diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/Box2D_v2.2.1/Benchmark.cpp | 122 | ||||
| -rw-r--r-- | tests/Box2D_v2.2.1/Makefile | 63 |
2 files changed, 185 insertions, 0 deletions
diff --git a/tests/Box2D_v2.2.1/Benchmark.cpp b/tests/Box2D_v2.2.1/Benchmark.cpp new file mode 100644 index 00000000..914c13a0 --- /dev/null +++ b/tests/Box2D_v2.2.1/Benchmark.cpp @@ -0,0 +1,122 @@ + + +// +// Based on joelgwebber's Box2D benchmarks, +// https://github.com/joelgwebber/bench2d/blob/master/c/Bench2d.cpp +// + + +// Settings ===================== +// Turn this on to include the y-position of the top box in the output. +#define DEBUG 0 + +#define WARMUP 64 +#define FRAMES 256 + +typedef struct { + float mean; + float stddev; +} result_t; +// ============================== + + + +#include <cstdio> +#include <time.h> +#include <math.h> + +#include "Box2D/Box2D.h" +#include "Bench2d.h" + +using namespace std; + +const int e_count = 40; + +result_t measure(clock_t times[FRAMES]) { + float values[FRAMES]; + result_t r; + + float total = 0; + for (int i = 0; i < FRAMES; ++i) { + values[i] = (float)times[i] / CLOCKS_PER_SEC * 1000; + total += values[i]; + } + r.mean = total / FRAMES; + + float variance = 0; + for (int i = 0; i < FRAMES; ++i) { + float diff = values[i] - r.mean; + variance += diff * diff; + } + r.stddev = sqrt(variance / FRAMES); + + return r; +} + +result_t bench() { + // Define the gravity vector. + b2Vec2 gravity(0.0f, -10.0f); + + // Construct a world object, which will hold and simulate the rigid bodies. + b2World world(gravity); + world.SetAllowSleeping(false); + + { + b2BodyDef bd; + b2Body* ground = world.CreateBody(&bd); + + b2EdgeShape shape; + shape.Set(b2Vec2(-40.0f, 0.0f), b2Vec2(40.0f, 0.0f)); + ground->CreateFixture(&shape, 0.0f); + } + + b2Body* topBody; + + { + float32 a = 0.5f; + b2PolygonShape shape; + shape.SetAsBox(a, a); + + b2Vec2 x(-7.0f, 0.75f); + b2Vec2 y; + b2Vec2 deltaX(0.5625f, 1); + b2Vec2 deltaY(1.125f, 0.0f); + + for (int32 i = 0; i < e_count; ++i) { + y = x; + + for (int32 j = i; j < e_count; ++j) { + b2BodyDef bd; + bd.type = b2_dynamicBody; + bd.position = y; + b2Body* body = world.CreateBody(&bd); + body->CreateFixture(&shape, 5.0f); + + topBody = body; + + y += deltaY; + } + + x += deltaX; + } + } + + for (int32 i = 0; i < WARMUP; ++i) { + world.Step(1.0f/60.0f, 3, 3); + } + + clock_t times[FRAMES]; + for (int32 i = 0; i < FRAMES; ++i) { + clock_t start = clock(); + world.Step(1.0f/60.0f, 3, 3); + clock_t end = clock(); + times[i] = end - start; +#if DEBUG + printf("%f :: ", topBody->GetPosition().y); + printf("%f\n", (float32)(end - start) / CLOCKS_PER_SEC * 1000); +#endif + } + + return measure(times); +} + diff --git a/tests/Box2D_v2.2.1/Makefile b/tests/Box2D_v2.2.1/Makefile new file mode 100644 index 00000000..10f47ddb --- /dev/null +++ b/tests/Box2D_v2.2.1/Makefile @@ -0,0 +1,63 @@ +# Makefile for generating a Box2D library using Emscripten. + +O = Box2D_v2.2.1/Box2D +OBJECTS = \ + $(O)/Collision/b2BroadPhase.o \ + $(O)/Collision/b2CollideCircle.o \ + $(O)/Collision/b2CollideEdge.o \ + $(O)/Collision/b2CollidePolygon.o \ + $(O)/Collision/b2Collision.o \ + $(O)/Collision/b2Distance.o \ + $(O)/Collision/b2DynamicTree.o \ + $(O)/Collision/b2TimeOfImpact.o \ + $(O)/Collision/Shapes/b2ChainShape.o \ + $(O)/Collision/Shapes/b2CircleShape.o \ + $(O)/Collision/Shapes/b2EdgeShape.o \ + $(O)/Collision/Shapes/b2PolygonShape.o \ + $(O)/Common/b2BlockAllocator.o \ + $(O)/Common/b2Draw.o \ + $(O)/Common/b2Math.o \ + $(O)/Common/b2Settings.o \ + $(O)/Common/b2StackAllocator.o \ + $(O)/Common/b2Timer.o \ + $(O)/Dynamics/b2Body.o \ + $(O)/Dynamics/b2ContactManager.o \ + $(O)/Dynamics/b2Fixture.o \ + $(O)/Dynamics/b2Island.o \ + $(O)/Dynamics/b2World.o \ + $(O)/Dynamics/b2WorldCallbacks.o \ + $(O)/Dynamics/Contacts/b2ChainAndCircleContact.o \ + $(O)/Dynamics/Contacts/b2ChainAndPolygonContact.o \ + $(O)/Dynamics/Contacts/b2CircleContact.o \ + $(O)/Dynamics/Contacts/b2Contact.o \ + $(O)/Dynamics/Contacts/b2ContactSolver.o \ + $(O)/Dynamics/Contacts/b2EdgeAndCircleContact.o \ + $(O)/Dynamics/Contacts/b2EdgeAndPolygonContact.o \ + $(O)/Dynamics/Contacts/b2PolygonAndCircleContact.o \ + $(O)/Dynamics/Contacts/b2PolygonContact.o \ + $(O)/Dynamics/Joints/b2DistanceJoint.o \ + $(O)/Dynamics/Joints/b2FrictionJoint.o \ + $(O)/Dynamics/Joints/b2GearJoint.o \ + $(O)/Dynamics/Joints/b2Joint.o \ + $(O)/Dynamics/Joints/b2MouseJoint.o \ + $(O)/Dynamics/Joints/b2PrismaticJoint.o \ + $(O)/Dynamics/Joints/b2PulleyJoint.o \ + $(O)/Dynamics/Joints/b2RevoluteJoint.o \ + $(O)/Dynamics/Joints/b2RopeJoint.o \ + $(O)/Dynamics/Joints/b2WeldJoint.o \ + $(O)/Dynamics/Joints/b2WheelJoint.o \ + $(O)/Rope/b2Rope.o + +all: box2d.o + +OPTS = -O2 + +%.o: %.cpp + $(CXX) -IBox2D_v2.2.1 $< -o $@ $(OPTS) + +box2d.o: $(OBJECTS) + $(CXX) -o $@ $(OBJECTS) $(OPTS) + +clean: + rm box2d.o + |