pmconne
commented
1 year ago Example
To exaggerate the effect in the above example, edit edgeWidth and edgeColor as follows:
clippingPlanes = new Cesium.ClippingPlaneCollection({
planes: [
new Cesium.ClippingPlane(
new Cesium.Cartesian3(0.0, 0.0, -1.0),
0.0
),
],
edgeWidth: viewModel.edgeStylingEnabled ? 5.0 : 0.0,
edgeColor: Cesium.Color.RED,
});The glsl ought to be dead simple: compute min distance of fragment to any plane (in pixels, not meters - may need to convert).
Probably add to ClipStyleProps something like:
intersectStyle?: {
color?: ColorDefProps; // default white
width?: number; // in pixels, default 1
}
markschlosseratbentley
Allow section cuts to change the color for better visibility.
In the clipping fragment shader, if a fragment is within a certain distance of clip plane, instead of discarding it, change its color - color and distance being configurable.
This will result in colorizing geometry that is near the clip plane, emphasizing where the cut is happening.
For example, here is a manually edited screenshot of a public iModel where a clip plane is applied to the scene, but the circled area has geometry that is "cut" showing up as red because it is very near the clip plane. Note: this is just for illustration purposes! It would look better done for real, not done manually.