Fix the (0,0) vector case for extra vertices computation
TODO: Figure out why we have collided vertices from input polygon.
b/17340792
Change-Id: I6636ff957ef17514bd11cf290ccc0a2c302aca0b
diff --git a/libs/hwui/AmbientShadow.cpp b/libs/hwui/AmbientShadow.cpp
index 7834ef8..4873479 100644
--- a/libs/hwui/AmbientShadow.cpp
+++ b/libs/hwui/AmbientShadow.cpp
@@ -93,6 +93,10 @@
inline int getExtraVertexNumber(const Vector2& vector1, const Vector2& vector2,
float divisor) {
+ // When there is no distance difference, there is no need for extra vertices.
+ if (vector1.lengthSquared() == 0 || vector2.lengthSquared() == 0) {
+ return 0;
+ }
// The formula is :
// extraNumber = floor(acos(dot(n1, n2)) / (M_PI / EXTRA_VERTEX_PER_PI))
// The value ranges for each step are:
