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authorDan Goodliffe <dan@randomdan.homeip.net>2024-03-23 21:41:10 +0000
committerDan Goodliffe <dan@randomdan.homeip.net>2024-03-23 21:41:10 +0000
commitf380b20ddf1ead6447a6ee6e137a14c4aa226c12 (patch)
treea654a3a219811df7d645683f6fac5697ffd1c776 /game/geoData.cpp
parentCreate extents purely from corner arcs (diff)
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Handle and test concave surface boundaries
Diffstat (limited to 'game/geoData.cpp')
-rw-r--r--game/geoData.cpp19
1 files changed, 14 insertions, 5 deletions
diff --git a/game/geoData.cpp b/game/geoData.cpp
index 80a4eba..30c382c 100644
--- a/game/geoData.cpp
+++ b/game/geoData.cpp
@@ -446,11 +446,20 @@ GeoData::setHeights(const std::span<const GlobalPosition3D> triangleStrip)
return extrusionDir;
};
// Previous half edge end to current half end start arc tangents
- const Arc arc {e0, e1};
- const auto limit = std::ceil(arc.length() * 5.F / pi);
- const auto inc = arc.length() / limit;
- for (float step = 0; step <= limit; step += 1.F) {
- const auto direction = sincosf(arc.first + (step * inc));
+ if (const Arc arc {e0, e1}; arc.length() < pi) {
+ const auto limit = std::ceil(arc.length() * 5.F / pi);
+ const auto inc = arc.length() / limit;
+ for (float step = 0; step <= limit; step += 1.F) {
+ const auto direction = sincosf(arc.first + (step * inc));
+ VertexHandle extrusionVertex;
+ extrusionExtents.emplace_back(boundaryVertex, extrusionVertex,
+ doExtrusion(extrusionVertex, direction, p1, -MAX_SLOPE),
+ doExtrusion(extrusionVertex, direction, p1, MAX_SLOPE));
+ assert(extrusionVertex.is_valid());
+ }
+ }
+ else {
+ const auto direction = normalize(e0 + e1) / sinf((arc.length() - pi) / 2.F);
VertexHandle extrusionVertex;
extrusionExtents.emplace_back(boundaryVertex, extrusionVertex,
doExtrusion(extrusionVertex, direction, p1, -MAX_SLOPE),