created circle type

Makefile

@@ -1,11 +1,11 @@
 CC = clang
-LINK = -lstdc++ -lSDL2
+LINK = -lstdc++ -lSDL2 -lm -ldl -lSDL_gfx
 DBG = -Wall -O3
 CC += $(DBG)
 
 all: build ;
 
-goals = bin/main.o bin/Color.o bin/Quad.o bin/Vector.o bin/phys_obj.o bin/BoundingBox.o
+goals = bin/main.o bin/Color.o bin/Quad.o bin/Vector.o bin/phys_obj.o bin/BoundingBox.o bin/Circle.o
 
 define pro =
 $(CC) -c $^ -o $@
@@ -23,6 +23,8 @@ bin/Vector.o: src/Vector.cpp
 	$(pro)
 bin/phys_obj.o: src/phys_obj.cpp
 	$(pro)
+bin/Circle.o: src/Circle.cpp
+	$(pro)
 
 #targets = $(patsubst bin/%.o,src/%.cpp,$(goals))
 #$(goals): $(targets) ;

src/Circle.cpp

@@ -0,0 +1,41 @@
+#include "Circle.h"
+#include <SDL2/SDL2_gfxPrimitives.h>
+
+#ifndef PI
+#define PI 3.14159265359
+#endif
+
+#define toradians(a) a*PI/180
+
+Circle::Circle(Vector c, int r) {
+  center.x = c.x;
+  center.y = c.y;
+  radius = r;
+}
+
+void Circle::translate(Vector vec) {
+  if(vec.x != 0) {
+    center.x += vec.x;
+  }
+  if(vec.y != 0) {
+    center.y += vec.y;
+  }
+}
+
+void Circle::setColor(Color c) {
+  this->color = c;
+}
+
+void Circle::render(SDL_Renderer *renderer) {
+  uint8_t r,g,b,a;
+  SDL_GetRenderDrawColor(renderer,&r,&g,&b,&a);
+  SDL_SetRenderDrawColor(renderer,color.r,color.g,color.b,color.a);
+  for(int x=center.x-radius; x<=center.x+radius; x++) {
+    for(int y=center.y-radius; y<=center.y+radius; y++) {
+      if((pow(center.y-y,2)+pow(center.x-x,2)) <= pow(radius,2)) {
+        SDL_RenderDrawPoint(renderer,x,y);
+      }
+    }
+  }
+  SDL_SetRenderDrawColor(renderer,r,g,b,a);
+}

src/Circle.h

@@ -0,0 +1,29 @@
+#include <SDL2/SDL.h>
+#include <cmath>
+#include "Vector.h"
+#include "Color.h"
+
+class Circle {
+  private:
+  int testpoint(int x,int y) {
+    return pow(x,2)+pow(y,2)-pow(radius,2);
+  }
+  bool incircle(int x,int y) {
+    return testpoint(x,y) < 0;
+  }
+  bool outcircle(int x,int y) {
+    return testpoint(x,y) > 0;
+  }
+  bool oncircle(int x,int y) {
+    return testpoint(x,y) == 0;
+  }
+  public:
+  Color color;
+  int x,y,radius;
+  Vector center;
+  Circle(Vector center, int radius);
+  Circle();
+  void render(SDL_Renderer *renderer);
+  void translate(Vector vec);
+  void setColor(Color c);
+};