divide width and height by 2f to properly take into account resolutions

that are not divisible by 2

core/src/processing/opengl/PGraphics2D.java

@@ -156,7 +156,7 @@ public class PGraphics2D extends PGraphicsOpenGL {
 
   @Override
   protected void defaultCamera() {
-    super.camera(width/2, height/2);
+    super.camera(width/2f, height/2f);
   }
 
 

core/src/processing/opengl/PGraphicsOpenGL.java

@@ -4278,10 +4278,10 @@ public class PGraphicsOpenGL extends PGraphics {
   public void ortho(float left, float right,
                     float bottom, float top,
                     float near, float far) {
-    left   -= width/2;
-    right  -= width/2;
-    bottom -= height/2;
-    top    -= height/2;
+    left   -= width/2f;
+    right  -= width/2f;
+    bottom -= height/2f;
+    top    -= height/2f;
 
     // Flushing geometry with a different perspective configuration.
     flush();