Exemplo n.º 1
0
static void
add_box(cpSpace *space)
{
	const cpFloat size = 10.0f;
	const cpFloat mass = 1.0f;
	
	cpVect verts[] = {
		cpv(-size,-size),
		cpv(-size, size),
		cpv( size, size),
		cpv( size,-size),
	};
	
	cpFloat radius = cpvlength(cpv(size, size));
	cpVect pos = rand_pos(radius);
	
	cpBody *body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForPoly(mass, 4, verts, cpvzero)));
	body->velocity_func = planetGravityVelocityFunc;
	cpBodySetPos(body, pos);

	// Set the box's velocity to put it into a circular orbit from its
	// starting position.
	cpFloat r = cpvlength(pos);
	cpFloat v = cpfsqrt(gravityStrength / r) / r;
	cpBodySetVel(body, cpvmult(cpvperp(pos), v));

	// Set the box's angular velocity to match its orbital period and
	// align its initial angle with its position.
	cpBodySetAngVel(body, v);
	cpBodySetAngle(body, cpfatan2(pos.y, pos.x));

	cpShape *shape = cpSpaceAddShape(space, cpPolyShapeNew(body, 4, verts, cpvzero));
	cpShapeSetElasticity(shape, 0.0f);
	cpShapeSetFriction(shape, 0.7f);
}
Exemplo n.º 2
0
void update_friction(int n)
{
	// kill lateral velocity
	const cpFloat max_lateral_impulse = 300;
	cpVect impulse = cpvmult(cpvneg(lateral_velocity(n)), cpBodyGetMass(tire[n]));
	//printf("%f\n", cpvlength(impulse));
	if(cpvlength(impulse) > max_lateral_impulse)
		impulse = cpvmult(impulse, max_lateral_impulse / cpvlength(impulse));
	cpBodyApplyImpulse(tire[n], impulse, cpvzero);


	// TODO - kill angular velocity?
	cpFloat inertia = cpBodyGetMoment(tire[n]);
	cpFloat av = cpBodyGetAngVel(tire[n]);
	if(av != 0)
		cpBodySetAngVel(tire[n], av / 1.2);
	
	// apply drag
	cpVect forward_normal = forward_velocity(n);
	cpFloat forward_speed = cpvlength(forward_normal);
	if(forward_speed < 1) {
		cpBodySetVel(tire[n], cpvzero);
	} else {
		forward_normal = cpvnormalize(forward_normal);
		cpFloat drag = -1 * forward_speed;
		cpBodyApplyImpulse(tire[n], cpvmult(forward_normal, drag), cpvzero);
	}
}
Exemplo n.º 3
0
void PhysicsBody::setDynamic(bool dynamic)
{
    if (dynamic != _dynamic)
    {
        _dynamic = dynamic;
        if (dynamic)
        {
            if (_world && _cpBody->CP_PRIVATE(space))
            {
                cpSpaceConvertBodyToDynamic(_world->_cpSpace, _cpBody, _mass, _moment);
                cpSpaceAddBody(_world->_cpSpace, _cpBody);
            }
            else
            {
                cpBodySetMass(_cpBody, _mass);
                cpBodySetMoment(_cpBody, _moment);
            }
        }
        else
        {
            if (_world && _cpBody->CP_PRIVATE(space))
            {
                cpSpaceRemoveBody(_world->_cpSpace, _cpBody);
                cpSpaceConvertBodyToStatic(_world->_cpSpace, _cpBody);
            }
            else
            {
                cpBodySetMass(_cpBody, PHYSICS_INFINITY);
                cpBodySetMoment(_cpBody, PHYSICS_INFINITY);
                cpBodySetVel(_cpBody, cpvzero);
                cpBodySetAngVel(_cpBody, 0.0);
            }
        }
    }
}
Exemplo n.º 4
0
__declspec( dllexport ) void push( const void * _in, int in_size, void * _out, int out_sz )
{
	int index;
	Variable *var;
	cpBody *body;
	cpShape *shape;

	index = PEEKINT(INPUT_MEMBLOCK,0);
	var = vhGetVariable(&mVariableHandler,index);
	switch (var->mType)
	{
	case VarTypeBody:
		body = (cpBody*)var->mPtr;
		
		cpBodySetAngle(body,degToRad(PEEKFLOAT(INPUT_MEMBLOCK,4)));
		cpBodySetPos(body,PEEKVECT(INPUT_MEMBLOCK,8));
		cpBodySetAngVel(body,degToRad(PEEKFLOAT(INPUT_MEMBLOCK,16)));
		cpBodySetVel(body,PEEKVECT(INPUT_MEMBLOCK,20));
		break;

