Android Open Source - android-plotter Base Surface

From Project

License

The source code is released under:

Apache License

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Java Source Code

package org.solovyev.android.plotter.meshes;
// ww w.  java2  s .  c o  m
import org.solovyev.android.plotter.Dimensions;
import org.solovyev.android.plotter.MeshConfig;

import javax.annotation.Nonnull;
import javax.microedition.khronos.opengles.GL10;
import javax.microedition.khronos.opengles.GL11;

/*
 0     1     2     3     4     5
  +----->---->v----->---->v-----+
  |?????^?????|?????^?????|?????^
  |?????|?????|?????|?????|?????|
11v???10|??? 9v??? 8|??? 7v??? 6|
  +------------------------------
  |?????^?????|?????^?????|?????^
  |?????|?????|?????|?????|?????|
12v???13|???14v?? 15|???16v???17|
  +------------------------------
  |?????^?????|?????^?????|?????^
  |?????|?????|?????|?????|?????|
23v???22|???21v???20|???19v???18|
  +------------------------------
  |?????^?????|?????^?????|?????^
  |?????|?????|?????|?????|?????|
24v???25|???26v???27|???28v???29|
  +---->^----->---->^----->---->^
 */
public abstract class BaseSurface extends BaseMesh implements DimensionsAware {

  @Nonnull
  protected volatile Dimensions dimensions;

  @Nonnull
  private final Arrays arrays = new Arrays();

  @Nonnull
  public Dimensions getDimensions() {
    return dimensions;
  }

  protected BaseSurface(@Nonnull Dimensions dimensions) {
    this.dimensions = dimensions;
  }

  public void setDimensions(@Nonnull Dimensions dimensions) {
    // todo serso: might be called on GL thread, requires synchronization
    if (!this.dimensions.equals(dimensions)) {
      this.dimensions = dimensions;
      setDirty();
    }
  }

  @Override
  public void onInit() {
    super.onInit();

    if (!dimensions.isEmpty()) {
      createInitializer().init(arrays);
      arrays.createBuffers();
    } else {
      setDirty();
    }
  }

  @Nonnull
  protected abstract SurfaceInitializer createInitializer();

  @Override
  public void onInitGl(@Nonnull GL11 gl, @Nonnull MeshConfig config) {
    super.onInitGl(gl, config);

    setVertices(arrays.getVerticesBuffer());
    setIndices(arrays.getIndicesBuffer(), IndicesOrder.LINE_STRIP);
  }

  @Override
  protected void onPostDraw(@Nonnull GL11 gl) {
    super.onPostDraw(gl);
    gl.glDrawArrays(GL10.GL_LINE_STRIP, 0, arrays.vertices.length / 3);
  }

  protected abstract float z(float x, float y, int xi, int yi);
}

Java Source Code List