Adding Playground App (#105)

This revision adds an example app to demonstrate the PhysicsAnimation API use case.

Author: doyubkim

CMakeLists.txt

@@ -81,6 +81,7 @@ add_subdirectory(src/examples/particles2obj)
 add_subdirectory(src/examples/particles2xml)
 add_subdirectory(src/examples/smoke_sim)
 add_subdirectory(src/examples/sph_sim)
+add_subdirectory(src/examples/playground)
 
 add_subdirectory(external/pybind11)
 if (BUILD_FROM_PIP)

src/examples/playground/CMakeLists.txt

@@ -0,0 +1,41 @@
+#
+# Copyright (c) 2017 Doyub Kim
+#
+# I am making my contributions/submissions to this project solely in my personal
+# capacity and am not conveying any rights to any intellectual property of any
+# third parties.
+#
+
+# Target name
+set(target sandbox)
+
+# Includes
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+
+# Sources
+file(GLOB sources
+        ${CMAKE_CURRENT_SOURCE_DIR}/*.cpp)
+
+# Build executable
+add_executable(${target}
+        ${sources})
+
+# Project options
+set_target_properties(${target}
+        PROPERTIES
+        ${DEFAULT_PROJECT_OPTIONS})
+
+# Compile options
+target_compile_options(${target}
+        PRIVATE
+
+        PUBLIC
+        ${DEFAULT_COMPILE_OPTIONS}
+
+        INTERFACE)
+
+# Link libraries
+target_link_libraries(${target}
+        PRIVATE
+        ${DEFAULT_LINKER_OPTIONS}
+        jet)

src/examples/playground/main.cpp

@@ -0,0 +1,38 @@
+// Copyright (c) 2017 Doyub Kim
+//
+// I am making my contributions/submissions to this project solely in my
+// personal capacity and am not conveying any rights to any intellectual
+// property of any third parties.
+
+#include "my_physics_solver.h"
+
+#include <fstream>
+
+using namespace jet;
+
+void runSimulation(MyPhysicsSolver& solver, double frameIntervalInSeconds,
+                   int numberOfFrames) {
+    for (Frame frame(0, frameIntervalInSeconds); frame.index < numberOfFrames;
+         ++frame) {
+        printf("Updating frame %u\n", frame.index);
+        solver.update(frame);
+    }
+}
+
+int main() {
+    // Set up output log file
+    std::ofstream logFile("playground.log");
+    if (logFile) {
+        Logging::setAllStream(&logFile);
+    }
+
+    // Set up simulation
+    MyPhysicsSolver solver;
+    double frameIntervalInSeconds = 0.01;
+    unsigned int numberOfFrames = 300;
+
+    // Run the sim
+    runSimulation(solver, frameIntervalInSeconds, numberOfFrames);
+
+    return 0;
+}

src/examples/playground/my_physics_solver.cpp

@@ -0,0 +1,26 @@
+// Copyright (c) 2017 Doyub Kim
+//
+// I am making my contributions/submissions to this project solely in my
+// personal capacity and am not conveying any rights to any intellectual
+// property of any third parties.
+
+#include "my_physics_solver.h"
+
+using namespace jet;
+
+MyPhysicsSolver::MyPhysicsSolver() {}
+
+MyPhysicsSolver::~MyPhysicsSolver() {}
+
+void MyPhysicsSolver::onInitialize() {
+    // This function is called at frame 0
+    // TODO: Perform initialization here
+}
+
+void MyPhysicsSolver::onAdvanceTimeStep(double timeIntervalInSeconds) {
+    // This function is called at frames greater than 0
+
+    (void)timeIntervalInSeconds;
+
+    // TODO: Perform simulation update here
+}

src/examples/playground/my_physics_solver.h

@@ -0,0 +1,23 @@
+// Copyright (c) 2017 Doyub Kim
+//
+// I am making my contributions/submissions to this project solely in my
+// personal capacity and am not conveying any rights to any intellectual
+// property of any third parties.
+
+#ifndef MY_PHYSICS_SOLVER_H_
+#define MY_PHYSICS_SOLVER_H_
+
+#include <jet/jet.h>
+
+class MyPhysicsSolver : public jet::PhysicsAnimation {
+ public:
+    MyPhysicsSolver();
+    virtual ~MyPhysicsSolver();
+
+ protected:
+    void onInitialize() override;
+
+    void onAdvanceTimeStep(double timeIntervalInSeconds) override;
+};
+
+#endif  // MY_PHYSICS_SOLVER_H_