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Commit 26131368 authored by ztenghui's avatar ztenghui
Browse files

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
parent c8316dfc

libs/hwui/AmbientShadow.cpp

+4 −0
Original line number Diff line number Diff line
@@ -93,6 +93,10 @@ inline float getTransformedAlphaFromFactoredZ(float factoredZ) { 


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: