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[orx-shapes] Add linear operator and contour conversion to bezierpatch

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This commit is contained in:
Edwin Jakobs
2020-10-16 21:31:06 +02:00
parent 16b7f0e230
commit b41ba5fdfc
1 changed files with 20 additions and 2 deletions
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22
orx-shapes/src/main/kotlin/BezierPatch.kt
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@@ -71,14 +71,14 @@ class BezierPatch(val points: List<List<Vector2>>) {
val f0 = List(4) { MutableList(3) { Vector2.ZERO } }
for (j in 0 until 4) {
for (i in 0 until 3) {
f0[j][i] = points[j][i+1] - points[j][i]
f0[j][i] = points[j][i + 1] - points[j][i]
}
}
val f1 = List(3) { MutableList(3) { Vector2.ZERO } }
for (j in 0 until 3) {
for (i in 0 until 3) {
f1[j][i] = f0[j+1][i] - f0[j][i]
f1[j][i] = f0[j + 1][i] - f0[j][i]
}
}
@@ -138,8 +138,26 @@ class BezierPatch(val points: List<List<Vector2>>) {
return bezierPatch(d0, d1, d2, d3).transposed
}
val contour: ShapeContour = ShapeContour(
listOf(
Segment(points[0][0], points[0][1], points[0][2], points[0][3]),
Segment(points[0][3], points[1][3], points[2][3], points[3][3]),
Segment(points[3][3], points[3][2], points[3][1], points[3][0]),
Segment(points[3][0], points[2][0], points[1][0], points[0][0]),
), true)
operator fun times(scale: Double) = BezierPatch(points.map { j -> j.map { i -> i * scale } })
operator fun div(scale: Double) = BezierPatch(points.map { j -> j.map { i -> i / scale } })
operator fun plus(right: BezierPatch) =
BezierPatch(List(4) { j -> List(4) { i -> points[j][i] + right.points[j][i] } })
operator fun minus(right: BezierPatch) =
BezierPatch(List(4) { j -> List(4) { i -> points[j][i] - right.points[j][i] } })
}
/**
* Create a cubic bezier patch from 4 segments. The control points of the segments are used in row-wise fashion
*/