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[orx-mesh-generators] Add arguments to make sides in shape extrude optional

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This commit is contained in:
Edwin Jakobs
2020-08-13 10:51:39 +02:00
parent d695d07708
commit 6fc76daa13
2 changed files with 62 additions and 45 deletions
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30
orx-mesh-generators/src/main/kotlin/GeneratorBuffer.kt
View File

@@ -143,16 +143,40 @@ fun GeneratorBuffer.extrudeShape(
scale: Double = 1.0,
frontCap: Boolean = true,
backCap: Boolean = true,
sides: Boolean = true,
distanceTolerance: Double = 0.5
) {
extrudeShape(shape, -length / 2.0, length / 2.0, scale, scale, frontCap, backCap, distanceTolerance, false, this::write)
extrudeShape(
shape = shape,
front = -length / 2.0,
back = length / 2.0,
frontScale = scale,
backScale = scale,
frontCap = frontCap,
backCap = backCap,
sides = sides,
distanceTolerance = distanceTolerance,
flipNormals = false,
writer = this::write
)
}
fun GeneratorBuffer.extrudeShapes(shapes: List<Shape>, length: Double, scale: Double = 1.0, distanceTolerance: Double = 0.5) {
extrudeShapes(shapes, -length / 2.0, length / 2.0, scale, scale, true, true, distanceTolerance, false, this::write)
extrudeShapes(
shapes = shapes,
front = -length / 2.0,
back = length / 2.0,
frontScale = scale,
backScale = scale,
frontCap = true,
backCap = true,
sides = true,
distanceTolerance = distanceTolerance,
flipNormals = false,
writer = this::write
)
}
fun meshGenerator(vertexBuffer: VertexBuffer? = null, builder: GeneratorBuffer.() -> Unit): VertexBuffer {
val gb = GeneratorBuffer()
gb.builder()

77
orx-mesh-generators/src/main/kotlin/MeshGenerators.kt
View File

@@ -53,6 +53,7 @@ fun extrudeShape(baseTriangles: List<Vector2>, contours: List<List<Vector2>>, fr
backScale: Double = 1.0,
frontCap: Boolean = true,
backCap: Boolean = true,
sides: Boolean = true,
distanceTolerance: Double = 0.5,
flipNormals: Boolean = false, writer: VertexWriter) {
@@ -75,49 +76,51 @@ fun extrudeShape(baseTriangles: List<Vector2>, contours: List<List<Vector2>>, fr
}
}
contours.forEach {
val points = it
if (sides) {
contours.forEach {
val points = it
val normals = (points.indices).map { index ->
(points[mod(index + 1, points.size)] - points[mod(index - 1, points.size)]).safeNormalized * -flip
}
val forward = Vector3(0.0, 0.0, depth)
val base = Vector3(0.0, 0.0, front)
val normals = (points.indices).map { index ->
(points[mod(index + 1, points.size)] - points[mod(index - 1, points.size)]).safeNormalized * -flip
}
val forward = Vector3(0.0, 0.0, depth)
val base = Vector3(0.0, 0.0, front)
var offset = 0.0
(points zip normals).zipWithNext().forEach { (left, right) ->
var offset = 0.0
(points zip normals).zipWithNext().forEach { (left, right) ->
val width = right.first.distanceTo(left.first)
val width = right.first.distanceTo(left.first)
val frontRight = (right.first * frontScale).xy0 + base
val frontLeft = (left.first * frontScale).xy0 + base
val frontRight = (right.first * frontScale).xy0 + base
val frontLeft = (left.first * frontScale).xy0 + base
val backRight = (right.first * backScale).xy0 + base + forward
val backLeft = (left.first * backScale).xy0 + base + forward
val backRight = (right.first * backScale).xy0 + base + forward
val backLeft = (left.first * backScale).xy0 + base + forward
val height = frontRight.distanceTo(backRight)
val height = frontRight.distanceTo(backRight)
val backRightUV = Vector2(offset + width, 0.0)
val backLeftUV = Vector2(offset, 0.0)
val backRightUV = Vector2(offset + width, 0.0)
val backLeftUV = Vector2(offset, 0.0)
val frontLeftUV = Vector2(offset, height)
val frontRightUV = Vector2(offset + width, height)
val frontLeftUV = Vector2(offset, height)
val frontRightUV = Vector2(offset + width, height)
val lnormal = (frontLeft - backLeft).normalized.cross(left.second.xy0)
val rnormal = (frontRight - backRight).normalized.cross(right.second.xy0)
val lnormal = (frontLeft - backLeft).normalized.cross(left.second.xy0)
val rnormal = (frontRight - backRight).normalized.cross(right.second.xy0)
writer(frontLeft, lnormal, frontLeftUV)
writer(frontRight, rnormal, frontRightUV)
writer(backRight, rnormal, backRightUV)
writer(frontLeft, lnormal, frontLeftUV)
writer(frontRight, rnormal, frontRightUV)
writer(backRight, rnormal, backRightUV)
writer(backRight, rnormal, backRightUV)
writer(backLeft, lnormal, backLeftUV)
writer(frontLeft, lnormal, frontLeftUV)
writer(backRight, rnormal, backRightUV)
writer(backLeft, lnormal, backLeftUV)
writer(frontLeft, lnormal, frontLeftUV)
offset += width
offset += width
}
}
}
}
@@ -133,12 +136,13 @@ fun extrudeShape(shape: Shape,
backScale: Double = 1.0,
frontCap: Boolean = true,
backCap: Boolean = true,
sides: Boolean = true,
distanceTolerance: Double = 0.5,
flipNormals: Boolean = false, writer: VertexWriter) {
val baseTriangles = triangulate(shape, distanceTolerance)
val points = shape.contours.map { it.adaptivePositions(distanceTolerance) }
extrudeShape(baseTriangles, points, front, back, frontScale, backScale, frontCap, backCap, distanceTolerance,
extrudeShape(baseTriangles, points, front, back, frontScale, backScale, sides, frontCap, backCap, distanceTolerance,
flipNormals, writer)
}
@@ -149,10 +153,11 @@ fun extrudeShapes(shapes: List<Shape>,
backScale: Double = 1.0,
frontCap: Boolean = true,
backCap: Boolean = true,
sides: Boolean = true,
distanceTolerance: Double = 0.5,
flipNormals: Boolean = false, writer: VertexWriter) {
shapes.forEach {
extrudeShape(it, front, back, frontScale, backScale, frontCap, backCap, distanceTolerance, flipNormals, writer)
extrudeShape(it, front, back, frontScale, backScale, frontCap, backCap, sides, distanceTolerance, flipNormals, writer)
}
}
@@ -164,15 +169,3 @@ private val Vector2.safeNormalized: Vector2
Vector2.ZERO
}
}
/**
* @suppress
*/
private fun sample() {
val shape = Circle(100.0, 100.0, 200.0).shape
val vbo = meshVertexBuffer(400)
val vertexCount = vbo.put {
extrudeShape(shape, 0.0, 10.0, 0.05, bufferWriter(this))
}
}