public static PolygonMesh.Mesh CreateCylinder(Cylinder.CylinderPrimitive cylinderToMeasure)
{
PolygonMesh.Mesh cylinder = new PolygonMesh.Mesh();
List <Vertex> bottomVerts = new List <Vertex>();
List <Vertex> topVerts = new List <Vertex>();
int count = 20;
for (int i = 0; i < count; i++)
{
Vector2 bottomRadialPos = Vector2.Rotate(new Vector2(cylinderToMeasure.Radius1, 0), MathHelper.Tau * i / 20);
Vertex bottomVertex = cylinder.CreateVertex(new Vector3(bottomRadialPos.x, bottomRadialPos.y, -cylinderToMeasure.Height / 2));
bottomVerts.Add(bottomVertex);
Vector2 topRadialPos = Vector2.Rotate(new Vector2(cylinderToMeasure.Radius1, 0), MathHelper.Tau * i / 20);
Vertex topVertex = cylinder.CreateVertex(new Vector3(topRadialPos.x, topRadialPos.y, cylinderToMeasure.Height / 2));
topVerts.Add(topVertex);
}
cylinder.ReverseFaceEdges(cylinder.CreateFace(bottomVerts.ToArray()));
cylinder.CreateFace(topVerts.ToArray());
for (int i = 0; i < count - 1; i++)
{
cylinder.CreateFace(new Vertex[] { topVerts[i], bottomVerts[i], bottomVerts[i + 1], topVerts[i + 1] });
}
cylinder.CreateFace(new Vertex[] { topVerts[count - 1], bottomVerts[count - 1], bottomVerts[0], topVerts[0] });
return(cylinder);
}
public static PolygonMesh.Mesh CreateBox(AxisAlignedBoundingBox aabb)
{
PolygonMesh.Mesh cube = new PolygonMesh.Mesh();
Vertex[] verts = new Vertex[8];
//verts[0] = cube.CreateVertex(new Vector3(-1, -1, 1));
//verts[1] = cube.CreateVertex(new Vector3(1, -1, 1));
//verts[2] = cube.CreateVertex(new Vector3(1, 1, 1));
//verts[3] = cube.CreateVertex(new Vector3(-1, 1, 1));
//verts[4] = cube.CreateVertex(new Vector3(-1, -1, -1));
//verts[5] = cube.CreateVertex(new Vector3(1, -1, -1));
//verts[6] = cube.CreateVertex(new Vector3(1, 1, -1));
//verts[7] = cube.CreateVertex(new Vector3(-1, 1, -1));
verts[0] = cube.CreateVertex(new Vector3(aabb.minXYZ.x, aabb.minXYZ.y, aabb.maxXYZ.z));
verts[1] = cube.CreateVertex(new Vector3(aabb.maxXYZ.x, aabb.minXYZ.y, aabb.maxXYZ.z));
verts[2] = cube.CreateVertex(new Vector3(aabb.maxXYZ.x, aabb.maxXYZ.y, aabb.maxXYZ.z));
verts[3] = cube.CreateVertex(new Vector3(aabb.minXYZ.x, aabb.maxXYZ.y, aabb.maxXYZ.z));
verts[4] = cube.CreateVertex(new Vector3(aabb.minXYZ.x, aabb.minXYZ.y, aabb.minXYZ.z));
verts[5] = cube.CreateVertex(new Vector3(aabb.maxXYZ.x, aabb.minXYZ.y, aabb.minXYZ.z));
verts[6] = cube.CreateVertex(new Vector3(aabb.maxXYZ.x, aabb.maxXYZ.y, aabb.minXYZ.z));
verts[7] = cube.CreateVertex(new Vector3(aabb.minXYZ.x, aabb.maxXYZ.y, aabb.minXYZ.z));
// front
cube.CreateFace(new Vertex[] { verts[0], verts[1], verts[2], verts[3] });
// left
cube.CreateFace(new Vertex[] { verts[4], verts[0], verts[3], verts[7] });
// right
cube.CreateFace(new Vertex[] { verts[1], verts[5], verts[6], verts[2] });
// back
cube.CreateFace(new Vertex[] { verts[4], verts[7], verts[6], verts[5] });
// top
cube.CreateFace(new Vertex[] { verts[3], verts[2], verts[6], verts[7] });
// bottom
cube.CreateFace(new Vertex[] { verts[4], verts[5], verts[1], verts[0] });
return cube;
