/// <summary>
/// Renders a billboard along a line.
/// </summary>
/// <param name="pos">Start position.</param>
/// <param name="p2">End position.</param>
/// <param name="width">Width of the line.</param>
/// <param name="facing">Facing target.</param>
/// <param name="view">Relevant view.</param>
public void RenderBilboardLine(Location pos, Location p2, float width, Location facing, View3D view)
{
Location center = (pos + p2) * 0.5;
double len = (center - facing).Length();
Location lookdir = (center - facing) / len;
double len2 = (p2 - pos).Length();
if (len < 0.001 || len2 < 0.001)
{
return;
}
Location updir = (p2 - pos) / len2;
Location right = updir.CrossProduct(lookdir);
Matrix4d mat = Matrix4d.CreateTranslation(-0.5f, -0.5f, 0f) * Matrix4d.Scale((float)len2 * 0.5f, width, 1f);
Matrix4d m2 = new Matrix4d(right.X, updir.X, lookdir.X, center.X,
right.Y, updir.Y, lookdir.Y, center.Y,
right.Z, updir.Z, lookdir.Z, center.Z,
0, 0, 0, 1);
m2.Transpose();
mat *= m2;
view.SetMatrix(2, mat);
GL.BindVertexArray(Square._VAO);
GL.DrawElements(PrimitiveType.Triangles, 6, DrawElementsType.UnsignedInt, IntPtr.Zero);
GL.BindVertexArray(0);
}
/// <summary>
/// Render a cylinder between two points.
/// </summary>
/// <param name="start">The initial point.</param>
/// <param name="end">The ending point.</param>
/// <param name="width">The width of the cylinder.</param>
/// <param name="view">The relevant view.</param>
public void RenderCylinder(Location start, Location end, float width, View3D view)
{
float len = (float)(end - start).Length();
Location vecang = Utilities.VectorToAngles(start - end);
vecang.Yaw += 180;
Matrix4d mat = Matrix4d.CreateRotationY((float)(90 * Utilities.PI180))
* Matrix4d.Scale(len, width, width)
* Matrix4d.CreateRotationY((float)(vecang.Y * Utilities.PI180))
* Matrix4d.CreateRotationZ((float)(vecang.Z * Utilities.PI180))
* Matrix4d.CreateTranslation(start.ToOpenTK3D());
view.SetMatrix(2, mat);
Models.Cylinder.Draw(); // TODO: Models reference in constructor - or client reference?
}
/// <summary>
/// Render a cylinder between two points.
/// </summary>
/// <param name="context">The sourcing render context.</param>
/// <param name="start">The initial point.</param>
/// <param name="end">The ending point.</param>
/// <param name="width">The width of the cylinder.</param>
/// <param name="view">The relevant view.</param>
public void RenderCylinder(RenderContext context, Location start, Location end, float width, View3D view)
{
float len = (float)(end - start).Length();
Location vecang = MathUtilities.VectorToAngles(start - end);
vecang.Yaw += 180;
Matrix4d mat = Matrix4d.CreateRotationY((float)(90 * MathUtilities.PI180))
* Matrix4d.Scale(len, width, width)
* Matrix4d.CreateRotationY((float)(vecang.Y * MathUtilities.PI180))
* Matrix4d.CreateRotationZ((float)(vecang.Z * MathUtilities.PI180))
* Matrix4d.CreateTranslation(start.ToOpenTK3D());
view.SetMatrix(2, mat);
Models.Cylinder.Draw(context);
}
/// <summary>
/// Render a line between two points.
/// </summary>
/// <param name="start">The initial point.</param>
/// <param name="end">The ending point.</param>
/// <param name="view">The relevant view.</param>
public void RenderLine(Location start, Location end, View3D view)
{
// TODO: Efficiency!
float len = (float)(end - start).Length();
Location vecang = Utilities.VectorToAngles(start - end);
vecang.Yaw += 180;
Matrix4d mat = Matrix4d.Scale(len, 1, 1)
* Matrix4d.CreateRotationY((float)(vecang.Y * Utilities.PI180))
* Matrix4d.CreateRotationZ((float)(vecang.Z * Utilities.PI180))
* Matrix4d.CreateTranslation(start.ToOpenTK3D());
view.SetMatrix(2, mat);
GL.BindVertexArray(Line._VAO);
GL.DrawElements(PrimitiveType.Lines, 2, DrawElementsType.UnsignedInt, IntPtr.Zero);
}
/// <summary>
/// Renders a flat billboard (a sprite).
