48 lines
1.8 KiB
Kotlin
48 lines
1.8 KiB
Kotlin
package hammersley
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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.isolated
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import org.openrndr.extra.camera.Orbital
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import org.openrndr.extra.meshgenerators.sphereMesh
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import org.openrndr.extra.noise.hammersley.hammersley4D
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import org.openrndr.math.Vector4
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/**
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* Demo that visualizes a 4D Hammersley point set in a 3D space, with colors determined by the 4th dimension.
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*
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* The application is configured at a resolution of 720x720 pixels. A sphere mesh is created
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* using the `sphereMesh` utility, and a total of 10,000 4D points are generated with the
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* `hammersley4D` sequence. These points are scaled, translated, and rendered as small spheres.
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* The color of each sphere is modified based on the 4th dimension of its corresponding point by
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* shifting the hue in HSV color space.
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*
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* This program employs the `Orbital` extension, enabling camera interaction for 3D navigation
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* of the scene. Rendering occurs within the draw loop, providing continuous visualization
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* of the point distribution.
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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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}
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program {
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val sphere = sphereMesh(radius = 0.1)
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extend(Orbital())
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extend {
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val points = (0 until 10000).map {
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(hammersley4D(it, 10000) - Vector4(0.5, 0.5, 0.5, 0.0)) * Vector4(10.0, 10.0, 10.0, 1.0)
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}
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for (point in points) {
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drawer.isolated {
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drawer.translate(point.xyz)
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drawer.fill = ColorRGBa.RED.toHSVa().shiftHue(point.w * 360.0).toRGBa()
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drawer.vertexBuffer(sphere, DrawPrimitive.TRIANGLES)
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}
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}
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}
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}
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}
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