1 files changed, 45 insertions, 0 deletions
diff --git a/src/demos/xtrans/InterpolatedQuad2f.java b/src/demos/xtrans/InterpolatedQuad2f.java
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+++ b/src/demos/xtrans/InterpolatedQuad2f.java
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+package demos.xtrans;
+
+import gleem.linalg.*;
+
+/** A quadrilateral of two-dimensional floating-point values which
+    interpolates between specified start and end values. */
+
+public class InterpolatedQuad2f {
+  private Quad2f start;
+  private Quad2f end;
+
+  /** Constructs a new InterpolatedQuad2f. By default both the start
+      and end quadrilaterals have all of their points set to the
+      origin. */
+  public InterpolatedQuad2f() {
+    start = new Quad2f();
+    end = new Quad2f();
+  }
+
+  /** Returns the starting value for the interpolation. */
+  public Quad2f getStart() {
+    return start;
+  }
+
+  /** Sets the starting value for the interpolation. */
+  public void setStart(Quad2f quad) {
+    start.set(quad);
+  }
+
+  /** Returns the ending value for the interpolation. */
+  public Quad2f getEnd() {
+    return end;
+  }
+
+  /** Sets the ending value for the interpolation. */
+  public void setEnd(Quad2f quad) {
+    end.set(quad);
+  }
+
+  /** Gets the current interpolated value at the specified fraction of
+      interpolation (0.0 - 1.0). */
+  public Quad2f getCurrent(float fraction) {
+    return start.times(1.0f - fraction).plus(end.times(fraction));
+  }
+}