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[orx-shapes] Add simple hobbyCurve interfaces

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This commit is contained in:
Edwin Jakobs
2021-11-20 23:54:21 +01:00
parent 43b78954e5
commit 7ff626fa8a
1 changed files with 14 additions and 0 deletions
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14
orx-shapes/src/commonMain/kotlin/HobbyCurve.kt
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@@ -3,12 +3,25 @@ package org.openrndr.extra.shapes
import org.openrndr.math.Vector2 import org.openrndr.math.Vector2
import org.openrndr.shape.Segment import org.openrndr.shape.Segment
import org.openrndr.shape.Shape
import org.openrndr.shape.ShapeContour import org.openrndr.shape.ShapeContour
import kotlin.math.atan2 import kotlin.math.atan2
import kotlin.math.cos import kotlin.math.cos
import kotlin.math.sin import kotlin.math.sin
import kotlin.math.sqrt import kotlin.math.sqrt
fun ShapeContour.hobbyCurve() : ShapeContour {
val vertices = segments.map { it.start }
return hobbyCurve(vertices, closed)
}
fun Shape.hobbyCurve() : Shape {
return Shape(contours.map {
it.hobbyCurve()
})
}
/** /**
* Uses Hobby's algorithm to construct a [ShapeContour] through a given list of points. * Uses Hobby's algorithm to construct a [ShapeContour] through a given list of points.
* @param points The list of points through which the curve should go. * @param points The list of points through which the curve should go.
@@ -142,3 +155,4 @@ private fun rho(a: Double, b: Double): Double {
private fun rotate(v: Vector2, s: Double, c: Double) = Vector2(v.x * c - v.y * s, v.x * s + v.y * c) private fun rotate(v: Vector2, s: Double, c: Double) = Vector2(v.x * c - v.y * s, v.x * s + v.y * c)
private fun rotateAngle(v: Vector2, alpha: Double) = rotate(v, sin(alpha), cos(alpha)) private fun rotateAngle(v: Vector2, alpha: Double) = rotate(v, sin(alpha), cos(alpha))