/**
* for IgnoCodeLib version 0.2.x and above
* January 29, 2012 3:54:19 PM CST
* Demonstrates calls for creating polygons. Shows how to drag a shape and snap it
* to a grid. Demonstrates calls to {@code }makeCurrentStateVisitor()} and {@code makeBoundsCalculationVisitor()}.
*/
import com.ignotus.aifile.*;
import com.ignotus.util.*;
import java.util.*;
import java.io.PrintWriter;
/** irregular polygon list */
public ArrayList irregulars;
/** regular polygon list */
public ArrayList regulars;
/** grid points list */
public ArrayList grid;
/** random number utility */
public RandUtil rando;
/** how many grid steps horizontally */
int hzSteps = 8;
/** how many grid steps vertically */
int vtSteps;
/** size of a step in pixels */
float step;
/** background fill color */
int bgFillColor = Palette.composeColor(127);
/** shape that is selected for dragging */
BezShape selectedShape;
/** true if we should snap dragged shapes to the grid */
boolean snapToGrid = false;
/** the document for saving shapes */
public DocumentComponent document;
/** layer for shapes */
LayerComponent shapeLayer;
/** layer for grid */
LayerComponent gridLayer;
/** group for regular polygons */
GroupComponent regularGroup;
/** group for irregular */
GroupComponent irregularGroup;
/** group for grid points (circles) */
GroupComponent gridGroup;
/** bounding box for irregular shapes */
BezRectangle box;
public void setup() {
size(800, 600);
smooth();
// calculate grid steps
step = width/hzSteps;
vtSteps = (int) Math.floor(height/step);
// initialize arrays of BezShapes
irregulars = new ArrayList();
regulars = new ArrayList();
grid = new ArrayList();
// create a random number generator
rando = new RandUtil();
// create polygons and put them into arrays
createPolys();
createRegularPolys();
// create the vidible grid
createGrid();
// create the document and build its layers
createDocument();
printHelp();
}
void printHelp() {
// message to the user
println("\nType 's' to save");
println("Press and drag with the mouse to move a polygon");
println("Hold down shift key to snap polygon to grid");
println("Type 'x' or 'z' to change appearance of grid");
println("Type 'v' or 'V' to show/hide grid");
println("Type 'b' to show bounds of irregular polygons.");
println("Type 'h' to print this help message.");
}
public void draw() {
background(bgFillColor);
// this is one way to draw:
// step through lists and tell each shape to draw itself
/*
for (BezShape sh : regulars) {
sh.draw();
}
for (BezShape sh : irregulars) {
sh.draw();
}
for (BezShape sh : grid) {
sh.draw();
}
*/
// but since we have put all the geometry into the document,
// we can draw it with one simple call
document.draw();
// if there is a shape selected, move the it the distance between the
// current mouse position and the previous mouse position
if (mousePressed) {
if (null != selectedShape) {
float tx = mouseX - pmouseX;
float ty = mouseY - pmouseY;
selectedShape.translateShape(tx, ty);
}
}
}
/* We use this overridden method to check if the mouse is pressed inside a shape.
* We do this by stepping through the lists to see if the mouse point is inside one of them.
* It's a brute force approach, but with so few shapes it will work quickly enough.
*/
public void mousePressed() {
float x = mouseX;
float y = mouseY;
for (BezShape sh : regulars) {
if (sh.containsPoint(x, y)) {
selectedShape = sh;
return;
}
}
for (BezShape sh : irregulars) {
if (sh.containsPoint(x, y)) {
selectedShape = sh;
return;
}
}
selectedShape = null;
}
/* We use this overridden method to decide if we should relocate a shape
* and if it should snap to the grid or not.
*/
public void mouseReleased() {
snapToGrid = false;
// check if the shift key is down
if (keyPressed && key == CODED) {
if (keyCode == SHIFT) {
snapToGrid = true;
}
}
// if a shape was selected and snapToGrid is true, snap it to grid
if (null != selectedShape) {
if (snapToGrid) {
if (selectedShape.bezType() == BezShape.BezType.BEZ_REGULAR_POLY) {
// snap center to grid
LineVertex pt = selectedShape.centerVertex();
LineVertex snap = closestGridPoint(pt);
selectedShape.translateShape(snap.x() - pt.x(), snap.y() - pt.y());
}
else if (selectedShape.bezType() == BezShape.BezType.BEZ_POLY) {
// snap start point to grid
LineVertex pt = selectedShape.startVertex();
LineVertex snap = closestGridPoint(pt);
selectedShape.translateShape(snap.x() - pt.x(), snap.y() - pt.y());
}
}
}
snapToGrid = false;
}
/* We use this overridden method to catch key presses used as commands.
