public static Body Create(int segments, double radius, double height)
{
var creator = new GraphicsCreator();
double alpha = 2.0 * Math.PI / segments;
double half = height / 2.0;
double z0 = -half;
double z1 = half;
creator.AddFace(false, false);
for (int i = 0; i < segments; i++)
{
double x0 = (Math.Sin(i * alpha) * radius);
double y0 = (Math.Cos(i * alpha) * radius);
double x1 = (Math.Sin((i + 1) * alpha) * radius);
double y1 = (Math.Cos((i + 1) * alpha) * radius);
var p1 = new Position3D(x0, y0, z0);
var p2 = new Position3D(x0, y0, z1);
var p3 = new Position3D(x1, y1, z0);
var p4 = new Position3D(x1, y1, z1);
creator.AddTriangle(p1, p2, p3);
creator.AddTriangle(p3, p2, p4);
}
creator.AddFace(true, false);
for (int i = 0; i < segments; i++)
{
double x0 = (Math.Sin(i * alpha) * radius);
double y0 = (Math.Cos(i * alpha) * radius);
double x1 = (Math.Sin(((i + 1) * alpha).Modulo2Pi()) * radius);
double y1 = (Math.Cos(((i + 1) * alpha).Modulo2Pi()) * radius);
double x2 = 0.0;
double y2 = 0.0;
var p1 = new Position3D(x0, y0, z1);
var p2 = new Position3D(x1, y1, z1);
var p3 = new Position3D(x2, y2, z1);
creator.AddTriangle(p1, p3, p2);
}
creator.AddFace(true, false);
for (int i = 0; i < segments; i++)
{
double x0 = (Math.Sin(i * alpha) * radius);
double y0 = (Math.Cos(i * alpha) * radius);
double x1 = (Math.Sin(((i + 1) * alpha).Modulo2Pi()) * radius);
double y1 = (Math.Cos(((i + 1) * alpha).Modulo2Pi()) * radius);
double x2 = 0.0;
double y2 = 0.0;
var p1 = new Position3D(x0, y0, z0);
var p2 = new Position3D(x1, y1, z0);
var p3 = new Position3D(x2, y2, z0);
creator.AddTriangle(p1, p2, p3);
}
var body = creator.CreateBody();
return(body);
}
private static void CreateSideFace(
List <Position3D> topLoop1,
List <Position3D> topLoop2,
List <Position3D> bottomLoop1,
List <Position3D> bottomLoop2,
bool hasBorder1,
bool hasBorder2,
bool facetted1,
bool facetted2,
GraphicsCreator creator)
{
creator.AddFace(hasBorder1, facetted1);
var n1 = topLoop1.Count;
for (var i = 0; i < n1 - 1; i++)
{
var p1 = topLoop1[i];
var p2 = bottomLoop1[i];
var p3 = bottomLoop1[(i + 1) % n1];
var p4 = topLoop1[(i + 1) % n1];
creator.AddTriangle(p1, p2, p3);
creator.AddTriangle(p4, p1, p3);
}
creator.AddFace(hasBorder2, facetted2);
var n2 = topLoop2.Count;
for (var i = 0; i < n2 - 1; i++)
{
var p1 = topLoop2[i];
var p2 = bottomLoop2[i];
var p3 = bottomLoop2[(i + 1) % n2];
var p4 = topLoop2[(i + 1) % n2];
creator.AddTriangle(p1, p2, p3);
creator.AddTriangle(p4, p1, p3);
}
creator.AddFace(false, false);
var pkt1 = topLoop1.Last();
var pkt2 = bottomLoop1.Last();
var pkt3 = bottomLoop2.First();
var pkt4 = topLoop2.First();
creator.AddTriangle(pkt1, pkt2, pkt3);
creator.AddTriangle(pkt4, pkt1, pkt3);
creator.AddFace(false, false);
pkt1 = topLoop2.Last();
pkt2 = bottomLoop2.Last();
pkt3 = bottomLoop1.First();
pkt4 = topLoop1.First();
creator.AddTriangle(pkt1, pkt2, pkt3);
creator.AddTriangle(pkt4, pkt1, pkt3);
}
private static void CreateSideFace(List <Position3D> topLoop, List <Position3D> bottomLoop, GraphicsCreator creator)
{
creator.AddFace(false, false);
