Android Open Source - DivisionByZero Tower Manager

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Back to project page DivisionByZero.

License

The source code is released under:

Apache License

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Java Source Code

package com.ggstudios.divisionbyzero;
//from   ww w.j  ava 2  s .  co m
import static fix.android.opengl.GLES20.glDrawElements;
import static fix.android.opengl.GLES20.glVertexAttribPointer;

import com.ggstudios.utils.BufferUtils;
import com.ggstudios.utils.DebugLog;

import android.opengl.GLES20;

public class TowerManager extends DrawableCollection<Tower> {
  private static final String TAG = "TowerManager";

  private int bufferHandle;
  private int textureHandle;

  private static final int TEXTURE_DATA_SIZE = 4 * 4;
  private static final int MAX_TEXTURES = 300;

  private float[] vertexBuffer = new float[MAX_TEXTURES * TEXTURE_DATA_SIZE];

  private boolean dirty = false;

  public void loadGlData() {
    DebugLog.d(TAG, "loadGlData()");
    refresh();
  }

  @Override
  public void addDrawable(final Tower t) {
    super.addDrawable(t);

    dirty = true;
  }

  @Override
  public void removeDrawable(int index) {
    super.removeDrawable(index);

    dirty = true;
  }

  @Override
  public void draw(float offX, float offY) {
    if(dirty) {
      cleanBuffer();
    }

    Utils.resetMatrix();
    Utils.translateAndCommit(offX, offY);

    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureHandle);
    GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, bufferHandle);
    GLES20.glBindBuffer(GLES20.GL_ELEMENT_ARRAY_BUFFER, Core.indiceHandle);

    glVertexAttribPointer(Core.A_POSITION_HANDLE, 2, GLES20.GL_FLOAT, false, TEXTURE_DATA_SIZE, 0);
    glVertexAttribPointer(Core.A_TEX_COORD_HANDLE, 2, GLES20.GL_FLOAT, false, TEXTURE_DATA_SIZE, 2 * 4);
    glDrawElements(GLES20.GL_TRIANGLES, len * 6, GLES20.GL_UNSIGNED_SHORT, 0);

    Core.gr.restoreTextureHandle();

    for(int i = len - 1; i >= 0; i--) {
      drawables.get(i).drawSpecial(offX, offY);
    }
  }

  private void cleanBuffer() {
    dirty = false;

    int offset = 0;
    final float mapH = Core.MAP_SDP / 2f;
    for(int i = len - 1; i >= 0; i--) {
      drawables.get(i).drawSprite(vertexBuffer, offset, -mapH, -mapH);
      offset += TEXTURE_DATA_SIZE;
    }

    bufferHandle = BufferUtils.copyToBuffer(vertexBuffer, offset);
  }

  @Override
  public void refresh() {    
    textureHandle= Core.tm.get(R.drawable.tower_atlas);
    if(textureHandle == -1) return;
    
    bufferHandle = Core.GeneralBuffers.map_tile.handle;

    super.refresh();

    if(this.len != 0) {
      int offset = 0;
      final float mapH = Core.MAP_SDP / 2f;
      for(int i = this.len - 1; i >= 0; i--) {
        drawables.get(i).drawSprite(vertexBuffer, offset, -mapH, -mapH);
        offset += TEXTURE_DATA_SIZE;
      }

      bufferHandle = BufferUtils.copyToBuffer(vertexBuffer, offset);    
    }
  }

  public void invalidate() {
    dirty = true;
  }
}

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