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 eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic.solidpolygon.SolidPolygon.drawPolygon;
  16 import static eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.textcanvas.TextCanvas.FONT_CHAR_HEIGHT;
  17 import static eu.svjatoslav.sixth.e3d.renderer.raster.shapes.composite.textcanvas.TextCanvas.FONT_CHAR_WIDTH;
  18 import static java.lang.String.valueOf;
  19
  20 /**
  21  * Represents a single character on the text canvas.
  22  */
  23 public class CanvasCharacter extends AbstractCoordinateShape {
  24
  25     private static final int MAX_FONT_SIZE = 500;
  26
  27     /**
  28      * Cached fonts.
  29      */
  30     private static final Font[] fonts = new Font[MAX_FONT_SIZE];
  31
  32     /**
  33      * The character to be rendered.
  34      */
  35     private char value;
  36
  37     /**
  38      * The foreground color of the character.
  39      */
  40     private eu.svjatoslav.sixth.e3d.renderer.raster.Color foregroundColor;
  41
  42     /**
  43      * The background color of the character.
  44      */
  45     private eu.svjatoslav.sixth.e3d.renderer.raster.Color backgroundColor;
  46
  47     public CanvasCharacter(final Point3D centerLocation, final char character,
  48                            final eu.svjatoslav.sixth.e3d.renderer.raster.Color foregroundColor,
  49                            final eu.svjatoslav.sixth.e3d.renderer.raster.Color backgroundColor) {
  50
  51         // There are 5 coordinates: center, upper left, upper right, lower right, lower left
  52         super(5);
  53
  54         value = character;
  55         this.foregroundColor = foregroundColor;
  56         this.backgroundColor = backgroundColor;
  57
  58
  59         coordinates[0].coordinate = centerLocation;
  60
  61         final double halfWidth = FONT_CHAR_WIDTH / 2d;
  62         final double halfHeight = FONT_CHAR_HEIGHT / 2d;
  63
  64         // upper left
  65         coordinates[1].coordinate = centerLocation.clone().translateX(-halfWidth)
  66                 .translateY(-halfHeight);
  67
  68         // upper right
  69         coordinates[2].coordinate = centerLocation.clone().translateX(halfWidth)
  70                 .translateY(-halfHeight);
  71
  72         // lower right
  73         coordinates[3].coordinate = centerLocation.clone().translateX(halfWidth)
  74                 .translateY(halfHeight);
  75
  76         // lower left
  77         coordinates[4].coordinate = centerLocation.clone().translateX(-halfWidth)
  78                 .translateY(halfHeight);
  79     }
  80
  81     /**
  82      * Returns a font of the specified size.
  83      * <p>
  84      * If the font of the specified size is already cached, it will be
  85      * returned. Otherwise, a new font will be created, cached and returned.
  86      *
  87      * @param size the size of the font
  88      * @return the font
  89      */
  90     public static Font getFont(final int size) {
  91         if (fonts[size] != null)
  92             return fonts[size];
  93
  94         final Font font = new Font("Courier", Font.BOLD, size);
  95         fonts[size] = font;
  96         return font;
  97     }
  98
  99     /**
 100      * Returns color of the background.
 101      */
 102     public eu.svjatoslav.sixth.e3d.renderer.raster.Color getBackgroundColor() {
 103         return backgroundColor;
 104     }
 105
 106     /**
 107      * Sets color of the background.
 108      */
 109     public void setBackgroundColor(
 110             final eu.svjatoslav.sixth.e3d.renderer.raster.Color backgroundColor) {
 111         this.backgroundColor = backgroundColor;
 112     }
 113
 114     /**
 115      * Returns color of the foreground.
 116      *
 117      * @return the color
 118      */
 119     public eu.svjatoslav.sixth.e3d.renderer.raster.Color getForegroundColor() {
 120         return foregroundColor;
 121     }
 122
 123     /**
 124      * Sets color of the foreground.
 125      *
 126      * @param foregroundColor the color
 127      */
 128     public void setForegroundColor(
 129             final eu.svjatoslav.sixth.e3d.renderer.raster.Color foregroundColor) {
 130         this.foregroundColor = foregroundColor;
 131     }
 132
 133     /**
 134      * Paints the character on the screen.
 135      * @param renderingContext the rendering context
 136      */
 137     @Override
 138     public void paint(final RenderingContext renderingContext) {
 139
 140         // Draw background rectangle first. It is composed of two triangles.
 141         drawPolygon(renderingContext,
 142                 coordinates[1].onScreenCoordinate,
 143                 coordinates[2].onScreenCoordinate,
 144                 coordinates[3].onScreenCoordinate,
 145                 mouseInteractionController,
 146                 backgroundColor);
 147
 148         drawPolygon(renderingContext,
 149                 coordinates[1].onScreenCoordinate,
 150                 coordinates[3].onScreenCoordinate,
 151                 coordinates[4].onScreenCoordinate,
 152                 mouseInteractionController,
 153                 backgroundColor);
 154
 155         final int desiredFontSize = (int) ((renderingContext.width * 4.5) / onScreenZ);
 156
 157         // do not render too large characters
 158         if (desiredFontSize >= MAX_FONT_SIZE)
 159             return;
 160
 161         final Point2D onScreenLocation = coordinates[0].onScreenCoordinate;
 162
 163         // screen borders check
 164         if (onScreenLocation.x < 0)
 165             return;
 166         if (onScreenLocation.y < 0)
 167             return;
 168
 169         if (onScreenLocation.x > renderingContext.width)
 170             return;
 171         if (onScreenLocation.y > renderingContext.height)
 172             return;
 173
 174         // draw the character
 175         renderingContext.graphics.setFont(getFont(desiredFontSize));
 176         renderingContext.graphics.setColor(foregroundColor.toAwtColor());
 177         renderingContext.graphics.drawString(
 178                 valueOf(value),
 179                 (int) onScreenLocation.x - (int) (desiredFontSize / 3.2),
 180                 (int) onScreenLocation.y + (int) (desiredFontSize / 2.5));
 181
 182     }
 183
 184     public void setValue(final char value) {
 185         this.value = value;
 186     }
 187
 188 }