KnotRenderer.java

package com.knotrenderer.view;

import java.sql.Date;
import java.text.SimpleDateFormat;

import com.knotrenderer.model.Curve;
import com.knotrenderer.util.CurveLoader;

import processing.core.PApplet;
import processing.event.KeyEvent;
import processing.event.MouseEvent;

public class KnotRenderer extends PApplet
{
//	private static final float CAMERA_START_Z = 40f;
//	private static final float ZOOM_MULTIPLIER = 20.f;
	private static final float CAMERA_START_Z = 40f;
	private static final float ZOOM_MULTIPLIER = 5.f;

	private static int WIDTH = 640;
	private static int HEIGHT = 480;
	
	private RenderCurve renderCurve;
	private float cameraX = WIDTH / 2;
	private float cameraY = HEIGHT / 2;
	private float cameraZ = CAMERA_START_Z;

	private float startMouseX;
	private float startMouseY;
	private float rotationX = 0;
	private float rotationY = 0;

	public static void main(String[] args)
	{
		PApplet.main(new String[] {KnotRenderer.class.getName()});
	}

	public void test()
	{
//		getSurface().get
	}
	@Override
	public void settings()
	{
		size(WIDTH, HEIGHT, "processing.opengl.PGraphics3D");
	}

	@Override
	public void setup()
	{
		new ControlP5Controller(this);

		surface.setResizable(true);


//		Curve curve = CurveLoader.loadCurveFromFile("D:/Peter/College_Grad_School/Independent_Study_Spring_2016_Cont/Knot-Renderer-Processing/Testing_Files/TJP-4th-C1-high-precision.curve");
//		Curve curve = CurveLoader.loadCurveFromFile("D:/Peter/College_Grad_School/Independent_Study_Spring_2016_Cont/Knot-Renderer-Processing/Testing_Files/TJP-4_1_stick-unknot-halved-3.curve");
		Curve curve = CurveLoader.loadCurveFromFile("D:/Peter/College_Grad_School/Independent_Study_Spring_2016_Cont/Knot-Renderer-Processing/Testing_Files/TJP-4_1_stick-unknot.curve");
//		Curve curve = CurveLoader.loadCurveFromFile("D:/Peter/College_Grad_School/Independent_Study_Spring_2016_Cont/Knot-Renderer-Processing/Testing_Files/TJP-4_1_stick-unknot-halved-2.curve");

		
//		Curve curve = CurveLoader.loadCurveFromFile("/Users/peterzaffetti/UC/Knot-Renderer-Processing/Testing_Files/TJP-4_1_stick-unknot.curve");
//		Curve curve = CurveLoader.loadCurveFromFile("/Users/peterzaffetti/UC/Knot-Renderer-Processing/Testing_Files/test.curve");
//		Curve curve = CurveLoader.loadCurveFromFile("/Users/peterzaffetti/UC/Knot-Renderer-Processing/Testing_Files/TJP-4_1_stick-unknot-halved-3.curve");
		Date date = new Date(System.currentTimeMillis());
		SimpleDateFormat formatter = new SimpleDateFormat("EEE, d MMM yyyy HH:mm:ss Z");
		System.out.println("Program Started at " + formatter.format(date));
		renderCurve = new RenderCurve(this, curve);
	}

	@Override
	public void mouseWheel(MouseEvent event)
	{
		cameraZ -= ZOOM_MULTIPLIER * event.getCount();
	}

	@Override
	public void frameResized(int w, int h) {
		super.frameResized(w, h);
		WIDTH = w;
		System.out.println(WIDTH);
		HEIGHT = h;
	}

	@Override
	public void keyPressed(KeyEvent event) {
		super.keyPressed(event);
		if(event.getKey() == CODED)
		{
			int keyCode = event.getKeyCode();
			switch (keyCode) 
			{
			case UP:
				rotationX += Math.PI / 6;
				break;
			case DOWN:
				rotationX -= Math.PI / 6;
				break;
			case LEFT:
				rotationY -= Math.PI / 6;
				break;
			case RIGHT:
				rotationY += Math.PI / 6;
				break;
			}
		}
		else
		{
			switch(event.getKey())
			{
			case ' ':
				//PDZ- when the user presses space make sure that the WIDTH and HEIGHT are updated to the latest
				WIDTH = width;
				HEIGHT = height;
				
				//TODO: PDZ- Doing it this way will apply the same transformation to every curve. Might want to make it so that you 
				//can control/rotate/translate each curve individually **SEE BELOW**
				cameraX = WIDTH/2;
				cameraY = HEIGHT/2;
				
				//PDZ- Uncomment these if you want the space bar to also undo any rotations and scaling of the knot/curve
//				cameraZ = CAMERA_START_Z;
//				rotationX = 0;
//				rotationY = 0;
				break;
			case 'w':
				cameraY -= 20;
				break;
			case 's':
				cameraY += 20;
				break;
			case 'a':
				cameraX -=20;
				break;
			case 'd':
				cameraX +=20;
				break;
			}

		}
	}

	@Override
	public void mouseDragged(MouseEvent event) 
	{
		//TODO: PDZ- Fix the issue where panning will slightly rotate the object (might be an issue with the camera)
		if(mousePressed && (mouseButton == LEFT))
		{
			if(startMouseX < 1)
			{
				startMouseX = mouseX;
			}
			float deltaX = mouseX - startMouseX;
			cameraX += deltaX;
			startMouseX = mouseX;
			
			if(startMouseY < 1)
			{
				startMouseY = mouseY;
			}
			float deltaY = mouseY - startMouseY;
			cameraY += deltaY;
			startMouseY = mouseY;
		}
		else if(mousePressed && (mouseButton == RIGHT))
		{

		}
	}

	@Override
	public void mouseClicked(MouseEvent event)
	{
		startMouseX = mouseX;
		startMouseY = mouseY;
	}

	@Override
	public void draw()
	{
		background(0);

		//PDZ- camera needs to be first since the translation messes up the coordinate
		pushMatrix();
		camera(WIDTH / 2, HEIGHT / 2, 40f, WIDTH/2.0f, HEIGHT/2.0f, 0f, 0f, 1f, 0f);
		popMatrix();

		pushMatrix();
		//TODO: PDZ- see comment above about separating the camera from the curves **SEE ABOVE** 
		// You would just need to apply the translation/rotation in the curve draw methods 
		translate(cameraX, cameraY, cameraZ); 
		stroke(255);
		strokeWeight(0.2f);
		rotateX(rotationX);
		rotateY(rotationY);
		scale(20); //PDZ- this needs to come after the translation
		noFill();

		renderCurve.drawBezierCurve();
		renderCurve.drawStickKnot();
		popMatrix();
	}

}