	case VarTypeShape:
		shape = (cpShape*)var->mPtr;
		cpShapeSetFriction(shape,PEEKFLOAT(INPUT_MEMBLOCK,4));
		cpShapeSetElasticity(shape,PEEKFLOAT(INPUT_MEMBLOCK,8));
		cpShapeSetLayers(shape,PEEKUINT(INPUT_MEMBLOCK,12));
		cpShapeSetGroup(shape,PEEKUINT(INPUT_MEMBLOCK,16));
		break;
	}
}
Exemplo n.º 5
0
static void _update_kinematics()
{
    PhysicsInfo *info;
    cpVect pos;
    cpFloat ang;
    Scalar invdt;
    Entity ent;

    if (timing_dt <= FLT_EPSILON)
        return;
    invdt = 1 / timing_dt;

    entitypool_foreach(info, pool)
        if (info->type == PB_KINEMATIC)
        {
            ent = info->pool_elem.ent;

            /* move to transform */
            pos = cpv_of_vec2(transform_get_position(ent));
            ang = transform_get_rotation(ent);
            cpBodySetPos(info->body, pos);
            cpBodySetAngle(info->body, ang);
            info->last_dirty_count = transform_get_dirty_count(ent);

            /* update linear, angular velocities based on delta */
            cpBodySetVel(info->body,
                         cpvmult(cpvsub(pos, info->last_pos), invdt));
            cpBodySetAngVel(info->body, (ang - info->last_ang) * invdt);
            cpSpaceReindexShapesForBody(space, info->body);

            /* save current state for next computation */
            info->last_pos = pos;
            info->last_ang = ang;
        }
}
void NaiveRotationAlgorithm::stepSystem(SystemInfo *individual)
{
    
    MachineSystem *oldSystem = individual->system;
    individual->system = new MachineSystem(*oldSystem); // copy it to stop all the damn bouncing about
    delete oldSystem;
    
    cpBody *inputBody = individual->system->partAtPosition(individual->system->inputMachinePosition)->body;
    cpBody *outputBody = individual->system->partAtPosition(individual->system->outputMachinePosition)->body;
    cpSpace *systemSpace = individual->system->getSpace();

    
    cpConstraint *motor = cpSimpleMotorNew(cpSpaceGetStaticBody(systemSpace), inputBody, M_PI);
    cpSpaceAddConstraint(systemSpace, motor);
    cpConstraintSetMaxForce(motor, 50000);

    
    for (int i=0; i<simSteps; i++) {
        individual->inputValues[i] = (cpBodyGetAngle(inputBody));
        
        cpSpaceStep(systemSpace, 0.1);
        individual->outputValues[i] = (cpBodyGetAngle(outputBody));
    }
    cpSpaceRemoveConstraint(systemSpace, motor);
    cpBodySetAngVel(outputBody, 0);
    cpBodySetAngle(inputBody, 0);
}
Exemplo n.º 7
0
static cpSpace *
init(void)
{
	space = cpSpaceNew();
	cpSpaceSetGravity(space, cpv(0, -600));
	
	cpBody *body;
	cpShape *shape;
	
	// We create an infinite mass rogue body to attach the line segments too
	// This way we can control the rotation however we want.
	rogueBoxBody = cpBodyNew(INFINITY, INFINITY);
	cpBodySetAngVel(rogueBoxBody, 0.4f);
	
	// Set up the static box.
	cpVect a = cpv(-200, -200);
	cpVect b = cpv(-200,  200);
	cpVect c = cpv( 200,  200);
	cpVect d = cpv( 200, -200);
	
	shape = cpSpaceAddShape(space, cpSegmentShapeNew(rogueBoxBody, a, b, 0.0f));
	cpShapeSetElasticity(shape, 1.0f);
	cpShapeSetFriction(shape, 1.0f);
	cpShapeSetLayers(shape, NOT_GRABABLE_MASK);

	shape = cpSpaceAddShape(space, cpSegmentShapeNew(rogueBoxBody, b, c, 0.0f));
	cpShapeSetElasticity(shape, 1.0f);
	cpShapeSetFriction(shape, 1.0f);
	cpShapeSetLayers(shape, NOT_GRABABLE_MASK);

	shape = cpSpaceAddShape(space, cpSegmentShapeNew(rogueBoxBody, c, d, 0.0f));
	cpShapeSetElasticity(shape, 1.0f);
	cpShapeSetFriction(shape, 1.0f);
	cpShapeSetLayers(shape, NOT_GRABABLE_MASK);

	shape = cpSpaceAddShape(space, cpSegmentShapeNew(rogueBoxBody, d, a, 0.0f));
	cpShapeSetElasticity(shape, 1.0f);
	cpShapeSetFriction(shape, 1.0f);
	cpShapeSetLayers(shape, NOT_GRABABLE_MASK);
	
	cpFloat mass = 1;
	cpFloat width = 60;
	cpFloat height = 30;
	
