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[libgdx] Early out if all edges of a triangle are outside the clip region

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This commit is contained in:
badlogic 2017-03-28 18:16:45 +02:00
parent 242eaf2bcc
commit 7245115a63
1 changed files with 9 additions and 0 deletions
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9
spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/utils/SutherlandHodgmanClipper.java
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@ -45,6 +45,8 @@ public class SutherlandHodgmanClipper {
final float[] inputVertices = input.items; final float[] inputVertices = input.items;
final int inputVerticesLength = input.size - 2; final int inputVerticesLength = input.size - 2;
int numOutside = 0;
for (int j = 0; j < inputVerticesLength; j += 2) { for (int j = 0; j < inputVerticesLength; j += 2) {
final float inputX = inputVertices[j]; final float inputX = inputVertices[j];
@ -71,6 +73,7 @@ public class SutherlandHodgmanClipper {
if (side2 < 0) { if (side2 < 0) {
// no output // no output
clipped = true; clipped = true;
numOutside += 2;
} }
// v1 outside, v2 inside // v1 outside, v2 inside
else { else {
@ -81,6 +84,12 @@ public class SutherlandHodgmanClipper {
} }
} }
} }
// early out if all edges were outside
if (numOutside == inputVerticesLength) {
originalOutput.clear();
return true;
}
output.add(output.items[0]); output.add(output.items[0]);
output.add(output.items[1]); output.add(output.items[1]);