src/main/java/eu/svjatoslav/sixth/e3d/renderer/raster/shapes/composite/textcanvas/CanvasCharacter.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.raster.shapes.composite.textcanvas;
   6
   7 import eu.svjatoslav.sixth.e3d.geometry.Point2D;
   8 import eu.svjatoslav.sixth.e3d.geometry.Point3D;
   9 import eu.svjatoslav.sixth.e3d.gui.RenderingContext;
  10 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.AbstractCoordinateShape;
  11 import eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.solidpolygon.SolidPolygon;
  12
  13 import java.awt.*;
  14
  15 import static java.lang.String.valueOf;
  16
  17 /**
  18  * Represents a single character on the text canvas.
  19  */
  20 public class CanvasCharacter extends AbstractCoordinateShape {
  21
  22     private static final int MAX_FONT_SIZE = 500;
  23
  24     /**
  25      * Cached fonts.
  26      */
  27     private static final Font[] fonts = new Font[MAX_FONT_SIZE];
  28
  29     /**
  30      * The character to be rendered.
  31      */
  32     private char value;
  33
  34     private eu.svjatoslav.sixth.e3d.renderer.raster.Color foregroundColor;
  35
  36     private eu.svjatoslav.sixth.e3d.renderer.raster.Color backgroundColor;
  37
  38     public CanvasCharacter(final Point3D point, final char character,
  39                            final eu.svjatoslav.sixth.e3d.renderer.raster.Color foregroundColor,
  40                            final eu.svjatoslav.sixth.e3d.renderer.raster.Color backgroundColor) {
  41
  42         super(5);
  43         coordinates[0].coordinate = point;
  44
  45         value = character;
  46
  47         this.foregroundColor = foregroundColor;
  48
  49         this.backgroundColor = backgroundColor;
  50
  51         // set corner coordinates (for drawing background)
  52         {
  53             final double widthHalf = TextCanvas.FONT_CHAR_WIDTH / 2d;
  54             final double heightHalf = TextCanvas.FONT_CHAR_HEIGHT / 2d;
  55
  56             // upper left
  57             coordinates[1].coordinate = point.clone().translateX(-widthHalf)
  58                     .translateY(-heightHalf);
  59
  60             // upper right
  61             coordinates[2].coordinate = point.clone().translateX(widthHalf)
  62                     .translateY(-heightHalf);
  63
  64             // lower right
  65             coordinates[3].coordinate = point.clone().translateX(widthHalf)
  66                     .translateY(heightHalf);
  67
  68             // lower left
  69             coordinates[4].coordinate = point.clone().translateX(-widthHalf)
  70                     .translateY(heightHalf);
  71
  72         }
  73     }
  74
  75     /**
  76      * Returns a font of the specified size.
  77      * <p>
  78      *     If the font of the specified size is already cached, it will be
  79      *     returned. Otherwise, a new font will be created, cached and returned.
  80      *
  81      *
  82      * @param size the size of the font
  83      * @return the font
  84      */
  85     public static Font getFont(final int size) {
  86         if (fonts[size] != null)
  87             return fonts[size];
  88
  89         final Font font = new Font("Courier", Font.BOLD, size);
  90         fonts[size] = font;
  91         return font;
  92     }
  93
  94     /**
  95      * Returns color of the background.
  96      */
  97     public eu.svjatoslav.sixth.e3d.renderer.raster.Color getBackgroundColor() {
  98         return backgroundColor;
  99     }
 100
 101     /**
 102      * Sets color of the background.
 103      */
 104     public void setBackgroundColor(
 105             final eu.svjatoslav.sixth.e3d.renderer.raster.Color backgroundColor) {
 106         this.backgroundColor = backgroundColor;
 107     }
 108
 109     /**
 110      * Returns color of the foreground.
 111      * @return the color
 112      */
 113     public eu.svjatoslav.sixth.e3d.renderer.raster.Color getForegroundColor() {
 114         return foregroundColor;
 115     }
 116
 117     /**
 118      * Sets color of the foreground.
 119      * @param foregroundColor the color
 120      */
 121     public void setForegroundColor(
 122             final eu.svjatoslav.sixth.e3d.renderer.raster.Color foregroundColor) {
 123         this.foregroundColor = foregroundColor;
 124     }
 125
 126     @Override
 127     public void paint(final RenderingContext renderingContext) {
 128
 129         SolidPolygon.drawPolygon(renderingContext,
 130                 coordinates[1].onScreenCoordinate,
 131                 coordinates[2].onScreenCoordinate,
 132                 coordinates[3].onScreenCoordinate, mouseInteractionController,
 133                 backgroundColor);
 134
 135         SolidPolygon.drawPolygon(renderingContext,
 136                 coordinates[1].onScreenCoordinate,
 137                 coordinates[3].onScreenCoordinate,
 138                 coordinates[4].onScreenCoordinate, mouseInteractionController,
 139                 backgroundColor);
 140
 141         final int size = (int) ((renderingContext.width * 4.5) / onScreenZ);
 142
 143         // do not render too large characters
 144         if (size >= MAX_FONT_SIZE)
 145             return;
 146
 147         final Point2D onScreenLocation = coordinates[0].onScreenCoordinate;
 148
 149         // screen borders check
 150         if (onScreenLocation.x < 0)
 151             return;
 152         if (onScreenLocation.y < 0)
 153             return;
 154
 155         if (onScreenLocation.x > renderingContext.width)
 156             return;
 157         if (onScreenLocation.y > renderingContext.height)
 158             return;
 159
 160         renderingContext.graphics.setFont(getFont(size));
 161         renderingContext.graphics.setColor(foregroundColor.toAwtColor());
 162         renderingContext.graphics.drawString(
 163                 valueOf(value),
 164                 (int) onScreenLocation.x - (int) (size / 3.2),
 165                 (int) onScreenLocation.y + (int) (size / 2.5));
 166
 167     }
 168
 169     public void setValue(final char value) {
 170         this.value = value;
 171     }
 172
 173 }