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[orx-mesh-generators] add texture coordinates for shape extrusions

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This commit is contained in:
Edwin Jakobs
2020-08-03 22:00:48 +02:00
parent d19d51f852
commit 9a8240609e
2 changed files with 44 additions and 12 deletions
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23
orx-mesh-generators/src/main/kotlin/GeneratorBuffer.kt
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@@ -125,12 +125,27 @@ fun GeneratorBuffer.revolve(sides: Int, length: Double, enveloppe: List<Vector2>
generateRevolve(sides, length, enveloppe, this::write)
}
fun GeneratorBuffer.extrudeShape(baseTriangles: List<Vector2>, contours: List<List<Vector2>>, length: Double, scale: Double = 1.0, distanceTolerance: Double = 0.5) {
extrudeShape(baseTriangles, contours, -length / 2.0, length / 2.0, scale, scale, true, true, distanceTolerance, false, this::write)
fun GeneratorBuffer.extrudeShape(
baseTriangles: List<Vector2>,
contours: List<List<Vector2>>,
length: Double,
scale: Double = 1.0,
frontCap: Boolean = true,
backCap: Boolean = true,
distanceTolerance: Double = 0.5
) {
extrudeShape(baseTriangles, contours, -length / 2.0, length / 2.0, scale, scale, frontCap = frontCap, backCap = backCap, distanceTolerance = distanceTolerance, flipNormals = false, writer = this::write)
}
fun GeneratorBuffer.extrudeShape(shape: Shape, length: Double, scale: Double = 1.0, distanceTolerance: Double = 0.5) {
extrudeShape(shape, -length / 2.0, length / 2.0, scale, scale, true, true, distanceTolerance, false, this::write)
fun GeneratorBuffer.extrudeShape(
shape: Shape,
length: Double,
scale: Double = 1.0,
frontCap: Boolean = true,
backCap: Boolean = true,
distanceTolerance: Double = 0.5
) {
extrudeShape(shape, -length / 2.0, length / 2.0, scale, scale, frontCap, backCap, distanceTolerance, false, this::write)
}
fun GeneratorBuffer.extrudeShapes(shapes: List<Shape>, length: Double, scale: Double = 1.0, distanceTolerance: Double = 0.5) {

33
orx-mesh-generators/src/main/kotlin/MeshGenerators.kt
View File

@@ -78,29 +78,46 @@ fun extrudeShape(baseTriangles: List<Vector2>, contours: List<List<Vector2>>, fr
contours.forEach {
val points = it
val normals = (0 until points.size).map {
(points[mod(it + 1, points.size)] - points[mod(it - 1, points.size)]).safeNormalized * -flip
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) ->
val width = right.first.distanceTo(left.first)
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 height = frontRight.distanceTo(backRight)
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 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(frontLeft, lnormal, frontLeftUV)
writer(frontRight, rnormal, frontRightUV)
writer(backRight, rnormal, backRightUV)
writer(backRight, rnormal, Vector2.ZERO)
writer(backLeft, lnormal, Vector2.ZERO)
writer(frontLeft, lnormal, Vector2.ZERO)
writer(backRight, rnormal, backRightUV)
writer(backLeft, lnormal, backLeftUV)
writer(frontLeft, lnormal, frontLeftUV)
offset += width
}
}
}