breakout: delete pong, add breakout

1 files changed, 24 insertions, 0 deletions

diff --git a/src/common/math.hpp b/src/common/math.hpp
index afbda1a..48a5869 100644
--- a/src/common/math.hpp
+++ b/src/common/math.hpp
@@ -2,6 +2,8 @@
 
 #include <cstddef>
 #include <cstdint>
+#include <common/shapes.hpp>
+#include <algorithm>
 
 
 struct V2ST {
@@ -56,3 +58,25 @@ struct Color {
     float a;
 };
 
+
+inline bool
+Intersect_Rectangle_Circle(Rectangle rect, Circle circle)
+{
+    float xmin = std::min(rect.x0, rect.x1);
+    float xmax = std::max(rect.x0, rect.x1);
+    float ymin = std::min(rect.y0, rect.y1);
+    float ymax = std::max(rect.y0, rect.y1);
+
+    float closest_x = std::max(xmin, std::min(circle.x, xmax));
+    float closest_y = std::max(ymin, std::min(circle.y, ymax));
+
+    float dx = closest_x - circle.x;
+    float dy = closest_y - circle.y; 
+    float d_sq = dx*dx + dy*dy;
+
+    float r_sq = circle.r * circle.r;
+
+    bool is_intersect = d_sq <= r_sq;
+    return is_intersect;
+}
+