Author: davedes (posted 2013-01-17 18:48:24, viewed 223 times)
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| import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL10;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
public class Test implements ApplicationListener {
OrthographicCamera cam;
Texture tex;
TextureRegion rect;
SpriteBatch batch;
@Override
public void create() {
cam = new OrthographicCamera();
tex = new Texture("data/libgdx.png");
rect = new TextureRegion(tex, 16, 16, 1, 1);
batch = new SpriteBatch();
}
@Override
public void resize(int width, int height) {
cam.setToOrtho(false, width, height);
}
@Override
public void render() {
Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
batch.begin();
drawGradient(batch, rect, 25, 25, 50, 50, Color.RED, Color.CLEAR, true);
batch.end();
}
@Override
public void pause() {
}
@Override
public void resume() {
}
@Override
public void dispose() {
}
private static float[] verts = new float[20];
public static void drawGradient(SpriteBatch batch, TextureRegion tex, float x, float y,
float width, float height, Color a, Color b, boolean horiz) {
float ca = a.toFloatBits();
float cb = b.toFloatBits();
int idx = 0;
verts[idx++] = x;
verts[idx++] = y;
verts[idx++] = horiz ? ca : cb; verts[idx++] = tex.getU(); verts[idx++] = tex.getV2();
verts[idx++] = x;
verts[idx++] = y + height;
verts[idx++] = ca; verts[idx++] = tex.getU();
verts[idx++] = tex.getV();
verts[idx++] = x + width;
verts[idx++] = y + height;
verts[idx++] = horiz ? cb : ca; verts[idx++] = tex.getU2();
verts[idx++] = tex.getV();
verts[idx++] = x + width;
verts[idx++] = y;
verts[idx++] = cb; verts[idx++] = tex.getU2();
verts[idx++] = tex.getV2();
batch.draw(tex.getTexture(), verts, 0, verts.length);
}
} |
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