我正在 D3 中创建一个图表。要求之一是我有一个矩形，它可以指向左侧或右侧，并且该矩形内应该有一个散列模式。使用填充图案很容易实现这一点。问题是我需要能够导出到 PowerPoint，它不支持这些模式。
相反，我创建了一个函数，它将在一组中添加主矩形形状以及一组表示散列模式的路径笔划。
剩下的唯一问题是散列模式不遵循主要形状的尖边。我需要以某种方式掩盖它们。
我不确定有什么好方法可以做到这一点。我考虑过某种线性插值，当路径笔划到达尖边时，可以缩放路径笔划的 X、Y 坐标，但我无法使其发挥作用。
这是一个 JSFiddle：https://jsfiddle.net/srose/4wmfsx35/1/。因此，在此示例中，绿色笔划不应出现在主要形状的红色边框之外。
有谁知道如何实现这一目标？
<!DOCTYPE html>
<!-- Add a svg area, empty -->
<svg id="area" height=500 width=500></svg>
<script>
function calculateStripyRectD(
x,
y,
width,
height,
stripeWidth,
isPointedLeft,
isPointedRight,
pointWidth
) {
const stripes = [];
for (let yTop = 0; yTop < height + width; yTop += 5 * stripeWidth) {
const yBottom = yTop + stripeWidth;
let stripeTopStartX = yTop > height ? x + (yTop - height) : x;
let stripeTopStartY = yTop > height ? y + height : y + yTop;
let stripeTopEndX = yTop > width ? x + width : x + yTop;
let stripeTopEndY = yTop > width ? y + yTop - width : y;
let stripe2startX = yBottom > height ? x + (yBottom - height) : x;
let stripe2startY = yBottom > height ? y + height : y + yBottom;
let stripe2endX = yBottom > width ? x + width : x + yBottom;
let stripe2endY = yBottom > width ? y + yBottom - width : y;
if (isPointedRight) {
/* const distanceFromRight = width - stripeTopStartX;
if (distanceFromRight < pointWidth) {
break;
} */
}
stripes.push(`M ${stripeTopStartX}, ${stripeTopStartY} L ${stripeTopEndX}, ${stripeTopEndY}
L ${stripe2endX}, ${stripe2endY} L ${stripe2startX}, ${stripe2startY}
L ${stripeTopStartX}, ${stripeTopStartY}
`);
}
return stripes
.join(' ')
}
function rectangleWithOptionalPoints(
width,
height,
isPointedLeft,
isPointedRight,
isStriped,
) {
const pointWidth = 20;
const stripeWidth = 1;
let leftX = 0;
let rightX = width;
if (isPointedLeft) {
leftX += pointWidth;
}
if (isPointedRight) {
rightX -= pointWidth;
}
const mainPath = `
M ${leftX - (isPointedLeft ? pointWidth : 0)} ${height / 2}
L ${leftX} 0
L ${rightX} 0
L ${rightX + (isPointedRight ? pointWidth : 0)} ${height / 2}
L ${rightX} ${height}
L ${leftX} ${height}
Z
`;
const stripes = isStriped ?
calculateStripyRectD(
leftX - pointWidth,
0,
width,
height,
stripeWidth,
isPointedLeft,
isPointedRight,
pointWidth
) :
undefined;
return {
main: mainPath,
stripes,
};
}
const renderBarGroup = () => {
const barGroup = svg.append('g')
barGroup
.append('path')
.attr('d', () => {
const paths = rectangleWithOptionalPoints(
200,
25,
true,
true,
true,
);
return paths.stripes;
})
.style('stroke', 'green');
barGroup
.append('path')
.attr('d', () => {
const paths = rectangleWithOptionalPoints(
200,
25,
true,
true,
true,
);
return paths.main;
})
.attr('fill', 'none')
.style('stroke', 'red');
};
var svg = d3.select("#area")
renderBarGroup();
</script>
谢谢！
您想对绿线应用
clip-path<svg id="area" height="500" width="500">
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M 0 12.5
L 20 0
L 180 0
L 200 12.5
L 180 25
L 20 25
Z
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</clipPath>
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" style="stroke: green;clip-path: url(#polygonClip)"></path><path d="
M 0 12.5
L 20 0
L 180 0
L 200 12.5
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Z
" fill="none" style="stroke: red;"></path></g></svg>