created bounding boxes

src/BoundingBox.cpp

@@ -0,0 +1,24 @@
+#include "BoundingBox.h"
+#include <cstdlib>
+
+BoundingBox::BoundingBox(Quad &quad) {
+  this->parent = (size_t)&quad;
+  init(quad);
+}
+BoundingBox::BoundingBox() {}
+
+void BoundingBox::update() {
+  Quad *quad = (Quad *)parent;
+  init(quad[0]);
+}
+
+void BoundingBox::render(SDL_Renderer *rend) {
+  uint8_t r,g,b,a;
+  SDL_GetRenderDrawColor(rend,&r,&g,&b,&a);
+  SDL_SetRenderDrawColor(rend,WHITE);
+  SDL_RenderDrawLine(rend,box.topL.x,box.topL.y,box.topR.x,box.topR.y);
+  SDL_RenderDrawLine(rend,box.topR.x,box.topR.y,box.botR.x,box.botR.y);
+  SDL_RenderDrawLine(rend,box.botR.x,box.botR.y,box.botL.x,box.botL.y);
+  SDL_RenderDrawLine(rend,box.botL.x,box.botL.y,box.topL.x,box.topL.y);
+  SDL_SetRenderDrawColor(rend,r,g,b,a);
+}

src/BoundingBox.h

@@ -0,0 +1,44 @@
+#include <cstddef>
+#include "Quad.h"
+
+class BoundingBox {
+  private:
+  size_t parent;
+  void init(Quad quad) {
+    xvalues[0] = quad.topL.x;
+    xvalues[1] = quad.topR.x;
+    xvalues[2] = quad.botR.x;
+    xvalues[3] = quad.botL.x;
+
+    yvalues[0] = quad.topL.y;
+    yvalues[1] = quad.topR.y;
+    yvalues[2] = quad.botR.y;
+    yvalues[3] = quad.botL.y;
+
+    for(int i=0; i<4; i++) {
+      if(xvalues[i] > max.x) {
+        max.x = xvalues[i];
+      } else {
+        if(xvalues[i] < min.x) {
+          min.x = xvalues[i];
+        }
+      }
+      if(yvalues[i] > max.y) {
+        max.y = yvalues[i];
+      } else {
+        if(min.y < yvalues[i]) {
+          min.y = yvalues[i];
+        }
+      }
+    }
+    box = Quad(Vector(min.x,min.y),Vector(max.x,max.y));
+  }
+  public:
+  int xvalues[4],yvalues[4];
+  Vector max,min;
+  Quad box;
+  BoundingBox(Quad &quad);
+  BoundingBox();
+  void update();
+  void render(SDL_Renderer *rend);
+};