Merge pull request #1 from drskullster/master

Pen speed control

.gitignore

@@ -1,3 +1,5 @@
 bin
 tmp
 distribution
+*.iml
+.idea/

examples/speed/speed.pde

@@ -0,0 +1,32 @@
+import hpglgraphics.*;
+
+int lines = 30;
+
+void setup() {
+
+  size(1104, 772);
+
+  HPGLGraphics hpgl = (HPGLGraphics) createGraphics(width, height, HPGLGraphics.HPGL);
+
+  hpgl.setPaperSize("A4");
+  hpgl.setPath("output.hpgl");
+
+  background(255);
+  stroke(0);
+  fill(0);
+
+  beginRecord(hpgl);
+
+  // draw lines at incremental speed
+  for(int i = 0; i < lines; i++) {
+     hpgl.setSpeed(i);
+     int y = height / lines * (i + 1);
+     line(0, y, width, y); 
+  }
+
+  endRecord();
+
+}
+
+void draw() {
+}

resources/build.properties

@@ -132,12 +132,12 @@ source.repository=https://github.com/ciaron/HPGLGraphics.git
 # This is used to compare different versions of the same Library, and check if 
 # an update is available.
 
-library.version=4
+library.version=5
 
 
 # The version as the user will see it.
 
-library.prettyVersion=1.0.3
+library.prettyVersion=1.0.4
 
 
 # The min and max revision of Processing compatible with your Library.

resources/library.properties

@@ -41,11 +41,11 @@ paragraph = This library works in much the same way as PDF or DXF export - by wr
 # compare different versions of the same Library, and check if an update is 
 # available. You should think of it as a counter, counting the total number of 
 # releases you've had.
-version = 004
+version = 005
 
 # The version as the user will see it. If blank, the version attribute will be 
 # used here. This should be a single word, with no spaces.
-prettyVersion = 1.0.3  # This is treated as a String
+prettyVersion = 1.0.4  # This is treated as a String
 
 # The min and max revision of Processing compatible with your Library.
 # Note that these fields use the revision and not the version of Processing, 

src/hpglgraphics/HPGLGraphics.java

@@ -110,16 +110,34 @@ public void setPath(String path) {
 		    throw new RuntimeException("Something went wrong trying to create file "+this.path);
    	}
   }
-  
+
   /**
    * This method selects plotter pen via the HPGL 'SP' instruction.
    * Called from the Processing sketch.
-   * 
+   *
    * @example simple_demo
    * @param pen : integer number of pen to select (depends on plotter)
    */
   public void selectPen(int pen) {
-    writer.println("SP"+pen+";");    
+    if(writer != null) {
+      writer.println("SP"+pen+";");
+    } else {
+      System.out.println("selectPen() used outside of beginRecord() has no effect");
+    }
+  }
+
+  /**
+   * This method sets speed for pen moves when down via the HPGL 'VS' instruction.
+   *
+   * @example speed
+   * @param speed : integer number for speed from 0 to 127
+   */
+  public void setSpeed(int speed) {
+    if(writer != null) {
+      writer.println("VS"+speed+";");
+    } else {
+      System.out.println("setSpeed() used outside of beginRecord() has no effect");
+    }
   }
 
   public void beginDraw() {