sfeng/ray-tracer-comp371
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create camera

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This commit is contained in:
Shuo Feng 2024-03-19 20:54:33 -04:00
parent eb9b6934c0
commit 29b87c041e
Signed by: sfeng
GPG key ID: 1E83AE6CD1C037B1
1 changed files with 24 additions and 11 deletions
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35
src/RayTracer.cc
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@ -23,6 +23,12 @@ Ray getRay(int, int, int, int, const Vector3f &, const Vector3f &,
void writeColor(int, const Vector3f &); void writeColor(int, const Vector3f &);
Vector3f trace(); Vector3f trace();
namespace camera {
int width, height;
void init();
} // namespace camera
void RayTracer::run() { void RayTracer::run() {
parse(); parse();
@ -45,22 +51,22 @@ void RayTracer::parse() {
} }
void RayTracer::render() { void RayTracer::render() {
int width = Scene::current->width(); camera::init();
int height = Scene::current->height();
Vector3f cameraPos = Scene::current->center(); Vector3f cameraPos = Scene::current->center();
Vector3f lookAt = Scene::current->lookAt(); Vector3f lookAt = Scene::current->lookAt();
float vpHeight = float vpHeight =
2 * tan(Scene::current->fov() / 180 * M_PI / 2) * lookAt.norm(); 2 * tan(Scene::current->fov() / 180 * M_PI / 2) * lookAt.norm();
float vpWidth = vpHeight * width / height; float vpWidth = vpHeight * camera::width / camera::height;
Vector3f u = Vector3f(vpWidth, 0, 0); Vector3f u = Vector3f(vpWidth, 0, 0);
Vector3f v = Vector3f(0, -vpHeight, 0); Vector3f v = Vector3f(0, -vpHeight, 0);
Vector3f du = u / width; Vector3f du = u / camera::width;
Vector3f dv = v / height; Vector3f dv = v / camera::height;
Vector3f vpUpperLeft = cameraPos + lookAt - u / 2.0 - v / 2.0; Vector3f vpUpperLeft = cameraPos + lookAt - u / 2.0 - v / 2.0;
Vector3f pxUpperLeft = vpUpperLeft + (du + dv) / 2.0; Vector3f pxUpperLeft = vpUpperLeft + (du + dv) / 2.0;
Output::current = new Output(Scene::current->name(), width, height); Output::current =
new Output(Scene::current->name(), camera::width, camera::height);
VectorXi data = Scene::current->raysPerPixel(); VectorXi data = Scene::current->raysPerPixel();
int gridWidth = getGridWidth(data); int gridWidth = getGridWidth(data);
@ -74,11 +80,11 @@ void RayTracer::render() {
gdv = dv / gridHeight; gdv = dv / gridHeight;
} }
for (int y = 0; y < height; ++y) { for (int y = 0; y < camera::height; ++y) {
// print progress bar // print progress bar
utils::Progress::of((y + 1.0f) / height); utils::Progress::of((y + 1.0f) / camera::height);
for (int x = 0; x < width; ++x) { for (int x = 0; x < camera::width; ++x) {
Vector3f color = Scene::current->backgroundColor(); Vector3f color = Scene::current->backgroundColor();
if (Scene::current->globalIllum()) { if (Scene::current->globalIllum()) {
@ -99,10 +105,10 @@ void RayTracer::render() {
if (!records.empty()) { if (!records.empty()) {
HitRecord hit = records.top(); HitRecord hit = records.top();
hit.calcNormal(); hit.calcNormal();
color = calculateColor(hit, y * width + x); color = calculateColor(hit, y * camera::width + x);
} }
} }
writeColor(y * width + x, color); writeColor(y * camera::width + x, color);
} }
} }
std::cout << std::endl; std::cout << std::endl;
@ -150,3 +156,10 @@ void writeColor(int i, const Vector3f &color) {
} }
Vector3f trace() { return Vector3f::Zero(); } Vector3f trace() { return Vector3f::Zero(); }
namespace camera {
void init() {
width = Scene::current->width();
height = Scene::current->height();
}
} // namespace camera