	// Add the bricks.
	for(int i=0; i<3; i++){
		for(int j=0; j<7; j++){
			body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForBox(mass, width, height)));
			cpBodySetPos(body, cpv(i*60 - 150, j*30 - 150));
			
			shape = cpSpaceAddShape(space, cpBoxShapeNew(body, width, height));
			cpShapeSetElasticity(shape, 0.0f);
			cpShapeSetFriction(shape, 0.7f);
		}
	}
	
	return space;
}
Exemplo n.º 8
0
void PhysicsBody::setAngularVelocity(float velocity)
{
    if (!_dynamic)
    {
        CCLOG("physics warning: your can't set angular velocity for a static body.");
        return;
    }

    cpBodySetAngVel(_cpBody, velocity);
}
Exemplo n.º 9
0
void PhysicsBody::setAngularVelocity(float velocity)
{
    if (!_dynamic)
    {
        CCLOG("physics warning: your can't set angular velocity for a static body.");
        return;
    }
    
    cpBodySetAngVel(_info->getBody(), PhysicsHelper::float2cpfloat(velocity));
}
Exemplo n.º 10
0
void physics_set_freeze_rotation(Entity ent, bool freeze)
{
    PhysicsInfo *info = entitypool_get(pool, ent);
    error_assert(info);

    if (freeze)
    {
        cpBodySetAngVel(info->body, 0);
        cpBodySetMoment(info->body, SCALAR_INFINITY);
    }
    else
        _recalculate_moment(info);
}
Exemplo n.º 11
0
void
cpSpaceConvertBodyToStatic(cpSpace *space, cpBody *body)
{
	cpAssertHard(!cpBodyIsStatic(body), "Body is already static.");
	cpAssertHard(cpBodyIsRogue(body), "Remove the body from the space before calling this function.");
	cpAssertSpaceUnlocked(space);
	
	cpBodySetMass(body, INFINITY);
	cpBodySetMoment(body, INFINITY);
	
	cpBodySetVel(body, cpvzero);
	cpBodySetAngVel(body, 0.0f);
	
	body->node.idleTime = INFINITY;
	CP_BODY_FOREACH_SHAPE(body, shape){
		cpSpatialIndexRemove(space->activeShapes, shape, shape->hashid);
		cpSpatialIndexInsert(space->staticShapes, shape, shape->hashid);
	}
Exemplo n.º 12
0
static void
ClipPoly(cpSpace *space, cpShape *shape, cpVect n, cpFloat dist)
{
	cpBody *body = cpShapeGetBody(shape);
	
	int count = cpPolyShapeGetNumVerts(shape);
	int clippedCount = 0;
	
	cpVect *clipped = (cpVect *)alloca((count + 1)*sizeof(cpVect));
	
	for(int i=0, j=count-1; i<count; j=i, i++){
		cpVect a = cpBodyLocal2World(body, cpPolyShapeGetVert(shape, j));
		cpFloat a_dist = cpvdot(a, n) - dist;
		
		if(a_dist < 0.0){
			clipped[clippedCount] = a;
			clippedCount++;
		}
		
		cpVect b = cpBodyLocal2World(body, cpPolyShapeGetVert(shape, i));
		cpFloat b_dist = cpvdot(b, n) - dist;
		
		if(a_dist*b_dist < 0.0f){
			cpFloat t = cpfabs(a_dist)/(cpfabs(a_dist) + cpfabs(b_dist));
			
			clipped[clippedCount] = cpvlerp(a, b, t);
			clippedCount++;
		}
	}
	
	cpVect centroid = cpCentroidForPoly(clippedCount, clipped);
	cpFloat mass = cpAreaForPoly(clippedCount, clipped)*DENSITY;
	cpFloat moment = cpMomentForPoly(mass, clippedCount, clipped, cpvneg(centroid));
	
	cpBody *new_body = cpSpaceAddBody(space, cpBodyNew(mass, moment));
	cpBodySetPos(new_body, centroid);
	cpBodySetVel(new_body, cpBodyGetVelAtWorldPoint(body, centroid));
	cpBodySetAngVel(new_body, cpBodyGetAngVel(body));
	
	cpShape *new_shape = cpSpaceAddShape(space, cpPolyShapeNew(new_body, clippedCount, clipped, cpvneg(centroid)));
	// Copy whatever properties you have set on the original shape that are important
	cpShapeSetFriction(new_shape, cpShapeGetFriction(shape));
}
Exemplo n.º 13
0
static JSBool
body_setAngVel(JSContext* cx, uintN argc, jsval* vp)
{
  jsdouble angVel;
  if (!JS_ConvertArguments(cx, argc, JS_ARGV(cx, vp), "d", &angVel)) {
      /* Throw a JavaScript exception. */
      JS_ReportError(cx, "body_setAngVel: couldn't parse out angVel");
      return JS_FALSE;
  }

