Add jitter to area light and example render of it.

2020-03-02 14:03:31 +00:00
parent 1fbe682572
commit 21749695b6
12 changed files with 186 additions and 24 deletions
--- a/source/shapes/light.cpp
+++ b/source/shapes/light.cpp
@@ -47,5 +47,14 @@ double Light::intensityAt(World &w, Tuple point)

 Tuple Light::pointOnLight(uint32_t u, uint32_t v)
 {
-    return this->corner + this->uVec * (u+0.5) + this->vVec * (v+0.5);
+    if (this->jitter)
+    {
+        /* For some reason, for the test to pass, I need to get the sequence for V first, then U contrary to what
+         * the bonus chapter says
+         */
+        return this->corner +
+               this->vVec * (v + this->jitterBy.next()) +
+               this->uVec * (u + this->jitterBy.next());
+    }
+    return this->corner + this->uVec * (u + 0.5) + this->vVec * (v + 0.5);
 }