void VoxSprite::chooseRandomDir()
{
int d = int( randUniform() * 5.0 );
m_angle = d * 90.0;
m_timeout = randNormal( 4.0, 1.0 );
}
void ParticleBuff::emitRadial( ParticleType ptype, float x, float y, float radius )
{
Particle *p = emitPart( ptype );
if (!p) return; // Buff full
// set up general stuff
const float initialVel = 50.0;
p->x = x + randNormal() * radius;
p->y = y + randNormal() * radius;
p->maxAge = 3.0 + randNormal();
if ((ptype==Particle_RIPPLE) || (ptype==Particle_SMOKE))
{
p->angle = 0.0;
p->dx = 0.0;
p->dy = 0.0;
}
else if (ptype == Particle_DOT)
{
p->dx = randNormal() * initialVel;
p->dy = (1.0+randNormal()) * initialVel;
}
else
{
p->angle = randUniform() * 360.0;
p->dx = randNormal() * initialVel;
p->dy = randNormal() * initialVel;
}
p->age = 0;
}
/*!
* Determines and returns the power of the motor in each cycle.
* Should be called only once per cycle!
*/
double cbMotor::outPower()
{
double noisepow = randNormal(100.0, noise) / 100.0;
outpower = (0.5*inpower + 0.5*prevpower) * noisepow;
prevpower = outpower;
return outpower;
}
/*
* Method:
* void global_test(void)
*
* Purpose:
* Tests the global functions. The pseudorandom distributions
* were tested by porting the result to Excel, and looking
* at the histogram, the average, and the stdev.
*
* Input:
* none
*
* Output:
* none
*/
void global_test(void)
{
// only about 3 values should be beyond the [0,60] interval of 3*stdev around the mean for the normal
for( int i=0; i<1000; i++ )
printf("%f\t%f\n", randNormal(30,10), randExponential(10));
alert("test");
char *str = strdup("1Ux:");
printf("%s\n",strlwr(str));
printf("%d\n", stricmp( "A", "a" ) );
printf("%d\n", stricmp( "B", "a" ) );
printf("%d\n", stricmp( "aabDDD", "Edsa" ) );
}
void ParticleBuff::emitRadial( ParticleType ptype, float x, float y, float radius )
{
Particle *p = emitPart( ptype );
if (!p) return; // Buff full
// set up general stuff
const float initialVel = 50.0;
p->x = x + randNormal() * radius;
p->y = y + randNormal() * radius;
p->maxAge = 3.0 + randNormal();
//p->r = 1.0; p->g = 1.0; p->b = 1.0;
float t = randUniform();
float rA = 166/255.0; float gA = 202/255.0; float bA = 222/255.0;
float rB = 31/255.0; float gB = 45/255.0; float bB = 227/255.0;
p->r = (rA*t) + (rB*(1.0-t));
p->g = (gA*t) + (gB*(1.0-t));
p->b = (bA*t) + (bB*(1.0-t));
if ((ptype==Particle_RING) || (ptype==Particle_SMOKE))
{
p->angle = randUniform( 0.0, 360.0);
p->dx = 0.0;
p->dy = 0.0;
}
else if (ptype == Particle_DOT)
{
p->dx = randNormal() * initialVel;
p->dy = (1.0+randNormal()) * initialVel;
}
else
{
p->angle = randUniform() * 360.0;
p->dx = randNormal() * initialVel;
p->dy = randNormal() * initialVel;
}
p->age = 0;
}
float randNormal( float mean, float stddev )
{
return (randNormal() * stddev) + mean;
}
