Game Physics Engine Development, 2nd Edition

58 Chapter 3 The Laws of Motion

Excerpt from file include/cyclone/precision.h

/** Defines the precision of the power operator. */

#define real_pow powf

Excerpt from file src/particle.cpp

#include <assert.h>

#include <cyclone/particle.h>

using namespace cyclone;

void Particle::integrate(real duration)

{

// We don’t integrate things with infinite mass.

if (inverseMass <= 0.0f) return;

assert(duration > 0.0);

// Update linear position.

position.addScaledVector(velocity, duration);

// Work out the acceleration from the force.

// (We’ll add to this vector when we come to generate forces.)

Vector3 resultingAcc = acceleration;

// Update linear velocity from the acceleration. ...