public void RenderCircle(Vector3 position, float radius, uint col)
{
const int Reso = 36;
const float MaxDeg = 360f;
const float DegToRad = 0.0174533f;
const float Ang = DegToRad * MaxDeg / Reso;
var dir = Vector3.Normalize(position - camera.Position);
var up = Vector3.Normalize(dir.GetPerpVec());
var axis = Vector3.Cross(dir, up);
var c = new VertexTypePC[Reso];
for (var i = 0; i < Reso; i++)
{
var rDir = Quaternion.RotationAxis(dir, i * Ang).Multiply(axis);
c[i].Position = position + (rDir * radius);
c[i].Colour = col;
}
for (var i = 0; i < c.Length; i++)
{
LineVerts.Add(c[i]);
LineVerts.Add(c[(i + 1) % c.Length]);
}
}
public void RenderCubeLines(Vector3 p1, Vector3 p2, Vector3 a2, Vector3 a3, uint col)
{
VertexTypePC v = new VertexTypePC();
v.Colour = col;
var c1 = p1 - a2 - a3;
var c2 = p1 - a2 + a3;
var c3 = p1 + a2 + a3;
var c4 = p1 + a2 - a3;
var c5 = p2 - a2 - a3;
var c6 = p2 - a2 + a3;
var c7 = p2 + a2 + a3;
var c8 = p2 + a2 - a3;
v.Position = c1; LineVerts.Add(v);
v.Position = c2; LineVerts.Add(v); LineVerts.Add(v);
v.Position = c3; LineVerts.Add(v); LineVerts.Add(v);
v.Position = c4; LineVerts.Add(v); LineVerts.Add(v);
v.Position = c1; LineVerts.Add(v); LineVerts.Add(v);
v.Position = c5; LineVerts.Add(v);
v.Position = c2; LineVerts.Add(v);
v.Position = c6; LineVerts.Add(v);
v.Position = c3; LineVerts.Add(v);
v.Position = c7; LineVerts.Add(v);
v.Position = c4; LineVerts.Add(v);
v.Position = c8; LineVerts.Add(v);
v.Position = c5; LineVerts.Add(v);
v.Position = c6; LineVerts.Add(v); LineVerts.Add(v);
v.Position = c7; LineVerts.Add(v); LineVerts.Add(v);
v.Position = c8; LineVerts.Add(v); LineVerts.Add(v);
v.Position = c5; LineVerts.Add(v);
}
public void RenderArrowLines3D(Vector3 pos, Vector3 dir, Vector3 up, Quaternion ori, float len, float rad, uint colour)
{
Vector3 ax = Vector3.Cross(dir, up);
Vector3 sx = ax * rad;
Vector3 sy = up * rad;
Vector3 sz = dir * len;
VertexTypePC[] c = new VertexTypePC[8];
Vector3 d0 = -sx - sy;
Vector3 d1 = -sx + sy;
Vector3 d2 = +sx - sy;
Vector3 d3 = +sx + sy;
c[0].Position = d0;
c[1].Position = d1;
c[2].Position = d2;
c[3].Position = d3;
c[4].Position = d0 + sz;
c[5].Position = d1 + sz;
c[6].Position = d2 + sz;
c[7].Position = d3 + sz;
for (int i = 0; i < 8; i++)
{
c[i].Colour = colour;
c[i].Position = pos + ori.Multiply(c[i].Position);
}
LineVerts.Add(c[0]);
LineVerts.Add(c[1]);
LineVerts.Add(c[1]);
LineVerts.Add(c[3]);
LineVerts.Add(c[3]);
LineVerts.Add(c[2]);
LineVerts.Add(c[2]);
LineVerts.Add(c[0]);
LineVerts.Add(c[4]);
LineVerts.Add(c[5]);
LineVerts.Add(c[5]);
LineVerts.Add(c[7]);
LineVerts.Add(c[7]);
LineVerts.Add(c[6]);
LineVerts.Add(c[6]);
LineVerts.Add(c[4]);
LineVerts.Add(c[0]);
LineVerts.Add(c[4]);
LineVerts.Add(c[1]);
LineVerts.Add(c[5]);
LineVerts.Add(c[2]);
LineVerts.Add(c[6]);
LineVerts.Add(c[3]);
LineVerts.Add(c[7]);
c[0].Position = pos + ori.Multiply(dir * (len + rad * 5.0f));
c[4].Position += ori.Multiply(d0);
c[5].Position += ori.Multiply(d1);
c[6].Position += ori.Multiply(d2);
c[7].Position += ori.Multiply(d3);
LineVerts.Add(c[4]);
LineVerts.Add(c[5]);
LineVerts.Add(c[5]);
LineVerts.Add(c[7]);
LineVerts.Add(c[7]);
LineVerts.Add(c[6]);
LineVerts.Add(c[6]);
LineVerts.Add(c[4]);
LineVerts.Add(c[0]);
LineVerts.Add(c[4]);
LineVerts.Add(c[0]);
LineVerts.Add(c[5]);
LineVerts.Add(c[0]);
LineVerts.Add(c[6]);
LineVerts.Add(c[0]);
LineVerts.Add(c[7]);
}