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166 lines
5.4 KiB
166 lines
5.4 KiB
package com.example.acapendulum20.canvas
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import android.content.Context
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import android.graphics.Canvas
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import android.graphics.Color
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import android.graphics.Paint
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import android.util.AttributeSet
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import android.view.View
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import kotlinx.coroutines.delay
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import kotlin.math.*
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class CanvasPendulum @JvmOverloads constructor(
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context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
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) : View(context, attrs, defStyleAttr) {
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private val paint: Paint = Paint()
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private lateinit var canvas: Canvas
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private val mPendulum: Pendulum = Pendulum()
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override fun onDraw(canvas: Canvas?) {
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super.onDraw(canvas)
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//if canvas not NULL then this canvas = it
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canvas?.let {
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this.canvas = it
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}
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//println("ONDRAW")
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//draw line
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mPendulum.startPosition.x = (width / 2).toFloat()
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paint.isAntiAlias = true
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paint.style = Paint.Style.STROKE
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paint.color = Color.RED
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paint.strokeWidth = 10f
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this.canvas.drawLine(
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mPendulum.startPosition.x,
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mPendulum.startPosition.y,
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mPendulum.stopPosition.x,
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mPendulum.stopPosition.y,
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paint
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)
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//draw circle
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paint.style = Paint.Style.FILL_AND_STROKE
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paint.strokeWidth = 1f
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paint.color = Color.GRAY
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canvas?.drawCircle(
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mPendulum.stopPosition.x,
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mPendulum.stopPosition.y,
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mPendulum.ballr,
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paint
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)
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//draw sensor left
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paint.style = Paint.Style.FILL_AND_STROKE
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paint.strokeWidth = 1f
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paint.color = Color.RED
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if (mPendulum.angleVelocity > 0) {
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if (mPendulum.stopPosition.x < (width / 3) - 30f && mPendulum.stopPosition.x + 30 > (width / 3) - 30f - mPendulum.ballr) {
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paint.style = Paint.Style.FILL_AND_STROKE
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paint.strokeWidth = 10f
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paint.color = Color.GREEN
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}
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}
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canvas?.drawCircle((width / 3).toFloat(), 910f, 30f, paint)
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//draw sensor right
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paint.style = Paint.Style.FILL_AND_STROKE
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paint.strokeWidth = 1f
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paint.color = Color.RED
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if (mPendulum.angleVelocity < 0) {
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if (mPendulum.stopPosition.x > (width / 1.5) - 30f && mPendulum.stopPosition.x + 30 < (width / 1.5) + 30f + mPendulum.ballr) {
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paint.style = Paint.Style.FILL_AND_STROKE
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paint.strokeWidth = 10f
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paint.color = Color.GREEN
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}
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}
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canvas?.drawCircle((width / 1.5).toFloat(), 910f, 30f, paint)
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startPendulum()
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invalidate()
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}
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fun startPendulum() {
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if (mPendulum.magneticField) {
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var gravity = 0.981f
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var damping = 0.996f
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if (mPendulum.stopPosition.x > canvas.width / 4f && mPendulum.stopPosition.x <= canvas.width * 0.75f) {
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gravity = 1.981f
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if (mPendulum.stopPosition.x > canvas.width / 3.toFloat() && mPendulum.stopPosition.x <= canvas.width / 1.5.toFloat()) {
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gravity = 2.981f
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if (mPendulum.stopPosition.x >= canvas.width / 2.toFloat() - 3 && mPendulum.stopPosition.x <= canvas.width / 2.toFloat() + 3) {
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damping = 0.3f
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}
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}
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}
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mPendulum.angleAcceleration =
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((-1 * gravity / mPendulum.r) * (mPendulum.angle)).toFloat()
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mPendulum.angleVelocity += mPendulum.angleAcceleration
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mPendulum.angleVelocity *= damping
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mPendulum.angle += mPendulum.angleVelocity
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//Polar to cartesian conversion
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mPendulum.stopPosition.x = mPendulum.r * (sin(mPendulum.angle)).toFloat()
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mPendulum.stopPosition.y = mPendulum.r * (cos(mPendulum.angle)).toFloat()
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//Origin transition
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mPendulum.stopPosition.x += mPendulum.startPosition.x
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}
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if (!mPendulum.magneticField) {
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val gravity = 0.981f
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val damping = 0.996f
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mPendulum.angleAcceleration =
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((-1 * gravity / mPendulum.r) * (mPendulum.angle)).toFloat()
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mPendulum.angleVelocity += mPendulum.angleAcceleration
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mPendulum.angleVelocity *= damping
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mPendulum.angle += mPendulum.angleVelocity
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//Polar to cartesian conversion
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mPendulum.stopPosition.x = mPendulum.r * (sin(mPendulum.angle)).toFloat()
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mPendulum.stopPosition.y = mPendulum.r * (cos(mPendulum.angle)).toFloat()
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//Origin transition
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mPendulum.stopPosition.x += mPendulum.startPosition.x
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}
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}
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fun startMagnet(magnet: Boolean) {
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mPendulum.magneticField = magnet
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}
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fun stopMagnet(magnet: Boolean) {
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mPendulum.magneticField = magnet
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}
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fun getVelocity(): Double {
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var currentVelocity = mPendulum.angleVelocity * 1000
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val roundoff = (currentVelocity * 100.0).roundToInt() / 100.0
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return abs(roundoff)
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}
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}
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class Position(var x: Float, var y: Float) {
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}
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class Pendulum {
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var startPosition: Position = Position(0f, 0f)
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var stopPosition: Position = Position(0f, 0f)
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var r = 800f
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//PI/6 Max ausschwingen
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var angle: Double = Math.PI / 12
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var angleVelocity: Float = 0.0f //
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var angleAcceleration: Float = 0.0f //
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var ballr: Float = 70.0f //
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var magneticField: Boolean = false
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}
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