checkpoint autogen tile

[anneal.git] / src / edu / berkeley / qfat / geom / HalfSpace.java

diff --git a/src/edu/berkeley/qfat/geom/HalfSpace.java b/src/edu/berkeley/qfat/geom/HalfSpace.java
new file mode 100644 (file)
index 0000000..ebbd796
--- /dev/null
+++ b/src/edu/berkeley/qfat/geom/HalfSpace.java
@@ -0,0 +1,36 @@
+package edu.berkeley.qfat.geom;
+import javax.media.opengl.*;
+
+public final class HalfSpace extends Plane {
+
+    public HalfSpace(Point p, Vec norm) { super(p, norm); }
+
+    /*
+    public Segment clip(Segment s) {
+        // FIXME: return null if segment is entirely excluded
+        throw new Error();
+    }
+
+
+    public Point intersect(Segment s) {
+    }
+
+    public HalfPlane intersect(Plane p) {
+        if (norm.minus(hs.norm).mag() < 0.001)
+            throw new Error("half-spaces are nearly parallel");
+        
+    }
+    */
+
+    public boolean contains(Point p) {
+        float checker = p.x*norm.x+p.y*norm.y+p.z*norm.z + dvalue;
+        //System.out.println(norm+" "+dvalue+" contains " + p + " => " + checker);
+        return checker <= 0.00001;
+    }
+
+    public boolean contains(HalfSpace hs) {
+        // FIXME
+        return false;
+    }
+    
+}