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fixed a bug in AbstractHeightmap.flatten

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git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@7560 75d07b2b-3a1a-0410-a2c5-0572b91ccdca
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bre..ns 2011-06-08 22:55:24 +00:00
parent e9fb72dcf2
commit 9b614ee389
1 changed files with 31 additions and 0 deletions
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31
engine/src/terrain/com/jme3/terrain/heightmap/AbstractHeightMap.java
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@ -316,6 +316,29 @@ public abstract class AbstractHeightMap implements HeightMap {
}
}
/**
* Find the minimum and maximum height values.
* @return a float array with two value: min height, max height
*/
public float[] findMinMaxHeights() {
float[] minmax = new float[2];
float currentMin, currentMax;
currentMin = heightData[0];
currentMax = heightData[0];
for (int i = 0; i < heightData.length; i++) {
if (heightData[i] > currentMax) {
currentMax = heightData[i];
} else if (heightData[i] < currentMin) {
currentMin = heightData[i];
}
}
minmax[0] = currentMin;
minmax[1] = currentMax;
return minmax;
}
/**
* <code>erodeTerrain</code> is a convenience method that applies the FIR
* filter to a given height map. This simulates water errosion.
@ -378,7 +401,11 @@ public abstract class AbstractHeightMap implements HeightMap {
if (flattening <= 1) {
return;
}
float[] minmax = findMinMaxHeights();
normalizeTerrain(1f);
for (int x = 0; x < size; x++) {
for (int y = 0; y < size; y++) {
float flat = 1.0f;
@ -391,6 +418,10 @@ public abstract class AbstractHeightMap implements HeightMap {
heightData[x + y * size] = flat;
}
}
// re-normalize back to its oraginal height range
float height = minmax[1] - minmax[0];
normalizeTerrain(height);
}
/**