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simulator.cpp
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simulator.cpp
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#include "simulator.h"
#include "billboards2d.h"
#include "points2d.h"
#include <cmath>
#include <iostream>
#include <functional>
#include <QDebug>
using std::cout; using std::endl; using std::function; using std::vector;
Simulator::Simulator(QObject *parent) :
QObject(parent)
{
unsigned int numberOfBalls = 100;
for(unsigned int i=0; i<numberOfBalls; i++) {
float x = 2.0*(rand() / double(RAND_MAX)) - 1.0;
float y = 2.0*(rand() / double(RAND_MAX)) - 1.0;
float vx = 2.0*(rand() / double(RAND_MAX)) - 1.0;
float vy = 2.0*(rand() / double(RAND_MAX)) - 1.0;
x *= 0.5;
y *= 0.5;
vx *= 0.3;
vy *= 0.3;
positions.push_back(QVector2D(x,y));
velocities.push_back(QVector2D(vx,vy));
}
Billboards2D *billboards = new Billboards2D(
[&](RenderableObject *renderableObject) {
Billboards2D *obj = static_cast<Billboards2D*>(renderableObject);
obj->setPositions(positions);
}
, ":/football.png");
billboards->setScale(0.1);
billboards->setColor(QColor("white"));
Points2D *points = new Points2D([&](RenderableObject *renderableObject) {
Points2D *obj = static_cast<Points2D*>(renderableObject);
obj->setData(positions, QVector3D(1.0, 0.0, 0.0));
});
points->setPointSize(10.0);
m_renderableObjects.push_back(billboards);
m_renderableObjects.push_back(points);
}
Simulator::~Simulator()
{
}
vector<RenderableObject *> &Simulator::renderableObjects()
{
return m_renderableObjects;
}
void Simulator::setRenderableObjects(vector<RenderableObject *> &renderableObjects)
{
m_renderableObjects = renderableObjects;
}
void Simulator::step()
{
float springConstant = 1.0;
float mass = 1.0;
float k = springConstant;
float dt = 0.01;
for(unsigned int i=0; i<positions.size(); i++) {
QVector2D force;
force.setX(-k*positions[i][0]);
force.setY(-k*positions[i][1]);
velocities[i][0] += force[0]/mass*dt;
velocities[i][1] += force[1]/mass*dt;
positions[i][0] += velocities[i][0]*dt;
positions[i][1] += velocities[i][1]*dt;
}
emit stepCompleted();
}