stuff

t.h

@@ -30,31 +30,18 @@ public:
 		return tr;
 	}
 
-	BoundingBox GetAABB() {
-		std::vector<glm::vec3> corners = {
-			{0.5f,0.5f,0.5f},
-			{0.5f,-0.5f,0.5f},
-			{0.5f,-0.5f,-0.5f},
-			{0.5f,0.5f,-0.5f},
-			{-0.5f,0.5f,0.5f},
-			{-0.5f,-0.5f,0.5f},
-			{-0.5f,0.5f,-0.5f},
-			{-0.5f,-0.5f,-0.5f},
-		};
+	BoundingBox GetAABB() const {
+		// Each world axis reaches as far as the rotated box's axes add up to, no need to visit the corners
+		const glm::mat3 rotation = glm::mat3_cast(orient);
+		const glm::vec3 half = scale * 0.5f;
+		const glm::vec3 extent =
+			glm::abs(rotation[0]) * half.x +
+			glm::abs(rotation[1]) * half.y +
+			glm::abs(rotation[2]) * half.z;
 
-		glm::vec3 min(FLT_MAX);
-		glm::vec3 max(-FLT_MAX);
-		for (glm::vec3& corner : corners) {
-			corner *= scale;
-			corner = orient * corner;
-			corner += pos;
-			min = { glm::min(min.x, corner.x) ,glm::min(min.y, corner.y), glm::min(min.z, corner.z) };
-			max = { glm::max(max.x, corner.x) ,glm::max(max.y, corner.y), glm::max(max.z, corner.z) };
-		}
 		BoundingBox tr;
-		tr.min = min;
-		tr.max = max;
-		//std::cout << tr.min.x << ' ' << tr.min.y << ' ' << tr.min.z << ' ' << tr.max.x << ' ' << tr.max.y << ' ' << tr.max.z << '\n';
+		tr.min = pos - extent;
+		tr.max = pos + extent;
 		return tr;
 	}