  JSObject* bodyObj = JS_THIS_OBJECT(cx, vp);

  cpBody* body = (cpBody*)JS_GetPrivate(cx, bodyObj);
  cpBodySetAngVel(body, angVel);

  jsval rVal = JSVAL_VOID;
  JS_SET_RVAL(cx, vp, rVal);
  return JS_TRUE;
}
Exemplo n.º 14
0
static cpSpace *
init(void)
{
	// Create a rouge body to control the planet manually.
	planetBody = cpBodyNew(INFINITY, INFINITY);
	cpBodySetAngVel(planetBody, 0.2f);
	
	cpSpace *space = cpSpaceNew();
	cpSpaceSetIterations(space, 20);
	
	for(int i=0; i<30; i++)
		add_box(space);
	
	cpShape *shape = cpSpaceAddShape(space, cpCircleShapeNew(planetBody, 70.0f, cpvzero));
	cpShapeSetElasticity(shape, 1.0f);
	cpShapeSetFriction(shape, 1.0f);
	cpShapeSetLayers(shape, NOT_GRABABLE_MASK);
	
	return space;
}
Exemplo n.º 15
0
void PhysicsBody::setDynamic(bool dynamic)
{
    if (dynamic != _dynamic)
    {
        _dynamic = dynamic;
        if (dynamic)
        {
            cpBodySetMass(_info->getBody(), _mass);
            cpBodySetMoment(_info->getBody(), _moment);
            
            if (_world != nullptr)
            {
                // reset the gravity enable
                if (isGravityEnabled())
                {
                    _gravityEnabled = false;
                    setGravityEnable(true);
                }
                
                cpSpaceAddBody(_world->_info->getSpace(), _info->getBody());
            }
        }
        else
        {
            if (_world != nullptr)
            {
                cpSpaceRemoveBody(_world->_info->getSpace(), _info->getBody());
            }
            
            // avoid incorrect collion simulation.
            cpBodySetMass(_info->getBody(), PHYSICS_INFINITY);
            cpBodySetMoment(_info->getBody(), PHYSICS_INFINITY);
            cpBodySetVel(_info->getBody(), cpvzero);
            cpBodySetAngVel(_info->getBody(), 0.0f);
            resetForces();
        }
        
    }
}
Exemplo n.º 16
0
void physics_update_all()
{
    PhysicsInfo *info;
    Entity ent;

    entitypool_remove_destroyed(pool, physics_remove);

    entitymap_clear(debug_draw_map);

    /* simulate */
    if (!timing_get_paused())
    {
        _update_kinematics();
        _step();
    }

    /* synchronize transform <-> physics */
    entitypool_foreach(info, pool)
    {
        ent = info->pool_elem.ent;

        /* if transform is dirtier, move to it, else overwrite it */
        if (transform_get_dirty_count(ent) != info->last_dirty_count)
        {
            cpBodySetVel(info->body, cpvzero);
            cpBodySetAngVel(info->body, 0.0f);
            cpBodySetPos(info->body, cpv_of_vec2(transform_get_position(ent)));
            cpBodySetAngle(info->body, transform_get_rotation(ent));
            cpSpaceReindexShapesForBody(space, info->body);
        }
        else if (info->type == PB_DYNAMIC)
        {
            transform_set_position(ent, vec2_of_cpv(cpBodyGetPos(info->body)));
            transform_set_rotation(ent, cpBodyGetAngle(info->body));
        }

        info->last_dirty_count = transform_get_dirty_count(ent);
    }
Exemplo n.º 17
0
void cBody::AngVel( const cpFloat& rotVel ) {
	cpBodySetAngVel( mBody, rotVel );
}
Exemplo n.º 18
0
void Body::setAngVel(cpFloat value)
{
		cpBodySetAngVel(body,value);
}
Exemplo n.º 19
0
void PhysicsBody::setAngularVelocity(float velocity)
{
    cpBodySetAngVel(_info->body, PhysicsHelper::float2cpfloat(velocity));
}
Exemplo n.º 20
0
void physics_set_angular_velocity(Entity ent, Scalar ang_vel)
{
    PhysicsInfo *info = entitypool_get(pool, ent);
    error_assert(info);
    cpBodySetAngVel(info->body, ang_vel);
}