public static void DrawWireframe(PrimitiveDrawer primitiveDrawer,
Matrix cameraView, Matrix cameraProjection,
BoundingFrustum frustum, Color color)
{
// The points returned correspond to the corners of the BoundingFrustum faces that are
// perpendicular to the z-axis. The near face is the face with the larger z value, and
// the far face is the face with the smaller z value. Points 0 to 3 correspond to the
// near face in a clockwise order starting at its upper-left corner when looking toward
// the origin from the positive z direction. Points 4 to 7 correspond to the far face
// in a clockwise order starting at its upper-left corner when looking toward the
// origin from the positive z direction.
frustum.GetCorners(Corners);
FrustumVertices[6].Position = Corners[0];
FrustumVertices[7].Position = Corners[1];
FrustumVertices[5].Position = Corners[2];
FrustumVertices[4].Position = Corners[3];
FrustumVertices[2].Position = Corners[4];
FrustumVertices[3].Position = Corners[5];
FrustumVertices[1].Position = Corners[6];
FrustumVertices[0].Position = Corners[7];
primitiveDrawer.Draw(Matrix.Identity, cameraView, cameraProjection, color, null,
PrimitiveType.LineList, FrustumVertices, WireFrustumIndices, false);
}
public static void DrawWireframe(PrimitiveDrawer primitiveDrawer,
Matrix cameraView, Matrix cameraProjection,
BoundingFrustum frustum, Color color)
{
// The points returned correspond to the corners of the BoundingFrustum faces that are
// perpendicular to the z-axis. The near face is the face with the larger z value, and
// the far face is the face with the smaller z value. Points 0 to 3 correspond to the
// near face in a clockwise order starting at its upper-left corner when looking toward
// the origin from the positive z direction. Points 4 to 7 correspond to the far face
// in a clockwise order starting at its upper-left corner when looking toward the
// origin from the positive z direction.
frustum.GetCorners(Corners);
FrustumVertices[6].Position = Corners[0];
FrustumVertices[7].Position = Corners[1];
FrustumVertices[5].Position = Corners[2];
FrustumVertices[4].Position = Corners[3];
FrustumVertices[2].Position = Corners[4];
FrustumVertices[3].Position = Corners[5];
FrustumVertices[1].Position = Corners[6];
FrustumVertices[0].Position = Corners[7];
primitiveDrawer.Draw(Matrix.Identity, cameraView, cameraProjection, color, null,
PrimitiveType.LineList, FrustumVertices, WireFrustumIndices, false);
}
public static void DrawWireframe(PrimitiveDrawer primitiveDrawer, Vector3 cameraPosition, Matrix cameraView, Matrix cameraProjection,
Vector3 center, Vector3 size, Quaternion rotation, Color color)
{
var world = Matrix.CreateScale(size) * Matrix.CreateFromQuaternion(rotation) * Matrix.CreateTranslation(center);
var vertices = new VertexPositionColor[WireframeLines.Length * 2];
for (int i = 0; i < WireframeLines.Length; i++)
{
var transformedLine = WireframeLine.Transform(WireframeLines[i], world);
Vector3 cameraToLine = Vector3.Normalize(((transformedLine.Point1 + transformedLine.Point2) / 2) - cameraPosition);
Color lineColor = color;
if (!IsCameraFacing(cameraToLine, transformedLine.FaceNormal1) && !IsCameraFacing(cameraToLine, transformedLine.FaceNormal2))
{
lineColor = Color.FromNonPremultiplied(color.R, color.G, color.B, 25);
}
vertices[i * 2] = new VertexPositionColor(transformedLine.Point1, lineColor);
vertices[(i * 2) + 1] = new VertexPositionColor(transformedLine.Point2, lineColor);
}
primitiveDrawer.Draw(Matrix.Identity, cameraView, cameraProjection,
Color.White, null, PrimitiveType.LineList, vertices, false);
}
public static void Draw(
PrimitiveDrawer primitiveDrawer, Matrix cameraView, Matrix cameraProjection,
Vector3 start, Vector3 end, Color color)
{
var vertices = new[]
{
new VertexPositionColor(start, Color.White),
new VertexPositionColor(end, Color.White)
};
primitiveDrawer.Draw(Matrix.Identity, cameraView, cameraProjection,
color, null, PrimitiveType.LineList, vertices, false);
}
public static void Draw(
PrimitiveDrawer primitiveDrawer, Matrix cameraView, Matrix cameraProjection,
Vector3 start, Vector3 end, Color color)
{
var vertices = new[]
{
new VertexPositionColor(start, Color.White),
new VertexPositionColor(end, Color.White)
};
primitiveDrawer.Draw(Matrix.Identity, cameraView, cameraProjection,
color, null, PrimitiveType.LineList, vertices, false);
}
public static void DrawSolid(PrimitiveDrawer primitiveDrawer, Matrix cameraView, Matrix cameraProjection,
Vector3[] corners, Color color)
{
if (corners == null || corners.Length != 4)
throw new ArgumentException("corners");
Vertices[0].Position = corners[0];
Vertices[1].Position = corners[1];
Vertices[2].Position = corners[2];
Vertices[3].Position = corners[3];
primitiveDrawer.Draw(Matrix.Identity, cameraView, cameraProjection, color, null,
PrimitiveType.TriangleList, Vertices, SolidIndices, false);
}
public static void DrawWireframe(
PrimitiveDrawer primitiveDrawer, Vector3 cameraPosition,
Matrix cameraView, Matrix cameraProjection,
Vector3 center, Vector3 normal, float radius,
Color color, bool fadeBackFace)
{
// Calculate basis vectors.