*/
public void keyReleased() {
if (key == 's' || key == 'S') {
// save file, put shapes in two layers
String filename = "Polygons.ai";
saveAI(filename, document);
println("saved" + "");
}
else if (key == 'x' || key == 'X') {
// use a visitor change the grid group's attributes to a random fill color and a white stroke
fill(Palette.randColor());
stroke(255);
strokeWeight(0.5f);
ShapeAttributeVisitor visitor = ShapeAttributeVisitor.makeCurrentStateVisitor(this);
gridGroup.accept(visitor);
}
else if (key == 'z' || key == 'Z') {
// use a visitor to change the grid group's attributes to no stroke and fill of 240
noStroke();
fill(240);
ShapeAttributeVisitor visitor = ShapeAttributeVisitor.makeCurrentStateVisitor(this);
gridGroup.accept(visitor);
}
else if (key == 'v' || key == 'V') {
gridGroup.setVisible(!gridGroup.isVisible());
}
else if (key == 'b' || key == 'B') {
// calculate irregular polygons bounding box with a visitor and show it
BoundsCalculationVisitor visitor = BoundsCalculationVisitor.makeBoundsCalculationVisitor();
irregularGroup.accept(visitor);
if (null != box) {
boolean gone = document.getDefaultLayer().remove(box);
println("removed box = "+ gone);
}
box = visitor.bounds();
box.setNoFill();
box.setWeight(1.5f);
box.setStrokeColor(Palette.composeColor(255));
box.setStrokeOpacity(127);
document.add(box);
}
else if (key == 'h' || key == 'H') {
printHelp();
}
}
/**
* create some regular polygons
*/
private void createRegularPolys() {
int totalPolys = hzSteps;
int[] sidesValues = new int[totalPolys];
for (int i = 0; i < totalPolys; i++) {
sidesValues[i] = 3 + i;
}
rando.shuffle(sidesValues);
float halfstep = 0.5f * step;
float radius = step * 0.4f;
float xctr;
float yctr = step + halfstep;
for (int i = 0; i < totalPolys; i++) {
xctr = halfstep + i * step;
stroke(Palette.randColor());
fill(Palette.randColor());
strokeWeight(rando.randomInRange(1, 5));
BezRegularPoly regPoly = BezRegularPoly.makeCenterRadiusSides(this, xctr, yctr, radius, sidesValues[i]);
regulars.add(regPoly);
}
}
/**
* create some irregular polygons that use grid points
* we do this by first creating a list of grid points and then
* copying points from it to the polygons.
*/
private void createPolys() {
// our grid is shifted a half step over and down
float halfstep = 0.5f * step;
float xctr;
float yctr;
ArrayList points = new ArrayList();
// just list grid points below the row of regualr polygons
for (int column = 2; column < vtSteps; column++) {
yctr = halfstep + column * step;
for (int row = 0; row < hzSteps; row++) {
xctr = halfstep + row * step;
points.add(new LineVertex(xctr, yctr));
}
}
fill(32, 0, 216);
strokeWeight(2);
stroke(Palette.randColor());
// a list to store our polygon points in
ArrayList poly = new ArrayList();
// put some points into the list
// avoid trouble: clone the points, do not pass references to them
// note that first and last points must be the same
poly.add(points.get(0).clone());
poly.add(points.get(1).clone());
poly.add(points.get(hzSteps).clone());
poly.add(points.get(0).clone());
irregulars.add(BezPoly.makePolyLineVertex(this, poly));
// clear the list and add some new points to it
poly.clear();
fill(216, 80, 32);
stroke(Palette.randColor());
poly.add(points.get(hzSteps + 2).clone());
poly.add(points.get(hzSteps + hzSteps + 3).clone());
poly.add(points.get(hzSteps + 4).clone());
poly.add(points.get(hzSteps + 3).clone());
poly.add(points.get(3).clone());
poly.add(points.get(2).clone());
poly.add(points.get(hzSteps + 2).clone());
irregulars.add(BezPoly.makePolyLineVertex(this, poly));
// clear the list and add some new points to it
poly.clear();
fill(216, 199, 55);
stroke(Palette.randColor());
poly.add(points.get(2 * hzSteps).clone());
poly.add(points.get(hzSteps + 1).clone());
poly.add(points.get(2 * hzSteps + 2).clone());
poly.add(points.get(2 * hzSteps + 1).clone());
poly.add(points.get(3 * hzSteps + 2).clone());
poly.add(points.get(3 * hzSteps + 1).clone());
poly.add(points.get(2 * hzSteps).clone());
irregulars.add(BezPoly.makePolyLineVertex(this, poly));
poly.clear();
// get a deep copy of the last polygon we added
BezShape sh = irregulars.get(irregulars.size() - 1).clone();
// call calculateCenter to make all transforms operate on the center of the shape
sh.calculateCenter();
sh.rotateShape(PApplet.PI);
sh.translateShape(4 * step, 0);
irregulars.add(sh);
}
/**
* Creates a regular grid.
