cornerstone-math
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Math and computation geometry functionality for cornerstone
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<a href="../index.html">all files</a> / <a href="index.html">src/</a> rect.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">import lineSegment from './lineSegment.js';
function rectToLineSegments (rect) <span class="fstat-no" title="function not covered" >{</span>
const top = <span class="cstat-no" title="statement not covered" >{</span>
start: {
x: rect.left,
y: rect.top
},
end: {
x: rect.left + rect.width,
y: rect.top
}
};
const right = <span class="cstat-no" title="statement not covered" >{</span>
start: {
x: rect.left + rect.width,
y: rect.top
},
end: {
x: rect.left + rect.width,
y: rect.top + rect.height
}
};
const bottom = <span class="cstat-no" title="statement not covered" >{</span>
start: {
x: rect.left + rect.width,
y: rect.top + rect.height
},
end: {
x: rect.left,
y: rect.top + rect.height
}
};
const left = <span class="cstat-no" title="statement not covered" >{</span>
start: {
x: rect.left,
y: rect.top + rect.height
},
end: {
x: rect.left,
y: rect.top
}
};
const lineSegments = <span class="cstat-no" title="statement not covered" >[top, right, bottom, left];</span>
<span class="cstat-no" title="statement not covered" > return lineSegments;</span>
}
function distanceToPoint (rect, point) <span class="fstat-no" title="function not covered" >{</span>
let minDistance = <span class="cstat-no" title="statement not covered" >655535;</span>
const lineSegments = <span class="cstat-no" title="statement not covered" >rectToLineSegments(rect);</span>
<span class="cstat-no" title="statement not covered" > lineSegments.forEach(function (segment) <span class="fstat-no" title="function not covered" >{</span></span>
const distance = <span class="cstat-no" title="statement not covered" >lineSegment.distanceToPoint(segment, point);</span>
<span class="cstat-no" title="statement not covered" > if(distance < minDistance) {</span>
<span class="cstat-no" title="statement not covered" > minDistance = distance;</span>
}
});
<span class="cstat-no" title="statement not covered" > return minDistance;</span>
}
// Returns top-left and bottom-right points of the rectangle
function rectToPoints (rect) <span class="fstat-no" title="function not covered" >{</span>
const rectPoints = <span class="cstat-no" title="statement not covered" >{</span>
topLeft: {
x: rect.left,
y: rect.top
},
bottomRight: {
x: rect.left + rect.width,
y: rect.top + rect.height
}
};
<span class="cstat-no" title="statement not covered" > return rectPoints;</span>
}
// Returns whether two non-rotated rectangles are intersected
function doesIntersect (rect1, rect2) <span class="fstat-no" title="function not covered" >{</span>
let intersectLeftRight;
let intersectTopBottom;
const rect1Points = <span class="cstat-no" title="statement not covered" >rectToPoints(rect1);</span>
const rect2Points = <span class="cstat-no" title="statement not covered" >rectToPoints(rect2);</span>
<span class="cstat-no" title="statement not covered" > if (rect1.width >= 0) {</span>
<span class="cstat-no" title="statement not covered" > if (rect2.width >= 0) {</span>
<span class="cstat-no" title="statement not covered" > intersectLeftRight = !((rect1Points.bottomRight.x <= rect2Points.topLeft.x) || (rect2Points.bottomRight.x <= rect1Points.topLeft.x));</span>
} else {
<span class="cstat-no" title="statement not covered" > intersectLeftRight = !((rect1Points.bottomRight.x <= rect2Points.bottomRight.x) || (rect2Points.topLeft.x <= rect1Points.topLeft.x));</span>
}
} else <span class="cstat-no" title="statement not covered" >if (rect2.width >= 0) {</span>
<span class="cstat-no" title="statement not covered" > intersectLeftRight = !((rect1Points.topLeft.x <= rect2Points.topLeft.x) || (rect2Points.bottomRight.x <= rect1Points.bottomRight.x));</span>
} else {
<span class="cstat-no" title="statement not covered" > intersectLeftRight = !((rect1Points.topLeft.x <= rect2Points.bottomRight.x) || (rect2Points.topLeft.x <= rect1Points.bottomRight.x));</span>
}
<span class="cstat-no" title="statement not covered" > if (rect1.height >= 0) {</span>
<span class="cstat-no" title="statement not covered" > if (rect2.height >= 0) {</span>
<span class="cstat-no" title="statement not covered" > intersectTopBottom = !((rect1Points.bottomRight.y <= rect2Points.topLeft.y) || (rect2Points.bottomRight.y <= rect1Points.topLeft.y));</span>
} else {
<span class="cstat-no" title="statement not covered" > intersectTopBottom = !((rect1Points.bottomRight.y <= rect2Points.bottomRight.y) || (rect2Points.topLeft.y <= rect1Points.topLeft.y));</span>
