1 /*
2  * Copyright (C) 2023 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.egg.landroid
18 
19 import android.util.Log
20 import androidx.compose.ui.graphics.Path
21 import kotlin.math.cos
22 import kotlin.math.sin
23 
24 fun createPolygon(radius: Float, sides: Int): Path {
25     return Path().apply {
26         moveTo(radius, 0f)
27         val angleStep = PI2f / sides
28         for (i in 1 until sides) {
29             lineTo(radius * cos(angleStep * i), radius * sin(angleStep * i))
30         }
31         close()
32     }
33 }
34 
35 fun createStar(radius1: Float, radius2: Float, points: Int): Path {
36     return Path().apply {
37         val angleStep = PI2f / points
38         moveTo(radius1, 0f)
39         lineTo(radius2 * cos(angleStep * (0.5f)), radius2 * sin(angleStep * (0.5f)))
40         for (i in 1 until points) {
41             lineTo(radius1 * cos(angleStep * i), radius1 * sin(angleStep * i))
42             lineTo(radius2 * cos(angleStep * (i + 0.5f)), radius2 * sin(angleStep * (i + 0.5f)))
43         }
44         close()
45     }
46 }
47 
48 fun Path.parseSvgPathData(d: String) {
49     Regex("([A-Z])([-.,0-9e ]+)").findAll(d.trim()).forEach {
50         val cmd = it.groups[1]!!.value
51         val args =
52             it.groups[2]?.value?.split(Regex("\\s+"))?.map { v -> v.toFloat() } ?: emptyList()
53         Log.d("Landroid", "cmd = $cmd, args = " + args.joinToString(","))
54         when (cmd) {
55             "M" -> moveTo(args[0], args[1])
56             "C" -> cubicTo(args[0], args[1], args[2], args[3], args[4], args[5])
57             "L" -> lineTo(args[0], args[1])
58             "Z" -> close()
59             else -> Log.v("Landroid", "unsupported SVG command: $cmd")
60         }
61     }
62 }
63