Vector3 from = Vector3.Cross(normal, Vector3.Up);
if (from.LengthSquared() < 0.0001f)
{
from = Vector3.Cross(normal, Vector3.Right);
}
from.Normalize();
// We need two vertices per line, so we can allocate our vertices.
const int numSegments = 64;
const int numLines = numSegments + 1;
var vertices = new VertexPositionColor[numLines * 2];
// Calculate initial orientation.
Quaternion rotation = Quaternion.CreateFromAxisAngle(normal, MathHelper.TwoPi / (numSegments - 1));
// Compute vertex positions.
Vector3 edge = from * radius;
for (int i = 0; i < numSegments; i++)
{
// Calculate line positions.
Vector3 start = center + edge;
edge = Vector3.Transform(edge, rotation);
Vector3 end = center + edge;
// Calculate line normal.
Vector3 cameraToEdge = start - cameraPosition;
var lineColor = color;
if (fadeBackFace && Vector3.Dot(cameraToEdge, edge) > 0)
{
lineColor = Color.FromNonPremultiplied(color.R, color.G, color.B, 25);
}
vertices[(i * 2) + 0] = new VertexPositionColor(start, lineColor);
vertices[(i * 2) + 1] = new VertexPositionColor(end, lineColor);
}
primitiveDrawer.Draw(Matrix.Identity, cameraView, cameraProjection,
Color.White, null, PrimitiveType.LineList, vertices, false);
}
public static void DrawSolid(PrimitiveDrawer primitiveDrawer, Matrix cameraView, Matrix cameraProjection,
Vector3[] corners, Color color)
{
if (corners == null || corners.Length != 4)
{
throw new ArgumentException("corners");
}
Vertices[0].Position = corners[0];
Vertices[1].Position = corners[1];
Vertices[2].Position = corners[2];
Vertices[3].Position = corners[3];
primitiveDrawer.Draw(Matrix.Identity, cameraView, cameraProjection, color, null,
PrimitiveType.TriangleList, Vertices, SolidIndices, false);
}
public static void DrawWireframe(
PrimitiveDrawer primitiveDrawer, Vector3 cameraPosition,
Matrix cameraView, Matrix cameraProjection,
Vector3 center, Vector3 normal, float radius,
Color color, bool fadeBackFace)
{
// Calculate basis vectors.
Vector3 from = Vector3.Cross(normal, Vector3.Up);
if (from.LengthSquared() < 0.0001f)
from = Vector3.Cross(normal, Vector3.Right);
from.Normalize();
// We need two vertices per line, so we can allocate our vertices.
const int numSegments = 64;
const int numLines = numSegments + 1;
var vertices = new VertexPositionColor[numLines * 2];
// Calculate initial orientation.
Quaternion rotation = Quaternion.CreateFromAxisAngle(normal, MathHelper.TwoPi / (numSegments - 1));
// Compute vertex positions.
Vector3 edge = from * radius;
for (int i = 0; i < numSegments; i++)
{
// Calculate line positions.
Vector3 start = center + edge;
edge = Vector3.Transform(edge, rotation);
Vector3 end = center + edge;
// Calculate line normal.
Vector3 cameraToEdge = start - cameraPosition;
var lineColor = color;
if (fadeBackFace && Vector3.Dot(cameraToEdge, edge) > 0)
lineColor = Color.FromNonPremultiplied(color.R, color.G, color.B, 25);
vertices[(i * 2) + 0] = new VertexPositionColor(start, lineColor);
vertices[(i * 2) + 1] = new VertexPositionColor(end, lineColor);
}
primitiveDrawer.Draw(Matrix.Identity, cameraView, cameraProjection,
Color.White, null, PrimitiveType.LineList, vertices, false);
}
public static void DrawWireframe(PrimitiveDrawer primitiveDrawer, Vector3 cameraPosition, Matrix cameraView, Matrix cameraProjection,
Vector3 center, Vector3 size, Quaternion rotation, Color color)
{
var world = Matrix.CreateScale(size) * Matrix.CreateFromQuaternion(rotation) * Matrix.CreateTranslation(center);
var vertices = new VertexPositionColor[WireframeLines.Length * 2];
for (int i = 0; i < WireframeLines.Length; i++)
{
var transformedLine = WireframeLine.Transform(WireframeLines[i], world);
Vector3 cameraToLine = Vector3.Normalize(((transformedLine.Point1 + transformedLine.Point2) / 2) - cameraPosition);
Color lineColor = color;
if (!IsCameraFacing(cameraToLine, transformedLine.FaceNormal1) && !IsCameraFacing(cameraToLine, transformedLine.FaceNormal2))
lineColor = Color.FromNonPremultiplied(color.R, color.G, color.B, 25);
vertices[i * 2] = new VertexPositionColor(transformedLine.Point1, lineColor);
vertices[(i * 2) + 1] = new VertexPositionColor(transformedLine.Point2, lineColor);
}
primitiveDrawer.Draw(Matrix.Identity, cameraView, cameraProjection,
Color.White, null, PrimitiveType.LineList, vertices, false);
}
