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Posted to commits@echarts.apache.org by GitBox <gi...@apache.org> on 2022/04/21 07:04:16 UTC
[GitHub] [echarts] wh2017 opened a new issue, #16925: [Bug] Radar area is not correct
wh2017 opened a new issue, #16925:
URL: https://github.com/apache/echarts/issues/16925
### Version
5.3.2
### Link to Minimal Reproduction
_No response_
### Steps to Reproduce
open the demo link:https://echarts.apache.org/examples/zh/editor.html?c=radar
replace the options
option = {
title: {
text: 'Basic Radar Chart'
},
legend: {
data: ['Actual Spending']
},
radar: {
indicator: [
{ name: '内分泌与代谢疾病' },
{ name: '免疫系统' },
{ name: '感染' },
{ name: '血液及淋巴系统' },
{ name: '肿瘤'},
{ name: '神经系统' }
],
radius: '50%'
},
series: [
{
name: 'Budget vs spending',
type: 'radar',
areaStyle: {
},
data: [
{
value: [0,2,0,3,2,0],
}
]
}
]
};
### Current Behavior
### Expected Behavior
### Environment
```markdown
- OS:
- Browser:
- Framework:
```
### Any additional comments?
_No response_
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[GitHub] [echarts] jiawulin001 commented on issue #16925: [Bug] Radar area is not correct
Posted by GitBox <gi...@apache.org>.
jiawulin001 commented on issue #16925:
URL: https://github.com/apache/echarts/issues/16925#issuecomment-1108001191
This is rather a Zrender issue than an Echarts issue. Zrender would have such issue when drawing a polygon with two edges overlapping.
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[GitHub] [echarts] echarts-bot[bot] commented on issue #16925: [Bug] Radar area is not correct
Posted by GitBox <gi...@apache.org>.
echarts-bot[bot] commented on issue #16925:
URL: https://github.com/apache/echarts/issues/16925#issuecomment-1104796029
@wh2017 It seems you are not using English, I've helped translate the content automatically. To make your issue understood by more people and get helped, we'd like to suggest using English next time. 🤗
<details><summary><b>TRANSLATED</b></summary><br>
**BODY**
### Version
5.3.2
### Link to Minimal Reproduction
_No response_
### Steps to Reproduce
open the demo link: https://echarts.apache.org/examples/en/editor.html?c=radar
replace the options
option = {
title: {
text: 'Basic Radar Chart'
},
legend: {
data: ['Actual Spending']
},
radar: {
indicator: [
{ name: 'Endocrine and Metabolic Diseases' },
{ name: 'immune system' },
{ name: 'infection' },
{ name: 'Blood and Lymphatic System' },
{ name: 'tumor'},
{ name: 'nervous system' }
],
radius: '50%'
},
series: [
{
name: 'Budget vs spending',
type: 'radar',
areaStyle: {
},
data: [
{
value: [0,2,0,3,2,0],
}
]
}
]
};
### Current Behavior
### Expected Behavior
### Environment
````markdown
- OS:
- Browser:
- Framework:
````
### Any additional comments?
_No response_
</details>
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Re: [I] [Bug] Radar area is not correct [echarts]
Posted by "helgasoft (via GitHub)" <gi...@apache.org>.
helgasoft commented on issue #16925:
URL: https://github.com/apache/echarts/issues/16925#issuecomment-1753601175
Workaround - usually when zero values create problems, we replace them with "near zero" values.
Also note _radar.indicator_ max values.
[Demo Code](https://echarts.apache.org/examples/en/editor.html?c=radar&code=HYLwvABADAdF_wIwG4CwAoA9gBwC4EtNgJIBvDCCAJwEMATGqgLgnPUsv2DvwGMbcmZhADaFDpVIRgNALYBTFgHJAoYqAwJUAzNoDg5QMdygIhjAfa6BR1yUAaCLJoAPJgGYIAX1PiJUmQuWBZRUDVroG-fQPt-ZhbWdo7O7BKs0nKKEEqA-IaAy-ZBljb2Ti4cbjHKgAIRgE22gFPKgNO2gC-6ASkh6eGRUe6xSoD9AYAkbpVpGRGu0R5xgHqegPN-FeapoQ6ZALo1HLQ8AK4AzsoArFAApEriHZTz8lT48ouimWy19coAQrN0AObyuBAAbvMQ89jy3FzXZpmUuACeb2UM0Y306HEY8hoAGV_gAbWInWoQXiYWFCJhKKjyOgbMGULaRBi4GgsMR4rI_SIAeipDxosNmsREUFMACZTCzbGyOZNKRI6QymaBucKuezQLzyfjKeNMmMIrL0A5kEA)
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[GitHub] [echarts] Ovilia commented on issue #16925: [Bug] Radar area is not correct
Posted by GitBox <gi...@apache.org>.
Ovilia commented on issue #16925:
URL: https://github.com/apache/echarts/issues/16925#issuecomment-1120167905
It seems to be a bug of Chrome. Tested with Safari and it works fine. It doesn't seem to be wrong with ZRender's source code.
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Re: [I] [Bug] Radar area is not correct [echarts]
Posted by "nieyuyao (via GitHub)" <gi...@apache.org>.
nieyuyao commented on issue #16925:
URL: https://github.com/apache/echarts/issues/16925#issuecomment-1825228938
I debugged the code to got the points that are drawn to the canvas.
```javascript
const canvas = document.getElementById('canvas')
const ctx = canvas.getContext('2d')
const points = [
[300, 300],
[196.0769515458674, 239.99999999999994],
[300, 300],
[299.99999999999994, 390],
[403.92304845413264, 360.0000],
[300, 300],
[300, 300],
]
ctx.beginPath()
ctx.moveTo(points[0][0], points[0][1])
ctx.lineTo(points[1][0], points[1][1])
ctx.lineTo(points[2][0], points[2][1])
ctx.lineTo(points[3][0], points[3][1])
ctx.lineTo(points[4][0], points[4][1])
ctx.lineTo(points[5][0], points[5][1])
ctx.lineTo(points[6][0], points[6][1])
ctx.closePath()
ctx.fillStyle = 'red'
ctx.fill()
```
**In Chrome**
<img width="200" alt="image" src="https://github.com/apache/echarts/assets/17698194/c64d8080-b7d2-4c6b-afae-29f432558b82">
**In FireFox**
<img width="200" alt="image" src="https://github.com/apache/echarts/assets/17698194/f403b221-e9d3-42a3-a4e9-6f7896ba6b0e">
**In Safari**
<img width="220" alt="image" src="https://github.com/apache/echarts/assets/17698194/764f7e4f-6cb3-4a9c-9d12-10a4d361440f">
It does seem to be a Chrome bug?
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Re: [I] [Bug] Radar area is not correct [echarts]
Posted by "Ovilia (via GitHub)" <gi...@apache.org>.
Ovilia commented on issue #16925:
URL: https://github.com/apache/echarts/issues/16925#issuecomment-1813933408
I'm not sure. I've dived into the code and didn't see anything wrong. Have to clue to fix this.
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Re: [I] [Bug] Radar area is not correct [echarts]
Posted by "MimiZhang11 (via GitHub)" <gi...@apache.org>.
MimiZhang11 commented on issue #16925:
URL: https://github.com/apache/echarts/issues/16925#issuecomment-1803259060
> It seems to be a bug of Chrome. Tested with Safari and it works fine. It doesn't seem to be wrong with ZRender's source code.
I don't think that's the reason, I also tried to find this error in Edge browser.
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