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Clamp the fixed-point network values to their limits

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Simon Walton 2018-11-02 11:52:40 -07:00
parent db87fe9696
commit e64557a46c
1 changed files with 6 additions and 3 deletions
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9
libraries/shared/src/GLMHelpers.cpp
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@ -9,6 +9,7 @@
// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html // See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
// //
#include <limits>
#include "GLMHelpers.h" #include "GLMHelpers.h"
#include <glm/gtc/matrix_transform.hpp> #include <glm/gtc/matrix_transform.hpp>
#include "NumericalConstants.h" #include "NumericalConstants.h"
@ -76,9 +77,11 @@ glm::quat safeMix(const glm::quat& q1, const glm::quat& q2, float proportion) {
// Allows sending of fixed-point numbers: radix 1 makes 15.1 number, radix 8 makes 8.8 number, etc // Allows sending of fixed-point numbers: radix 1 makes 15.1 number, radix 8 makes 8.8 number, etc
int packFloatScalarToSignedTwoByteFixed(unsigned char* buffer, float scalar, int radix) { int packFloatScalarToSignedTwoByteFixed(unsigned char* buffer, float scalar, int radix) {
int16_t twoByteFixed = (int16_t)(scalar * (float)(1 << radix)); using FixedType = int16_t;
memcpy(buffer, &twoByteFixed, sizeof(int16_t)); FixedType twoByteFixed = (FixedType) glm::clamp(scalar * (1 << radix), (float)std::numeric_limits<FixedType>::min(),
return sizeof(int16_t); (float)std::numeric_limits<FixedType>::max());
memcpy(buffer, &twoByteFixed, sizeof(FixedType));
return sizeof(FixedType);
} }
int unpackFloatScalarFromSignedTwoByteFixed(const int16_t* byteFixedPointer, float* destinationPointer, int radix) { int unpackFloatScalarFromSignedTwoByteFixed(const int16_t* byteFixedPointer, float* destinationPointer, int radix) {