96 lines
3.1 KiB
Kotlin
96 lines
3.1 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.extrudeContourAdaptive
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import org.openrndr.math.Polar
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import org.openrndr.math.Vector3
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import org.openrndr.math.asDegrees
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import org.openrndr.math.asRadians
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import org.openrndr.shape.Circle
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import org.openrndr.shape.Path3D
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import kotlin.math.PI
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import kotlin.math.exp
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fun main() {
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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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fun spiralPath(a: Double, k: Double, cycles: Double, steps: Int, direction:Double = 1.0): Path3D {
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val points = (0 until steps).map {
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val theta = ((PI * 2.0 * cycles) / steps) * it
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val radius = a * exp(k * theta)
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val c = Polar(theta.asDegrees, radius).cartesian
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c.xy0
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}
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return Path3D.fromPoints(points, false)
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}
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val spiral = buildTriangleMesh {
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for (i in -1..1 step 2) {
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val p = spiralPath(0.2 * i, 0.25, 4.0, 400)
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extrudeContourAdaptive(
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Circle(0.0, 0.0, 0.1).contour,
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p,
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Vector3.UNIT_Z,
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contourDistanceTolerance = 0.02,
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pathDistanceTolerance = 0.001
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)
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}
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isolated {
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color = ColorRGBa.YELLOW
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rotate(Vector3.UNIT_X, 90.0)
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//rotate(Vector3.UNIT_Y, 45.0)
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for (j in 0 until 1) {
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for (i in -1..1 step 2) {
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val rotationDegrees = j * 180.0 / 1.0
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val rotation = rotationDegrees.asRadians
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val scale = exp(rotation * 0.25)
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val p = spiralPath(0.2 * i * scale, 0.25, 4.0, 400)
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extrudeContourAdaptive(
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Circle(0.0, 0.0, 0.1).contour,
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p,
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Vector3.UNIT_Z,
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contourDistanceTolerance = 0.02,
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pathDistanceTolerance = 0.001
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)
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}
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rotate(Vector3.UNIT_Y, 180.0 / 1.0)
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}
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}
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}
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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 = 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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drawer.rotate(Vector3.UNIT_X, seconds*20.0)
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drawer.vertexBuffer(spiral, DrawPrimitive.TRIANGLES)
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}
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}
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}
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} |