SDLPP: mouse position functions

2021-04-29 19:48:05 +02:00
parent 90dc26251b
commit 4f20274f11
3 changed files with 51 additions and 1 deletions
@@ -0,0 +1,31 @@
+#include "sdlpp_mouse.hpp"
+#include "sdlpp_renderobject.hpp"
+
+SDLPP::Vec2D< int > SDLPP::Mouse::getMousePosition() {
+    int x, y;
+    SDL_GetMouseState( &x, &y );
+    return { x, y };
+}
+
+SDLPP::Vec2D< double >
+SDLPP::Mouse::getMousePositionDouble( const SDLPP::Renderer &r,
+                                      SDLPP::ObjectAlignment alignment_x,
+                                      SDLPP::ObjectAlignment alignment_y ) {
+    auto pixel_pos = getMousePosition();
+    auto smaller = r.getSmallerSide();
+    Vec2D< double > ret = { static_cast< double >( pixel_pos.getX() ) / smaller,
+                            static_cast< double >( pixel_pos.getY() ) /
+                                smaller };
+    Vec2D< double > additions =
+        ( r.getDoubleDimensions() - Vec2D< double >( 1.0, 1.0 ) ) / 2;
+    switch ( alignment_x ) {
+    case SDLPP::OBJ_CENTER:
+        ret -= additions;
+        break;
+    case SDLPP::OBJ_END:
+        ret -= 2 * additions;
+    default:
+        break;
+    }
+    return ret;
+}