+ // Camera dragging
+ {
+ static v2f drag_origin; // x/y pixel
+
+ if( vg_get_button_down( "tertiary" ) )
+ v2_copy( vg_mouse, drag_origin );
+ else if( vg_get_button( "tertiary" ) )
+ {
+ // get offset
+ v2_sub( vg_mouse, drag_origin, drag_offset );
+ v2_div( drag_offset, (v2f){ vg_window_x, vg_window_y }, drag_offset );
+ v2_mul( drag_offset, (v2f){ size_current*2.0f, -size_current*r1*2.0f }, drag_offset );
+ }
+ else
+ {
+ v2_copy( result_view, view_point );
+ v2_copy( (v2f){0.0f,0.0f}, drag_offset );
+ }
+ }
+
+ // Zooming
+ {
+ v2f mview_local;
+ v2f mview_new;
+ v2f mview_cur;
+ v2f mview_delta;
+ float rsize;
+
+ rsize = size-view_zoom_extra;
+
+ v2_div( vg_mouse, (v2f){ vg_window_x*0.5f, vg_window_y*0.5f }, mview_local );
+ v2_add( (v2f){ -rsize, -rsize*r1 }, (v2f){ mview_local[0]*rsize, (2.0f-mview_local[1])*rsize*r1 }, mview_cur );
+
+ view_zoom_extra = vg_clampf( view_zoom_extra + vg_mouse_wheel[1], 0.0f, size - 4.0f );
+
+ // Recalculate new position
+ rsize = size-view_zoom_extra;
+ v2_add( (v2f){ -rsize, -rsize*r1 }, (v2f){ mview_local[0]*rsize, (2.0f-mview_local[1])*rsize*r1 }, mview_new );
+
+ // Apply offset
+ v2_sub( mview_new, mview_cur, mview_delta );
+ v2_add( mview_delta, view_point, view_point );
+ }
+