Add Urho2DPhysicsRope sample.[ci skip]

Source/Samples/28_Urho2DPhysicsRope/CMakeLists.txt

@@ -0,0 +1,33 @@
+#
+# Copyright (c) 2008-2014 the Urho3D project.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+
+# Define target name
+set (TARGET_NAME 28_Urho2DPhysicsRope)
+
+# Define source files
+define_source_files (EXTRA_H_FILES ${COMMON_SAMPLE_H_FILES})
+
+# Setup target with resource copying
+setup_main_executable ()
+
+# Setup test cases
+add_test (NAME ${TARGET_NAME} COMMAND ${TARGET_NAME} -timeout ${TEST_TIME_OUT})

Source/Samples/28_Urho2DPhysicsRope/Urho2DPhysicsRope.cpp

@@ -0,0 +1,228 @@
+//
+// Copyright (c) 2008-2014 the Urho3D project.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
+
+#include "Camera.h"
+#include "CollisionBox2D.h"
+#include "CollisionEdge2D.h"
+#include "ConstraintRevolute2D.h"
+#include "ConstraintRope2D.h"
+#include "CoreEvents.h"
+#include "DebugRenderer.h"
+#include "Engine.h"
+#include "Font.h"
+#include "Graphics.h"
+#include "Input.h"
+#include "Octree.h"
+#include "PhysicsWorld2D.h"
+#include "Renderer.h"
+#include "RigidBody2D.h"
+#include "Scene.h"
+#include "SceneEvents.h"
+#include "Text.h"
+#include "Urho2DPhysicsRope.h"
+
+#include "DebugNew.h"
+
+DEFINE_APPLICATION_MAIN(Urho2DPhysicsRope)
+
+static const unsigned NUM_OBJECTS = 10;
+
+Urho2DPhysicsRope::Urho2DPhysicsRope(Context* context) : Sample(context)
+{    
+}
+
+void Urho2DPhysicsRope::Start()
+{
+    // Execute base class startup
+    Sample::Start();
+
+    // 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 Urho2DPhysicsRope::CreateScene()
+{
+    scene_ = new Scene(context_);
+    scene_->CreateComponent<Octree>();
+    scene_->CreateComponent<DebugRenderer>();
+    // Create camera node
+    cameraNode_ = scene_->CreateChild("Camera");
+    // Set camera's position
+    cameraNode_->SetPosition(Vector3(0.0f, 5.0f, -10.0f));
+
+    Camera* camera = cameraNode_->CreateComponent<Camera>();
+    camera->SetOrthographic(true);
+
+    Graphics* graphics = GetSubsystem<Graphics>();
+    float width = (float)graphics->GetWidth();
+    float height = (float)graphics->GetHeight();
+    camera->SetOrthoSize(Vector2(width, height) * 0.05f);
+
+    // Create 2D physics world component
+    PhysicsWorld2D* physicsWorld = scene_->CreateComponent<PhysicsWorld2D>();
+    physicsWorld->SetDrawJoint(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;
+
+    for (unsigned i = 0; i < NUM_OBJECTS; ++i)
+    {
+        Node* node  = scene_->CreateChild("RigidBody");
+
+        // Create rigid body
+        RigidBody2D* body = node->CreateComponent<RigidBody2D>();
+        body->SetBodyType(BT_DYNAMIC);
+
+        // Create box
+        CollisionBox2D* box = node->CreateComponent<CollisionBox2D>();
+        // Set friction
+        box->SetFriction(0.2f);
+        // Set mask bits.
+        box->SetMaskBits(0xFFFF & ~0x0002);
+
+        if (i == NUM_OBJECTS - 1)
+        {
+            node->SetPosition(Vector3(1.0f * i, y, 0.0f));
+            body->SetAngularDamping(0.4f);
+            box->SetSize(3.0f, 3.0f);
+            box->SetDensity(100.0f);
+            box->SetCategoryBits(0x0002);
+        }
+        else
+        {
+            node->SetPosition(Vector3(0.5f + 1.0f * i, y, 0.0f));
+            box->SetSize(1.0f, 0.25f);
+            box->SetDensity(20.0f);
+            box->SetCategoryBits(0x0001);
+        }
+
+        ConstraintRevolute2D* joint = node->CreateComponent<ConstraintRevolute2D>();
+        joint->SetOtherBody(prevBody);
+        joint->SetAnchorPoint(Vector2(float(i), y));
+        joint->SetCollideConnected(false);
+
+        prevBody = body;
+    }
+
+    ConstraintRope2D* constraintRope = groundNode->CreateComponent<ConstraintRope2D>();
+    constraintRope->SetOtherBody(prevBody);
+    constraintRope->SetOwnerBodyAnchor(Vector2(0.0f, y));
+    constraintRope->SetMaxLength(NUM_OBJECTS - 1.0f + 0.01f);
+}
+
+void Urho2DPhysicsRope::CreateInstructions()
+{
+    ResourceCache* cache = GetSubsystem<ResourceCache>();
+    UI* ui = GetSubsystem<UI>();
+
+    // Construct new Text object, set string to display and font to use
+    Text* instructionText = ui->GetRoot()->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->SetHorizontalAlignment(HA_CENTER);
+    instructionText->SetVerticalAlignment(VA_CENTER);
+    instructionText->SetPosition(0, ui->GetRoot()->GetHeight() / 4);
+}
+
+void Urho2DPhysicsRope::SetupViewport()
+{
+    Renderer* renderer = GetSubsystem<Renderer>();
+
+    // Set up a viewport to the Renderer subsystem so that the 3D scene can be seen
+    SharedPtr<Viewport> viewport(new Viewport(context_, scene_, cameraNode_->GetComponent<Camera>()));
+    renderer->SetViewport(0, viewport);
+}
+
+void Urho2DPhysicsRope::MoveCamera(float timeStep)
+{
+    // Do not move if the UI has a focused element (the console)
+    if (GetSubsystem<UI>()->GetFocusElement())
+        return;
+
+    Input* input = GetSubsystem<Input>();
+
+    // 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->GetKeyDown('W'))
+        cameraNode_->TranslateRelative(Vector3::UP * MOVE_SPEED * timeStep);
+    if (input->GetKeyDown('S'))
+        cameraNode_->TranslateRelative(Vector3::DOWN* MOVE_SPEED * timeStep);
+    if (input->GetKeyDown('A'))
+        cameraNode_->TranslateRelative(Vector3::LEFT * MOVE_SPEED * timeStep);
+    if (input->GetKeyDown('D'))
+        cameraNode_->TranslateRelative(Vector3::RIGHT * MOVE_SPEED * timeStep);
+    
+    if (input->GetKeyDown(KEY_PAGEUP))
+    {
+        Camera* camera = cameraNode_->GetComponent<Camera>();
+        camera->SetZoom(camera->GetZoom() * 1.01f);
+    }
+
+    if (input->GetKeyDown(KEY_PAGEDOWN))
+    {
+        Camera* camera = cameraNode_->GetComponent<Camera>();
+        camera->SetZoom(camera->GetZoom() * 0.99f);
+    }
+}
+
+void Urho2DPhysicsRope::SubscribeToEvents()
+{
+    // Subscribe HandleUpdate() function for processing update events
+    SubscribeToEvent(E_UPDATE, HANDLER(Urho2DPhysicsRope, HandleUpdate));
+}
+
+void Urho2DPhysicsRope::HandleUpdate(StringHash eventType, VariantMap& eventData)
+{
+    using namespace Update;
+
+    // Take the frame time step, which is stored as a float
+    float timeStep = eventData[P_TIMESTEP].GetFloat();
+
+    // Move the camera, scale movement with time step
+    MoveCamera(timeStep);
+    
+    PhysicsWorld2D* physicsWorld = scene_->GetComponent<PhysicsWorld2D>();
+    physicsWorld->DrawDebugGeometry();
+}

