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[c] Ported IKConstraint simplification, see #907

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This commit is contained in:
badlogic 2017-05-24 11:45:10 +02:00
parent 0041378267
commit 4a3e12c75f
1 changed files with 2 additions and 14 deletions
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16
spine-c/spine-c/src/spine/IkConstraint.c
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@ -150,8 +150,8 @@ void spIkConstraint_apply2 (spBone* parent, spBone* child, float targetX, float
float aa = a * a, bb = b * b, ll = l1 * l1, dd = tx * tx + ty * ty, ta = ATAN2(ty, tx);
float c0 = bb * ll + aa * dd - aa * bb, c1 = -2 * bb * l1, c2 = bb - aa;
float d = c1 * c1 - 4 * c2 * c0;
float minAngle = 0, minDist = FLT_MAX, minX = 0, minY = 0;
float maxAngle = 0, maxDist = 0, maxX = 0, maxY = 0;
float minAngle = PI, minX = l1 - a, minDist = minX * minX, minY = 0;
float maxAngle = 0, maxX = l1 + a, maxDist = maxX * maxX, maxY = 0;
float x = l1 + a, dist = x * x, angle, y;
if (d >= 0) {
float q = SQRT(d), r0, r1;
@ -166,18 +166,6 @@ void spIkConstraint_apply2 (spBone* parent, spBone* child, float targetX, float
goto outer;
}
}
if (dist > maxDist) {
maxAngle = 0;
maxDist = dist;
maxX = x;
}
x = l1 - a;
dist = x * x;
if (dist < minDist) {
minAngle = PI;
minDist = dist;
minX = x;
}
angle = ACOS(-a * l1 / (aa - bb));
x = a * COS(angle) + l1;
y = b * SIN(angle);