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C++ randf函数代码示例

本文整理汇总了C++中randf函数的典型用法代码示例。如果您正苦于以下问题:C++ randf函数的具体用法?C++ randf怎么用?C++ randf使用的例子?那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。


在下文中一共展示了randf函数的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: display

static void display(void)
{
	glClearColor(randf(), randf(), randf(), 1.0f);
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glutSwapBuffers();
	glutPostRedisplay();
}
开发者ID:rmuenste,项目名称:opengl-sdl,代码行数:7,代码来源:test.c

示例2: randMat

glm::mat4 randMat()
{
	float theta = randf(-PI / 2, PI / 2), phi = randf(0.0f, 2 * PI);
	glm::mat4 rotation = glm::rotate(glm::mat4(1.0), phi, glm::vec3(1.0, 0.0, 0.0));
	rotation = glm::rotate(rotation,     theta, glm::vec3(0.0, 1.0, 0.0));
	return rotation;
}
开发者ID:davidwalton3142,项目名称:fire-framework,代码行数:7,代码来源:LightDemo.cpp

示例3: randf

void Server::broadcastFaultyData(const char* data, unsigned int size) {
	packetNumber++;
	// lose messages every so often
	if (randf() * 100 < m_packetlossPercentage)
		return;

	// delay messages every so often
	if (randf() * 100 < m_delayPercentage) {
		DelayedBroadcast* b = new DelayedBroadcast;
		b->stream.Write((RakNet::MessageID)GameMessages::ID_ENTITY_LIST);
		b->stream.Write(size);
		b->stream.Write(packetNumber);
		b->stream.Write(data, size);
		float delay = randf() * m_delayRange;
		b->delayMicroseconds = (double)(delay * 1000.0 * 1000.0);
		m_delayedMessages.push_back(b);
	}
	else {
		// just send the stream
		RakNet::BitStream stream;
		stream.Write((RakNet::MessageID)GameMessages::ID_ENTITY_LIST); 
		stream.Write(size);
		stream.Write(packetNumber);
		stream.Write(data, size);
		sendBitStream(&stream);
	}
}
开发者ID:BenjaminMatthewMoore,项目名称:NetworkAssignment,代码行数:27,代码来源:Server.cpp

示例4: float

void FlowShower::update()
{
	scale += (scaleb - scale) * 0.1;
	if (game->isMiddleDown() && !painting)
	{
		viewX = pressViewX + (pressX - float(game->getMouseX())
				/ float(game->getResY())) / scale;
		viewY = pressViewY - (pressY - float(game->getMouseY())
				/ float(game->getResY())) / scale;
	}
	inkNew+=0.1f;
	while(inkNew>=1.0f)
	{
		inkNew-=1.0f;
		inkRed=inkRedNew;
		inkGreen=inkGreenNew;
		inkBlue=inkBlueNew;
		inkRedNew=randf(1.0f);
		inkGreenNew=randf(1.0f);
		inkBlueNew=randf(1.0f);
	}
	clock_t curentClock = clock();
	/*if (lastClock != 0 || dt != 0)
	 dt = float(curentClock - lastClock) / 1000.0f;*/
	lastClock = curentClock;

}
开发者ID:kpws,项目名称:Flower,代码行数:27,代码来源:FlowShower.cpp

示例5: srand

void Tile::Init(float roughness) {
  // Zufallsgenerator initialisieren
  srand(static_cast<unsigned int>(time(0)));

  // x- und z-Koordinaten berechnen.
  // Das Wurzel-Tile ersteckt sich entlang der x- und z-Achse immer im Bereich
  // [-2.5, 2.5]
  int i = 0;
  for (int y = 0; y < size_; ++y) {
    for (int x = 0; x < size_; ++x, ++i) {
      vertices_[i].x = x * 5.0f / (size_ - 1) - 2.5f;
      vertices_[i].z = y * 5.0f / (size_ - 1) - 2.5f;
    }
  }

