Add basic rotation

Rotate texuture based on mouse position

src/Math.cpp

@@ -0,0 +1,27 @@
+#include "Math.hpp"
+
+Color ColorLerp(Color c1, Color c2, float amount)
+{
+  Color ret{0};
+  ret.r = Clamp(Lerp(c1.r, c2.r, amount), 0, 255);
+  ret.g = Clamp(Lerp(c1.g, c2.g, amount), 0, 255);
+  ret.b = Clamp(Lerp(c1.b, c2.b, amount), 0, 255);
+  ret.a = Clamp(Lerp(c1.a, c2.a, amount), 0, 255);
+  return ret;
+}
+
+Rectangle CalculateRect(Vector2 center, float rotation, float width, float height)
+{
+  Rectangle ret = {0, 0, width, height};
+  width /= 2;                                                      // a
+  height /= 2;                                                     // b
+  float len = std::sqrt(std::pow(width, 2) + std::pow(height, 2)); // c
+  rotation += 180.0f;                                              // add 180 to point 0 up
+  float angle = (rotation * PI) / 180.0f;                          // from degrees to radians
+  angle += std::atan(width / height);                              // add angle alfa
+  float nx = len * std::sin(angle);
+  float ny = len * std::cos(angle);
+  ret.x = center.x + nx;
+  ret.y = center.y + ny;
+  return ret;
+}

src/Tree.cpp

@@ -24,6 +24,7 @@ void Tree::draw(Rectangle dest, float rotation)
 {
   Rectangle source = {0, 0, (float)target.texture.width, (float)-target.texture.height};
   Vector2 origin = {0.0f, 0.0f};
+  rotation = 360 - rotation;
   DrawTexturePro(target.texture, source, dest, origin, rotation, WHITE);
 }