRope = groundNode:CreateComponent("ConstraintRope2D")
+    constraintRope.otherBody = prevBody
+    constraintRope.ownerBodyAnchor = Vector2(0.0, y)
+    constraintRope.maxLength = NUM_OBJECTS - 1.0 + 0.01
+end
+
+function CreateInstructions()
+    -- Construct new Text object, set string to display and font to use
+    local instructionText = ui.root:CreateChild("Text")
+    instructionText:SetText("Use WASD keys and mouse to move, Use PageUp PageDown to zoom.")
+    instructionText:SetFont(cache:GetResource("Font", "Fonts/Anonymous Pro.ttf"), 15)
+
+    -- Position the text relative to the screen center
+    instructionText.horizontalAlignment = HA_CENTER
+    instructionText.verticalAlignment = VA_CENTER
+    instructionText:SetPosition(0, ui.root.height / 4)
+end
+
+function SetupViewport()
+    -- Set up a viewport to the Renderer subsystem so that the 3D scene can be seen. We need to define the scene and the camera
+    -- at minimum. Additionally we could configure the viewport screen size and the rendering path (eg. forward / deferred) to
+    -- use, but now we just use full screen and default render path configured in the engine command line options
+    local viewport = Viewport:new(scene_, cameraNode:GetComponent("Camera"))
+    renderer:SetViewport(0, viewport)
+end
+
+function MoveCamera(timeStep)
+    -- Do not move if the UI has a focused element (the console)
+    if ui.focusElement ~= nil then
+        return
+    end
+
+    -- Movement speed as world units per second
+    local MOVE_SPEED = 4.0
+
+    -- Read WASD keys and move the camera scene node to the corresponding direction if they are pressed
+    -- Use the TranslateRelative() function to move relative to the node's orientation. Alternatively we could
+    -- multiply the desired direction with the node's orientation quaternion, and use just Translate()
+    if input:GetKeyDown(KEY_W) then
+        cameraNode:TranslateRelative(Vector3.UP * MOVE_SPEED * timeStep)
+    end
+    if input:GetKeyDown(KEY_S) then
+        cameraNode:TranslateRelative(Vector3.DOWN * MOVE_SPEED * timeStep)
+    end
+    if input:GetKeyDown(KEY_A) then
+        cameraNode:TranslateRelative(Vector3.LEFT * MOVE_SPEED * timeStep)
+    end
+    if input:GetKeyDown(KEY_D) then
+        cameraNode:TranslateRelative(Vector3.RIGHT * MOVE_SPEED * timeStep)
+    end
+
+    if input:GetKeyDown(KEY_PAGEUP) then
+        local camera = cameraNode:GetComponent("Camera")
+        camera.zoom = camera.zoom * 1.01
+    end
+
+    if input:GetKeyDown(KEY_PAGEDOWN) then
+        local camera = cameraNode:GetComponent("Camera")
+        camera.zoom = camera.zoom * 0.99
+    end
+end
+
+function SubscribeToEvents()
+    -- Subscribe HandleUpdate() function for processing update events
+    SubscribeToEvent("Update", "HandleUpdate")
+end
+
+function HandleUpdate(eventType, eventData)
+    -- Take the frame time step, which is stored as a float
+    local timeStep = eventData:GetFloat("TimeStep")
+
+    -- Move the camera, scale movement with time step
+    MoveCamera(timeStep)
+
+    local physicsWorld = scene_:GetComponent("PhysicsWorld2D")
+    physicsWorld:DrawDebugGeometry();
+
+end

Bin/Data/Scripts/28_Urho2DPhysicsRope.as

@@ -0,0 +1,187 @@
+// Urho2D physics rope sample.
+// This sample demonstrates.
+//     - Create revolute constraint
+//     - Create roop constraint
+//     - Displaying physics debug geometry
+
+#include "Scripts/Utilities/Sample.as"
+
+Scene@ scene_;
+Node@ cameraNode;
+
+void Start()
+{
+    // Execute the common startup for samples
+    SampleStart();
+
+    // Create the scene content
+    CreateScene();
+
+    // Create the UI content
+    CreateInstructions();
+
+    // Setup the viewport for displaying the scene
+    SetupViewport();
+
+    // Hook up to the frame update events
+    SubscribeToEvents();
+}
+
+void CreateScene()
+{
+    scene_ = Scene();
+
+    // Create the Octree component to the scene. This is required before adding any drawable components, or else nothing will
+    // show up. The default octree volume will be from (-1000, -1000, -1000) to (1000, 1000, 1000) in world coordinates; it
+    // is also legal to place objects outside the volume but their visibility can then not be checked in a hierarchically
+    // optimizing manner
+    scene_.CreateComponent("Octree");
+    scene_.CreateComponent("DebugRenderer");
+
+    // Create a scene node for the camera, which we will move around
+    // The camera will use default settings (1000 far clip distance, 45 degrees FOV, set aspect ratio automatically)
+    cameraNode = scene_.CreateChild("Camera");
+    // Set an initial position for the camera scene node above the plane
+    cameraNode.position = Vector3(0.0f, 5.0f, -10.0f);
+
+    Camera@ camera = cameraNode.CreateComponent("Camera");
+    camera.orthographic = true;
+
+    uint width = graphics.width;
+    uint height = graphics.height;
+    camera.SetOrthoSize(Vector2(width, height) * 0.05f);
+
+    // Create 2D physics world component
+    PhysicsWorld2D@ physicsWorld = scene_.CreateComponent("PhysicsWorld2D");
+    physicsWorld.drawJoint = true;
+    
+    // Create ground.
