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Improve orx-mesh-generators

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Add GeneratorBuffer
Add Cap
Fix triangle winding
This commit is contained in:
Edwin Jakobs
2019-01-16 18:33:39 +01:00
parent 8fdaa4add6
commit c4e0361100
7 changed files with 393 additions and 11 deletions
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34
orx-mesh-generators/src/main/kotlin/Sphere.kt
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@@ -13,8 +13,8 @@ fun sphereMesh(sides: Int = 16, segments: Int = 16, radius: Double = 1.0, invert
return vb
}
fun generateSphere(sides: Int, segments: Int, radius: Double = 1.0, invert: Boolean = false, writer: VertexWriter) {
fun generateSphere(sides: Int, segments: Int, radius: Double = 1.0, invert: Boolean = false, writer: VertexWriter) {
val inverter = if (invert) -1.0 else 1.0
for (t in 0 until segments) {
for (s in 0 until sides) {
@@ -42,6 +42,38 @@ fun generateSphere(sides: Int, segments: Int, radius: Double = 1.0, invert: Bool
writer(st01.cartesian, st01.cartesian.normalized * inverter, Vector2(st01.phi / phiMax, st01.theta / thetaMax))
writer(st11.cartesian, st11.cartesian.normalized * inverter, Vector2(st11.phi / phiMax, st11.theta / thetaMax))
writer(st11.cartesian, st11.cartesian.normalized * inverter, Vector2(st11.phi / phiMax, st11.theta / thetaMax))
writer(st10.cartesian, st10.cartesian.normalized * inverter, Vector2(st10.phi / phiMax, st10.theta / thetaMax))
writer(st00.cartesian, st00.cartesian.normalized * inverter, Vector2(st00.phi / phiMax, st00.theta / thetaMax))
}
}
}
}
}
fun generateHemisphere(sides: Int, segments: Int, radius: Double = 1.0, invert: Boolean = false, writer: VertexWriter) {
val inverter = if (invert) -1.0 else 1.0
for (t in 0 until segments) {
for (s in 0 until sides) {
val st00 = Spherical(radius, s * Math.PI * 2.0 / sides, t * Math.PI*0.5 / segments)
val st01 = Spherical(radius, s * Math.PI * 2.0 / sides, (t + 1) * Math.PI*0.5 / segments)
val st10 = Spherical(radius, (s + 1) * Math.PI * 2.0 / sides, t * Math.PI*0.5 / segments)
val st11 = Spherical(radius, (s + 1) * Math.PI * 2.0 / sides, (t + 1) * Math.PI*0.5 / segments)
val thetaMax = Math.PI * 0.5
val phiMax = Math.PI * 2.0
when (t) {
0 -> {
writer(st00.cartesian, st00.cartesian.normalized * inverter, Vector2(st00.phi / phiMax, st00.theta / thetaMax))
writer(st01.cartesian, st01.cartesian.normalized * inverter, Vector2(st01.phi / phiMax, st01.theta / thetaMax))
writer(st11.cartesian, st11.cartesian.normalized * inverter, Vector2(st11.phi / phiMax, st11.theta / thetaMax))
}
else -> {
writer(st00.cartesian, st00.cartesian.normalized * inverter, Vector2(st00.phi / phiMax, st00.theta / thetaMax))
writer(st01.cartesian, st01.cartesian.normalized * inverter, Vector2(st01.phi / phiMax, st01.theta / thetaMax))
writer(st11.cartesian, st11.cartesian.normalized * inverter, Vector2(st11.phi / phiMax, st11.theta / thetaMax))
writer(st11.cartesian, st11.cartesian.normalized * inverter, Vector2(st11.phi / phiMax, st11.theta / thetaMax))
writer(st10.cartesian, st10.cartesian.normalized * inverter, Vector2(st10.phi / phiMax, st10.theta / thetaMax))
writer(st00.cartesian, st00.cartesian.normalized * inverter, Vector2(st00.phi / phiMax, st00.theta / thetaMax))