c8f7dd52c6
- Adjust some demo window sizes. - Replace Random.double by Double.uniform - Tweak some demos so screenshots look more interesting
73 lines
2.6 KiB
Kotlin
73 lines
2.6 KiB
Kotlin
package bezierpatch
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import org.openrndr.WindowMultisample
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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.camera.Orbital
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import org.openrndr.extra.shapes.bezierpatches.bezierPatch
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import org.openrndr.math.Vector3
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import org.openrndr.shape.Segment3D
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/**
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* Shows how to
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* - create a [bezierPatch] out of 4 [Segment3D]
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* - create a sub-patch out of a [bezierPatch]
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* - create horizontal and vertical [Path3D]s out of [bezierPatch]es
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* - add colors to a [bezierPatch]
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* - draw a [bezierPatch] surface
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*
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* The created contours are horizontal and vertical in "bezier-patch space" but
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* are rendered deformed following the shape of the bezier patch.
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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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multisample = WindowMultisample.SampleCount(8)
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}
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program {
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val c0 = Segment3D(Vector3(-5.0, 0.0, -9.0), Vector3(5.0, 0.0, -9.0))
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val c1 = Segment3D(Vector3(-5.0, -5.0, -3.0), Vector3(5.0, -5.0, -3.0))
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val c2 = Segment3D(Vector3(-5.0, 5.0, 3.0), Vector3(5.0, 5.0, 3.0))
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val c3 = Segment3D(Vector3(-5.0, 0.0, 9.0), Vector3(5.0, 0.0, 9.0))
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val col = listOf(ColorRGBa.PINK, ColorRGBa.RED, ColorRGBa.BLUE, ColorRGBa.PINK)
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val cols = listOf(col, col, col, col)
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val bp = bezierPatch(c0, c1, c2, c3).withColors(cols)
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val bpSub = bp.sub(0.1, 0.1, 0.6, 0.6)
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val cam = Orbital()
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extend(cam) {
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eye = Vector3(x = 9.9, y = 12.8, z = 6.9)
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lookAt = Vector3(x = 1.6, y = -1.9, z = 1.2)
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}
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extend {
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drawer.clear(ColorRGBa.PINK)
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drawer.translate(-5.0, 0.0, 0.0)
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// Show the segments that form the bezier patch
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drawer.stroke = ColorRGBa.YELLOW
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drawer.strokeWeight = 50.0
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drawer.segments(listOf(c0, c1, c2, c3))
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// Show the grid
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drawer.strokeWeight = 1.0
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val n = 10
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for (i in 0..n) {
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drawer.stroke = ColorRGBa.BLACK
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drawer.lineStrip(bp.horizontal(i / n.toDouble()).adaptivePositions(0.01))
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drawer.lineStrip(bp.vertical(i / n.toDouble()).adaptivePositions(0.01))
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drawer.stroke = ColorRGBa.RED
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drawer.lineStrip(bpSub.horizontal(i / n.toDouble()).adaptivePositions(0.01))
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drawer.lineStrip(bpSub.vertical(i / n.toDouble()).adaptivePositions(0.01))
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}
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// Draw the colored Bezier surface
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drawer.translate(10.0, 0.0, 0.0)
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drawer.bezierPatch(bp)
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}
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}
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}
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