/**
* The renderImage method renders the entire scene.
*
* @param scene The scene to be rendered
*/
public void renderImage(Scene scene) {
// Get the output image
Image image = scene.getImage();
Camera cam = scene.getCamera();
// Set the camera aspect ratio to match output image
int width = image.getWidth();
int height = image.getHeight();
// Timing counters
long startTime = System.currentTimeMillis();
// Do some basic setup
Ray ray = new Ray();
Colord rayColor = new Colord();
int total = height * width;
int counter = 0;
int lastShownPercent = 0;
double exposure = scene.getExposure();
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
rayColor.setZero();
cam.getRay(ray, (x + 0.5) / width, (y + 0.5) / height);
shadeRay(rayColor, scene, ray);
rayColor.mul(exposure);
image.setPixelColor(rayColor, x, y);
counter++;
if ((int) (100.0 * counter / total) != lastShownPercent) {
lastShownPercent = (int) (100.0 * counter / total);
System.out.println(lastShownPercent + "%");
}
}
}
// Output time
long totalTime = (System.currentTimeMillis() - startTime);
System.out.println("Done. Total rendering time: " + (totalTime / 1000.0) + " seconds");
}
/**
* This method returns the color along a single ray in outColor.
*
* @param outColor output space
* @param scene the scene
* @param ray the ray to shade
*/
public static void shadeRay(Colord outColor, Scene scene, Ray ray) {
// TODO#A2: Compute the color of the intersection point.
// 1) Find the first intersection of "ray" with the scene.
// Record intersection in intersectionRecord. If it doesn't hit anything,
// just return the scene's background color.
// 2) Get the shader from the intersection record.
// 3) Call the shader's shade() method to set the color for this ray.
IntersectionRecord outRecord = new IntersectionRecord();
boolean itInterescts = scene.getFirstIntersection(outRecord, ray);
if (!itInterescts) {
outColor.set(scene.getBackColor());
} else {
outRecord.surface.getShader().shade(outColor, scene, ray, outRecord);
}
}