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-rw-r--r--src/jogl/classes/com/jogamp/opengl/math/geom/Frustum.java49
1 files changed, 43 insertions, 6 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/math/geom/Frustum.java b/src/jogl/classes/com/jogamp/opengl/math/geom/Frustum.java
index 1b732e51b..fd370dfba 100644
--- a/src/jogl/classes/com/jogamp/opengl/math/geom/Frustum.java
+++ b/src/jogl/classes/com/jogamp/opengl/math/geom/Frustum.java
@@ -225,7 +225,7 @@ public class Frustum {
}
}
- private static final boolean quickClassify(Plane p, AABBox box) {
+ private static final boolean isOutsideImpl(Plane p, AABBox box) {
final float[] low = box.getLow();
final float[] high = box.getHigh();
@@ -237,20 +237,20 @@ public class Frustum {
p.distanceTo(high[0], low[1], high[2]) > 0.0f ||
p.distanceTo(low[0], high[1], high[2]) > 0.0f ||
p.distanceTo(high[0], high[1], high[2]) > 0.0f ) {
- return true;
+ return false;
}
- return false;
+ return true;
}
/**
- * Quick check to see if an orthogonal bounding box is completly outside of the frustum.
+ * Check to see if an orthogonal bounding box is completly outside of the frustum.
* <p>
- * Note: If method returns false, the box may be only partially inside.
+ * Note: If method returns false, the box may only be partially inside.
* </p>
*/
public final boolean isOutside(AABBox box) {
for (int i = 0; i < 6; ++i) {
- if (!quickClassify(planes[i], box)) {
+ if ( isOutsideImpl(planes[i], box) ) {
// fully outside
return true;
}
@@ -259,6 +259,43 @@ public class Frustum {
return false;
}
+
+ /**
+ * Check to see if a point is outside of the frustum.
+ */
+ public final boolean isOutside(float[] p) {
+ for (int i = 0; i < 6; ++i) {
+ if ( planes[i].distanceTo(p) < 0.0f ) {
+ // outside
+ return true;
+ }
+ }
+ // inside
+ return false;
+ }
+
+ /**
+ * Check to see if a sphere is outside, intersecting or inside of the frustum.
+ *
+ * @param p center of the sphere
+ * @param radius radius of the sphere
+ * @return 1 if outside, -1 if intersects, 0 if inside
+ */
+ public final int isOutside(float[] p, float radius) {
+ for (int i = 0; i < 6; ++i) {
+ final float d = planes[i].distanceTo(p);
+ if ( d > radius ) {
+ // fully outside
+ return 1;
+ } else if (d < radius ) {
+ // intersecting
+ return -1;
+ }
+ }
+ // fully inside
+ return 0;
+ }
+
public StringBuilder toString(StringBuilder sb) {
if( null == sb ) {
sb = new StringBuilder();