42 lines
1.2 KiB
Kotlin
42 lines
1.2 KiB
Kotlin
package adjust
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import org.openrndr.application
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import org.openrndr.color.ColorRGBa
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import org.openrndr.extra.shapes.adjust.adjustContour
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import org.openrndr.math.Vector2
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import org.openrndr.shape.Circle
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import kotlin.math.cos
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import kotlin.math.sin
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/**
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* Demonstrates how to use `adjustContour` to select and modify three vertices
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* in a circular contour. In OPENRNDR circles contain 4 cubic bézier
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* segments connecting 4 vertices.
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*
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* On every animation frame the circular contour is created and transformed
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* using sines, cosines and the variable `seconds` for an animated effect.
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*/
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fun main() = application {
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configure {
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width = 800
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height = 800
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}
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program {
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extend {
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var contour = Circle(drawer.bounds.center, 300.0).contour
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contour = adjustContour(contour) {
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selectVertex(0)
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vertex.moveBy(Vector2(cos(seconds) * 40.0, sin(seconds * 0.43) * 40.0))
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selectVertex(2)
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vertex.rotate(seconds * 45.0)
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selectVertex(1)
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vertex.scale(cos(seconds * 0.943) * 2.0)
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}
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drawer.stroke = ColorRGBa.RED
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drawer.contour(contour)
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}
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}
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}
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