38 lines
1.2 KiB
Kotlin
38 lines
1.2 KiB
Kotlin
package org.openrndr.extra.shapes
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import org.openrndr.math.Polar
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import org.openrndr.math.Vector2
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import org.openrndr.math.transforms.buildTransform
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import org.openrndr.shape.Circle
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import org.openrndr.shape.Ellipse
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import org.openrndr.shape.ShapeContour
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import org.openrndr.shape.contour as buildContour
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/**
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* Convert [Circle] to [ShapeContour] with a number of segments equal to [segments]
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* @param segments the number of segments, at least 4
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*/
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fun Circle.contour(segments: Int): ShapeContour {
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return buildContour {
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val p = Polar(0.0, radius)
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moveTo(center + p.cartesian)
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for (i in 1 until segments+1) {
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val lp = Polar(i * 360.0/segments, radius).cartesian + center
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arcTo(radius, radius, 360.0/segments, false, true, lp.x, lp.y)
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}
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close()
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}
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}
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/**
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* Convert [Ellipse] to [ShapeContour] with a number of segments equal to [segments]
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* @param segments the number of segments, at least 4
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*/
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fun Ellipse.contour(segments: Int): ShapeContour {
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return Circle(Vector2.ZERO, xRadius).contour(segments).transform(
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buildTransform {
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translate(center)
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scale(1.0, yRadius/xRadius)
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}
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)
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} |