}
} else <span class="cstat-no" title="statement not covered" >if (rect2.height >= 0) {</span>
<span class="cstat-no" title="statement not covered" > intersectTopBottom = !((rect1Points.topLeft.y <= rect2Points.topLeft.y) || (rect2Points.bottomRight.y <= rect1Points.bottomRight.y));</span>
} else {
<span class="cstat-no" title="statement not covered" > intersectTopBottom = !((rect1Points.topLeft.y <= rect2Points.bottomRight.y) || (rect2Points.top <= rect1Points.bottomRight.y));</span>
}
<span class="cstat-no" title="statement not covered" > return intersectLeftRight && intersectTopBottom;</span>
}
// Returns intersection points of two non-rotated rectangles
function getIntersectionRect (rect1, rect2) <span class="fstat-no" title="function not covered" >{</span>
const intersectRect = <span class="cstat-no" title="statement not covered" >{</span>
topLeft: {},
bottomRight: {}
};
<span class="cstat-no" title="statement not covered" > if (!doesIntersect(rect1, rect2)) {</span>
<span class="cstat-no" title="statement not covered" > return;</span>
}
const rect1Points = <span class="cstat-no" title="statement not covered" >rectToPoints(rect1);</span>
const rect2Points = <span class="cstat-no" title="statement not covered" >rectToPoints(rect2);</span>
<span class="cstat-no" title="statement not covered" > if (rect1.width >= 0) {</span>
<span class="cstat-no" title="statement not covered" > if (rect2.width >= 0) {</span>
<span class="cstat-no" title="statement not covered" > intersectRect.topLeft.x = Math.max(rect1Points.topLeft.x, rect2Points.topLeft.x);</span>
<span class="cstat-no" title="statement not covered" > intersectRect.bottomRight.x = Math.min(rect1Points.bottomRight.x, rect2Points.bottomRight.x);</span>
} else {
<span class="cstat-no" title="statement not covered" > intersectRect.topLeft.x = Math.max(rect1Points.topLeft.x, rect2Points.bottomRight.x);</span>
<span class="cstat-no" title="statement not covered" > intersectRect.bottomRight.x = Math.min(rect1Points.bottomRight.x, rect2Points.topLeft.x);</span>
}
} else <span class="cstat-no" title="statement not covered" >if (rect2.width >= 0) {</span>
<span class="cstat-no" title="statement not covered" > intersectRect.topLeft.x = Math.min(rect1Points.topLeft.x, rect2Points.bottomRight.x);</span>
<span class="cstat-no" title="statement not covered" > intersectRect.bottomRight.x = Math.max(rect1Points.bottomRight.x, rect2Points.topLeft.x);</span>
} else {
<span class="cstat-no" title="statement not covered" > intersectRect.topLeft.x = Math.min(rect1Points.topLeft.x, rect2Points.topLeft.x);</span>
<span class="cstat-no" title="statement not covered" > intersectRect.bottomRight.x = Math.max(rect1Points.bottomRight.x, rect2Points.bottomRight.x);</span>
}
<span class="cstat-no" title="statement not covered" > if (rect1.height >= 0) {</span>
<span class="cstat-no" title="statement not covered" > if (rect2.height >= 0) {</span>
<span class="cstat-no" title="statement not covered" > intersectRect.topLeft.y = Math.max(rect1Points.topLeft.y, rect2Points.topLeft.y);</span>
<span class="cstat-no" title="statement not covered" > intersectRect.bottomRight.y = Math.min(rect1Points.bottomRight.y, rect2Points.bottomRight.y);</span>
} else {
<span class="cstat-no" title="statement not covered" > intersectRect.topLeft.y = Math.max(rect1Points.topLeft.y, rect2Points.bottomRight.y);</span>
<span class="cstat-no" title="statement not covered" > intersectRect.bottomRight.y = Math.min(rect1Points.bottomRight.y, rect2Points.topLeft.y);</span>
}
} else <span class="cstat-no" title="statement not covered" >if (rect2.height >= 0) {</span>
<span class="cstat-no" title="statement not covered" > intersectRect.topLeft.y = Math.min(rect1Points.topLeft.y, rect2Points.bottomRight.y);</span>
<span class="cstat-no" title="statement not covered" > intersectRect.bottomRight.y = Math.max(rect1Points.bottomRight.y, rect2Points.topLeft.y);</span>
} else {
<span class="cstat-no" title="statement not covered" > intersectRect.topLeft.y = Math.min(rect1Points.topLeft.y, rect2Points.topLeft.y);</span>
<span class="cstat-no" title="statement not covered" > intersectRect.bottomRight.y = Math.max(rect1Points.bottomRight.y, rect2Points.bottomRight.y);</span>
}
// Returns top-left and bottom-right points of intersected rectangle
<span class="cstat-no" title="statement not covered" > return intersectRect;</span>
}
const rect = {
distanceToPoint,
getIntersectionRect
};
export default rect;
</pre></td></tr>
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