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add texture coordinate scaling helper methods

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Gered 2013-07-15 19:09:25 -04:00
parent 8de3d0fba3
commit 0dacf1eea1
1 changed files with 16 additions and 0 deletions
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16
src/com/blarg/gdx/graphics/TextureAtlas.java
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@ -2,7 +2,10 @@ package com.blarg.gdx.graphics;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.utils.Array;
import com.blarg.gdx.math.MathHelpers;
public abstract class TextureAtlas {
public static final float TEXCOORD_EDGE_BLEED_OFFSET = 0.02f;
@ -24,4 +27,17 @@ public abstract class TextureAtlas {
public int count() {
return tiles.size;
}
public static void scaleTexCoord(Vector2 texCoord, TextureRegion tile, Vector2 out) {
out.x = scaleTexCoordU(texCoord.x, tile);
out.y = scaleTexCoordV(texCoord.y, tile);
}
public static float scaleTexCoordU(float u, TextureRegion tile) {
return MathHelpers.scaleRange(u, 0.0f, 1.0f, tile.getU(), tile.getU2());
}
public static float scaleTexCoordV(float v, TextureRegion tile) {
return MathHelpers.scaleRange(v, 0.0f, 1.0f, tile.getV(), tile.getV2());
}
}