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Primitive sampling

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IlyaShurupov 2023-10-18 12:05:01 +03:00 • committed by Ilya Shurupov
parent 368ae81251
commit 77db3f4ab5
9 changed files with 242 additions and 80 deletions
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129
RayTracer/private/RayTracer.cpp
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@ -10,6 +10,38 @@
#include <cstdio>
/*
if (1) {
const auto& points = castData.obj->mCache.TransformedPoints;
const auto& normals = castData.obj->mCache.TransformedNormals;
const auto trig = castData.trig;
const auto& n1 = normals[trig->mP1];
const auto& n2 = normals[trig->mP2];
const auto& n3 = normals[trig->mP3];
auto v0 = points[trig->mP1];
auto v1 = points[trig->mP2];
auto v2 = points[trig->mP3];
// Calculate barycentric coordinates
Vec3F barycentric;
// Calculate the area of the triangle
auto areaABC = (halnf) (v1 - v0).cross(v2 - v0).length();
auto areaPBC = (halnf) (v1 - castData.hitPos).cross(v2 - castData.hitPos).length();
auto areaPCA = (halnf) (v2 - castData.hitPos).cross(v0 - castData.hitPos).length();
// Calculate the barycentric coordinates
barycentric.x = areaPBC / areaABC;
barycentric.y = areaPCA / areaABC;
barycentric.z = 1.0f - barycentric.x - barycentric.y;
// Interpolate the normal using barycentric coordinates
normal = n1 * barycentric.x + n2 * barycentric.y + n3 * barycentric.z;
}
*/
using namespace tp;
ModuleManifest* sDependencies[] = {&gModuleMath, &gModuleCommandLine, &gModuleConnection, nullptr};
@ -28,7 +60,7 @@ void RayTracer::castRay(const Ray& ray, RayCastData& out, alnf far) {
auto dist = (trig->getHitPos() - ray.pos).length2();
if (far > dist) {
if (far > dist && dist > EPSILON) {
out.trig = &trig.data();
out.hitPos = trig->getHitPos();
out.obj = &obj.data();
@ -41,9 +73,58 @@ void RayTracer::castRay(const Ray& ray, RayCastData& out, alnf far) {
}
}
void RayTracer::render(const Scene& scene, RayTracer::RenderBuffer& buff) {
void RayTracer::cycle(const RayCastData& castData, LightData& out, uhalni depth) {
if (depth) {
depth--;
Vec3F normal = castData.trig->getNormal();
normal.normalize();
const auto delta1 = castData.trig->mEdgeP1P2.unitV();
const auto delta2 = normal.cross(delta1);
for (auto idx : Range(mSettings.spray)) {
RayCastData materialCastData;
LightData lightData;
auto d1 = ((halnf) randomFloat() - 0.5f) * 2;
auto d2 = ((halnf) randomFloat() - 0.5f) * 2;
auto sprayNormal = (normal + delta1 * d1 + delta2 * d2).normalize();
castRay({sprayNormal, castData.hitPos}, materialCastData, mScene->mCamera.getFar());
if (materialCastData.hit) {
cycle(materialCastData, lightData, depth);
out.intensity += lightData.intensity * 0.2;
}
}
}
// cast for light
for (auto light : mScene->mLights) {
RayCastData lightCastData;
auto dir = light->pos - castData.hitPos;
auto length = (halnf) dir.length();
Ray lightRay = {dir.unitV(), castData.hitPos};
if (lightRay.dir.dot(castData.trig->mNormal) < 0) {
continue;
}
castRay(lightRay, lightCastData, length);
if (lightCastData.hit) {
continue;
}
out.intensity += light->intensity / (length * length);
}
}
void RayTracer::render(const Scene& scene, RayTracer::RenderBuffer& buff, const RenderSettings& settings) {
mScene = &scene;
mBuff = &buff;
mSettings = settings;
auto pos = mScene->mCamera.getPos();
auto fov = mScene->mCamera.getFOV();
@ -71,54 +152,20 @@ void RayTracer::render(const Scene& scene, RayTracer::RenderBuffer& buff) {
for (RayTracer::RenderBuffer::Index i = 0; i < buff.size().x; i++) {
for (RayTracer::RenderBuffer::Index j = 0; j < buff.size().y; j++) {
iterPoint = planeLeftTop + ((deltaX * (halnf) i) + (deltaY * (halnf) j));
ray.dir = (iterPoint - pos).unitV();
castRay(ray, castData, mScene->mCamera.getFar());
if (castData.hit) {
Vec3F normal = castData.trig->getNormal();
LightData lightData;
cycle(castData, lightData, mSettings.depth);
if (1) {
const auto& points = castData.obj->mCache.TransformedPoints;
const auto& normals = castData.obj->mCache.TransformedNormals;
const auto trig = castData.trig;
lightData.intensity = clamp(lightData.intensity, 0.f, 1.f);
RGBA col = {lightData.intensity, lightData.intensity, lightData.intensity, 1.f};
const auto& n1 = normals[trig->mP1];
const auto& n2 = normals[trig->mP2];
const auto& n3 = normals[trig->mP3];
auto v0 = points[trig->mP1];
auto v1 = points[trig->mP2];
auto v2 = points[trig->mP3];
// Calculate barycentric coordinates
Vec3F barycentric;
// Calculate the area of the triangle
auto areaABC = (halnf) (v1 - v0).cross(v2 - v0).length();
auto areaPBC = (halnf) (v1 - castData.hitPos).cross(v2 - castData.hitPos).length();
auto areaPCA = (halnf) (v2 - castData.hitPos).cross(v0 - castData.hitPos).length();
// Calculate the barycentric coordinates
barycentric.x = areaPBC / areaABC;
barycentric.y = areaPCA / areaABC;
barycentric.z = 1.0f - barycentric.x - barycentric.y;
// Interpolate the normal using barycentric coordinates
normal = n1 * barycentric.x + n2 * barycentric.y + n3 * barycentric.z;
}
normal.normalize();
RGBA col = {normal.x * 0.5f + 0.5f, normal.y * 0.5f + 0.5f, normal.z * 0.5f + 0.5f, 1.f};
buff.set({i, j}, col);
// auto depth = 1 - clamp((halnf) (castData.hitPos - ray.pos).length(), 0.f, mScene->mCamera.getFar()) / mScene->mCamera.getFar();
// buff.set({i, j}, {depth, depth, depth, 1.f});
} else {
buff.set({i, j}, RGBA(0.f, 0.f, 0.f, 0.f));
buff.set({i, j}, 0.f);
}
}
}