public static void FillTriangle(Graphics g, Pen edgePen, Brush fillBrush, Triangle triangle)
{
if (triangle.A == triangle.B && triangle.B == triangle.C)
{
Point endPoint = new Point(triangle.Owner.Points[triangle.A].X + 1, triangle.Owner.Points[triangle.A].Y + 1);
g.DrawLine(edgePen, triangle.Owner.Points[triangle.A], endPoint);
}
else
{
Point[] points = new Point[]
{
triangle.Owner.Points[triangle.A],
triangle.Owner.Points[triangle.B],
triangle.Owner.Points[triangle.C]
};
g.FillPolygon(fillBrush, points);
}
DrawTriangle(g, edgePen, triangle);
}
public Box(float width, float height, float depth)
{
Vertices = new Vertex[]
{
new Vertex { X = -width/2, Y = height/2, Z = -depth/2 },
new Vertex { X = width/2, Y = height/2, Z = -depth/2 },
new Vertex { X = width/2, Y = -height/2, Z = -depth/2 },
new Vertex { X = -width/2, Y = -height/2, Z = -depth/2 },
new Vertex { X = -width/2, Y = height/2, Z = depth/2 },
new Vertex { X = width/2, Y = height/2, Z = depth/2 },
new Vertex { X = width/2, Y = -height/2, Z = depth/2 },
new Vertex { X = -width/2, Y = -height/2, Z = depth/2 },
};
Triangles = new Triangle[]
{
// Front
new Triangle { A = 0, B = 1, C = 2, EdgeMask = EdgeMask.ABC },
new Triangle { A = 2, B = 3, C = 0, EdgeMask = EdgeMask.ABC },
// Back
new Triangle { A = 5, B = 4, C = 7, EdgeMask = EdgeMask.ABC },
new Triangle { A = 7, B = 6, C = 5, EdgeMask = EdgeMask.ABC },
// Top
new Triangle { A = 0, B = 4, C = 5, EdgeMask = EdgeMask.ABC },
new Triangle { A = 5, B = 1, C = 0, EdgeMask = EdgeMask.ABC },
// Right side
new Triangle { A = 1, B = 5, C = 6, EdgeMask = EdgeMask.ABC },
new Triangle { A = 6, B = 2, C = 1, EdgeMask = EdgeMask.ABC },
// Bottom
new Triangle { A = 3, B = 2, C = 6, EdgeMask = EdgeMask.ABC },
new Triangle { A = 6, B = 7, C = 3, EdgeMask = EdgeMask.ABC },
// Right
new Triangle { A = 4, B = 0, C = 3, EdgeMask = EdgeMask.ABC },
new Triangle { A = 3, B = 7, C = 4, EdgeMask = EdgeMask.ABC },
};
}
public ShipModel(float width, float height, float depth)
{
Vertices = new Vertex[]
{
new Vertex { X = -width/2, Y = -height/2, Z = depth/2 },
new Vertex { X = 0, Y = height/2, Z = depth/2 },
new Vertex { X = width/2, Y = -height/2, Z = depth/2 },
new Vertex { X = 0, Y = -height/2, Z = -depth/2 },
};
Triangles = new Triangle[]
{
// Back
new Triangle { A = 0, B = 1, C = 2, EdgeMask = EdgeMask.ABCA },
// Top right
new Triangle { A = 0, B = 3, C = 1, EdgeMask = EdgeMask.ABCA },
// Top left
new Triangle { A = 3, B = 2, C = 1, EdgeMask = EdgeMask.ABCA },
// Bottom
new Triangle { A = 0, B = 2, C = 3, EdgeMask = EdgeMask.ABCA },
};
}
public static void DrawTriangle(Graphics g, Pen pen, Triangle triangle)
{
if (triangle.A == triangle.B && triangle.B == triangle.C)
{
Point endPoint = new Point(triangle.Owner.Points[triangle.A].X + 1, triangle.Owner.Points[triangle.A].Y + 1);
g.DrawLine(pen, triangle.Owner.Points[triangle.A], endPoint);
}
else
{
if ((triangle.EdgeMask & EdgeMask.AB) != 0)
g.DrawLine(pen, triangle.Owner.Points[triangle.A], triangle.Owner.Points[triangle.B]);
if ((triangle.EdgeMask & EdgeMask.BC) != 0)
g.DrawLine(pen, triangle.Owner.Points[triangle.B], triangle.Owner.Points[triangle.C]);
if ((triangle.EdgeMask & EdgeMask.AC) != 0)
g.DrawLine(pen, triangle.Owner.Points[triangle.A], triangle.Owner.Points[triangle.C]);
if ((triangle.EdgeMask & EdgeMask.CA) != 0)
g.DrawLine(pen, triangle.Owner.Points[triangle.C], triangle.Owner.Points[triangle.A]);
}
}
private int CompareTriangleDepth(Triangle a, Triangle b)
{
Vertex vertexA = a.Owner.TransformedVertices[a.B];
Vertex vertexB = b.Owner.TransformedVertices[b.B];
if (vertexA.Z > vertexB.Z)
return -1;
else if (vertexA.Z < vertexB.Z)
return 1;
else
return 0;
}
