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ohos-polygon.md 8.25 KB

# OHOS::Polygon<a name="EN-US_TOPIC_0000001055678124"></a>

## **Overview**<a name="section1036148264093535"></a>

**Related Modules:**

[Graphic](graphic.md)

**Description:**

Defines a polygon, including vertex coordinates and the maximum number of vertices \(defined by  [MAX\_VERTEX\_NUM](graphic.md#gafff78acb69e2b147b6f33d68e570ef54)\).

**Since:**

1.0

**Version:**

1.0

## **Summary**<a name="section1655935217093535"></a>

## Public Member Functions<a name="pub-methods"></a>

<a name="table62048988093535"></a>
<table><thead align="left"><tr id="row1223210378093535"><th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.1"><p id="p919311669093535"><a name="p919311669093535"></a><a name="p919311669093535"></a>Public Member Function Name</p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.2"><p id="p196759167093535"><a name="p196759167093535"></a><a name="p196759167093535"></a>Description</p>
</th>
</tr>
</thead>
<tbody><tr id="row558802088093535"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p152953427093535"><a name="p152953427093535"></a><a name="p152953427093535"></a><a href="graphic.md#ga56fa89b7be39ff928c8ad488bbaddac3">Polygon</a> ()</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1138407448093535"><a name="p1138407448093535"></a><a name="p1138407448093535"></a> </p>
<p id="p477893352093535"><a name="p477893352093535"></a><a name="p477893352093535"></a>The default constructor used to create a <strong id="b1984290111093535"><a name="b1984290111093535"></a><a name="b1984290111093535"></a><a href="ohos-polygon.md">Polygon</a></strong> instance. </p>
</td>
</tr>
<tr id="row200581441093535"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1248719159093535"><a name="p1248719159093535"></a><a name="p1248719159093535"></a><a href="graphic.md#gaa3be3f3605efe49629c024974e56da6a">Polygon</a> (const <a href="ohos-rect.md">Rect</a> &amp;rect)</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p153343368093535"><a name="p153343368093535"></a><a name="p153343368093535"></a> </p>
<p id="p62473801093535"><a name="p62473801093535"></a><a name="p62473801093535"></a>A constructor used to construct a <strong id="b5798851093535"><a name="b5798851093535"></a><a name="b5798851093535"></a><a href="ohos-polygon.md">Polygon</a></strong> instance based on a rectangle. </p>
</td>
</tr>
<tr id="row1988143677093535"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p727537098093535"><a name="p727537098093535"></a><a name="p727537098093535"></a><a href="graphic.md#ga54df053b5f430ed2ee7be14a898f668d">Polygon</a> (const <a href="ohos-vector2-t.md">Vector2</a>&lt; int16_t &gt; *vertexes, const uint8_t vertexNum)</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1722518395093535"><a name="p1722518395093535"></a><a name="p1722518395093535"></a> </p>
<p id="p1237825120093535"><a name="p1237825120093535"></a><a name="p1237825120093535"></a>A constructor used to create a <strong id="b365119075093535"><a name="b365119075093535"></a><a name="b365119075093535"></a><a href="ohos-polygon.md">Polygon</a></strong> instance based on the vertex coordinates and the number of coordinates. </p>
</td>
</tr>
<tr id="row500679881093535"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1874190897093535"><a name="p1874190897093535"></a><a name="p1874190897093535"></a><a href="graphic.md#gab27ef37ff8b5462c771aed96f58dcac6">~Polygon</a> ()</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p103286672093535"><a name="p103286672093535"></a><a name="p103286672093535"></a> </p>
<p id="p1412549172093535"><a name="p1412549172093535"></a><a name="p1412549172093535"></a>A destructor used to delete the <strong id="b1667695753093535"><a name="b1667695753093535"></a><a name="b1667695753093535"></a><a href="ohos-polygon.md">Polygon</a></strong> instance. </p>
</td>
</tr>
<tr id="row407324954093535"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p305466190093535"><a name="p305466190093535"></a><a name="p305466190093535"></a><a href="graphic.md#ga73295e4e05e9063082fb33b9847f4831">MakeAABB</a> () const</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p600880904093535"><a name="p600880904093535"></a><a name="p600880904093535"></a><a href="ohos-rect.md">Rect</a> </p>
<p id="p1154822389093535"><a name="p1154822389093535"></a><a name="p1154822389093535"></a>Obtains the minimum rectangle that can contain the polygon. All vertices of the polygon are inside this rectangle. </p>
</td>
</tr>
<tr id="row819681728093535"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1658515048093535"><a name="p1658515048093535"></a><a name="p1658515048093535"></a><a href="graphic.md#gaca0240aa7a65b24365064f296ff38a63">GetVertexNum</a> () const</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1483075577093535"><a name="p1483075577093535"></a><a name="p1483075577093535"></a>uint8_t </p>
<p id="p535005756093535"><a name="p535005756093535"></a><a name="p535005756093535"></a>Obtains the number of vertices of the polygon. </p>
</td>
</tr>
<tr id="row872853979093535"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1524496043093535"><a name="p1524496043093535"></a><a name="p1524496043093535"></a><a href="graphic.md#gad1990bc3055e0155d324479a2bb3baf1">SetVertexNum</a> (uint8_t vertexNum)</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1530045129093535"><a name="p1530045129093535"></a><a name="p1530045129093535"></a>void </p>
<p id="p819494776093535"><a name="p819494776093535"></a><a name="p819494776093535"></a>Sets the number of vertices of a polygon. </p>
</td>
</tr>
<tr id="row311117650093535"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p978028411093535"><a name="p978028411093535"></a><a name="p978028411093535"></a><a href="graphic.md#ga4854963aa969ee20a6cd174a70f5cd23">operator new</a> (size_t size)</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1469454637093535"><a name="p1469454637093535"></a><a name="p1469454637093535"></a>void * </p>
<p id="p836981622093535"><a name="p836981622093535"></a><a name="p836981622093535"></a>Overrides the <strong id="b1712016616093535"><a name="b1712016616093535"></a><a name="b1712016616093535"></a>new</strong> function. </p>
</td>
</tr>
<tr id="row1154965840093535"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1087651635093535"><a name="p1087651635093535"></a><a name="p1087651635093535"></a><a href="graphic.md#gadf1997a0f56ac2b220e7f0f8e8e0a6ef">operator delete</a> (void *p)</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p158357590093535"><a name="p158357590093535"></a><a name="p158357590093535"></a>void </p>
<p id="p1019327418093535"><a name="p1019327418093535"></a><a name="p1019327418093535"></a>Overrides the <strong id="b1905815272093535"><a name="b1905815272093535"></a><a name="b1905815272093535"></a>delete</strong> function. </p>
</td>
</tr>
</tbody>
</table>

