axmol/tests/cpp-tests/Classes/Box2DTestBed/Test.cpp

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/*
* Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include "tests/test.h"
#include "tests/settings.h"
#include "extensions/cocos-ext.h"
#include <stdio.h>
void DestructionListener::SayGoodbye(b2Joint * joint)
{
if (test->m_mouseJoint == joint)
{
test->m_mouseJoint = NULL;
}
else
{
test->JointDestroyed(joint);
}
}
Test::Test()
{
b2Vec2 gravity;
gravity.Set(0.0f, -10.0f);
m_world = new b2World(gravity);
m_bomb = NULL;
m_textLine = 30;
m_textIncrement = 13;
m_mouseJoint = NULL;
m_pointCount = 0;
m_destructionListener.test = this;
m_world->SetDestructionListener(&m_destructionListener);
m_world->SetContactListener(this);
m_world->SetDebugDraw(&g_debugDraw);
m_bombSpawning = false;
m_stepCount = 0;
b2BodyDef bodyDef;
m_groundBody = m_world->CreateBody(&bodyDef);
memset(&m_maxProfile, 0, sizeof(b2Profile));
memset(&m_totalProfile, 0, sizeof(b2Profile));
}
Test::~Test()
{
// By deleting the world, we delete the bomb, mouse joint, etc.
delete m_world;
m_world = NULL;
}
void Test::PreSolve(b2Contact * contact, const b2Manifold * oldManifold)
{
const b2Manifold* manifold = contact->GetManifold();
if (manifold->pointCount == 0)
{
return;
}
b2Fixture* fixtureA = contact->GetFixtureA();
b2Fixture* fixtureB = contact->GetFixtureB();
b2PointState state1[b2_maxManifoldPoints], state2[b2_maxManifoldPoints];
b2GetPointStates(state1, state2, oldManifold, manifold);
b2WorldManifold worldManifold;
contact->GetWorldManifold(&worldManifold);
for (int32 i = 0; i < manifold->pointCount && m_pointCount < k_maxContactPoints; ++i)
{
ContactPoint* cp = m_points + m_pointCount;
cp->fixtureA = fixtureA;
cp->fixtureB = fixtureB;
cp->position = worldManifold.points[i];
cp->normal = worldManifold.normal;
cp->state = state2[i];
cp->normalImpulse = manifold->points[i].normalImpulse;
cp->tangentImpulse = manifold->points[i].tangentImpulse;
cp->separation = worldManifold.separations[i];
++m_pointCount;
}
}
void Test::DrawTitle(const char* string)
{
g_debugDraw.DrawString(5, 5, string);
m_textLine = int32(26.0f);
}
class QueryCallback : public b2QueryCallback
{
public:
QueryCallback(const b2Vec2& point)
{
m_point = point;
m_fixture = NULL;
}
bool ReportFixture(b2Fixture* fixture) override
{
b2Body* body = fixture->GetBody();
if (body->GetType() == b2_dynamicBody)
{
bool inside = fixture->TestPoint(m_point);
if (inside)
{
m_fixture = fixture;
// We are done, terminate the query.
return false;
}
}
// Continue the query.
return true;
}
b2Vec2 m_point;
b2Fixture* m_fixture;
};
bool Test::MouseDown(const b2Vec2 & p)
{
m_mouseWorld = p;
if (m_mouseJoint != NULL)
{
return false;
}
// Make a small box.
b2AABB aabb;
b2Vec2 d;
d.Set(0.001f, 0.001f);
aabb.lowerBound = p - d;
aabb.upperBound = p + d;
// Query the world for overlapping shapes.
