public static void DrawOctahedron(ICoreScene3D dc, XYZ center, float radius, int lod, ColorStyle color, bool faceFlip)
{
if (lod < 0)
{
return;
}
var ctx = new PlatonicFactory
{
_Center = center,
_Radius = radius,
_Color = color,
_FaceFlip = faceFlip,
_Context = dc
};
// top 4
ctx.DrawTriangle(lod, XYZ.UnitX, XYZ.UnitY, XYZ.UnitZ);
ctx.DrawTriangle(lod, XYZ.UnitZ, XYZ.UnitY, -XYZ.UnitX);
ctx.DrawTriangle(lod, -XYZ.UnitX, XYZ.UnitY, -XYZ.UnitZ);
ctx.DrawTriangle(lod, -XYZ.UnitZ, XYZ.UnitY, XYZ.UnitX);
// bottom 4
ctx._FaceFlip = !ctx._FaceFlip;
ctx.DrawTriangle(lod, XYZ.UnitX, -XYZ.UnitY, XYZ.UnitZ);
ctx.DrawTriangle(lod, XYZ.UnitZ, -XYZ.UnitY, -XYZ.UnitX);
ctx.DrawTriangle(lod, -XYZ.UnitX, -XYZ.UnitY, -XYZ.UnitZ);
ctx.DrawTriangle(lod, -XYZ.UnitZ, -XYZ.UnitY, XYZ.UnitX);
}
// https://en.wikipedia.org/wiki/Platonic_solid
public static void DrawTetrahedron(ICoreScene3D dc, XYZ center, float radius, int lod, ColorStyle color, bool faceFlip)
{
if (lod < 0)
{
return;
}
var ctx = new PlatonicFactory
{
_Center = center,
_Radius = radius,
_Color = color,
_FaceFlip = faceFlip,
_Context = dc
};
ctx.DrawTriangle(lod, _TETRAVRT0, _TETRAVRT1, _TETRAVRT2);
ctx.DrawTriangle(lod, _TETRAVRT3, _TETRAVRT0, _TETRAVRT2);
ctx.DrawTriangle(lod, _TETRAVRT3, _TETRAVRT1, _TETRAVRT0);
ctx.DrawTriangle(lod, _TETRAVRT3, _TETRAVRT2, _TETRAVRT1);
}
public static void DrawIcosahedron(ICoreScene3D dc, XYZ center, float radius, int lod, ColorStyle color, bool faceFlip)
{
if (lod < 0)
{
return;
}
var ctx = new PlatonicFactory
{
_Center = center,
_Radius = radius,
_Color = color,
_FaceFlip = faceFlip,
_Context = dc
};
// 5 faces around point 0
ctx.DrawTriangle(lod, _ICOVRT0, _ICOVRT11, _ICOVRT5);
ctx.DrawTriangle(lod, _ICOVRT0, _ICOVRT5, _ICOVRT1);
ctx.DrawTriangle(lod, _ICOVRT0, _ICOVRT1, _ICOVRT7);
ctx.DrawTriangle(lod, _ICOVRT0, _ICOVRT7, _ICOVRT10);
ctx.DrawTriangle(lod, _ICOVRT0, _ICOVRT10, _ICOVRT11);
// 5 adjacent faces
ctx.DrawTriangle(lod, _ICOVRT1, _ICOVRT5, _ICOVRT9);
ctx.DrawTriangle(lod, _ICOVRT5, _ICOVRT11, _ICOVRT4);
ctx.DrawTriangle(lod, _ICOVRT11, _ICOVRT10, _ICOVRT2);
ctx.DrawTriangle(lod, _ICOVRT10, _ICOVRT7, _ICOVRT6);
ctx.DrawTriangle(lod, _ICOVRT7, _ICOVRT1, _ICOVRT8);
// 5 faces around point 3
ctx.DrawTriangle(lod, _ICOVRT3, _ICOVRT9, _ICOVRT4);
ctx.DrawTriangle(lod, _ICOVRT3, _ICOVRT4, _ICOVRT2);
ctx.DrawTriangle(lod, _ICOVRT3, _ICOVRT2, _ICOVRT6);
ctx.DrawTriangle(lod, _ICOVRT3, _ICOVRT6, _ICOVRT8);
ctx.DrawTriangle(lod, _ICOVRT3, _ICOVRT8, _ICOVRT9);
// 5 adjacent faces
ctx.DrawTriangle(lod, _ICOVRT4, _ICOVRT9, _ICOVRT5);
ctx.DrawTriangle(lod, _ICOVRT2, _ICOVRT4, _ICOVRT11);
ctx.DrawTriangle(lod, _ICOVRT6, _ICOVRT2, _ICOVRT10);
ctx.DrawTriangle(lod, _ICOVRT8, _ICOVRT6, _ICOVRT7);
ctx.DrawTriangle(lod, _ICOVRT9, _ICOVRT8, _ICOVRT1);
}
