function onMouseMove(event) {
      if (ctrlDown) {
        if (drag.start.x === null) {
          drag.start.x = event.clientX;
          drag.start.y = event.clientY;
        }
        let threshold = 15;

        stackHelper.slice.intensityAuto = false;

        let dynamicRange = stack.minMax[1] - stack.minMax[0];
        dynamicRange /= threeD.clientWidth;

        if (Math.abs(event.clientX - drag.start.x) > threshold) {
          // window width
          stackHelper.slice.windowWidth += dynamicRange * (event.clientX - drag.start.x);
          drag.start.x = event.clientX;
        }

        if (Math.abs(event.clientY - drag.start.y) > threshold) {
          // window center
          stackHelper.slice.windowCenter -= dynamicRange * (event.clientY - drag.start.y);
          drag.start.y = event.clientY;
        }
      }
    }
function onMouseMove(event) {
      if (ctrlDown) {
        if (drag.start.x === null) {
          drag.start.x = event.clientX;
          drag.start.y = event.clientY;
        }
        let threshold = 15;

        stackHelper.slice.intensityAuto = false;

        let dynamicRange = stack.minMax[1] - stack.minMax[0];
        dynamicRange /= threeD.clientWidth;

        if (Math.abs(event.clientX - drag.start.x) > threshold) {
          
          stackHelper.slice.windowWidth += dynamicRange * (event.clientX - drag.start.x);
          drag.start.x = event.clientX;
        }

        if (Math.abs(event.clientY - drag.start.y) > threshold) {
          
          stackHelper.slice.windowCenter -= dynamicRange * (event.clientY - drag.start.y);
          drag.start.y = event.clientY;
        }
      }
    }
function onMouseMove ( event ) { if ( ctrlDown ) { if ( drag . start . x === null ) { drag . start . x = event . clientX ; drag . start . y = event . clientY ; } let threshold = 15 ; stackHelper . slice . intensityAuto = false ; let dynamicRange = stack . minMax [ 1 ] - stack . minMax [ 0 ] ; dynamicRange /= threeD . clientWidth ; if ( Math . abs ( event . clientX - drag . start . x ) > threshold ) { // window width stackHelper . slice . windowWidth += dynamicRange * ( event . clientX - drag . start . x ) ; drag . start . x = event . clientX ; } if ( Math . abs ( event . clientY - drag . start . y ) > threshold ) { // window center stackHelper . slice . windowCenter -= dynamicRange * ( event . clientY - drag . start . y ) ; drag . start . y = event . clientY ; } } }
On mouse move callback
On mouse move callback