## Static Public Attributes<a name="pub-static-attribs"></a>

<a name="table512421383093535"></a>
<table><thead align="left"><tr id="row203840695093535"><th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.1"><p id="p216566729093535"><a name="p216566729093535"></a><a name="p216566729093535"></a>Static Public Attribute Name</p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.2"><p id="p1428538334093535"><a name="p1428538334093535"></a><a name="p1428538334093535"></a>Description</p>
</th>
</tr>
</thead>
<tbody><tr id="row1245615898093535"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1904612563093535"><a name="p1904612563093535"></a><a name="p1904612563093535"></a><a href="graphic.md#gafff78acb69e2b147b6f33d68e570ef54">MAX_VERTEX_NUM</a> = 8</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 ">&nbsp;</td>
</tr>
</tbody>
</table>

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提交于 2020-09-08 10:08 . add OpenHarmony 1.0 baseline

OHOS::Polygon

Overview

Related Modules:

Description:

Defines a polygon, including vertex coordinates and the maximum number of vertices (defined by MAX_VERTEX_NUM).

Since:

1.0

Version:

1.0

Summary

Public Member Functions

Public Member Function Name	Description
Polygon ()	The default constructor used to create a Polygon instance.
Polygon (const Rect &rect)	A constructor used to construct a Polygon instance based on a rectangle.
Polygon (const Vector2< int16_t > *vertexes, const uint8_t vertexNum)	A constructor used to create a Polygon instance based on the vertex coordinates and the number of coordinates.
~Polygon ()	A destructor used to delete the Polygon instance.
MakeAABB () const	Rect Obtains the minimum rectangle that can contain the polygon. All vertices of the polygon are inside this rectangle.
GetVertexNum () const	uint8_t Obtains the number of vertices of the polygon.
SetVertexNum (uint8_t vertexNum)	void Sets the number of vertices of a polygon.
operator new (size_t size)	void * Overrides the new function.
operator delete (void *p)	void Overrides the delete function.

Static Public Attributes

Static Public Attribute Name	Description
MAX_VERTEX_NUM = 8

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