PhysicalConnectivity/src/main/kotlin/net/shadowfacts/cacao/view/BezierCurveView.kt

package net.shadowfacts.cacao.view

import net.minecraft.client.util.math.MatrixStack
import net.shadowfacts.cacao.geometry.BezierCurve
import net.shadowfacts.cacao.geometry.Point
import net.shadowfacts.cacao.util.Color
import net.shadowfacts.cacao.util.RenderHelper

/**
 * @author shadowfacts
 */
class BezierCurveView(val curve: BezierCurve): View() {

	private val points by lazy {
		val step = 0.05
		var t = 0.0
		val points = mutableListOf<Point>()
		while (t <= 1) {
			points.add(curve.point(t))
			t += step
		}
		points
	}

	var lineWidth = 3f
	var lineColor = Color.BLACK

	override fun drawContent(matrixStack: MatrixStack, mouse: Point, delta: Float) {
		matrixStack.push()
		matrixStack.scale(bounds.width.toFloat(), bounds.height.toFloat(), 1f)
		for ((index, point) in points.withIndex()) {
			val next = points.getOrNull(index + 1) ?: break
			RenderHelper.drawLine(point, next, zIndex, lineWidth, lineColor)
		}
		matrixStack.pop()
	}

}