+
+ if (me.zoomFactor)
+ me.imgSize = me.imgSize * me.zoomFactor;
+
+ if(me.imgSize_x > 1 || me.imgSize_y > 1)
+ {
+ me.zoomOffset_x = bound(0, me.zoomOffset_x, 1);
+ me.zoomOffset_y = bound(0, me.zoomOffset_y, 1);
+ }
+ else
+ me.zoomOffset = '0.5 0.5 0';
+
+ me.imgOrigin_x = 0.5 - me.zoomOffset_x * me.imgSize_x;
+ me.imgOrigin_y = 0.5 - me.zoomOffset_y * me.imgSize_y;
+}
+float Image_drag_setStartPos(entity me, vector coords)
+{
+ //if(me.imgSize_x > 1 || me.imgSize_y > 1) // check disabled: mousewheel zoom may start from a non-zoomed-in image
+ {
+ me.start_zoomOffset = me.zoomOffset;
+ me.start_coords = coords;
+ }
+ return 1;
+}
+float Image_drag(entity me, vector coords)
+{
+ if(me.imgSize_x > 1 || me.imgSize_y > 1)
+ {
+ me.zoomOffset_x = me.start_zoomOffset_x + (me.start_coords_x - coords_x) / me.imgSize_x;
+ me.zoomOffset_y = me.start_zoomOffset_y + (me.start_coords_y - coords_y) / me.imgSize_y;
+ me.updateAspect(me);
+ }
+ return 1;
+}
+void Image_setZoom(entity me, float z, float atMousePosition)
+{
+ float prev_zoomFactor;
+ prev_zoomFactor = me.zoomFactor;
+ if (z < 0) // multiply by the current zoomFactor
+ {
+ me.zoomFactor *= -z;
+ float one_in_the_middle, initialZoom_in_the_middle;
+ one_in_the_middle = ((prev_zoomFactor - 1) * (me.zoomFactor - 1) < 0);
+ initialZoom_in_the_middle = (me.initialForcedZoom > 0 && (prev_zoomFactor - me.initialForcedZoom) * (me.zoomFactor - me.initialForcedZoom) < 0);
+ if (one_in_the_middle && initialZoom_in_the_middle)
+ {
+ // snap to real dimensions or to box
+ if (prev_zoomFactor < me.zoomFactor)
+ me.zoomFactor = min(1, me.initialForcedZoom);
+ else
+ me.zoomFactor = max(1, me.initialForcedZoom);
+ }
+ else if (one_in_the_middle)
+ me.zoomFactor = 1; // snap to real dimensions
+ else if (initialZoom_in_the_middle)
+ me.zoomFactor = me.initialForcedZoom; // snap to box
+ }
+ else if (z == 0) // reset (no zoom)
+ {
+ if (me.initialForcedZoom > 0)
+ me.zoomFactor = me.initialForcedZoom;
+ else
+ me.zoomFactor = 1;
+ }
+ else // directly set
+ me.zoomFactor = z;
+ me.zoomFactor = bound(1/16, me.zoomFactor, 16);
+ if (prev_zoomFactor != me.zoomFactor)
+ {
+ me.zoomTime = time;
+ if (atMousePosition)
+ {
+ me.zoomOffset_x = me.start_zoomOffset_x + (me.start_coords_x - 0.5) / me.imgSize_x;
+ me.zoomOffset_y = me.start_zoomOffset_y + (me.start_coords_y - 0.5) / me.imgSize_y;
+ // updateAspect will reset however zoomOffset to '0.5 0.5 0' if with
+ // this zoomFactor the image will not be zoomed (updateAspect will check
+ // the new values of imgSize).
+ }
+ }
+ me.updateAspect(me);