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 WireframeLine Transform(WireframeLine line, Matrix matrix)
{
return(new WireframeLine(
Vector3.Transform(line.Point1, matrix),
Vector3.Transform(line.Point2, matrix),
Vector3.Normalize(Vector3.TransformNormal(line.FaceNormal1, matrix)),
Vector3.Normalize(Vector3.TransformNormal(line.FaceNormal2, matrix))));
}
public static WireframeLine Transform(WireframeLine line, Matrix matrix)
{
return new WireframeLine(
Vector3.Transform(line.Point1, matrix),
Vector3.Transform(line.Point2, matrix),
Vector3.Normalize(Vector3.TransformNormal(line.FaceNormal1, matrix)),
Vector3.Normalize(Vector3.TransformNormal(line.FaceNormal2, matrix)));
}