/// </summary>
/// <param name="center">The center of it.</param>
/// <param name="scale">The scale of it.</param>
/// <param name="facing">Where it's facing.</param>
/// <param name="view">The relevant view.</param>
/// <param name="pzr">Z rotation if any.</param>
public void RenderBillboard(Location center, Location scale, Location facing, View3D view, float pzr = 0f)
{
Location lookdir = (facing - center).Normalize();
Location right = lookdir.CrossProduct(Location.UnitZ); // TODO: Camera up vector!
Location updir = right.CrossProduct(lookdir);
Matrix4d mat = Matrix4d.CreateTranslation(-0.5f, -0.5f, 0f) * Matrix4d.Scale((float)scale.X, (float)scale.Y, (float)scale.Z);
Matrix4d m2 = new Matrix4d(right.X, updir.X, lookdir.X, center.X,
right.Y, updir.Y, lookdir.Y, center.Y,
right.Z, updir.Z, lookdir.Z, center.Z,
0, 0, 0, 1);
m2.Transpose();
mat *= m2;
view.SetMatrix(2, mat);
GL.BindVertexArray(Square._VAO);
GL.DrawElements(PrimitiveType.Triangles, 6, DrawElementsType.UnsignedInt, IntPtr.Zero);
GL.BindVertexArray(0);
/*
* // TODO: Quaternion magic?
* Location relang = Utilities.VectorToAngles(pos - facing);
* if (relang.IsInfinite() || relang.IsNaN())
* {
* throw new Exception("Unable to handle billboard: relang=" + relang);
* }
* Matrix4d mat =
* Matrix4d.Scale(ClientUtilities.ConvertD(scale))
* Matrix4d.CreateTranslation(-0.5f, -0.5f, 0f)
* Matrix4d.CreateRotationY((float)((relang.Y - 90) * Utilities.PI180))
* Matrix4d.CreateRotationZ((float)(relang.Z * Utilities.PI180))
* Matrix4d.CreateTranslation(ClientUtilities.ConvertD(pos + new Location(scale.X * 0.5, scale.Y * 0.5, 0.0)));
* Client.Central.MainWorldView.SetMatrix(2, mat); // TODO: Client reference!
* GL.BindVertexArray(Square._VAO);
* GL.DrawElements(PrimitiveType.Triangles, 6, DrawElementsType.UnsignedInt, IntPtr.Zero);
* GL.BindVertexArray(0);
*/
}
/// <summary>
/// Renders a line box.
/// </summary>
/// <param name="min">The minimum coordinate.</param>
/// <param name="max">The maximmum coordinate.</param>
/// <param name="view">The relevant view.</param>
/// <param name="rot">Any rotation.</param>
public void RenderLineBox(Location min, Location max, View3D view, Matrix4d?rot = null)
{
if (min.IsNaN() || min.IsInfinite() || max.IsNaN() || max.IsInfinite())
{
SysConsole.Output(OutputType.WARNING, "Invalid line box from " + min + " to " + max);
SysConsole.Output(OutputType.DEBUG, Environment.StackTrace);
return;
}
GL.ActiveTexture(TextureUnit.Texture0);
TEngine.White.Bind();
GraphicsUtil.CheckError("RenderLineBox: BindTexture");
Location halfsize = (max - min) * 0.5;
if ((min + halfsize) == Location.Zero)
{
return; // ???
}
if (Math.Abs(min.X + halfsize.X) < 1 || Math.Abs(min.Y + halfsize.Y) < 1 || Math.Abs(min.Z + halfsize.Z) < 1)
{
return; // ???
}
if (Math.Abs(min.X) < 1 || Math.Abs(min.Y) < 1 || Math.Abs(min.Z) < 1)
{
return; // ???
}
Matrix4d mat = Matrix4d.Scale(halfsize.ToOpenTK3D())
* (rot != null && rot.HasValue ? rot.Value : Matrix4d.Identity)
* Matrix4d.CreateTranslation((min + halfsize).ToOpenTK3D());
view.SetMatrix(2, mat); // TODO: Client reference!
GraphicsUtil.CheckError("RenderLineBox: SetMatrix");
GL.BindVertexArray(Box._VAO);
GraphicsUtil.CheckError("RenderLineBox: Bind VAO");
GL.DrawElements(PrimitiveType.Lines, 24, DrawElementsType.UnsignedInt, IntPtr.Zero);
GraphicsUtil.CheckError("RenderLineBox: Pass");
}