Source/Samples/28_Urho2DPhysicsRope/Urho2DPhysicsRope.h

@@ -0,0 +1,68 @@
+//
+// Copyright (c) 2008-2014 the Urho3D project.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
+
+#pragma once
+
+#include "Sample.h"
+
+namespace Urho3D
+{
+    class Node;
+    class Scene;
+    class ConstraintRope2D;
+}
+
+/// Urho2D physics rope sample.
+/// This sample demonstrates:
+///     - Create revolute constraint
+///     - Create roop constraint
+///     - Displaying physics debug geometry
+class Urho2DPhysicsRope : public Sample
+{
+    OBJECT(Urho2DPhysicsRope);
+
+public:
+    /// Construct.
+    Urho2DPhysicsRope(Context* context);
+
+    /// Setup after engine initialization and before running the main loop.
+    virtual void Start();
+
+private:
+    /// Construct the scene content.
+    void CreateScene();
+    /// Construct an instruction text to the UI.
+    void CreateInstructions();
+    /// Set up a viewport for displaying the scene.
+    void SetupViewport();
+    /// Read input and moves the camera.
+    void MoveCamera(float timeStep);
+    /// Subscribe to application-wide logic update events.
+    void SubscribeToEvents();
+    /// Handle the logic update event.
+    void HandleUpdate(StringHash eventType, VariantMap& eventData);
+
+    /// Scene.
+    SharedPtr<Scene> scene_;
+    /// Camera scene node.
+    SharedPtr<Node> cameraNode_;
+};

Source/Samples/CMakeLists.txt

@@ -65,3 +65,4 @@ add_subdirectory (24_Urho2DSprite)
 add_subdirectory (25_Urho2DParticle)
 add_subdirectory (26_ConsoleInput)
 add_subdirectory (27_Urho2DPhysics)
+add_subdirectory (28_Urho2DPhysicsRope)