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# ael11002 / geometric_separators

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Andrew Lawson authored and Andrew Lawson committed Dec 11, 2014
1 parent 6e0c0b2 commit 7a97642a5be22c3d54bd3826b24ba94948ccd828
Showing with 39 additions and 38 deletions.
1. +3 −1 README.md
2. +36 −37 geometric_separators.pde
 @@ -1,6 +1,8 @@ geometric_separators Geometric Separators ==================== ![alt tag](http://imgur.com/e5PkQ4a) Geometric separators project for CSE 4095 (Computational Geometry). About:
 @@ -57,6 +57,10 @@ void mousePressed() { // If mouse presses calculate button else if ((mouseX >= calc_x && mouseX <= (calc_x + calc_w)) && (mouseY >= calc_y && mouseY <= (calc_y + calc_h))) { if (rawInput.size() == 0) { System.out.println("You don't have any input points!"); return; } CenterAndSphere returnVals = getSeparator(rawInput); sphere = returnVals.sphere; centerPoint = returnVals.center; @@ -89,7 +93,6 @@ PVector inTetrahedron(ArrayList points) { PVector testPoint = pointsCopy.get(i); pointsCopy.remove(i); // Test if every determinant has the same sign System.out.println(pointsCopy.size()); RealMatrix d0Matrix = getDetMatrix(pointsCopy.get(0), pointsCopy.get(1), pointsCopy.get(2), pointsCopy.get(3)); RealMatrix d1Matrix = getDetMatrix(testPoint, pointsCopy.get(1), pointsCopy.get(2), pointsCopy.get(3)); RealMatrix d2Matrix = getDetMatrix(pointsCopy.get(0), testPoint, pointsCopy.get(2), pointsCopy.get(3)); @@ -228,7 +231,6 @@ boolean areSameSign(ArrayList detList) { negDet++; } } System.out.println("negDet" + Integer.toString(negDet)); if (negDet == 0 || negDet == detList.size()) { return true; } @@ -266,8 +268,14 @@ CenterAndSphere getSeparator(ArrayList input) { // Get radius for our separator float getRadius(PVector centerPoint, PVector unitVector) { System.out.println("Centerpoint"); System.out.println(centerPoint); System.out.println("Centerpoint2D"); PVector centerPoint2D = new PVector(centerPoint.x, centerPoint.y); System.out.println(centerPoint2D); System.out.println("Numerator."); float numerator = (float)Math.sqrt(Math.abs(centerPoint.z - Math.pow(centerPoint2D.mag(), 2))); System.out.println(numerator); return numerator / Math.abs(unitVector.z); } @@ -277,7 +285,7 @@ float[] getSphereAttr(PVector centerPoint, PVector unitVector, float radius) { centerPoint.sub(unitVector); sphereCenter = new PVector(centerPoint.x, centerPoint.y, centerPoint.z); sphereRadius = radius; float[] attributes = {centerPoint.x, centerPoint.y, radius, radius}; float[] attributes = {centerPoint.x, centerPoint.y, 2 * radius, 2 * radius}; return attributes; } @@ -308,42 +316,33 @@ ArrayList> samplePoints(ArrayList input) { // Approximate the centerpoint PVector approxCenterpoint(ArrayList input) { if (input.size() == 0) { System.out.println("You don't have any input points!"); return null; } else { while (input.size() > 1) { ArrayList> setList = samplePoints(input); ArrayList radonList = new ArrayList(); for (ArrayList list : setList) { System.out.println(list.size()); PVector radonPoint = getRadonPoint(list); radonList.add(radonPoint); } input = radonList; while (input.size() > 1) { ArrayList> setList = samplePoints(input); ArrayList radonList = new ArrayList(); for (ArrayList list : setList) { PVector radonPoint = getRadonPoint(list); radonList.add(radonPoint); } return input.get(0); input = radonList; } return input.get(0); } // Draw void draw() { background(255); // Draw separator sphere projected to 2D if (sphere != null) { strokeWeight(8); stroke(255); shape(sphere); } // Draw center point if (centerPoint != null) { stroke(255, 0, 0); strokeWeight(6); strokeWeight(8); point(centerPoint.x, centerPoint.y); stroke(0); System.out.println("x-coordinate: " + Float.toString(centerPoint.x)); System.out.println("y-coordinate: " + Float.toString(centerPoint.y)); } // Draw separator sphere projected to 2D if (sphere != null) { strokeWeight(6); ellipseMode(RADIUS); shape(sphere); } shape(reset); shape(calculate); @@ -356,21 +355,21 @@ void draw() { // Draw input for (PVector point : rawInput) { strokeWeight(8); stroke(0); if (sphereCenter != null) { stroke(0, 0, 255); point(sphereCenter.x, sphereCenter.y); stroke(0); if (point.x >= sphereCenter.x - sphereRadius && point.x <= sphereCenter.x + sphereRadius) { if (point.y >= sphereCenter.y - sphereRadius && point.y <= sphereCenter.y + sphereRadius) { stroke(0, 255, 0); } float dx = Math.abs(point.x - (sphereCenter.x + sphereRadius)); float dy = Math.abs(point.y - (sphereCenter.y + sphereRadius)); if (Math.pow(dx, 2) + Math.pow(dy, 2) <= Math.pow(sphereRadius, 2)) { stroke(0, 255, 0); point(point.x, point.y); } else { stroke(0); point(point.x, point.y); } point(point.x, point.y); } else { stroke(0); point(point.x, point.y); strokeWeight(2); } } }

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