1 files changed, 191 insertions, 0 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/util/Frustum2.java b/src/jogl/classes/com/jogamp/opengl/util/Frustum2.java
new file mode 100644
index 000000000..0e115d1a2
--- /dev/null
+++ b/src/jogl/classes/com/jogamp/opengl/util/Frustum2.java
@@ -0,0 +1,191 @@
+package com.jogamp.opengl.util;
+
+import java.nio.FloatBuffer;
+
+// import org.openmali.spatial.bodies.Box;
+// import org.openmali.spatial.bodies.Classifier;
+// import org.openmali.vecmath2.Matrix4f;
+
+public class Frustum2 {
+	protected Plane[] planes = new Plane[6];
+	protected PMVMatrix pmvMatrix;
+	protected FloatBuffer pmv = FloatBuffer.allocate(16);
+	protected int pmvOffset;
+
+	public Frustum2(PMVMatrix matrix) {
+		setMatrix(matrix);
+		for (int i = 0; i < 6; ++i) {
+			planes[i] = new Plane();
+		}
+	}
+
+	public void setMatrix(PMVMatrix matrix) {
+		this.pmvMatrix = matrix;
+		// pmv = pmvMatrix.glGetPMvMatrixf();
+		// pmvOffset = pmv.position();
+		makePmvMatrix();
+	}
+
+	protected Matrix4f proj;
+	protected Matrix4f modl;
+
+	private FloatBuffer b;
+	private int bOffset;
+
+	private float f(int offset) {
+		return b.get(bOffset + offset);
+	}
+
+	private Matrix4f getMatrix4f(FloatBuffer b) {
+		this.b = b;
+		bOffset = b.position();
+		return new Matrix4f(f(0), f(1), f(2), f(3), f(4), f(5), f(6)/* 12 */, f(7), f(8), f(9), f(10), f(11), f(12),
+				f(13), f(14), f(15));
+	}
+
+	public void makePmvMatrix() {
+		getMatrix4f(pmvMatrix.glGetMvMatrixf()).mul(getMatrix4f(pmvMatrix.glGetPMatrixf())).writeToBuffer(pmv, true,
+				false);
+	}
+
+	protected class Vector3f {
+		public float x;
+		public float y;
+		public float z;
+
+		@Override
+		public String toString() {
+			return "{" + x + "," + y + "," + z + "}";
+		}
+	}
+
+	protected class Plane {
+		public Vector3f n = new Vector3f();
+		public float d;
+
+		public final float distanceTo(float x, float y, float z) {
+			return (n.x * x) + (n.y * y) + (n.z * z) + d;
+		}
+
+		@Override
+		public String toString() {
+			return "Plane[" + n + ", " + d + "]";
+		}
+	}
+
+	protected float[] getMatrixFloat(FloatBuffer b) {
+		if (pmvMatrix.usesBackingArray()) {
+			return b.array();
+		} else {
+			int p = b.position();
+			float[] pm = new float[16];
+			b.get(pm, p, 16);
+			b.position(p);
+			return pm;
+		}
+	}
+
+	protected float m(int a) {
+		return pmv.get(a);
+	}
+
+	private static final boolean quickClassify(Plane p, Box box) {
+		if (p.distanceTo(box.getLowerX(), box.getLowerY(), box.getLowerZ()) > 0.0f)
+			return (true);
+		if (p.distanceTo(box.getUpperX(), box.getLowerY(), box.getLowerZ()) > 0.0f)
+			return (true);
+		if (p.distanceTo(box.getLowerX(), box.getUpperY(), box.getLowerZ()) > 0.0f)
+			return (true);
+		if (p.distanceTo(box.getUpperX(), box.getUpperY(), box.getLowerZ()) > 0.0f)
+			return (true);
+		if (p.distanceTo(box.getLowerX(), box.getLowerY(), box.getUpperZ()) > 0.0f)
+			return (true);
+		if (p.distanceTo(box.getUpperX(), box.getLowerY(), box.getUpperZ()) > 0.0f)
+			return (true);
+		if (p.distanceTo(box.getLowerX(), box.getUpperY(), box.getUpperZ()) > 0.0f)
+			return (true);
+		if (p.distanceTo(box.getUpperX(), box.getUpperY(), box.getUpperZ()) > 0.0f)
+			return (true);
+
+		return (false);
+	}
+
+	/**
+	 * Quick check to see if an orthogonal bounding box is inside the frustum
+	 */
+	public final Classifier.Classification quickClassify(Box box) {
+		for (int i = 0; i < 6; ++i) {
+			if (!quickClassify(planes[i], box))
+				return (Classifier.Classification.OUTSIDE);
+		}
+
+		// We make no attempt to determine whether it's fully inside or not.
+		return (Classifier.Classification.SPANNING);
+	}
+
+	protected float[] mat = new float[16];
+
+	public void compute() {
+		// Left: [30+00, 31+01, 32+02, 33+03]
+		// comboMatrix.m[12] + comboMatrix.m[0];
+
+		planes[0].n.x = m(12) + m(0);
+		planes[0].n.y = m(13) + m(1);
+		planes[0].n.z = m(14) + m(2);
+		planes[0].d = m(15) + m(3);
+
+		// Right: [30-00, 31-01, 32-02, 33-03]
+
+		planes[1].n.x = m(12) - m(0);
+		planes[1].n.y = m(13) - m(1);
+		planes[1].n.z = m(14) - m(2);
+		planes[1].d = m(15) - m(3);
+
+		// Bottom: [30+10, 31+11, 32+12, 33+13]
+
+		planes[2].n.x = m(12) + m(4);
+		planes[2].n.y = m(13) + m(5);
+		planes[2].n.z = m(14) + m(6);
+		planes[2].d = m(15) + m(7);
+
+		// Top: [30-10, 31-11, 32-12, 33-13]
+
+		planes[3].n.x = m(12) - m(4);
+		planes[3].n.y = m(13) - m(5);
+		planes[3].n.z = m(14) - m(6);
+		planes[3].d = m(15) - m(7);
+
+		// Far: [30-20, 31-21, 32-22, 33-23]
+
+		planes[5].n.x = m(12) - m(8);
+		planes[5].n.y = m(13) - m(9);
+		planes[5].n.z = m(14) - m(10);
+		planes[5].d = m(15) - m(11);
+
+		// Near: [30+20, 31+21, 32+22, 33+23]
+
+		planes[4].n.x = m(12) + m(8);
+		planes[4].n.y = m(13) + m(9);
+		planes[4].n.z = m(14) + m(10);
+		planes[4].d = m(15) + m(11);
+
+
+			for (int i = 0; i < 6; ++i) {
+				double invl = Math.sqrt(planes[i].n.x * planes[i].n.x + planes[i].n.y * planes[i].n.y + planes[i].n.z
+						* planes[i].n.z);
+
+				planes[i].n.x *= invl;
+				planes[i].n.y *= invl;
+				planes[i].n.z *= invl;
+				planes[i].d *= invl;
+			}
+	}
+
+	@Override
+	public String toString() {
+		return "m[" + m(0) + "|" + m(1) + "|" + m(2) + "|" + m(3) + "|" + m(4) + "|" + m(5) + "|" + m(6) + "|" + m(7)
+				+ "|" + m(8) + "|" + m(9) + "|" + m(10) + "|" + m(11) + "|" + m(12) + "|" + m(13) + "|" + m(14) + "|"
+				+ m(15) + "]" + "Frustum2[" + planes[0] + ", " + planes[1] + ", " + planes[2] + ", " + planes[3] + ", "
+				+ planes[4] + ", " + planes[5] + "]";
+	}
+}