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Don't need local to track if all edges were outside.

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This commit is contained in:
Nathan Sweet 2017-04-06 18:09:01 +09:00
parent 3adaf1b9ac
commit e334d7a27a
1 changed files with 3 additions and 7 deletions
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10
spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/utils/Clipper.java
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@ -69,8 +69,7 @@ public class Clipper {
float deltaX = edgeX - edgeX2, deltaY = edgeY - edgeY2; float deltaX = edgeX - edgeX2, deltaY = edgeY - edgeY2;
float[] inputVertices = input.items; float[] inputVertices = input.items;
int inputVerticesLength = input.size - 2; int inputVerticesLength = input.size - 2, outputStart = output.size;
int numOutside = 0;
for (int ii = 0; ii < inputVerticesLength; ii += 2) { for (int ii = 0; ii < inputVerticesLength; ii += 2) {
float inputX = inputVertices[ii], inputY = inputVertices[ii + 1]; float inputX = inputVertices[ii], inputY = inputVertices[ii + 1];
float inputX2 = inputVertices[ii + 2], inputY2 = inputVertices[ii + 3]; float inputX2 = inputVertices[ii + 2], inputY2 = inputVertices[ii + 3];
@ -90,9 +89,7 @@ public class Clipper {
clipped = true; clipped = true;
} }
} else { } else {
if (side2 < 0) // v1 outside, v2 outside: no output if (side2 >= 0) { // v1 outside, v2 inside
numOutside += 2;
else { // v1 outside, v2 inside
float c0 = inputY2 - inputY, c2 = inputX2 - inputX; float c0 = inputY2 - inputY, c2 = inputX2 - inputX;
float d = c0 * (edgeX2 - edgeX) - c2 * (edgeY2 - edgeY); float d = c0 * (edgeX2 - edgeX) - c2 * (edgeY2 - edgeY);
float ua = (c2 * (edgeY - inputY) - c0 * (edgeX - inputX)) / d; float ua = (c2 * (edgeY - inputY) - c0 * (edgeX - inputX)) / d;
@ -105,8 +102,7 @@ public class Clipper {
} }
} }
// Early out if all edges were outside. if (outputStart == output.size) { // All edges were outside.
if (numOutside == inputVerticesLength) {
originalOutput.clear(); originalOutput.clear();
return true; return true;
} }