89 lines
3.1 KiB
Kotlin
89 lines
3.1 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.draw.loadFont
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import org.openrndr.extra.color.presets.DARK_CYAN
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import org.openrndr.extra.shapes.adjust.adjustContour
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import org.openrndr.extra.shapes.adjust.extensions.averageTangents
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import org.openrndr.extra.shapes.adjust.extensions.switchTangents
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import org.openrndr.extra.shapes.tunni.tunniLine
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import org.openrndr.extra.shapes.tunni.tunniPoint
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import kotlin.math.sqrt
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/**
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* Demonstrates how to manipulate a contour by adjusting and transforming its vertices
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* and edges, and subsequently visualizing the result using different drawing styles.
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*
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* The program creates a rectangular contour derived by shrinking the bounds of the drawing area.
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* It then applies multiple transformations to selected vertices. These transformations include:
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*
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* - Averaging tangents for selected vertices
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* - Scaling and rotating vertex positions based on the horizontal mouse position
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* - Switching tangents for specific vertices
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*
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* The resulting contour is drawn in black. Additionally:
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*
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* - Control line segments are visualized in red, connecting segment endpoints to control points.
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* - Vertices are numbered and highlighted with black-filled circles.
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* - Tunni lines, which represent optimized control line placements, are visualized in cyan.
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* - Tunni points, marking the Tunni line's control, are emphasized with yellow-filled circles.
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*
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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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val font = loadFont("demo-data/fonts/IBMPlexMono-Regular.ttf", 16.0)
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extend {
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drawer.clear(ColorRGBa.WHITE)
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drawer.fontMap = font
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var contour = drawer.bounds.offsetEdges(-200.0).contour
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drawer.fill = null
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contour = adjustContour(contour) {
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selectVertices(0, 1)
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for (v in vertices) {
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v.averageTangents()
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v.scale(sqrt(2.0))
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v.rotate(mouse.position.x - 45.0)
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}
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selectVertices(2)
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for (v in vertices) {
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v.switchTangents()
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}
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}
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drawer.stroke = ColorRGBa.BLACK
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drawer.contour(contour)
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drawer.stroke = ColorRGBa.RED
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for (s in contour.segments) {
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drawer.lineSegment(s.start, s.cubic.control[0])
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drawer.lineSegment(s.end, s.cubic.control[1])
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}
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// Draw points and numbers
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drawer.fill = ColorRGBa.BLACK
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drawer.stroke = null
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contour.segments.forEachIndexed { i, it ->
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drawer.text(i.toString(), it.start + 10.0)
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drawer.circle(it.start, 5.0)
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}
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drawer.fill = ColorRGBa.YELLOW
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drawer.stroke = ColorRGBa.CYAN
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for (s in contour.segments) {
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drawer.strokeWeight = 3.0
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drawer.lineSegment(s.tunniLine)
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drawer.strokeWeight = 1.0
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drawer.circle(s.tunniPoint, 5.0)
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}
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}
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}
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}
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