79 lines
2.8 KiB
Kotlin
79 lines
2.8 KiB
Kotlin
package frames
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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.draw.DrawPrimitive
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import org.openrndr.draw.isolated
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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.cylinderMesh
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import org.openrndr.extra.noise.uniformRing
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import org.openrndr.extra.shapes.frames.frames
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import org.openrndr.extra.shapes.rectify.rectified
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import org.openrndr.math.Vector3
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import org.openrndr.shape.path3D
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import kotlin.random.Random
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/**
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* Demonstrates how to create a 3D path and attach cylinders to it at regular intervals with the correct orientation.
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*
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* - The path is constructed using the `path3D` builder.
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* - A rectified copy is created to be able to sample it at equal-length intervals.
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* - We call the `frames` method on the rectified contour to generate a list with 100 transformation matrices which
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* make it possible to attach oriented 3D objects at specific locations in the curve.
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* - We finally use the transformation matrices to draw cylinders along the 3D path.
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*
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* The orbital camera extension enables interactive 3D view manipulation.
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*
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* A fixed random seed is used to make sure this demo outputs a specific output. We can delete the
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* `random` arguments to get a unique result each time the program runs.
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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(4)
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}
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program {
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val random = Random(0)
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val cylinder = cylinderMesh(radius = 0.5, length = 0.1)
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val p = path3D {
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moveTo(0.0, 0.0, 0.0)
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curveTo(
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Vector3.uniformRing(0.1, 1.0, random = random) * 10.0,
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Vector3.uniformRing(0.1, 1.0, random = random) * 10.0,
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Vector3.uniformRing(0.1, 1.0, random = random) * 10.0
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)
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for (i in 0 until 10) {
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continueTo(
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Vector3.uniformRing(0.1, 1.0, random = random) * 10.0,
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Vector3.uniformRing(0.1, 1.0, random = random) * 10.0
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)
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}
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}
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val pr = p.rectified(0.01, 100.0)
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val frames = pr.frames((0 until 100).map { it / 100.0 }, Vector3.UNIT_Y, analyticalDirections = false)
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extend(Orbital())
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extend {
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drawer.shadeStyle = shadeStyle {
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fragmentTransform = """
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x_fill.rgb = vec3(abs(v_viewNormal.z)*0.9+ 0.1);
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""".trimIndent()
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}
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drawer.stroke = ColorRGBa.PINK
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drawer.path(p)
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for (frame in frames) {
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drawer.isolated {
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drawer.model = frame
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drawer.vertexBuffer(cylinder, 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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