  // Ecken mit Zufallshöhenwerten initialisieren
  int block_size = size_ - 1;
  vertices_[I(0, 0)].y = randf();
  vertices_[I(0, block_size)].y = randf();
  vertices_[I(block_size, 0)].y = randf();
  vertices_[I(block_size, block_size)].y = randf();

  // Verfeinerungsschritte durchführen bis sämtliche Werte berechnet sind
  while (block_size > 1) {
    Refine(block_size, roughness);
    block_size = block_size / 2;
  }
}
开发者ID:reima,项目名称:sep3d,代码行数:28,代码来源:Tile.cpp

示例6: RandFloat

static inline float RandFloat(const float min, const float max) {
	// we work with large floats here (1e22 etc.) we cannot blend them without overflows, so do it a bit differently
	if (rand() & 1) {
		return max * randf();
	}
	return min * randf();
}
开发者ID:DoctorEmmettBrown,项目名称:spring,代码行数:7,代码来源:testPrintf.cpp

示例7: metro

void metro(double *m, double *T) /*Metropolitan algorithm*/
{
 	int i, x, y, xdown, xup, ydown, yup, sum;
 	double deltaE;
 
 	for (i = 0; i < LX*LY; i++)
 	{
  		x = randf()*LX;	/* Choose a random coordinate in the lattice */
  		y = randf()*LY;
  
  		xup = (x + 1)%LX;		/*determine neighbor sites, with periodic BCs */
  		xdown = (x + LX - 1)%LX;
  		yup = (y + 1)%LY;
  		ydown = (y + LY - 1)%LY;
 
  /*compute the sum of the spins of sites neighboring coordinate*/
  		sum = spin[xdown][y] + spin[xup][y] + spin[x][yup] + spin[x][ydown];
  
  /*compute change in energy if spin is flipped at coordinate*/
  		deltaE = 2.0*J*spin[x][y]*sum/(*T);
  		if (randf() < exp(-deltaE)) /* decide if flip is accepted*/
  		{
   			*m -= 2.0*spin[x][y]/(LX*LY); /*flip spin and compute m*/
   			spin[x][y] *= -1;
  		}
 	}
}
开发者ID:nosubsgo,项目名称:numericalmethods,代码行数:27,代码来源:ising2d.c

示例8: generateRandomPyrFrustums

void generateRandomPyrFrustums( int n,
								float minFOV, float maxFOV,
								float minNear, float maxNear,
								float minFar, float maxFar,
								float minAspectRatio, float maxAspectRatio,
								float minPosX, float maxPosX,
								float minPosY, float maxPosY,
								float minPosZ, float maxPosZ,
								float minRotX, float maxRotX,
								float minRotY, float maxRotY,
								float minRotZ, float maxRotZ,
								std::vector<glPyramidalFrustum>& list )
{
	for(int i = 0; i < n; ++i )
	{
		float FOV = minFOV + randf()*( maxFOV - minFOV );
		float Near = minNear + randf()*( maxNear - minNear );
		float Far = minFar + randf()*( maxFar - minFar );
		float AspectRatio = minAspectRatio + randf()*( maxAspectRatio - minAspectRatio );
		float PosX = minPosX + randf()*( maxPosX - minPosX );
		float PosY = minPosY + randf()*( maxPosY - minPosY );
		float PosZ = minPosZ + randf()*( maxPosZ - minPosZ );
		float RotX = minRotX + randf()*( maxRotX - minRotX );
		float RotY = minRotY + randf()*( maxRotY - minRotY );
		float RotZ = minRotZ + randf()*( maxRotZ - minRotZ );
		glPyramidalFrustum f(FOV, Near, Far, AspectRatio, glVector4f(PosX, PosY, PosZ, 0), RotX, RotY, RotZ );
		list.push_back( f );
	}
}
开发者ID:Buanderie,项目名称:gpufrustum,代码行数:29,代码来源:utils.cpp

