/*
- * 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;
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;
}
}
+
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) {
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;
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)