src/main/java/eu/svjatoslav/sixth/e3d/renderer/octree/raytracer/Camera.java

   1 /*
   2  * Sixth 3D engine. Author: Svjatoslav Agejenko.
   3  * This project is released under Creative Commons Zero (CC0) license.
   4  */
   5 package eu.svjatoslav.sixth.e3d.renderer.octree.raytracer;
   6
   7 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
   8 import eu.svjatoslav.sixth.e3d.gui.Avatar;
   9 import eu.svjatoslav.sixth.e3d.math.Transform;
  10 import eu.svjatoslav.sixth.e3d.renderer.raster.Color;
  11 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.line.LineAppearance;
  12 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.TexturedRectangle;
  13 import eu.svjatoslav.sixth.e3d.renderer.raster.texture.Texture;
  14
  15 import javax.imageio.ImageIO;
  16 import java.awt.*;
  17 import java.awt.image.BufferedImage;
  18 import java.io.IOException;
  19 import java.net.URL;
  20
  21 /**
  22  * Camera that sees the raytraced scene.
  23  * It is represented on the scene as a textured rectangle.
  24  */
  25 public class Camera extends TexturedRectangle {
  26
  27     public static final int SIZE = 100;
  28     public static final int IMAGE_SIZE = 500;
  29     private final CameraView cameraView;
  30
  31     public Camera(final Avatar avatar, final double zoom) {
  32         super(new Transform(avatar.getLocation().clone()));
  33         cameraView = new CameraView(avatar, zoom);
  34
  35         computeCameraCoordinates(avatar);
  36
  37         addWaitNotification(getTexture());
  38     }
  39
  40     private void addWaitNotification(final Texture texture) {
  41         // add hourglass icon
  42         try {
  43             final BufferedImage sprite = getSprite("eu/svjatoslav/sixth/e3d/examples/hourglass.png");
  44             texture.graphics.drawImage(sprite, IMAGE_SIZE / 2,
  45                     (IMAGE_SIZE / 2) - 30, null);
  46         } catch (final Exception ignored) {
  47         }
  48
  49         // add "Please wait..." message
  50         texture.graphics.setColor(java.awt.Color.WHITE);
  51         texture.graphics.setFont(new Font("Monospaced", Font.PLAIN, 10));
  52         texture.graphics.drawString("Please wait...", (IMAGE_SIZE / 2) - 20,
  53                 (IMAGE_SIZE / 2) + 30);
  54     }
  55
  56     private void computeCameraCoordinates(final Avatar avatar) {
  57         initialize(SIZE, SIZE, IMAGE_SIZE, IMAGE_SIZE, 3);
  58
  59         Point3D cameraCenter = new Point3D();
  60
  61         topLeft.setValues(cameraCenter.x, cameraCenter.y, cameraCenter.z + SIZE);
  62         topRight.clone(topLeft);
  63         bottomLeft.clone(topLeft);
  64         bottomRight.clone(topLeft);
  65
  66         final float viewAngle = (float) .6;
  67
  68         topLeft.rotate(cameraCenter, -viewAngle, -viewAngle);
  69         topRight.rotate(cameraCenter, viewAngle, -viewAngle);
  70         bottomLeft.rotate(cameraCenter, -viewAngle, viewAngle);
  71         bottomRight.rotate(cameraCenter, viewAngle, viewAngle);
  72
  73         topLeft.rotate(cameraCenter, -avatar.getAngleXZ(), -avatar.getAngleYZ());
  74         topRight.rotate(cameraCenter, -avatar.getAngleXZ(), -avatar.getAngleYZ());
  75         bottomLeft.rotate(cameraCenter, -avatar.getAngleXZ(), -avatar.getAngleYZ());
  76         bottomRight.rotate(cameraCenter, -avatar.getAngleXZ(), -avatar.getAngleYZ());
  77
  78         final Color cameraColor = new Color(255, 255, 0, 255);
  79         final LineAppearance appearance = new LineAppearance(2, cameraColor);
  80
  81         addShape(appearance.getLine(topLeft, topRight));
  82         addShape(appearance.getLine(bottomLeft, bottomRight));
  83         addShape(appearance.getLine(topLeft, bottomLeft));
  84         addShape(appearance.getLine(topRight, bottomRight));
  85
  86     }
  87
  88     public CameraView getCameraView() {
  89         return cameraView;
  90     }
  91
  92     public BufferedImage getSprite(final String ref) throws IOException {
  93         final URL url = this.getClass().getClassLoader().getResource(ref);
  94         return ImageIO.read(url);
  95     }
  96
  97 }