示例9: cart_rnd_star

void cart_rnd_star(int id)
{
	float x = randf(2.0)-1.0;
	float y = randf(2.0)-1.0;
	stars[id][0] = sqrtf(x*x+y*y);
	stars[id][1] = atan2(y,x);
}
开发者ID:marcan,项目名称:openlase,代码行数:7,代码来源:demo.c

示例10: SPIN_SPEED

PowerUp::PowerUp(float x, float y, int type) :
   SPIN_SPEED(0.002f)
{
   this->x = x;
   this->y = y;
   this->type = type;

   dx = randf(0.5f, 1.2f);
   dy = randf(0.5f, 1.2f);
   radius = 16;
   isDestructable = false;
   hp = 1;

   da = (rand() % 2) ? -SPIN_SPEED : SPIN_SPEED;

   ResourceManager& rm = ResourceManager::getInstance();
   
   switch (type) {
      case POWERUP_LIFE:
         bitmap = (ALLEGRO_BITMAP *)rm.getData(RES_LIFEPOWERUP);
         break;
      default:
         type = POWERUP_WEAPON;
         bitmap = (ALLEGRO_BITMAP *)rm.getData(RES_WEAPONPOWERUP);
         break;
   }
}
开发者ID:dradtke,项目名称:battlechess,代码行数:27,代码来源:PowerUp.cpp

示例11: updateGrainPosition

//get trigger position/volume relative to sound rects for single grain voice
void GrainClusterVis::getTriggerPos(unsigned int idx, double * playPos, double * playVol,float theDur)
{
    bool trigger = false;
    SoundRect * theRect = NULL;
    if (idx < myGrainsV->size()){
        GrainVis * theGrain = myGrainsV->at(idx);
        //TODO: motion models
        //updateGrainPosition(idx,gcX + randf()*50.0 + randf()*(-50.0),gcY + randf()*50.0 + randf()*(-50.0));
        updateGrainPosition(idx,gcX + (randf()*xRandExtent - randf()*xRandExtent),gcY + (randf()*yRandExtent - randf()*yRandExtent));
        for (int i = 0; i < theLandscape->size(); i++) {
            theRect = theLandscape->at(i);
            bool tempTrig = false;
            tempTrig = theRect->getNormedPosition(playPos,playVol,theGrain->getX(),theGrain->getY(),i);
            if (tempTrig == true)
                trigger = true;
            // cout << "playvol: " << *playPos << ", playpos: " << *playVol << endl;
            
        }
        if (trigger == true){
            theGrain->trigger(theDur);
        }
    }
    
    
}
开发者ID:hangtwenty,项目名称:borderlands-granular-pitch-patch,代码行数:26,代码来源:GrainCluster.cpp

示例12: setup

void setup(){

	map.init( 16, 14, 0.2 );

	printf( " %f \n", map.invStep );

/*
	Point2D* p = new Point2D( { 10.8, 13.9 } ); 
	printf( " p: %f %f \n",p->x,p->y );
	int ix,iy;
	map.boxIndex( p, ix, iy );
	printf( " ix,iy: %i %i \n",ix,iy );

*/

	for (int i=0; i<1000; i++){
		Point2D* p = new Point2D( { randf(0,2), randf(0,2) } );
		map.insert( p );
		//printf( " i:i0,ii,i0s[ii]  %i: %i %i %i \n", i, i0, ii, map.i0s[ii] );
	};

	map.makeStatic();


}
开发者ID:ProkopHapala,项目名称:cpp_arch,代码行数:25,代码来源:main.cpp

示例13: AppSDL2OGL

TestApp::TestApp( int& id, int WIDTH_, int HEIGHT_ ) : AppSDL2OGL( id, WIDTH_, HEIGHT_ ) {