*/
private void createGrid() {
// create a regular grid
float halfstep = 0.5f * step;
float xctr;
float yctr;
noStroke();
fill(240);
for (int i = 0; i < vtSteps; i++) {
yctr = halfstep + i * step;
for (int j = 0; j < hzSteps; j++) {
xctr = halfstep + j * step;
BezCircle circ = BezCircle.makeCenterRadius(this, xctr, yctr, 2);
grid.add(circ);
}
}
}
/**
* Returns the closest grid point to a supplied LineVertex (i.e., a point)
* @param vtx a point stored as a LineVertex
* @return closet grid point as a LineVertex
*/
public LineVertex closestGridPoint(LineVertex vtx) {
double halfstep = step/2.0;
// get nearest x in a halfstep grid to the left
double x = Math.floor(vtx.x() / halfstep) * halfstep;
// get nearest y in a halfstep grid to the top
double y = Math.floor(vtx.y() / halfstep) * halfstep;
int mx = (int) (x / halfstep) % 2;
int my = (int) (y / halfstep) % 2;
// if mx or my is even, that indicates that x or y is not on the grid
// but at a position half a step away from the grid
if (0 == mx) {
x += halfstep;
}
if (0 == my) {
y += halfstep;
}
return new LineVertex((float) x, (float) y);
}
/**
* Builds a document hierarchy with layers and groups for the lists of shapes we created.
* The document will act as a display list. We just have to call its draw() or write()
* methods to draw it to the screen or write it to a file.
*/
public void createDocument() {
document = new DocumentComponent(this, "Regular and Irregular Polygons");
// get lots of feedback as we save
document.setVerbose(true);
document.setCreator("Ignotus");
document.setOrg("IgnoStudio");
document.setWidth(width);
document.setHeight(height);
Palette pal = document.getPalette();
pal.addBlackWhiteGray();
shapeLayer = new LayerComponent(this, "Shapes");
BezRectangle rect = BezRectangle.makeLeftTopWidthHeight(this, 0, 0, width, height);
rect.setFillColor(bgFillColor);
shapeLayer.add(rect);
regularGroup = new GroupComponent(this);
regularGroup.add(regulars);
shapeLayer.add(regularGroup);
irregularGroup = new GroupComponent(this);
irregularGroup.add(irregulars);
shapeLayer.add(irregularGroup);
document.add(shapeLayer);
gridLayer = new LayerComponent(this, "Grid");
gridGroup = new GroupComponent(this);
gridGroup.add(grid);
gridLayer.add(gridGroup);
// lock the gridLayer
gridLayer.setLocked(true);
document.add(gridLayer);
}
/**
* Saves a document in Adobe Illustrator 7.0 format, transforming it into AI coordinate system.
* @param aiFilename name of the file
* @param doc a DocumentComponent to save
*/
private void saveAI(String aiFilename, DocumentComponent doc) {
PrintWriter output = createWriter(aiFilename);
// write the file to Illustrator, transfroming it into the AI coordinate system
document.writeWithAITransform(output);
}
com.ignotus.aifile.DisplayComponent