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avoid div by zero

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This commit is contained in:
Seth Alves 2019-06-04 12:53:12 -07:00
parent d1824c4d6d
commit 426f97fb35
1 changed files with 5 additions and 1 deletions
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6
libraries/avatars-renderer/src/avatars-renderer/Head.cpp
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@ -230,7 +230,11 @@ void Head::applyEyelidOffset(glm::quat headOrientation) {
const float OPEN_DOWN_MULTIPLIER = 0.3f;
const float BROW_UP_MULTIPLIER = 0.5f;
glm::vec3 lookAt = glm::normalize(getLookAtPosition() - _eyePosition);
glm::vec3 lookAtVector = getLookAtPosition() - _eyePosition;
if (glm::length2(lookAtVector) == 0.0f) {
return;
}
glm::vec3 lookAt = glm::normalize(lookAtVector);
glm::vec3 headUp = headOrientation * Vectors::UNIT_Y;
float eyePitch = (PI / 2.0f) - acos(glm::dot(lookAt, headUp));
float eyelidOffset = glm::clamp(abs(eyePitch * EYE_PITCH_TO_COEFFICIENT), 0.0f, MAX_EYELID_OFFSET);