spline profile renderer for paper

splineProfileRenderer/sketch.properties

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+mode.id=processing.mode.java.JavaMode
+mode=Java

splineProfileRenderer/splineProfileRenderer.pde

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+import toxi.geom.*;
+import processing.svg.*;
+
+LineStrip2D strip;
+int diameterQuality = 10;
+
+void setup()
+{ 
+  size(1200, 1200, P3D);
+
+  float spiralThickness = 23.07f; // in mm
+  float spiralRadius = 14.172489f; // in mm
+  float adjust = 0.2219f;
+  float spikiness = 23.164747f;
+  float minThickness = 0.08916104f; // percentage, 0 - 1
+  float scaleFactor = 0.5*width/spikiness;
+
+  float y =  spikiness*scaleFactor;
+  float yBase = 1f*spikiness;
+
+  float x = spiralThickness*scaleFactor;
+  float xBase = 0; // minRMS*spiralThickness; // TODO: is this right??
+
+  makeProfile2(x, y);
+}
+
+
+
+void makeProfile1(float x, float y)
+{
+  Spline2D spline = new Spline2D();
+
+  // pointy on bottom
+  spline.add(0, 0);    
+  spline.add(x*0.66, y*0.4); //underhang
+  spline.add(x, y);
+  spline.add(x*0.3, y*0.66); // overhang
+  spline.add(0, 0); // close spline
+  strip = spline.toLineStrip2D(diameterQuality);
+}
+
+void makeProfile2(float x, float y)
+{
+  // pointy on top v2    
+  double inc = Math.PI/24d;
+  double maxAngle = Math.PI*2d;
+  double offset = Math.PI/2d;
+
+  strip = new LineStrip2D();
+
+  for (double angle=0; angle<maxAngle; angle+=inc)
+  {
+    double prog = Math.abs(angle/(maxAngle/2) - 1);
+    prog -= 1d;
+    prog = prog*prog; // smoothing
+    prog = prog*prog; //cubic?
+
+    double xx = (1d-prog)*x;
+
+    strip.add((float)(0.5d*xx*(Math.cos(angle+offset)+1d)), (float)(0.5d*xx*(Math.sin(angle+offset)+1d)));
+  }
+}
+
+
+void draw() 
+{
+  beginRecord(SVG, "spline.svg");
+  translate(3*width/4, 3*height/4);
+  rotate(PI);
+  int numVerts = strip.getVertices().size();
+
+  float diam = 10;
+
+  Vec2D pv = strip.get(0);
+
+  background(255);
+  ellipseMode(CENTER);
+  strokeWeight(2);
+
+  for (int i=1; i < numVerts; i++)
+  { 
+    float fade = i/float(numVerts);
+    fade = 1f-0.875*
+      fade*fade;
+
+    Vec2D cv = strip.get(i);
+
+    fill(10, 80, 10, fade*255);
+    stroke(10);
+
+    line(pv.x, pv.y, cv.x, cv.y);
+
+    noStroke();
+    ellipse(pv.x, pv.y, diam, diam);
+
+
+    pv = cv;
+  }
+  /* 
+   noFill();
+   strokeWeight(3);
+   stroke(0, 250, 250);
+   
+   for (Vec2D p : spline.getPointList())
+   {
+   text(""+p.x+","+p.y, p.x, p.y);
+   ellipse(p.x, p.y, diam*1.5, diam*1.5);
+   }
+   */
+  endRecord();   
+  noLoop();
+}