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Diffstat (limited to 'src/demos/xtrans/Quad2f.java')
-rwxr-xr-x | src/demos/xtrans/Quad2f.java | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/demos/xtrans/Quad2f.java b/src/demos/xtrans/Quad2f.java new file mode 100755 index 0000000..008c3df --- /dev/null +++ b/src/demos/xtrans/Quad2f.java @@ -0,0 +1,74 @@ +package demos.xtrans; + +import gleem.linalg.*; + +/** A quadrilateral in which the vertices are two-dimensional + floating-point values. */ + +public class Quad2f { + private Vec2f[] vecs; + + public static final int UPPER_LEFT = 0; + public static final int LOWER_LEFT = 1; + public static final int LOWER_RIGHT = 2; + public static final int UPPER_RIGHT = 2; + + private static final int NUM_VECS = 4; + + /** Constructs a Quad2f in which all the vertices are set to the + origin. */ + public Quad2f() { + vecs = new Vec2f[NUM_VECS]; + for (int i = 0; i < NUM_VECS; i++) { + vecs[i] = new Vec2f(); + } + } + + /** Constructs a Quad2f in which the vertices are set to the + specified values. */ + public Quad2f(Vec2f upperLeft, + Vec2f lowerLeft, + Vec2f lowerRight, + Vec2f upperRight) { + this(); + setVec(0, upperLeft); + setVec(1, lowerLeft); + setVec(2, lowerRight); + setVec(3, upperRight); + } + + /** Sets the specified vertex to the specified value. */ + public void setVec(int which, Vec2f val) { + vecs[which].set(val); + } + + /** Returns the specified vertex. */ + public Vec2f getVec(int which) { + return vecs[which]; + } + + /** Sets all four points of this quadrilateral. */ + public void set(Quad2f quad) { + for (int i = 0; i < NUM_VECS; i++) { + setVec(i, quad.getVec(i)); + } + } + + /** Returns a newly-constructed Quad2f in which all vertices have + been multiplied in scalar fashion by the passed value. */ + public Quad2f times(float val) { + return new Quad2f(getVec(0).times(val), + getVec(1).times(val), + getVec(2).times(val), + getVec(3).times(val)); + } + + /** Returns a newly-constructed Quad2f in which the vertices are the + component-wise sums of this quad and the passed quad. */ + public Quad2f plus(Quad2f val) { + return new Quad2f(getVec(0).plus(val.getVec(0)), + getVec(1).plus(val.getVec(1)), + getVec(2).plus(val.getVec(2)), + getVec(3).plus(val.getVec(3))); + } +} |