var n = topLoop.Count;
for (var i = 0; i < n; i++)
{
var p1 = topLoop[i];
var p2 = bottomLoop[i];
var p3 = bottomLoop[(i + 1) % n];
var p4 = topLoop[(i + 1) % n];
creator.AddTriangle(p1, p2, p3);
creator.AddTriangle(p4, p1, p3);
}
}
public static Body Create(double size)
{
size = size > 0 ? size / 2.0 : 0.5;
var p1 = new Position3D(-size, -size, -size);
var p2 = new Position3D(size, -size, -size);
var p3 = new Position3D(size, -size, size);
var p4 = new Position3D(-size, -size, size);
var p5 = new Position3D(-size, size, -size);
var p6 = new Position3D(size, size, -size);
var p7 = new Position3D(size, size, size);
var p8 = new Position3D(-size, size, size);
var creator = new GraphicsCreator();
// South
creator.AddFace(true, false);
creator.AddTriangle(p1, p2, p3);
creator.AddTriangle(p3, p4, p1);
// East
creator.AddFace(true, false);
creator.AddTriangle(p2, p6, p7);
creator.AddTriangle(p7, p3, p2);
// North
creator.AddFace(true, false);
creator.AddTriangle(p6, p5, p8);
creator.AddTriangle(p8, p7, p6);
// West
creator.AddFace(true, false);
creator.AddTriangle(p5, p1, p4);
creator.AddTriangle(p4, p8, p5);
// Top
creator.AddFace(true, false);
creator.AddTriangle(p4, p3, p7);
creator.AddTriangle(p7, p8, p4);
// Bottom
creator.AddFace(true, false);
creator.AddTriangle(p2, p1, p5);
creator.AddTriangle(p5, p6, p2);
var body = creator.CreateBody();
return(body);
}
private static void CreateSection(GraphicsCreator creator, int circleSegments, double[] section, bool hasBorder, bool hasFacets)
{
creator.AddFace(hasBorder, hasFacets);
double alpha = 2.0 * Math.PI / circleSegments;
var n = section.Length - 2;
for (int j = 0; j < n; j += 2)
{
double radius0 = section[j];
double radius1 = section[j + 2];
double z0 = section[j + 1];
double z1 = section[j + 3];
for (int i = 0; i < circleSegments; i++)
{
double x0 = (Math.Cos(i * alpha) * radius0);
double y0 = (Math.Sin(i * alpha) * radius0);
double x1 = (Math.Cos((i + 1) * alpha) * radius0);
double y1 = (Math.Sin((i + 1) * alpha) * radius0);
double x2 = (Math.Cos(i * alpha) * radius1);
double y2 = (Math.Sin(i * alpha) * radius1);
double x3 = (Math.Cos((i + 1) * alpha) * radius1);
double y3 = (Math.Sin((i + 1) * alpha) * radius1);
var p1 = new Position3D(x0, y0, z0);
var p2 = new Position3D(x1, y1, z0);
var p3 = new Position3D(x2, y2, z1);
var p4 = new Position3D(x3, y3, z1);
if (p1 != p2 && p2 != p4)
{
creator.AddTriangle(p1, p2, p4);
}
if (p1 != p3 && p3 != p4)
{
creator.AddTriangle(p4, p3, p1);
}
}
}
}
public static Body Create(int count, double size)
{
var creator = new GraphicsCreator();
var positions = CreatePositions(count, size);
for (var y = 0; y < count; y++)
{
for (var x = 0; x < count; x++)
{
var point1 = positions[x][y];
var point2 = positions[x][y + 1];
var point3 = positions[x + 1][y + 1];
var point4 = positions[x + 1][y];
creator.AddFace(true, false);
creator.AddTriangle(point1, point2, point4);
creator.AddTriangle(point3, point4, point2);
}
}
size = size * count;
size = size > 0 ? size / 2.0 : 0.5;
var hight = 2;
var p1 = new Position3D(-size, -size, -hight);
