53 lines
1.9 KiB
Kotlin
53 lines
1.9 KiB
Kotlin
package rseq
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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.rsequence.rSeq3D
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import org.openrndr.extra.noise.rsequence.rSeq4D
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import org.openrndr.math.Vector3
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import org.openrndr.math.Vector4
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import kotlin.math.abs
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import kotlin.math.min
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/**
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* Demo that presents a 3D visualization of points distributed using a 4D quasirandom sequence (R4).
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* Each point is represented as a sphere with it position and color derived from the sequence values.
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*
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* This function performs the following tasks:
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* - Configures the application window dimensions to 720x720 pixels.
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* - Initializes a 3D camera for orbital navigation of the scene.
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* - Generates 10,000 points in 4D space using the `rSeq4D` function. The points are scaled
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* and transformed into 3D positions with an additional w-coordinate for color variation.
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* - Creates a reusable sphere mesh for rendering.
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* - Renders each point as a sphere with its position determined by the 3D coordinates
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* of the point and its color calculated by shifting the hue of a base color using
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* the w-coordinate value.
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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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val points = (0 until 10000).map {
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(rSeq4D(it) - 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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extend(Orbital())
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extend {
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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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