}
public static PolygonMesh.Mesh CreateBox(AxisAlignedBoundingBox aabb)
{
PolygonMesh.Mesh cube = new PolygonMesh.Mesh();
Vertex[] verts = new Vertex[8];
//verts[0] = cube.CreateVertex(new Vector3(-1, -1, 1));
//verts[1] = cube.CreateVertex(new Vector3(1, -1, 1));
//verts[2] = cube.CreateVertex(new Vector3(1, 1, 1));
//verts[3] = cube.CreateVertex(new Vector3(-1, 1, 1));
//verts[4] = cube.CreateVertex(new Vector3(-1, -1, -1));
//verts[5] = cube.CreateVertex(new Vector3(1, -1, -1));
//verts[6] = cube.CreateVertex(new Vector3(1, 1, -1));
//verts[7] = cube.CreateVertex(new Vector3(-1, 1, -1));
verts[0] = cube.CreateVertex(new Vector3(aabb.minXYZ.x, aabb.minXYZ.y, aabb.maxXYZ.z));
verts[1] = cube.CreateVertex(new Vector3(aabb.maxXYZ.x, aabb.minXYZ.y, aabb.maxXYZ.z));
verts[2] = cube.CreateVertex(new Vector3(aabb.maxXYZ.x, aabb.maxXYZ.y, aabb.maxXYZ.z));
verts[3] = cube.CreateVertex(new Vector3(aabb.minXYZ.x, aabb.maxXYZ.y, aabb.maxXYZ.z));
verts[4] = cube.CreateVertex(new Vector3(aabb.minXYZ.x, aabb.minXYZ.y, aabb.minXYZ.z));
verts[5] = cube.CreateVertex(new Vector3(aabb.maxXYZ.x, aabb.minXYZ.y, aabb.minXYZ.z));
verts[6] = cube.CreateVertex(new Vector3(aabb.maxXYZ.x, aabb.maxXYZ.y, aabb.minXYZ.z));
verts[7] = cube.CreateVertex(new Vector3(aabb.minXYZ.x, aabb.maxXYZ.y, aabb.minXYZ.z));
// front
cube.CreateFace(new Vertex[] { verts[0], verts[1], verts[2], verts[3] });
// left
cube.CreateFace(new Vertex[] { verts[4], verts[0], verts[3], verts[7] });
// right
cube.CreateFace(new Vertex[] { verts[1], verts[5], verts[6], verts[2] });
// back
cube.CreateFace(new Vertex[] { verts[4], verts[7], verts[6], verts[5] });
// top
cube.CreateFace(new Vertex[] { verts[3], verts[2], verts[6], verts[7] });
// bottom
cube.CreateFace(new Vertex[] { verts[4], verts[5], verts[1], verts[0] });
return(cube);
}
public static PolygonMesh.Mesh CreateCylinder(Cylinder.CylinderPrimitive cylinderToMeasure)
{
PolygonMesh.Mesh cylinder = new PolygonMesh.Mesh();
List<Vertex> bottomVerts = new List<Vertex>();
List<Vertex> topVerts = new List<Vertex>();
int count = 20;
for (int i = 0; i < count; i++)
{
Vector2 bottomRadialPos = Vector2.Rotate(new Vector2(cylinderToMeasure.Radius1, 0), MathHelper.Tau * i / 20);
Vertex bottomVertex = cylinder.CreateVertex(new Vector3(bottomRadialPos.x, bottomRadialPos.y, -cylinderToMeasure.Height / 2));
bottomVerts.Add(bottomVertex);
Vector2 topRadialPos = Vector2.Rotate(new Vector2(cylinderToMeasure.Radius1, 0), MathHelper.Tau * i / 20);
Vertex topVertex = cylinder.CreateVertex(new Vector3(topRadialPos.x, topRadialPos.y, cylinderToMeasure.Height / 2));
topVerts.Add(topVertex);
}
cylinder.ReverseFaceEdges(cylinder.CreateFace(bottomVerts.ToArray()));
cylinder.CreateFace(topVerts.ToArray());
for (int i = 0; i < count - 1; i++)
{
cylinder.CreateFace(new Vertex[] { topVerts[i], bottomVerts[i], bottomVerts[i + 1], topVerts[i + 1] });
}
cylinder.CreateFace(new Vertex[] { topVerts[count - 1], bottomVerts[count - 1], bottomVerts[0], topVerts[0] });
return cylinder;
}