X-Git-Url: http://www2.svjatoslav.eu/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Feu%2Fsvjatoslav%2Fsixth%2Fe3d%2Frenderer%2Fraster%2Fshapes%2Fbasic%2FGlowingPoint.java;h=6541aca55b1d8bfc4a6dd096096a6a311d4d5067;hb=a3ff3683bd0a025061667b26b6fcf56fe20f0afc;hp=a7b4784029ca75e48a343d3a5ba7b8eb5a9e0e88;hpb=316a696bf9db6e8eddf90ef3df5e1119481c0192;p=sixth-3d.git

diff --git a/src/main/java/eu/svjatoslav/sixth/e3d/renderer/raster/shapes/basic/GlowingPoint.java b/src/main/java/eu/svjatoslav/sixth/e3d/renderer/raster/shapes/basic/GlowingPoint.java
index a7b4784..6541aca 100644
--- a/src/main/java/eu/svjatoslav/sixth/e3d/renderer/raster/shapes/basic/GlowingPoint.java
+++ b/src/main/java/eu/svjatoslav/sixth/e3d/renderer/raster/shapes/basic/GlowingPoint.java
@@ -1,5 +1,5 @@
 /*
- * Sixth 3D engine. Author: Svjatoslav Agejenko. 
+ * Sixth 3D engine. Author: Svjatoslav Agejenko.
  * This project is released under Creative Commons Zero (CC0) license.
  */
 package eu.svjatoslav.sixth.e3d.renderer.raster.shapes.basic;
@@ -18,6 +18,10 @@ import static java.lang.Math.sqrt;
 public class GlowingPoint extends ForwardOrientedTexture {
 
     private static final int TEXTURE_RESOLUTION_PIXELS = 100;
+    /**
+     * A set of all existing glowing points.
+     * Used to reuse textures of glowing points of the same color.
+     */
     private static final Set<GlowingPoint> glowingPoints = Collections.newSetFromMap(new WeakHashMap<>());
     private final Color color;
 
@@ -31,10 +35,15 @@ public class GlowingPoint extends ForwardOrientedTexture {
         }
     }
 
+
     private static double computeScale(double pointSize) {
         return pointSize / ((double) (TEXTURE_RESOLUTION_PIXELS / 50f));
     }
 
+    /**
+     * Returns a texture for a glowing point of the given color.
+     * The texture is a circle with a gradient from transparent to the given color.
+     */
     private static Texture getTexture(final Color color) {
         // attempt to reuse texture from existing glowing point of the same color
         synchronized (glowingPoints) {
@@ -47,6 +56,10 @@ public class GlowingPoint extends ForwardOrientedTexture {
         return createTexture(color);
     }
 
+    /**
+     * Creates a texture for a glowing point of the given color.
+     * The texture is a circle with a gradient from transparent to the given color.
+     */
     private static Texture createTexture(final Color color) {
         final Texture texture = new Texture(TEXTURE_RESOLUTION_PIXELS, TEXTURE_RESOLUTION_PIXELS, 1);
         int halfResolution = TEXTURE_RESOLUTION_PIXELS / 2;
@@ -55,7 +68,7 @@ public class GlowingPoint extends ForwardOrientedTexture {
             for (int y = 0; y < TEXTURE_RESOLUTION_PIXELS; y++) {
                 int address = texture.primaryBitmap.getAddress(x, y);
 
-                final int distanceFromCenter = (int) sqrt(pow (halfResolution - x, 2) + pow (halfResolution - y, 2));
+                final int distanceFromCenter = (int) sqrt(pow(halfResolution - x, 2) + pow(halfResolution - y, 2));
 
                 int alpha = 255 - ((270 * distanceFromCenter) / halfResolution);
                 if (alpha < 0)