public static void RenderAabb(this WorldView world, AxisAlignedBoundingBox bounds, Matrix4X4 matrix, Color color, double lineWidth = 1, double extendLineLength = 0)
{
GLHelper.PrepareFor3DLineRender(true);
Frustum frustum = world.GetClippingFrustum();
for (int i = 0; i < 4; i++)
{
Vector3 sideStartPosition = Vector3Ex.Transform(bounds.GetBottomCorner(i), matrix);
Vector3 sideEndPosition = Vector3Ex.Transform(bounds.GetTopCorner(i), matrix);
Vector3 bottomStartPosition = sideStartPosition;
Vector3 bottomEndPosition = Vector3Ex.Transform(bounds.GetBottomCorner((i + 1) % 4), matrix);
Vector3 topStartPosition = sideEndPosition;
Vector3 topEndPosition = Vector3Ex.Transform(bounds.GetTopCorner((i + 1) % 4), matrix);
if (extendLineLength > 0)
{
GLHelper.ExtendLineEnds(ref sideStartPosition, ref sideEndPosition, extendLineLength);
GLHelper.ExtendLineEnds(ref topStartPosition, ref topEndPosition, extendLineLength);
GLHelper.ExtendLineEnds(ref bottomStartPosition, ref bottomEndPosition, extendLineLength);
}
// draw each of the edge lines (4) and their touching top and bottom lines (2 each)
world.Render3DLineNoPrep(frustum, sideStartPosition, sideEndPosition, color, lineWidth);
world.Render3DLineNoPrep(frustum, topStartPosition, topEndPosition, color, lineWidth);
world.Render3DLineNoPrep(frustum, bottomStartPosition, bottomEndPosition, color, lineWidth);
}
GL.Enable(EnableCap.Lighting);
}
public static void RenderAxis(this WorldView world, Vector3 position, Matrix4X4 matrix, double size, double lineWidth)
{
GLHelper.PrepareFor3DLineRender(true);
Frustum frustum = world.GetClippingFrustum();
Vector3 length = Vector3.One * size;
for (int i = 0; i < 3; i++)
{
var min = position;
min[i] -= length[i];
Vector3 start = Vector3Ex.Transform(min, matrix);
var max = position;
max[i] += length[i];
Vector3 end = Vector3Ex.Transform(max, matrix);
var color = Agg.Color.Red;
switch (i)
{
case 1:
color = Agg.Color.Green;
break;
case 2:
color = Agg.Color.Blue;
break;
}
// draw each of the edge lines (4) and their touching top and bottom lines (2 each)
world.Render3DLineNoPrep(frustum, start, end, color, lineWidth);
}
GL.Enable(EnableCap.Lighting);
}
public static void RenderPathOutline(this WorldView world, Matrix4X4 worldMatrix, IVertexSource path, Color color, double lineWidth = 1)
{
GLHelper.PrepareFor3DLineRender(true);
Frustum frustum = world.GetClippingFrustum();
Vector3 firstPosition = default(Vector3);
Vector3 prevPosition = default(Vector3);
foreach (var vertex in path.Vertices())
{
if (vertex.command == ShapePath.FlagsAndCommand.MoveTo)
{
firstPosition = prevPosition = new Vector3(vertex.position).Transform(worldMatrix);
}
else if (vertex.command == ShapePath.FlagsAndCommand.LineTo)
{
var position = new Vector3(vertex.position).Transform(worldMatrix);
world.Render3DLineNoPrep(frustum, prevPosition, position, color, lineWidth);
prevPosition = position;
}
else if (vertex.command.HasFlag(ShapePath.FlagsAndCommand.FlagClose))
{
world.Render3DLineNoPrep(frustum, prevPosition, firstPosition, color, lineWidth);
}
}
// turn the lighting back on
GL.Enable(EnableCap.Lighting);
}
public static void RenderRing(this WorldView world,
Matrix4X4 worldMatrix,
Vector3 center,
double diameter,
int sides,
Color ringColor,
double lineWidth = 1,
double phase = 0,
bool zBuffered = true)
{
GLHelper.PrepareFor3DLineRender(zBuffered);
Frustum frustum = world.GetClippingFrustum();
for (int i = 0; i < sides; i++)
{
var startAngle = MathHelper.Tau * i / sides + phase;
var rotatedPoint = new Vector3(Math.Cos(startAngle), Math.Sin(startAngle), 0) * diameter / 2;
var sideTop = Vector3Ex.Transform(center + rotatedPoint, worldMatrix);
var sideBottom = Vector3Ex.Transform(center + rotatedPoint, worldMatrix);
