diff options
| -rw-r--r-- | libs/hwui/ShadowTessellator.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libs/hwui/ShadowTessellator.cpp b/libs/hwui/ShadowTessellator.cpp index 024ff10..09d1258 100644 --- a/libs/hwui/ShadowTessellator.cpp +++ b/libs/hwui/ShadowTessellator.cpp @@ -21,6 +21,7 @@ #include <utils/Log.h> #include <utils/Trace.h> #include <utils/Vector.h> +#include <utils/MathUtils.h> #include "AmbientShadow.h" #include "Properties.h" @@ -172,6 +173,8 @@ int ShadowTessellator::getExtraVertexNumber(const Vector2& vector1, // acos( ) --- [0, M_PI] // floor(...) --- [0, EXTRA_VERTEX_PER_PI] float dotProduct = vector1.dot(vector2); + // make sure that dotProduct value is in acsof input range [-1, 1] + dotProduct = MathUtils::clamp(dotProduct, -1.0f, 1.0f); // TODO: Use look up table for the dotProduct to extraVerticesNumber // computation, if needed. float angle = acosf(dotProduct); |