var p2 = new Position3D(size, -size, -hight);
var p3 = new Position3D(size, -size, 0);
var p4 = new Position3D(-size, -size, 0);
var p5 = new Position3D(-size, size, -hight);
var p6 = new Position3D(size, size, -hight);
var p7 = new Position3D(size, size, 0);
var p8 = new Position3D(-size, size, 0);
// South
creator.AddFace(true, false);
creator.AddTriangle(p1, p2, p3);
creator.AddTriangle(p3, p4, p1);
// East
creator.AddFace(true, false);
creator.AddTriangle(p2, p6, p7);
creator.AddTriangle(p7, p3, p2);
// North
creator.AddFace(true, false);
creator.AddTriangle(p6, p5, p8);
creator.AddTriangle(p8, p7, p6);
// West
creator.AddFace(true, false);
creator.AddTriangle(p5, p1, p4);
creator.AddTriangle(p4, p8, p5);
// Bottom
creator.AddFace(true, false);
creator.AddTriangle(p2, p1, p5);
creator.AddTriangle(p5, p6, p2);
var body = creator.CreateBody();
return(body);
}
private static (List <Position3D>, List <Position3D>) CreateTopBottomFace(int segments1, int segments2, double radius1, double radius2, double length, double depth, double z, GraphicsCreator creator, bool isTop)
{
var startAngle = Math.Acos((radius1 - radius2) / length);
var endAngle = (-startAngle).Modulo2Pi();
var alpha1 = (endAngle - startAngle) / segments1;
var sign = isTop ? 1.0 : -1.0;
creator.AddFace(true, false);
var pointsRadius1 = new List <Position3D>();
for (int i = 0; i < segments1; i++)
{
double x0 = (Math.Cos(i * alpha1 + startAngle) * radius1);
double y0 = sign * (Math.Sin(i * alpha1 + startAngle) * radius1);
double x1 = (Math.Cos(((i + 1) * alpha1 + startAngle).Modulo2Pi()) * radius1);
double y1 = sign * (Math.Sin(((i + 1) * alpha1 + startAngle).Modulo2Pi()) * radius1);
double x2 = 0.0;
double y2 = 0.0;
var p1 = new Position3D(x0, y0, z);
var p2 = new Position3D(x1, y1, z);
var p3 = new Position3D(x2, y2, z);
creator.AddTriangle(p1, p2, p3);
pointsRadius1.Add(p1);
if (i == segments1 - 1)
{
pointsRadius1.Add(p2);
}
}
var alpha2 = (2.0 * Math.PI - (endAngle - startAngle)) / segments2;
startAngle = endAngle;
var pointsRadius2 = new List <Position3D>();
for (int i = 0; i < segments2; i++)
{
double x0 = length + (Math.Cos(i * alpha2 + startAngle) * radius2);
double y0 = sign * (Math.Sin(i * alpha2 + startAngle) * radius2);
double x1 = length + (Math.Cos(((i + 1) * alpha2 + startAngle).Modulo2Pi()) * radius2);
double y1 = sign * (Math.Sin(((i + 1) * alpha2 + startAngle).Modulo2Pi()) * radius2);
double x2 = length;
double y2 = 0.0;
var p1 = new Position3D(x0, y0, z);
var p2 = new Position3D(x1, y1, z);
var p3 = new Position3D(x2, y2, z);
creator.AddTriangle(p1, p2, p3);
pointsRadius2.Add(p1);
if (i == segments2 - 1)
{
pointsRadius2.Add(p2);
}
}
var s1 = pointsRadius1.First();
var e1 = pointsRadius1.Last();
var m1 = new Position3D(0.0, 0.0, z);
var s2 = pointsRadius2.First();
var e2 = pointsRadius2.Last();
var m2 = new Position3D(length, 0.0, z);
creator.AddTriangle(s1, m1, e2);
creator.AddTriangle(e2, m1, m2);
creator.AddTriangle(m1, e1, m2);
creator.AddTriangle(m2, e1, s2);
if (!isTop)
{
pointsRadius1.Reverse();
pointsRadius2.Reverse();
}
return(pointsRadius1, pointsRadius2);
}