var endAngle = MathHelper.Tau * (i + 1) / sides + phase;
var rotated2Point = new Vector3(Math.Cos(endAngle), Math.Sin(endAngle), 0) * diameter / 2;
var topStart = sideTop;
var topEnd = Vector3Ex.Transform(center + rotated2Point, worldMatrix);
if (ringColor != Color.Transparent)
{
world.Render3DLineNoPrep(frustum, topStart, topEnd, ringColor, lineWidth);
}
}
// turn the lighting back on
GL.Enable(EnableCap.Lighting);
}
public static void RenderCylinderOutline(this WorldView world, Matrix4X4 worldMatrix, Vector3 center, double diameter, double height, int sides, Color topBottomRingColor, Color sideLinesColor, double lineWidth = 1, double extendLineLength = 0, double phase = 0)
{
GLHelper.PrepareFor3DLineRender(true);
Frustum frustum = world.GetClippingFrustum();
for (int i = 0; i < sides; i++)
{
var startAngle = MathHelper.Tau * i / sides + phase;
var rotatedPoint = new Vector3(Math.Cos(startAngle), Math.Sin(startAngle), 0) * diameter / 2;
var sideTop = Vector3Ex.Transform(center + rotatedPoint + new Vector3(0, 0, height / 2), worldMatrix);
var sideBottom = Vector3Ex.Transform(center + rotatedPoint + new Vector3(0, 0, -height / 2), worldMatrix);
var endAngle = MathHelper.Tau * (i + 1) / sides + phase;
var rotated2Point = new Vector3(Math.Cos(endAngle), Math.Sin(endAngle), 0) * diameter / 2;
var topStart = sideTop;
var topEnd = Vector3Ex.Transform(center + rotated2Point + new Vector3(0, 0, height / 2), worldMatrix);
var bottomStart = sideBottom;
var bottomEnd = Vector3Ex.Transform(center + rotated2Point + new Vector3(0, 0, -height / 2), worldMatrix);
if (extendLineLength > 0)
{
GLHelper.ExtendLineEnds(ref sideTop, ref sideBottom, extendLineLength);
}
if (sideLinesColor != Color.Transparent)
{
world.Render3DLineNoPrep(frustum, sideTop, sideBottom, sideLinesColor, lineWidth);
}
if (topBottomRingColor != Color.Transparent)
{
world.Render3DLineNoPrep(frustum, topStart, topEnd, topBottomRingColor, lineWidth);
world.Render3DLineNoPrep(frustum, bottomStart, bottomEnd, topBottomRingColor, lineWidth);
}
}
}
/// <summary>
/// Draw a line in the scene in 3D but scale it such that it appears as a 2D line in the view.
/// </summary>
/// <param name="world"></param>
/// <param name="clippingFrustum">This is a cache of the frustum from world.
/// Much faster to pass this way if drawing lots of lines.</param>
/// <param name="start"></param>
/// <param name="end"></param>
/// <param name="color"></param>
/// <param name="doDepthTest"></param>
/// <param name="width"></param>
public static void Render3DLine(this WorldView world, Frustum clippingFrustum, Vector3 start, Vector3 end, Color color, bool doDepthTest = true, double width = 1, bool startArrow = false, bool endArrow = false)
{
GL.PushAttrib(AttribMask.EnableBit);
GLHelper.PrepareFor3DLineRender(doDepthTest);
world.Render3DLineNoPrep(clippingFrustum, start, end, color, width, startArrow, endArrow);
GL.PopAttrib();
}
/// <summary>
/// Draw a line in the scene in 3D but scale it such that it appears as a 2D line in the view.
/// </summary>
/// <param name="world"></param>
/// <param name="clippingFrustum">This is a cache of the frustum from world.
/// Much faster to pass this way if drawing lots of lines.</param>
/// <param name="start"></param>
/// <param name="end"></param>
/// <param name="color"></param>
/// <param name="doDepthTest"></param>
/// <param name="width"></param>
public static void Render3DLine(this WorldView world, Frustum clippingFrustum, Vector3 start, Vector3 end, Color color, bool doDepthTest = true, double width = 1)
{
GLHelper.PrepareFor3DLineRender(doDepthTest);
world.Render3DLineNoPrep(clippingFrustum, start, end, color, width);
}