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Timeline binary search for stride 2.

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This commit is contained in:
NathanSweet 2019-10-29 21:54:46 +01:00
parent 07bd8451f4
commit 72f6943970
2 changed files with 46 additions and 23 deletions
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67
spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/Animation.java
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@ -114,24 +114,8 @@ public class Animation {
return name;
}
/** @param target After the first and before the last value.
* @return index of first value greater than the target. */
static int binarySearch (float[] values, float target, int step) {
int low = 0;
int high = values.length / step - 2;
if (high == 0) return step;
int current = high >>> 1;
while (true) {
if (values[(current + 1) * step] <= target)
low = current + 1;
else
high = current;
if (low == high) return (low + 1) * step;
current = (low + high) >>> 1;
}
}
/** @param target After the first and before the last value.
/** Binary search using a stride of 1.
* @param target After the first and before the last value.
* @return index of first value greater than the target. */
static int binarySearch (float[] values, float target) {
int low = 0;
@ -148,10 +132,49 @@ public class Animation {
}
}
/** Binary search using a stride of 2.
* @param target After the first and before the last value.
* @return index of first value greater than the target. */
static int binarySearch2 (float[] values, float target) {
int low = 0;
int high = (values.length >> 1) - 2;
if (high == 0) return 2;
int current = high >>> 1;
while (true) {
if (values[(current + 1) << 1] <= target)
low = current + 1;
else
high = current;
if (low == high) return (low + 1) << 1;
current = (low + high) >>> 1;
}
}
/** Binary search using the specified stride.
* @param target After the first and before the last value.
* @return index of first value greater than the target. */
static int binarySearch (float[] values, float target, int step) {
int low = 0;
int high = values.length / step - 2;
if (high == 0) return step;
int current = high >>> 1;
while (true) {
if (values[(current + 1) * step] <= target)
low = current + 1;
else
high = current;
if (low == high) return (low + 1) * step;
current = (low + high) >>> 1;
}
}
/** Linear search using the specified stride. Not used, but for comparison with binary searches.
* @param target After the first and before the last value.
* @return index of first value greater than the target. */
static int linearSearch (float[] values, float target, int step) {
for (int i = 0, last = values.length - step; i <= last; i += step)
if (values[i] > target) return i;
return -1;
return step;
}
/** Controls how a timeline value is mixed with the setup pose value or current pose value when a timeline's <code>alpha</code>
@ -520,7 +543,7 @@ public class Animation {
}
// Interpolate between the previous frame and the current frame.
int frame = binarySearch(frames, time, ENTRIES);
int frame = binarySearch2(frames, time);
float r = getCurveValue((frame >> 1) - 1, time, //
frames[frame + PREV_TIME], frames[frame + PREV_VALUE], //
frames[frame], frames[frame + VALUE]);
@ -1600,7 +1623,7 @@ public class Animation {
position = frames[frames.length + PREV_VALUE];
else {
// Interpolate between the previous frame and the current frame.
int frame = binarySearch(frames, time, ENTRIES);
int frame = binarySearch2(frames, time);
position = getCurveValue((frame >> 1) - 1, time, //
frames[frame + PREV_TIME], frames[frame + PREV_VALUE], //
frames[frame], frames[frame + VALUE]);
@ -1649,7 +1672,7 @@ public class Animation {
spacing = frames[frames.length + PREV_VALUE];
else {
// Interpolate between the previous frame and the current frame.
int frame = binarySearch(frames, time, ENTRIES);
int frame = binarySearch2(frames, time);
spacing = getCurveValue((frame >> 1) - 1, time, //
frames[frame + PREV_TIME], frames[frame + PREV_VALUE], //
frames[frame], frames[frame + VALUE]);

2
spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/AnimationState.java
View File

@ -370,7 +370,7 @@ public class AnimationState {
r2 = bone.data.rotation + frames[frames.length + PREV_VALUE];
else {
// Interpolate between the previous frame and the current frame.
int frame = Animation.binarySearch(frames, time, ENTRIES);
int frame = Animation.binarySearch2(frames, time);
r2 = bone.data.rotation + timeline.getCurveValue((frame >> 1) - 1, time, //
frames[frame + PREV_TIME], frames[frame + PREV_VALUE], //
frames[frame], frames[frame + VALUE]);