Initial commit

Author: jansensan

.gitignore

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+### IGNORE FILES FROM GIT ###
+
+### MAC OSX FILES ###
+*._*
+*.DS_STORE
+
+### PROJECT-SPECIFIC FILES ###

readme.md

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+# Processing example — Mouse press on tile
+

src/mouse_press_on_tile/mouse_press_on_tile.pde

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+// variables
+int numRows = 10;
+int numColumns = 10;
+int tileSize;
+
+
+// processing setup
+void setup() {
+  // initial setup
+  background(0);  // set the background to black
+  size(400, 400); // set the dimension of the canvas
+
+  drawGrid();     // call the method once to draw the grid 
+}
+
+void draw() {
+  // nothing is needed here
+}
+
+
+// processing event handlers
+void mousePressed() {
+  // obtain the ratio of the mouse position versus the x and y axies 
+  // the float() method is called to cast (force)
+  // the integer variables into floating point numbers
+  // so that the division work
+  float ratioX = float(mouseX) / float(width);
+  float ratioY = float(mouseY) / float(height);
+  
+  // calculate the position of the tile to color
+  // by getting at which tile index the mouse is located
+  // and then multiply the index by the tile size
+  // to get the coordinates to draw a colored tiled 
+  int tileX = floor(ratioX * numColumns) * tileSize;
+  int tileY = floor(ratioY * numRows) * tileSize;
+  
+  // set random rgb values to the fill
+  fill(
+    floor(random(255)), // get random red
+    floor(random(255)), // get random green
+    floor(random(255))  // get random blue
+  );
+
+  // draw the rectangle
+  rect(
+    tileX, tileY,       // coordinates
+    tileSize, tileSize  // dimensions
+  );
+  
+  // release the fill, so next method calling fill
+  // is not stuck with last color set 
+  noFill();
+}
+
+
+// custom methods definitions
+void drawGrid() {
+  // get tile size
+  tileSize = width / numColumns;
+  
+  // init tile positions
+  int tileX = 0;
+  int tileY = 0;
+
+  // iterate through the columns
+  for (int i = 0; i < numColumns; i++) {
+    // draw each column 
+    for (int j = 0; j < numRows; j++) {
+      // calculate the position of the tile
+      tileX = i * tileSize;
+      tileY = j * tileSize;
+      // draw the tile
+      rect(tileX, tileY, tileSize, tileSize);
+    }
+  }
+}