I have a SVG,
Im trying to get collision working like
The script im using to allow the white box to move,
<script type="text/javascript"><![CDATA[
function makeDraggable(evt) {
var svg = evt.target;
svg.addEventListener('mousedown', startDrag);
svg.addEventListener('mousemove', drag);
svg.addEventListener('mouseup', endDrag);
svg.addEventListener('mouseleave', endDrag);
svg.addEventListener('touchstart', startDrag);
svg.addEventListener('touchmove', drag);
svg.addEventListener('touchend', endDrag);
svg.addEventListener('touchleave', endDrag);
svg.addEventListener('touchcancel', endDrag);
var selectedElement, offset, transform,
bbox, minX, maxX, minY, maxY, confined;
var boundaryX1 = 27;
var boundaryX2 = 203;
var boundaryY1 = 17;
var boundaryY2 = 437;
function getMousePosition(evt) {
var CTM = svg.getScreenCTM();
if (evt.touches) { evt = evt.touches[0]; }
return {
x: (evt.clientX - CTM.e) / CTM.a,
y: (evt.clientY - CTM.f) / CTM.d
};
}
function startDrag(evt) {
if (evt.target.classList.contains('draggable')) {
selectedElement = evt.target;
offset = getMousePosition(evt);
// Make sure the first transform on the element is a translate transform
var transforms = selectedElement.transform.baseVal;
if (transforms.length === 0 || transforms.getItem(0).type !== SVGTransform.SVG_TRANSFORM_TRANSLATE) {
// Create an transform that translates by (0, 0)
var translate = svg.createSVGTransform();
translate.setTranslate(0, 0);
selectedElement.transform.baseVal.insertItemBefore(translate, 0);
}
// Get initial translation
transform = transforms.getItem(0);
offset.x -= transform.matrix.e;
offset.y -= transform.matrix.f;
confined = evt.target.classList.contains('confine');
if (confined) {
bbox = selectedElement.getBBox();
minX = boundaryX1 - bbox.x;
maxX = boundaryX2 - bbox.x - bbox.width;
minY = boundaryY1 - bbox.y;
maxY = boundaryY2 - bbox.y - bbox.height;
}
}
}
function drag(evt) {
if (selectedElement) {
evt.preventDefault();
var coord = getMousePosition(evt);
var dx = coord.x - offset.x;
var dy = coord.y - offset.y;
if (confined) {
if (dx < minX) { dx = minX; }
else if (dx > maxX) { dx = maxX; }
if (dy < minY) { dy = minY; }
else if (dy > maxY) { dy = maxY; }
}
transform.setTranslate(dx, (Math.round(dy / 10) * 10));
document.getElementById("x_coord").value = dx;
document.getElementById("y_coord").value = (Math.round(dy / 10) * 10);
document.getElementById("Beginning_ru").value = 42 - Math.floor(Math.round(dy / 10) + 1);
}
}
function endDrag(evt) {
selectedElement = false;
}
}
]]> </script>
I’m trying to get the rect to swap classes when a collision is detected
collision_detection.zip (2.2 KB)