void Camera::RenderPath(Scene &scn, int n) {
RayTrace rayTrace(scn);
for (int y = 0; y < _img.YRes; y++) {
for (int x = 0; x < _img.XRes; x++) {
// compute the primary ray
Vector3 cy;
cy.Cross(_worldMatrix.c, _worldMatrix.b);
Vector3 cx = cy / pow(cy.Magnitude(), 2);
cy.Cross(cx, _worldMatrix.c);
float hfov = 2.f * atanf(_aspect * tanf(_verticalFOV / 2.f));
float cw = 2.f * tanf(hfov/2.f);
float ch = cw / _aspect;
Ray ray;
ray.Origin = _worldMatrix.d;
ray.Direction =
_worldMatrix.c + ((float)(x + 0.5f) / (float)_img.XRes - 0.5f) * cw * cx +
((float)(y + 0.5f)/(float)_img.YRes - 0.5f) * ch * cy;
ray.type = Ray::PRIMARY;
// shoot the primary ray
Intersection hit;
if (x > 124 && x <= 140 && y == _img.YRes - 495 ) {
// Color white = Color::WHITE;
// std::cout << "debug pixel" << std::endl;
// _img.SetPixel(x, y, white.ToInt());
// continue;
}
rayTrace.TraceRay(ray, hit);
if (n != -1) {
Color c;
c.FromInt(_img.GetPixel(x, y));
Color avg = Color::BLACK;
avg.AddScaled(c, n - 1);
avg.Add(hit.Shade);
avg.Scale(1.0f / n);
_img.SetPixel(x, y, avg.ToInt());
}
else _img.SetPixel(x, y, hit.Shade.ToInt());
}
}
}