    //int power = 8; int nside = 5;
    //int power = 11; int nside = 20;
    int power = 16; int nside = 300;
    //int power = 20; int nside = 400;
    //int power = 24; int nside = 1500;


	npoints = 4*nside*nside;
	points  = new Vec2d[npoints];
    map.init( 0.5f, power );
	printf( "map: %i %i %i %i \n", map.power, map.mask, map.capacity, map.filled );
	int i = 0;
	for( int iy=-nside+1; iy<nside; iy++ ){
		for( int ix=-nside+1; ix<nside; ix++ ){
			i++;
			points[ i ].set( ( ix + randf() ) * map.step, ( iy + randf() ) * map.step );
			//map.insertNoTest( &(points[i]), points[i].x, points[i].y  );
			map.insertIfNew( &(points[i]), points[i].x, points[i].y  );
			//printf( " insering (%i,%i) %i (%3.3f,%3.3f) \n", ix, iy, i, points[i].x, points[i].y );
		};
	};
	printf( "map: %i %i %i %i \n", map.power, map.mask, map.capacity, map.filled );

	hist.init( 20, 0, 20 );
	for( int i=0; i<map.capacity; i++ ){
		hist.insert( map.fields[i].n + 0.5 );
	}
	printf( "now comes printHistogram( hist );\n" );
	printHistogram( hist );
}
开发者ID:ProkopHapala,项目名称:SimpleSimulationEngine,代码行数:32,代码来源:test_HashMap2D_uniformity.cpp

示例14: random_points

void random_points(point ps[], int count, double min, double max, bool integer)
{
	std::set<std::pair<int, int>> points_set;
	if (integer)
	{
		for (int i = 0; i < count; i++)
		{
			bool unique = true;
			int x, y;
			do
			{
				x = (int)round(min + (max - min) * randf());
				y = (int)round(min + (max - min) * randf());
				if (points_set.find(std::make_pair(x, y)) != points_set.end())
					unique = false;
			} while (!unique);
			ps[i] = point(x, y);
			points_set.insert(std::make_pair(x, y));
		}
	}
	else
	{
		for (int i = 0; i < count; i++)
			ps[i] = point(min + (max - min) * randf(), min + (max - min) * randf());
	}
}
开发者ID:BichengLUO,项目名称:random_room,代码行数:26,代码来源:main.cpp

示例15: srand

Path SplineGenerator::makeBezier(int points, int nodes, int seed)
{
    srand(seed);
    Path path;
    int minDist = 0.35355;
    std::cout << "MinDist: " << minDist << std::endl;
    Vector2d start(randf(),0);
    Vector2d end(randf(),1);

    for (int node=0 ; node < nodes ; ++node)
    {

        Vector2d p0 = start;
        Vector2d p1(randf(), randf());
//        Vector2d p1(rand()%w,rand()%h);
        Vector2d p2(randf(), randf());
        Vector2d p3(randf(), randf());
        while(p3.getDistance(p1)<minDist)
        {
            p3.x = randf();
            p3.y = randf();
        }

        int pointsPerNode = points / nodes;
        for (int x=0; x<pointsPerNode;++x)
        {
            float t = x/float(pointsPerNode);
            Vector2d res= calculateBezierPoint(t,p0,p1,p2,p3);
            path.push_back(res);
        }

        start = p3;
    }

    //do last link
//    Vector2d p0 = start;
//    Vector2d p1(rand()%w,rand()%h);
//    Vector2d p2(rand()%w,rand()%h);
//    Vector2d p3 = end;
//    for (int x=0; x<steps;++x)
//    {
//        float t = x/float(steps);
//        Vector2d res= calculateBezierPoint(t,p0,p1,p2,p3);
//        if (x!=0)
//        {
//            out << t << "\t" << res.x <<"\t" << res.y << std::endl;
//        }
//        else
//        {
//            out << t << "\t" << res.x <<"\t" << res.y << "\t" << start.x << "\t" << start.y << std::endl;
//        }
//    }




    //end test for bezier curving
    return path;
}
开发者ID:samhaldenby,项目名称:NewComponentEngine,代码行数:59,代码来源:SplineGenerator.cpp


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