88 lines
2.9 KiB
Kotlin
88 lines
2.9 KiB
Kotlin
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.draw.DrawPrimitive
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import org.openrndr.draw.shadeStyle
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import org.openrndr.extra.camera.Orbital
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import org.openrndr.extra.meshgenerators.buildTriangleMesh
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import org.openrndr.extra.meshgenerators.extrudeContourStepsScaled
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import org.openrndr.extra.noise.Random
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import org.openrndr.math.Vector3
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import org.openrndr.shape.Circle
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import org.openrndr.shape.Path3D
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import org.openrndr.shape.Segment3D
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import kotlin.math.PI
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import kotlin.math.cos
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/**
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* Extruded Bézier tubes grown on a morphing Bézier surface.
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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 = 720
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height = 720
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multisample = WindowMultisample.SampleCount(8)
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}
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program {
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val crossSection = Circle(0.0, 0.0, 0.2).contour
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extend(Orbital()) {
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this.eye = Vector3(0.0, 3.0, 7.0)
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this.lookAt = Vector3(0.0, 0.0, 0.0)
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}
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extend {
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drawer.shadeStyle = shadeStyle {
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fragmentTransform = """
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x_fill = va_color;
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x_fill.rgb *= v_viewNormal.z;
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""".trimIndent()
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}
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val m = buildTriangleMesh {
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val beziers = List(4) { curveId ->
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val n = List(12) {
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Random.simplex(it * 7.387, curveId * 5.531 + seconds * 0.05) * 10.0
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}
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Segment3D(
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Vector3(n[0], n[1], n[2]),
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Vector3(n[3], n[4], n[5]),
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Vector3(n[6], n[7], n[8]),
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Vector3(n[9], n[10], n[11])
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)
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}
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for (i in 0 until 20) {
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val t = i / (20.0 - 1.0)
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val path = Path3D(
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listOf(
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Segment3D(
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beziers[0].position(t),
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beziers[1].position(t),
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beziers[2].position(t),
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beziers[3].position(t)
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)
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), false
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)
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color = if (i % 2 == 0) ColorRGBa.PINK else ColorRGBa.WHITE.shade(0.1)
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extrudeContourStepsScaled(
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crossSection,
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path,
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120,
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Vector3.UNIT_Y,
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contourDistanceTolerance = 0.05,
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pathDistanceTolerance = 0.05,
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scale = { tt: Double -> 0.5 - 0.5 * cos(tt * 2 * PI) }
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)
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}
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}
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drawer.vertexBuffer(m, DrawPrimitive.TRIANGLES)
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// Remember to free the memory! Otherwise, the computer will quickly run out of RAM.
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m.destroy()
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}
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}
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}
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