QueryCallback callback(p);
m_world->QueryAABB(&callback, aabb);
if (callback.m_fixture)
{
float frequencyHz = 5.0f;
float dampingRatio = 0.7f;
b2Body* body = callback.m_fixture->GetBody();
b2MouseJointDef jd;
jd.bodyA = m_groundBody;
jd.bodyB = body;
jd.target = p;
jd.maxForce = 1000.0f * body->GetMass();
b2LinearStiffness(jd.stiffness, jd.damping, frequencyHz, dampingRatio, jd.bodyA, jd.bodyB);
m_mouseJoint = (b2MouseJoint*)m_world->CreateJoint(&jd);
body->SetAwake(true);
return true;
}
return false;
}
void Test::SpawnBomb(const b2Vec2 & worldPt)
{
m_bombSpawnPoint = worldPt;
m_bombSpawning = true;
}
void Test::CompleteBombSpawn(const b2Vec2 & p)
{
if (m_bombSpawning == false)
{
return;
}
const float multiplier = 30.0f;
b2Vec2 vel = m_bombSpawnPoint - p;
vel *= multiplier;
LaunchBomb(m_bombSpawnPoint, vel);
m_bombSpawning = false;
}
void Test::ShiftMouseDown(const b2Vec2 & p)
{
m_mouseWorld = p;
if (m_mouseJoint != NULL)
{
return;
}
SpawnBomb(p);
}
void Test::MouseUp(const b2Vec2 & p)
{
if (m_mouseJoint)
{
m_world->DestroyJoint(m_mouseJoint);
m_mouseJoint = NULL;
}
if (m_bombSpawning)
{
CompleteBombSpawn(p);
}
}
void Test::MouseMove(const b2Vec2 & p)
{
m_mouseWorld = p;
if (m_mouseJoint)
{
m_mouseJoint->SetTarget(p);
}
}
void Test::LaunchBomb()
{
b2Vec2 p(RandomFloat(-15.0f, 15.0f), 30.0f);
b2Vec2 v = -5.0f * p;
LaunchBomb(p, v);
}
void Test::LaunchBomb(const b2Vec2 & position, const b2Vec2 & velocity)
{
if (m_bomb)
{
m_world->DestroyBody(m_bomb);
m_bomb = NULL;
}
b2BodyDef bd;
bd.type = b2_dynamicBody;
bd.position = position;
bd.bullet = true;
m_bomb = m_world->CreateBody(&bd);
m_bomb->SetLinearVelocity(velocity);
b2CircleShape circle;
circle.m_radius = 0.3f;
b2FixtureDef fd;
fd.shape = &circle;
fd.density = 20.0f;
fd.restitution = 0.0f;
b2Vec2 minV = position - b2Vec2(0.3f, 0.3f);
b2Vec2 maxV = position + b2Vec2(0.3f, 0.3f);
b2AABB aabb;
aabb.lowerBound = minV;
aabb.upperBound = maxV;
m_bomb->CreateFixture(&fd);
}
void Test::Step(Settings& settings)
{
float timeStep = settings.m_hertz > 0.0f ? 1.0f / settings.m_hertz : float(0.0f);
if (settings.m_pause)
{
if (settings.m_singleStep)
{
settings.m_singleStep = 0;
}
else
{
timeStep = 0.0f;
}
g_debugDraw.DrawString(5, m_textLine, "****PAUSED****");
m_textLine += m_textIncrement;
}
uint32 flags = 0;
flags += settings.m_drawShapes * b2Draw::e_shapeBit;
flags += settings.m_drawJoints * b2Draw::e_jointBit;
flags += settings.m_drawAABBs * b2Draw::e_aabbBit;
flags += settings.m_drawCOMs * b2Draw::e_centerOfMassBit;
g_debugDraw.SetFlags(flags);
m_world->SetAllowSleeping(settings.m_enableSleep);
m_world->SetWarmStarting(settings.m_enableWarmStarting);
m_world->SetContinuousPhysics(settings.m_enableContinuous);
m_world->SetSubStepping(settings.m_enableSubStepping);
m_pointCount = 0;
m_world->Step(timeStep, settings.m_velocityIterations, settings.m_positionIterations);
m_world->DebugDraw();
if (timeStep > 0.0f)
{
++m_stepCount;
}
if (settings.m_drawStats)
{
int32 bodyCount = m_world->GetBodyCount();
int32 contactCount = m_world->GetContactCount();
int32 jointCount = m_world->GetJointCount();
g_debugDraw.DrawString(5, m_textLine, "bodies/contacts/joints = %d/%d/%d", bodyCount, contactCount, jointCount);
m_textLine += m_textIncrement;
int32 proxyCount = m_world->GetProxyCount();
int32 height = m_world->GetTreeHeight();
int32 balance = m_world->GetTreeBalance();
float quality = m_world->GetTreeQuality();
g_debugDraw.DrawString(5, m_textLine, "proxies/height/balance/quality = %d/%d/%d/%g", proxyCount, height, balance, quality);
m_textLine += m_textIncrement;
}
// Track maximum profile times
{
const b2Profile& p = m_world->GetProfile();
m_maxProfile.step = b2Max(m_maxProfile.step, p.step);
m_maxProfile.collide = b2Max(m_maxProfile.collide, p.collide);
m_maxProfile.solve = b2Max(m_maxProfile.solve, p.solve);
m_maxProfile.solveInit = b2Max(m_maxProfile.solveInit, p.solveInit);
m_maxProfile.solveVelocity = b2Max(m_maxProfile.solveVelocity, p.solveVelocity);