+    Node@ groundNode = scene_.CreateChild("Ground");
+    // Create 2D rigid body for gound
+    RigidBody2D@ groundBody = groundNode.CreateComponent("RigidBody2D");
+    // Create edge collider for ground
+    CollisionEdge2D@ groundShape = groundNode.CreateComponent("CollisionEdge2D");
+    groundShape.SetVertices(Vector2(-40.0f, 0.0f), Vector2(40.0f, 0.0f));
+
+    const float y = 15.0f;
+    RigidBody2D@ prevBody = groundBody;
+
+    const uint NUM_OBJECTS = 10;
+    for (uint i = 0; i < NUM_OBJECTS; ++i)
+    {
+        Node@ node  = scene_.CreateChild("RigidBody");
+        // Create rigid body
+        RigidBody2D@ body = node.CreateComponent("RigidBody2D");
+        body.bodyType = BT_DYNAMIC;
+
+        // Create box
+        CollisionBox2D@ box = node.CreateComponent("CollisionBox2D");
+        // Set friction
+        box.friction = 0.2f;
+        // Set mask bits.
+        box.maskBits = 0xFFFF & ~0x0002;
+
+        if (i == NUM_OBJECTS - 1)
+        {
+            node.position  = Vector3(1.0f * i, y, 0.0f);
+            body.angularDamping = 0.4f;
+            box.SetSize(3.0f, 3.0f);
+            box.density = 100.0f;
+            box.categoryBits = 0x0002;
+        }
+        else
+        {
+            node.position = Vector3(0.5f + 1.0f * i, y, 0.0f);
+            box.SetSize(1.0f, 0.25f);
+            box.density = 20.0f;
+            box.categoryBits = 0x0001;
+        }
+
+        ConstraintRevolute2D@ joint = node.CreateComponent("ConstraintRevolute2D");
+        joint.otherBody = prevBody;
+        joint.anchorPoint = Vector2(i, y);
+        joint.collideConnected = false;
+
+        prevBody = body;
+    }
+
+    ConstraintRope2D@ constraintRope = groundNode.CreateComponent("ConstraintRope2D");
+    constraintRope.otherBody = prevBody;
+    constraintRope.ownerBodyAnchor = Vector2(0.0f, y);
+    constraintRope.maxLength = NUM_OBJECTS - 1.0f + 0.01f;
+}
+
+void CreateInstructions()
+{
+    // Construct new Text object, set string to display and font to use
+    Text@ instructionText = ui.root.CreateChild("Text");
+    instructionText.text = "Use WASD keys and mouse to move, Use PageUp PageDown to zoom.";
+    instructionText.SetFont(cache.GetResource("Font", "Fonts/Anonymous Pro.ttf"), 15);
+
+    // Position the text relative to the screen center
+    instructionText.horizontalAlignment = HA_CENTER;
+    instructionText.verticalAlignment = VA_CENTER;
+    instructionText.SetPosition(0, ui.root.height / 4);
+}
+
+void SetupViewport()
+{
+    // Set up a viewport to the Renderer subsystem so that the 3D scene can be seen. We need to define the scene and the camera
+    // at minimum. Additionally we could configure the viewport screen size and the rendering path (eg. forward / deferred) to
+    // use, but now we just use full screen and default render path configured in the engine command line options
+    Viewport@ viewport = Viewport(scene_, cameraNode.GetComponent("Camera"));
+    renderer.viewports[0] = viewport;
+}
+
+void MoveCamera(float timeStep)
+{
+    // Do not move if the UI has a focused element (the console)
+    if (ui.focusElement !is null)
+        return;
+
+    // Movement speed as world units per second
+    const float MOVE_SPEED = 4.0f;
+    
+    // Read WASD keys and move the camera scene node to the corresponding direction if they are pressed
+    // Use the TranslateRelative() function to move relative to the node's orientation. Alternatively we could
+    // multiply the desired direction with the node's orientation quaternion, and use just Translate()
+    if (input.keyDown['W'])
+        cameraNode.TranslateRelative(Vector3(0.0f, 1.0f, 0.0f) * MOVE_SPEED * timeStep);
+    if (input.keyDown['S'])
+        cameraNode.TranslateRelative(Vector3(0.0f, -1.0f, 0.0f) * MOVE_SPEED * timeStep);
+    if (input.keyDown['A'])
+        cameraNode.TranslateRelative(Vector3(-1.0f, 0.0f, 0.0f) * MOVE_SPEED * timeStep);
+    if (input.keyDown['D'])
+        cameraNode.TranslateRelative(Vector3(1.0f, 0.0f, 0.0f) * MOVE_SPEED * timeStep);
+
+    if (input.keyDown[KEY_PAGEUP])
+    {
+        Camera@ camera = cameraNode.GetComponent("Camera");
+        camera.zoom = camera.zoom * 1.01f;
+    }
+    
+    if (input.keyDown[KEY_PAGEDOWN])
+    {
+        Camera@ camera = cameraNode.GetComponent("Camera");
+        camera.zoom = camera.zoom * 0.99f;
+    }
+}
+
+void SubscribeToEvents()
+{
+    // Subscribe HandleUpdate() function for processing update events
+    SubscribeToEvent("Update", "HandleUpdate");
+}
+
+void HandleUpdate(StringHash eventType, VariantMap& eventData)
+{
+    // Take the frame time step, which is stored as a float
+    float timeStep = eventData["TimeStep"].GetFloat();
+
+    // Move the camera, scale movement with time step
+    MoveCamera(timeStep);
+
+    PhysicsWorld2D@ physicsWorld = scene_.GetComponent("PhysicsWorld2D");
+    physicsWorld.DrawDebugGeometry();
+}
+