113 lines
3.6 KiB
Kotlin
113 lines
3.6 KiB
Kotlin
package org.openrndr.extra.meshgenerators
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import org.openrndr.extra.shapes.frames.frames
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import org.openrndr.math.Matrix44
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import org.openrndr.math.Vector3
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import org.openrndr.shape.Path3D
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import org.openrndr.shape.ShapeContour
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/**
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* Extrude a [contour] along a [path] specifying the number of steps.
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*
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* @param contour the cross-section of the mesh
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* @param path the 3D path
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* @param stepCount the number of steps along the [path]
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* @param up0 the initial up-vector
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* @param contourDistanceTolerance precision for calculating steps along
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* [contour]. Lower tolerance results in higher precision.
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* @param pathDistanceTolerance precision for calculating steps along
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* [path]. Lower tolerance results in higher precision.
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* @param steps the resulting positions in the path
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* @param frames a list of matrices holding the transformation matrices along
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* the path
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* @param startCap adds a start cap if set to true
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* @param endCap adds an end cap if set to true
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* @param writer the vertex writer function
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*/
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fun extrudeContourStepsMorphed(
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contour: (Double) -> ShapeContour,
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path: Path3D,
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stepCount: Int,
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up0: Vector3,
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contourDistanceTolerance: Double = 0.5,
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pathDistanceTolerance: Double = 0.5,
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steps: List<Vector3> = path.equidistantPositions(
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stepCount,
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pathDistanceTolerance
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),
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frames: List<Matrix44> = steps.frames(up0),
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startCap: Boolean = true,
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endCap: Boolean = true,
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writer: VertexWriter
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) {
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val finalFrames = if (path.closed) frames + frames.first() else frames
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val crossSections = List(finalFrames.size) {
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val t = it / (finalFrames.size - 1.0)
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val linearContour = contour(t).sampleLinear(contourDistanceTolerance)
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linearContour.adaptivePositions()
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}
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// Add caps
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if (!path.closed) {
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if (startCap) {
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triangulationWithFrame(
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ShapeContour.fromPoints(crossSections.first(), true).shape.triangulation,
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finalFrames.first(), false, writer
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)
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}
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if (endCap) {
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triangulationWithFrame(
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ShapeContour.fromPoints(crossSections.last(), true).shape.triangulation,
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finalFrames.last(), false, writer
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)
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}
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}
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// Add sides
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var i = 0
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(finalFrames zip crossSections).windowed(2, 1).forEach {
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contourSegment(
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it[0].second, it[1].second,
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it[0].first, it[1].first,
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i.toDouble() / crossSections.size,
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(++i).toDouble() / crossSections.size,
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writer)
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}
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}
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/**
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* Extrude a [contour] along a [path] specifying the number of steps.
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*
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* @param contour the cross-section of the mesh
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* @param path the 3D path
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* @param stepCount the number of steps along the [path]
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* @param up0 the initial up-vector
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* @param contourDistanceTolerance precision for calculating steps along
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* [contour]. Lower tolerance results in higher precision.
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* @param pathDistanceTolerance precision for calculating steps along
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* [path]. Lower tolerance results in higher precision.
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*/
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fun TriangleMeshBuilder.extrudeContourStepsMorphed(
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contour: (Double) -> ShapeContour,
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path: Path3D,
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stepCount: Int,
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up0: Vector3,
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startCap: Boolean = true,
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endCap: Boolean = true,
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contourDistanceTolerance: Double = 0.5,
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pathDistanceTolerance: Double = 0.5
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) = extrudeContourStepsMorphed(
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contour,
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path,
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stepCount,
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up0,
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startCap = startCap,
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endCap = endCap,
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contourDistanceTolerance = contourDistanceTolerance,
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pathDistanceTolerance = pathDistanceTolerance,
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writer = this::write
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)
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