m_maxProfile.solvePosition = b2Max(m_maxProfile.solvePosition, p.solvePosition);
m_maxProfile.solveTOI = b2Max(m_maxProfile.solveTOI, p.solveTOI);
m_maxProfile.broadphase = b2Max(m_maxProfile.broadphase, p.broadphase);
m_totalProfile.step += p.step;
m_totalProfile.collide += p.collide;
m_totalProfile.solve += p.solve;
m_totalProfile.solveInit += p.solveInit;
m_totalProfile.solveVelocity += p.solveVelocity;
m_totalProfile.solvePosition += p.solvePosition;
m_totalProfile.solveTOI += p.solveTOI;
m_totalProfile.broadphase += p.broadphase;
}
if (settings.m_drawProfile)
{
const b2Profile& p = m_world->GetProfile();
b2Profile aveProfile;
memset(&aveProfile, 0, sizeof(b2Profile));
if (m_stepCount > 0)
{
float scale = 1.0f / m_stepCount;
aveProfile.step = scale * m_totalProfile.step;
aveProfile.collide = scale * m_totalProfile.collide;
aveProfile.solve = scale * m_totalProfile.solve;
aveProfile.solveInit = scale * m_totalProfile.solveInit;
aveProfile.solveVelocity = scale * m_totalProfile.solveVelocity;
aveProfile.solvePosition = scale * m_totalProfile.solvePosition;
aveProfile.solveTOI = scale * m_totalProfile.solveTOI;
aveProfile.broadphase = scale * m_totalProfile.broadphase;
}
g_debugDraw.DrawString(5, m_textLine, "step [ave] (max) = %5.2f [%6.2f] (%6.2f)", p.step, aveProfile.step, m_maxProfile.step);
m_textLine += m_textIncrement;
g_debugDraw.DrawString(5, m_textLine, "collide [ave] (max) = %5.2f [%6.2f] (%6.2f)", p.collide, aveProfile.collide, m_maxProfile.collide);
m_textLine += m_textIncrement;
g_debugDraw.DrawString(5, m_textLine, "solve [ave] (max) = %5.2f [%6.2f] (%6.2f)", p.solve, aveProfile.solve, m_maxProfile.solve);
m_textLine += m_textIncrement;
g_debugDraw.DrawString(5, m_textLine, "solve init [ave] (max) = %5.2f [%6.2f] (%6.2f)", p.solveInit, aveProfile.solveInit, m_maxProfile.solveInit);
m_textLine += m_textIncrement;
g_debugDraw.DrawString(5, m_textLine, "solve velocity [ave] (max) = %5.2f [%6.2f] (%6.2f)", p.solveVelocity, aveProfile.solveVelocity, m_maxProfile.solveVelocity);
m_textLine += m_textIncrement;
g_debugDraw.DrawString(5, m_textLine, "solve position [ave] (max) = %5.2f [%6.2f] (%6.2f)", p.solvePosition, aveProfile.solvePosition, m_maxProfile.solvePosition);
m_textLine += m_textIncrement;
g_debugDraw.DrawString(5, m_textLine, "solveTOI [ave] (max) = %5.2f [%6.2f] (%6.2f)", p.solveTOI, aveProfile.solveTOI, m_maxProfile.solveTOI);
m_textLine += m_textIncrement;
g_debugDraw.DrawString(5, m_textLine, "broad-phase [ave] (max) = %5.2f [%6.2f] (%6.2f)", p.broadphase, aveProfile.broadphase, m_maxProfile.broadphase);
m_textLine += m_textIncrement;
}
if (m_bombSpawning)
{
b2Color c;
c.Set(0.0f, 0.0f, 1.0f);
g_debugDraw.DrawPoint(m_bombSpawnPoint, 4.0f, c);
c.Set(0.8f, 0.8f, 0.8f);
g_debugDraw.DrawSegment(m_mouseWorld, m_bombSpawnPoint, c);
}
if (settings.m_drawContactPoints)
{
const float k_impulseScale = 0.1f;
const float k_axisScale = 0.3f;
for (int32 i = 0; i < m_pointCount; ++i)
{
ContactPoint* point = m_points + i;
if (point->state == b2_addState)
{
// Add
g_debugDraw.DrawPoint(point->position, 10.0f, b2Color(0.3f, 0.95f, 0.3f));
}
else if (point->state == b2_persistState)
{
// Persist
g_debugDraw.DrawPoint(point->position, 5.0f, b2Color(0.3f, 0.3f, 0.95f));
}
if (settings.m_drawContactNormals == 1)
{
b2Vec2 p1 = point->position;
b2Vec2 p2 = p1 + k_axisScale * point->normal;
g_debugDraw.DrawSegment(p1, p2, b2Color(0.9f, 0.9f, 0.9f));
}
else if (settings.m_drawContactImpulse == 1)
{
b2Vec2 p1 = point->position;
b2Vec2 p2 = p1 + k_impulseScale * point->normalImpulse * point->normal;
g_debugDraw.DrawSegment(p1, p2, b2Color(0.9f, 0.9f, 0.3f));
}
if (settings.m_drawFrictionImpulse == 1)
{
b2Vec2 tangent = b2Cross(point->normal, 1.0f);
b2Vec2 p1 = point->position;
b2Vec2 p2 = p1 + k_impulseScale * point->tangentImpulse * tangent;
g_debugDraw.DrawSegment(p1, p2, b2Color(0.9f, 0.9f, 0.3f));
}
}
}
}
void Test::ShiftOrigin(const b2Vec2 & newOrigin)
{
m_world->ShiftOrigin(newOrigin);
}