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[orx-shapes] Comment the ContourAdjuster and its demos

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Abe Pazos
2025-08-29 13:00:27 +02:00
parent c531c45608
commit 2e6c637b49
9 changed files with 248 additions and 33 deletions
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40
orx-shapes/src/jvmDemo/kotlin/adjust/DemoAdjustContour09.kt
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@@ -2,6 +2,8 @@ package adjust
import org.openrndr.application
import org.openrndr.color.ColorRGBa
import org.openrndr.draw.loadFont
import org.openrndr.extra.color.presets.DARK_CYAN
import org.openrndr.extra.shapes.adjust.adjustContour
import org.openrndr.extra.shapes.adjust.extensions.averageTangents
import org.openrndr.extra.shapes.adjust.extensions.switchTangents
@@ -9,14 +11,36 @@ import org.openrndr.extra.shapes.tunni.tunniLine
import org.openrndr.extra.shapes.tunni.tunniPoint
import kotlin.math.sqrt
/**
* Demonstrates how to manipulate a contour by adjusting and transforming its vertices
* and edges, and subsequently visualizing the result using different drawing styles.
*
* The program creates a rectangular contour derived by shrinking the bounds of the drawing area.
* It then applies multiple transformations to selected vertices. These transformations include:
*
* - Averaging tangents for selected vertices
* - Scaling and rotating vertex positions based on the horizontal mouse position
* - Switching tangents for specific vertices
*
* The resulting contour is drawn in black. Additionally:
*
* - Control line segments are visualized in red, connecting segment endpoints to control points.
* - Vertices are numbered and highlighted with black-filled circles.
* - Tunni lines, which represent optimized control line placements, are visualized in cyan.
* - Tunni points, marking the Tunni line's control, are emphasized with yellow-filled circles.
*
*/
fun main() = application {
configure {
width = 800
height = 800
}
program {
val font = loadFont("demo-data/fonts/IBMPlexMono-Regular.ttf", 16.0)
extend {
drawer.clear(ColorRGBa.WHITE)
drawer.fontMap = font
var contour = drawer.bounds.offsetEdges(-200.0).contour
drawer.fill = null
@@ -26,7 +50,7 @@ fun main() = application {
for (v in vertices) {
v.averageTangents()
v.scale(sqrt(2.0))
v.rotate(45.0)
v.rotate(mouse.position.x - 45.0)
}
selectVertices(2)
@@ -38,19 +62,25 @@ fun main() = application {
drawer.contour(contour)
drawer.stroke = ColorRGBa.RED
for (s in contour.segments) {
drawer.lineSegment(s.start, s.cubic.control[0])
drawer.lineSegment(s.end, s.cubic.control[1])
}
// Draw points and numbers
drawer.fill = ColorRGBa.BLACK
drawer.stroke = null
drawer.circles(contour.segments.map { it.start }, 5.0)
contour.segments.forEachIndexed { i, it ->
drawer.text(i.toString(), it.start + 10.0)
drawer.circle(it.start, 5.0)
}
drawer.stroke = ColorRGBa.GRAY
drawer.fill = ColorRGBa.YELLOW
drawer.stroke = ColorRGBa.CYAN
for (s in contour.segments) {
drawer.strokeWeight = 3.0
drawer.lineSegment(s.tunniLine)
drawer.fill = ColorRGBa.CYAN
drawer.strokeWeight = 1.0
drawer.circle(s.tunniPoint, 5.0)
}
}