Created
July 9, 2022 16:56
-
-
Save Debdutta-Panda/eece61f403050c1cc30d3aca69d8b625 to your computer and use it in GitHub Desktop.
Flower on jetpack compose canvas
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import android.os.Bundle | |
| import androidx.activity.ComponentActivity | |
| import androidx.activity.compose.setContent | |
| import androidx.compose.foundation.Canvas | |
| import androidx.compose.foundation.layout.Box | |
| import androidx.compose.foundation.layout.Column | |
| import androidx.compose.foundation.layout.fillMaxSize | |
| import androidx.compose.foundation.layout.padding | |
| import androidx.compose.material.Slider | |
| import androidx.compose.material.Surface | |
| import androidx.compose.runtime.* | |
| import androidx.compose.ui.Alignment | |
| import androidx.compose.ui.Modifier | |
| import androidx.compose.ui.geometry.Offset | |
| import androidx.compose.ui.graphics.Color | |
| import androidx.compose.ui.graphics.PointMode | |
| import androidx.compose.ui.layout.onGloballyPositioned | |
| import androidx.compose.ui.unit.IntSize | |
| import androidx.compose.ui.unit.dp | |
| import com.debduttapanda.jetpackcomposecoil.ui.theme.JetpackComposeCoilTheme | |
| import java.lang.Math.* | |
| class MainActivity : ComponentActivity() { | |
| override fun onCreate(savedInstanceState: Bundle?) { | |
| super.onCreate(savedInstanceState) | |
| setContent { | |
| JetpackComposeCoilTheme { | |
| // A surface container using the 'background' color from the theme | |
| Surface( | |
| modifier = Modifier.fillMaxSize(), | |
| color = Color.Black | |
| ) { | |
| var radius by remember { mutableStateOf(130f) } | |
| var endAngle by remember { mutableStateOf(360f) } | |
| var stepAngle by remember { mutableStateOf(0.01f) } | |
| var size by remember { mutableStateOf(IntSize.Zero) } | |
| Box( | |
| modifier = Modifier | |
| .fillMaxSize() | |
| .onGloballyPositioned { | |
| size = it.size | |
| } | |
| ){ | |
| Canvas( | |
| modifier = Modifier.fillMaxSize() | |
| ){ | |
| val end = endAngle | |
| var v = 0f | |
| val d = stepAngle | |
| val points1 = mutableListOf<Offset>() | |
| val points2 = mutableListOf<Offset>() | |
| val points3 = mutableListOf<Offset>() | |
| while(v<=end){ | |
| v += d | |
| val j = v* PI/180f | |
| val r1 = radius*f1(j) | |
| points1.add( | |
| Offset( | |
| r1.toFloat()*cos(j).toFloat()+size.width/2f, | |
| r1.toFloat()*sin(j).toFloat()+size.height/2f | |
| ) | |
| ) | |
| val r2 = radius*f2(j) | |
| points2.add( | |
| Offset( | |
| r2.toFloat()*cos(j).toFloat()+size.width/2f, | |
| r2.toFloat()*sin(j).toFloat()+size.height/2f | |
| ) | |
| ) | |
| val r3 = radius*f3(j) | |
| points3.add( | |
| Offset( | |
| r3.toFloat()*cos(j).toFloat()+size.width/2f, | |
| r3.toFloat()*sin(j).toFloat()+size.height/2f | |
| ) | |
| ) | |
| } | |
| drawPoints( | |
| points = points1, | |
| pointMode = PointMode.Lines, | |
| color = Color(0xff03fcd7), | |
| strokeWidth = 8f | |
| ) | |
| drawPoints( | |
| points = points2, | |
| pointMode = PointMode.Lines, | |
| color = Color(0xff03fc4e), | |
| strokeWidth = 8f | |
| ) | |
| drawPoints( | |
| points = points3, | |
| pointMode = PointMode.Lines, | |
| color = Color(0xfffca103), | |
| strokeWidth = 8f | |
| ) | |
| } | |
| Column( | |
| modifier = Modifier.align(Alignment.BottomCenter).padding(24.dp) | |
| ){ | |
| Slider( | |
| value = radius, | |
| valueRange = 0f..400f, | |
| onValueChange = { | |
| radius = it | |
| } | |
| ) | |
| Slider( | |
| value = endAngle, | |
| valueRange = 0f..360*1f, | |
| onValueChange = { | |
| endAngle = it | |
| } | |
| ) | |
| Slider( | |
| value = stepAngle, | |
| valueRange = 0.01f..1f, | |
| onValueChange = { | |
| stepAngle = it | |
| } | |
| ) | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| val π : Double | |
| get() = PI | |
| fun f1(Θ: Double): Double{ | |
| return 1+(((abs(cos(Θ*3)))+(0.25-(abs(cos(3*Θ+ π/2))))*2)/(2+abs(cos(6*Θ+π/2))*8)) | |
| } | |
| fun f2(Θ: Double): Double{ | |
| return 2+(((abs(cos(Θ*3)))+(0.25-(abs(cos(3*Θ+ π/2))))*2)/(2+abs(cos(6*Θ+π/2))*8)) | |
| } | |
| fun f3(Θ: Double): Double{ | |
| return 3+(((abs(cos(Θ*6)))+(0.25-(abs(cos(6*Θ+ π/2))))*2)/(2+abs(cos(12*Θ+π/2))*8)) | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment