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[c] Fixed _isNan. VC++ evaluates 0/0 at compile time and errors out with C2124 as the constant is a division by zero.

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badlogic 2017-04-19 15:08:33 +02:00
parent 686b2b551d
commit 69711476fc
1 changed files with 4 additions and 3 deletions
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7
spine-c/spine-c/src/spine/PathConstraint.c
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@ -198,8 +198,9 @@ static void _addAfterPosition (float p, float* temp, int i, float* out, int o) {
out[o + 2] = r;
}
static int _isNan(float value) {
float _nan = (float)0.0/(float)0.0;
// Need to pass 0 as an argument, so VC++ doesn't error with C2124
static int _isNan(float value, float zero) {
float _nan = (float)0.0 / zero;
return 0 == memcmp((void*)&value, (void*)&_nan, sizeof(value));
}
@ -208,7 +209,7 @@ static void _addCurvePosition (float p, float x1, float y1, float cx1, float cy1
float tt, ttt, u, uu, uuu;
float ut, ut3, uut3, utt3;
float x, y;
if (p == 0 || _isNan(p)) p = 0.0001f;
if (p == 0 || _isNan(p, 0)) p = 0.0001f;
tt = p * p, ttt = tt * p, u = 1 - p, uu = u * u, uuu = uu * u;
ut = u * p, ut3 = ut * 3, uut3 = u * ut3, utt3 = ut3 * p;
x = x1 * uuu + cx1 * uut3 + cx2 * utt3 + x2 * ttt, y = y1 * uuu + cy1 * uut3 + cy2 * utt3 + y2 * ttt;