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Add rotation and backface culling

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Also, correctly update the thumbnail when leaving the visualization
editor.
This commit is contained in:
Andy McFadden
2020-03-06 16:51:47 -08:00
parent eec847d5f1
commit b686d2d208
11 changed files with 304 additions and 52 deletions
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13
SourceGen/Visualization.cs
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@@ -37,6 +37,8 @@ namespace SourceGen {
/// that weren't changed while sitting in the undo buffer.
/// </remarks>
public class Visualization {
public const double THUMBNAIL_DIM = 64;
/// <summary>
/// Unique user-specified tag. This may be any valid string that is at least two
/// characters long after the leading and trailing whitespace have been trimmed.
@@ -181,7 +183,7 @@ namespace SourceGen {
ReadOnlyDictionary<string, object> parms) {
Debug.Assert(visWire != null);
Debug.Assert(parms != null);
CachedImage = GenerateWireframeImage(visWire, parms, 64);
CachedImage = GenerateWireframeImage(visWire, parms, THUMBNAIL_DIM);
}
/// <summary>
@@ -322,7 +324,6 @@ namespace SourceGen {
// bounds, then draw lines with coordinates from 0.5 to 7.5.
GeometryGroup geo = new GeometryGroup();
Debug.WriteLine("using max=" + dim);
// Draw invisible line segments to establish Path bounds.
Point topLeft = new Point(0, 0);
@@ -330,12 +331,14 @@ namespace SourceGen {
geo.Children.Add(new LineGeometry(topLeft, topLeft));
geo.Children.Add(new LineGeometry(botRight, botRight));
// Generate a list of clip-space line segments. Coordinate values are [-1,1].
// Generate a list of clip-space line segments. Coordinate values are in the
// range [-1,1], with +X to the right and +Y upward.
WireframeObject wireObj = WireframeObject.Create(visWire);
List<WireframeObject.LineSeg> segs = wireObj.Generate(parms);
// Convert clip-space coords to screen. We need to scale up, round them to the
// nearest whole pixel, and add +0.5 to make the thumbnails look crisp.
// Convert clip-space coords to screen. We need to translate to [0,2] with +Y
// toward the bottom of the screen, scale up, round to the nearest whole pixel,
// and add +0.5 to make thumbnail-size bitmaps look crisp.
double scale = (dim - 0.5) / 2;
double adj = 0.5;
foreach (WireframeObject.LineSeg seg in segs) {