Remove AWT dependencies from jme3-terrain ShaderUtils

- Remove mix(java.awt.Color, java.awt.Color, float) method (unused, AWT-dependent)
- Remove getImageDataFromImage(BufferedImage) method (unused, AWT-dependent)
- Remove all java.awt.* and related java.nio imports that were only used by those methods

Agent-Logs-Url: https://github.com/jMonkeyEngine/jmonkeyengine/sessions/8296ad20-a298-49e4-aeb5-aae4f42c13fb

Co-authored-by: riccardobl <4943530+riccardobl@users.noreply.github.com>

Author: Copilot

jme3-terrain/src/main/java/com/jme3/terrain/noise/ShaderUtils.java

@@ -29,15 +29,6 @@
  */
 package com.jme3.terrain.noise;
 
-import java.awt.Color;
-import java.awt.Graphics2D;
-import java.awt.image.BufferedImage;
-import java.awt.image.DataBuffer;
-import java.awt.image.DataBufferInt;
-import java.awt.image.WritableRaster;
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-
 /**
  * Helper class containing useful functions explained in the book:
  * Texturing & Modeling - A Procedural Approach
@@ -66,12 +57,6 @@ public static final float mix(final float a, final float b, final float f) {
         return (1 - f) * a + f * b;
     }
 
-    public static final Color mix(final Color a, final Color b, final float f) {
-        return new Color((int) ShaderUtils.clamp(ShaderUtils.mix(a.getRed(), b.getRed(), f), 0, 255), (int) ShaderUtils.clamp(
-                ShaderUtils.mix(a.getGreen(), b.getGreen(), f), 0, 255), (int) ShaderUtils.clamp(
-                ShaderUtils.mix(a.getBlue(), b.getBlue(), f), 0, 255));
-    }
-
     public static final int mix(final int a, final int b, final float f) {
         return (int) ((1 - f) * a + f * b);
     }
@@ -257,28 +242,6 @@ public static final float length(final float[] v) {
         return (float) Math.sqrt(s);
     }
 
-    public static final ByteBuffer getImageDataFromImage(BufferedImage bufferedImage) {
-        WritableRaster wr;
-        DataBuffer db;
-
-        BufferedImage bi = new BufferedImage(128, 64, BufferedImage.TYPE_INT_ARGB);
-        Graphics2D g = bi.createGraphics();
-        g.drawImage(bufferedImage, null, null);
-        bufferedImage = bi;
-        wr = bi.getRaster();
-        db = wr.getDataBuffer();
-
-        DataBufferInt dbi = (DataBufferInt) db;
-        int[] data = dbi.getData();
-
-        ByteBuffer byteBuffer = ByteBuffer.allocateDirect(data.length * 4);
-        byteBuffer.order(ByteOrder.LITTLE_ENDIAN);
-        byteBuffer.asIntBuffer().put(data);
-        byteBuffer.flip();
-
-        return byteBuffer;
-    }
-
     public static float frac(float f) {
         return f - ShaderUtils.floor(f);
     }