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Bumped version to 0.0.13, added extrudeShape cap and taper arguments

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Edwin Jakobs
2018-11-20 15:33:57 +01:00
parent 9c4bebd10a
commit bc0282c8aa
2 changed files with 65 additions and 22 deletions
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83
orx-mesh-generators/src/main/kotlin/MeshGenerators.kt
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@@ -38,57 +38,100 @@ fun meshVertexBuffer(size: Int): VertexBuffer {
}, size)
}
@Deprecated("binary compatibility only")
fun extrudeShape(shape: Shape, front: Double, back: Double, distanceTolerance: Double = 0.5, writer: VertexWriter) {
extrudeShape(shape, front, back, distanceTolerance = distanceTolerance, flipNormals = false, writer = writer)
}
/**
* extrudes a [shape] by triangulating it and creating sides and cap geometry
* extrudes a [shape] by triangulating it and creating side- and cap geometry
* @sample sample
*/
fun extrudeShape(shape: Shape, front: Double, back: Double, distanceTolerance: Double = 0.5, writer: VertexWriter) {
fun extrudeShape(shape: Shape,
front: Double,
back: Double,
frontScale: Double = 1.0,
backScale: Double = 1.0,
frontCap: Boolean = true,
backCap: Boolean = true,
distanceTolerance: Double = 0.5,
flipNormals: Boolean = false, writer: VertexWriter) {
val baseTriangles = triangulate(shape, distanceTolerance)
val depth = back - front
val normal = Vector3(0.0, 0.0, depth).normalized
val negativeNormal = normal * -1.0
val flip = if (flipNormals) 1.0 else -1.0
baseTriangles.forEach {
writer(it.vector3(z = front), normal, Vector2.ZERO)
}
baseTriangles.forEach {
writer(it.vector3(z = back), negativeNormal, Vector2.ZERO)
run {
val normal = Vector3(0.0, 0.0, depth).normalized * flip
val negativeNormal = normal * -1.0
if (frontCap) {
baseTriangles.forEach {
writer((it*frontScale).vector3(z = front), normal, Vector2.ZERO)
}
}
if (backCap) {
baseTriangles.forEach {
writer((it*backScale).vector3(z = back), negativeNormal, Vector2.ZERO)
}
}
}
shape.contours.forEach {
val points = it.adaptivePositions(distanceTolerance)
val normals = (0 until points.size).map {
(points[mod(it+1, points.size)]-points[mod(it-1, points.size)]).safeNormalized
(points[mod(it + 1, points.size)] - points[mod(it - 1, points.size)]).safeNormalized * -flip
}
val forward = Vector3(0.0, 0.0, depth)
val base = Vector3(0.0, 0.0, front)
(points zip normals).zipWithNext().forEach { (left, right) ->
val lnormal = left.second.perpendicular.vector3()
val rnormal = right.second.perpendicular.vector3()
writer(left.first.vector3() + base, lnormal, Vector2.ZERO)
writer(right.first.vector3() + base, rnormal, Vector2.ZERO)
writer(right.first.vector3() + base + forward, rnormal, Vector2.ZERO)
val frontRight = (right.first * frontScale).xy0 + base
val frontLeft = (left.first * frontScale).xy0 + base
writer(right.first.vector3() + base + forward, rnormal, Vector2.ZERO)
writer(left.first.vector3() + base + forward, lnormal, Vector2.ZERO)
writer(left.first.vector3() + base, lnormal, Vector2.ZERO)
val backRight =(right.first * backScale).xy0 + base + forward
val backLeft = (left.first * backScale).xy0 + base + forward
val lnormal = (frontLeft - backLeft).normalized.cross(left.second.xy0)
val rnormal = (frontRight - backRight).normalized.cross(right.second.xy0)
writer(frontLeft, lnormal, Vector2.ZERO)
writer(frontRight, rnormal, Vector2.ZERO)
writer(backRight, rnormal, Vector2.ZERO)
writer(backRight, rnormal, Vector2.ZERO)
writer(backLeft, lnormal, Vector2.ZERO)
writer(frontLeft, lnormal, Vector2.ZERO)
}
}
}
fun extrudeShapes(shapes: List<Shape>,
front: Double,
back: Double,
frontScale: Double = 1.0,
backScale: Double = 1.0,
frontCap: Boolean = true,
backCap: Boolean = true,
distanceTolerance: Double = 0.5,
flipNormals: Boolean = false, writer: VertexWriter ) {
shapes.forEach {
extrudeShape(it, front, back, frontScale, backScale, frontCap , backCap , distanceTolerance, flipNormals, writer)
}
}
private val Vector2.safeNormalized: Vector2
get() {
return if (length > 0.0001) {
normalized
} else {
Vector2.ZERO
}
}
/**