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#include <string>
#include <chrono>
#include <iostream>
#include "util.h"
#include "image.h"
#include "scene.h"
#include "imageIO.h"
#include "sceneIO.h"
image generateImage(const scene& s)
{
image result(s.getCamera().width(), s.getCamera().height());
// for every pixel
for(image::size_type y=0; y < result.height(); y++)
for(image::size_type x=0; x < result.width(); x++)
{
// generate view ray
ray r = s.getCamera()(x,y);
// intersect scene
intersectionPoint ip = s.intersect(r);
// shade pixel
if(ip.isHit())
{
// for each light source
for(unsigned int l=0; l < s.numberOfLightsources(); l++)
{
// connect to light source
lightSample ls = s.getLightsource(l).intensityAt(ip.position());
// shade
result(x,y) += ip.shade(ls);
}
}
else result(x,y) = color(0.0f, 0.0f, 0.0f);
}
// Done.
return result;
}
int main(int argc, char** argv)
{
// parse command line
if(argc < 2)
{
std::cout << "Usage: " << argv[0] << " <scene.xml> [scene2.xml ...]" << std::endl;
return -1;
}
// for each filename, import scene and render
unsigned int pos=1;
while(pos < argc)
{
// get filename
std::string filename = argv[pos++];
// import
std::cerr << " * Reading " << filename << std::endl;
scene s;
importScene(filename, s);
// render
std::cerr << " * Rendering... ";
auto startTime = std::chrono::system_clock::now();
image result = generateImage(s);
auto endTime = std::chrono::system_clock::now();
std::chrono::duration<float> duration = endTime - startTime;
std::cerr << duration.count() << " seconds." << std::endl;
// save image
std::cerr << " * Writing result." << std::endl;
exportImage(getFilename(filename) + ".ppm", result);
}
// Done.
return 0;
}
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